Yokogawa ca71 руководство по эксплуатации

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YOKOGAWA CA71 HANDY CAL Test Equipment PDF Operation & User’s Manual (Updated: Monday 3rd of April 2023 02:10:47 AM)

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User’s
Manual
Model CA51/71
HANDY CAL
(Calibrator)
IM CA71-E
IM CA71-E
2nd Edition: Dec. 2006
Introduction
Thank you for purchasing the CA51/71 HANDY CAL Calibrator. This
User’s Manual explains the functions of the CA51/71, as well as the
operating methods and handling precautions. Before using the CA51/
71, read this manual thoroughly to ensure correct use of the instrument. When you have finished reading this manual, store it in the carrying case for future reference.
■ Notes
● This manual exclusively describes the CA71, which is more multifunctional than the CA51. The CA51 has no temperature measurement
and communication functions.
● The contents of this manual are subject to change without prior notice
for reasons of improvements in performance and/or functionality.
● Every effort has been made to ensure the accuracy of this manual. If
you notice any errors or have any questions, however, please contact
the vender from which you purchased the instrument.
● The content of this manual may not be transcribed or reproduced, in
part or in whole, without prior permission.
■ Trademark Acknowledgments
● All other company and product names appearing in this document are
trademarks or registered trademarks of their respective holders.
■ Revision Information
February 2002: First edition
December 2006: 2nd edition
Disk No. CA71-E
2nd Edition: Dec.2006
All Rights Reserved. Copyright © 2002, Yokogawa M&C Corporation
IM CA71-E
i
Checking Items in the Package
After opening the package, check the product as follows before use. If
the delivered product is the wrong model, any item is missing, or there
are visible defects, contact the vendor from which you purchased the
product.
Main Unit
Check the model (specifications) codes in the MODEL and SUFFIX
fields of the nameplate at the back of the instrument to ensure that the
instrument is exactly as specified in your purchase order.
• Model Codes
Model
Specification
CA51
Basic model
CA71
Provided with temperature measurement and communication functions
• NO. (Serial Number)
Refer to this serial number on the nameplate when contacting the vendor about the instrument.
ii
IM CA71-E
Checking Items in the Package
Standard Accessories
Make sure that the package contains all the accessories listed below
and that they are all free from any damage.
Lead cables
for source
(98020)
Terminal adapter
(99021)
Lead cables for
measurement
(RD031)
Carrying case
(93016)
AA-size (LR6)
alkaline batteries
(four units)
Fuse
(A1501EF)
User’s manual
(IM CA71-E)
Optional Accessories
The products listed below are available as optional accessories. If you
purchased some of the optional accessories, make sure the delivered
package is complete with the ordered items and they are free from any
damage. For technical and ordering inquiries concerning the accessories, contact the vendor from which you purchased the instrument.
IM CA71-E
Product
Part Number
Remarks
AC adapter
AC adapter
AC adapter
RJ sensor
A1020UP
A1022UP
B9108WB
B9108WA
For 100 V AC
For 120 V AC
For 220 to 240 V AC
For reference junction
compensation
Accessories case
Communication cable (RS232)
B9108XA
91017
(For CA71 only)
iii
Checking Items in the Package
Optional Spare Parts
Product
Part Number
Lead cable for source
Lead cable for measurement
Carrying case
Terminal adapter
98020
RD031
93016
99021
Fuse
A1501EF
Accessories case
RJ sensor
Remarks
Used for temperature
measurement
10 units as a kit
Communication cable
AC adapter
iv
IM CA71-E
Precautions for Safe Use of the Instrument
For the correct and safe use of the instrument, be sure to follow the
cautionary notes stated in this manual whenever handling the instrument. Yokogawa Meters & Instruments Corporation shall not be held
liable for any damage resulting from use of the instrument in a manner
other than prescribed in the cautionary notes.
The following symbols are used on the instrument and in the User’s
Manual to ensure safe use.
Danger! Handle with Care.
This symbol indicates that the operator must refer to an explanation
in the User’s Manual in order to avoid the risk of injury or loss of life
of personnel or damage to the instrument.
This symbol indicates DC voltage/current.
This symbol indicates AC voltage/current.
This symbol indicates AC or DC voltage/current.
WARNING
Indicates that there is a possibility of serious personal injury or loss of life if
the operating procedure is not followed correctly and describes the precautions for avoiding such injury or loss of life.
CAUTION
Indicates that there is a possibility of serious personal injury or damage to the
instrument if the operating procedure is not followed correctly and describes
the precautions for avoiding such injury or damage.
NOTE
Draws attention to information essential for understanding the operation and
features.
IM CA71-E
v
Precautions for Safe Use of the Instrument
TIP
Provides additional information to complement the present topic.
Damage to the instrument or personal injury or even loss of life may
result from electrical shock or other factors. To avoid this, follow the
precautions below.
WARNING
● Use in gases
Do not operate this instrument in areas where inflammable or explosive gases
or vapor exists. It is extremely hazardous to use the instrument under such
environments.
● Defects in protective features
Do not operate this instrument if any defect seems to exist in such protective features as fuses. Before operating the instrument, make sure the protective features are free from any defect.
● External connection
When connecting the instrument to the object under test or an external control circuit, or if you need to touch any external circuit, cut off the power to
the circuit and make sure no voltage is being supplied.
● Fuses
In order to prevent a possible fire, use a fuse with ratings (current, voltage,
and type) specified for the instrument. Do not short-circuit the fuse holder.
● Correctly use the lead cables for measurement (P/N: RD031) and source (P/
N: 98020) without mistaking one for the other. For high-voltage measurement, always use the lead cable for measurement.
● Opening of the case
No person other than our service personnel is allowed to open the case since
the instrument contains high-voltage parts.
For the safe use of the optional AC adapter, follow the precautions
given below.
WARNING
● Power supply
Before turning on the instrument, always make sure the voltage being supplied matches the rated supply voltage of the instrument.
vi
IM CA71-E
Contents
1
Introduction .................................................................................................. i
Checking Items in the Package .................................................................... ii
Precautions for Safe Use of the Instrument ................................................ v
1.
2.
3.
4.
Functions .................................................................................... 1-1
Names and Functions of Parts ................................................. 2-1
Before Starting Source/Measurement ...................................... 3-1
Source ......................................................................................... 4-1
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.
Connecting Cables to Terminals ................................................... 4-2
Sourcing DC Voltage, DC Current or SINK Current Signal ........... 4-3
4.2.1
Sourcing DC Voltage or DC Current Signal .................... 4-3
4.2.2
4–20 mA Function ........................................................... 4-4
4.2.3
20 mA SINK Function ...................................................... 4-5
4.2.4
Using As 24-V Loop Power Supply ................................. 4-6
Sourcing Resistance or RTD Signal ............................................. 4-7
Sourcing Thermocouple (TC) Signals ........................................... 4-9
4.4.1
When RJ Sensor Is Used
(Making Use of Reference Junction Compensation) ....... 4-9
4.4.2
When No RJ Sensor Is Used ........................................ 4-11
Sourcing Pulse Signals ............................................................... 4-12
4.5.1
Sourcing a Continuous Pulse Train ............................... 4-12
4.5.2
Sourcing the Preset Number of Pulses (Pulse Cycle) ... 4-14
4.5.3
Using the Contact Output .............................................. 4-16
Divided Output Function (n/m) .................................................... 4-18
Sweep Function .......................................................................... 4-20
Auto Step Function ..................................................................... 4-20
Temperature Monitor Function .................................................... 4-20
2
3
4
5
6
7
8
9
10
Measurement .............................................................................. 5-1
5.1
5.2
5.3
IM CA71-E
Connecting Cables to Terminals ................................................... 5-2
Measuring 300 V AC-range Voltage, DC Voltage,
AC Voltage or DC Current ............................................................. 5-4
5.2.1
Measuring 300 V AC-range Voltage ................................ 5-4
5.2.2
Measuring DC or AC Voltage .......................................... 5-4
5.2.3
Measuring DC Current .................................................... 5-4
Measuring Resistance or RTD (CA71 only) Signal ....................... 5-6
vii
11
12
Contents
5.4
5.5
6.
Memory Functions ..................................................................... 6-1
6.1
6.2
6.3
6.4
7.
Saving Data into Memory ............................................................. 6-2
6.1.1
Saving Data in the Order of Memory Numbers ............... 6-2
6.1.2
Saving Data by Selecting Desired Memory Number ....... 6-4
6.1.3
Overwriting Data in Memory ............................................ 6-4
Reading Data from Memory .......................................................... 6-5
Clearing Data in Memory .............................................................. 6-6
6.3.1
Clearing Data by Selecting Desired Memory Number .... 6-6
6.3.2
Clearing All In-Memory Data Globally ............................. 6-7
Sending Out Data from Memory - CA71 only - ............................. 6-7
Functions Provided by DIP Switch ........................................... 7-1
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
8.
Measuring Temperature with Thermocouple (TC) - CA71 only - ... 5-7
Measuring Frequency or Pulses ................................................... 5-8
5.5.1
Operating the Calibrator for Frequency Measurement .... 5-8
5.5.2
Operating the Calibrator for Measuring Number of Pulses ... 5-8
Sweep Function ............................................................................ 7-2
Auto Step Function ....................................................................... 7-4
Selecting the INT RJ Function ...................................................... 7-6
Selecting the IPTS-68 Function .................................................... 7-6
Switch Not Used ........................................................................... 7-7
Temp Switch ................................................................................. 7-7
Selecting the Contact In Function
(Contact Input for Pulse Measurement) ........................................ 7-7
Disabling the Automatic Power-off Feature ................................... 7-7
Communication Function - CA71 only - ................................... 8-1
8.1
8.2
8.3
8.4
8.5
8.6
8.7
Cables Connection and Interface Specifications .......................... 8-1
Setting the Mode ........................................................................... 8-2
Types of Mode .............................................................................. 8-2
Data Format .................................................................................. 8-3
Data Structure ............................................................................... 8-3
Commands ................................................................................... 8-4
Detailed Description of Commands .............................................. 8-5
9. Troubleshooting ......................................................................... 9-1
10. Method of Calibrator Adjustment ........................................... 10-1
10.1
viii
Calibration Standard Selection and Environmental
Requirements ............................................................................. 10-1
IM CA71-E
Contents
10.2
10.3
10.4
10.5
Adjusting Source Functions ........................................................ 10-3
Adjusting Measurement Functions ............................................. 10-6
10.3.1 Adjusting DC Voltage and DC Current Ranges ............. 10-6
10.3.2 Adjusting AC Voltage and Resistance (400 Ω) Ranges 10-8
Notes on the Adjustment of Temperature Ranges
- CAL71 only - ............................................................................. 10-9
Post-adjustment Verification ........................................................ 10-9
11. Using Accessories ................................................................... 11-1
12. Specifications ........................................................................... 12-1
IM CA71-E
ix
IM CA71-E
Ω
mA
3Wire
L
AC100V
Batteries
DC/DC
converter
Power
supply
circuit
Power-on/off switch
Shunt resistor
Input
selector &
voltage
divider
mA
AC adapter
FUSE
3W
Temperature
sensor
H
MEASURE
RJ
detection
circuit
Measurement mode
on/off switch
A/D
converter
MEASURE Mode
Section
Memory
Ω
V
mA
Reference
voltage
CPU
Display
DIP switch
A/D
converter
Temperature
sensor
Overcurrent
detection
Pulse
source
Output on/off relay
V
Current-to-voltage Ω
conversion
mA
Setting
Multiplying
D/A
converter
SOURCE Mode
Section
Communication
cable
RJ INPUT
L
SOURCE
H
■ Block Diagram
Functions
Constant
current
source
1. Functions
1
1-1
1. Functions
■ Main Functions
• Source
The calibrator sources a voltage, current, resistance, thermocouple
(TC), RTD, frequency or pulse signal at a preset level.
Function
Description
DC voltage
Sources a DC voltage signal in the 100 mV, 1 V, 10 V or 30
V range.
Sources a DC current signal in the 20 mA range.
Draws a sink current from an external power source in the
20 mA range.
Sources a resistance signal in the 400 Ω range.
Sources a thermoelectromotive force corresponding to the
temperature detected by a type-K, E, J, T, R, B, S, N, L or U
thermocouple.*1
Sources resistance corresponding to the temperature detected by a Pt100 or JPt100 RTD.*2
Sources a continuous pulse train with frequency in the 500
Hz, 1 kHz or 10 kHz range. This function also sources the
preset number of pulses defined by the frequency mentioned above.
DC current
SINK current
Resistance
Thermocouple (TC)
RTD
Frequency and pulse
1-2
IM CA71-E
1. Functions
Function
Description
DC voltage
Measures a DC voltage signal in the 100 mV, 1 V, 10 V or
100 V range.
Measures a DC voltage signal in the 1 V, 10 V, 100 V or 300
V range.
Measures a DC current signal in the 20 mA or 100 mA
range.
The current terminals are equipped with a built-in
overrange input protection fuse.
Measures a resistance signal in the 400 Ω range.
Measures temperature according to the type of thermocouple – K, E, J, T, R, B, S, N, L or U.*1 (CA71 only)
Measures temperature according to the type of RTD –
Pt100 or JPt100. *2 (CA71 only)
Measures frequency in the 100 Hz, 1 kHz or 10 kHz range.
For pulse signals, this function measures the number of
pulses as a CPM (count per minute) or CPH (count per
hour) reading.
AC voltage
DC current
Resistance
Thermocouple (TC)
RTD
Frequency and pulse
You can also select and configure the following functions.
Function
Description
Divided output function(n/m)
Sources a “setpoint × (n/m)” output signal, where the variables m and n are defined as m = 1 to 19 and n = 0 to m.
Memory
Stores up to 50 sourced and measured values as a set.
Sweep
Changes the output signal in a linear manner.
Auto step
Automatically changes the value of n in a setpoint × n/m
output in a step-by-step manner.
IM CA71-E
1-3
1
Functions
• Measurement
Independent of the source function, the calibrator measures DC voltage, AC voltage, DC current and resistance signals, a temperature signal based on a thermocouple (TC) or RTD, as well as frequency and
the number of pulses.
1. Functions
• Power Supply
The calibrator operates on AA-size (LR6) alkaline batteries or the optional AC adapter.
*1: The thermocouples comply with the Japanese Industrial Standard JIS
C1602-1995 (ITS-90), except for the type-L and U thermocouples that comply with DIN.
*2: The RTD comply with the Japanese Industrial Standard JIS C1604-1997
(ITS-90). The internal DIP switch can be configured so that the detectors
comply with IPTS-68 instead.
1-4
IM CA71-E
2. Names and Functions of Parts
5
3
4
2
11
12
7
13
1
20
8 9 10
19
18
17 2
Names and Functions of Parts
6
16 15 14
21
22
23
24
IM CA71-E
2-1
2. Names and Functions of Parts
■ Front Panel
1
2
POWER Key
Turns on/off the power supply.
LIGHT Key
Turns on/off the backlight of the LCD.
MEASURE Mode – Functions for Measurement
3 DC Voltage, AC Voltage, Resistance and Pulse Input Terminals
Serve as H (positive) and L (negative) input terminals when you measure DC voltage, AC voltage, resistance, and pulse signals.
4 DC Current Input Terminals
Serve as H (positive) and L (negative) input terminals when you measure a DC current signal. Also serve as L’ terminals when you carry out
3-wire resistance measurement.
5 Three-wire Input Terminals
6 Function Selector Switch
Selects a measurement function and its range.
7 RANGE DC/AC Key
Used to further select from range options within the selected function.
• If you have selected the 1 V, 10 V or 100 V range, use this key to
toggle between the DC and AC options.
• If you have selected the FREQ range, use this key to select the range
of frequency measurement, as the key cycles through the 100 Hz, 1
kHz, 10 kHz, CPM and CPH options.
• If you have selected the mA range, use this key to select from the 20
mA and 100 mA ranges.
• If you have selected the 100 mV TC range, use this key to select the
voltage range or the type of thermocouple, as the key cycles through
the 100 mV, K, E, J, T, R, B, S, N, L and U options. (CA71 only)
• If you have selected the Ω RTD range, use this key to select the
resistance range or the type of RTD, as the key cycles through the
400 Ω, Pt100 and JPt100 options. (CA71 only)
If you have selected the TC or RTD range in the source mode of
display, the TC or RTD type options on the SOURCE function side
precede those on the MEASURE mode side.
2-2
IM CA71-E
2. Names and Functions of Parts
8
SOURCE Mode – Functions for Generation
11 Output Terminals
These terminals are common to all of the source functions.
12 Function Selector Switch
Selects a source function and its range.
13 RANGE Key
Used to further select from range options within the selected function.
• If you have selected the 100 mV TC range, use this key to select the
voltage output or the type of thermocouple, as the key cycles through
the 100 mV, K, E, J, T, R, B, S, N, L and U options.
• If you have selected the 400 Ω RTD range, use this key to select the
resistance range or the type of RTD, as the key cycles through the
400 Ω, Pt100 and JPt100 options.
• If you have selected the PULSE range, use this key to select the
frequency range, as the key cycles through the 500.0 Hz, 1000 Hz
and 10 kHz options.
14 SOURCE ON Key
Turns on/off the source output.
15 PULSE SET Key
If you have selected the PULSE range, use this key to cycle through
the frequency, amplitude and pulse count options for pulses being generated.
16 TEMP Key
Allows you to monitor temperature by selecting from the room temperature (°C), reference junction temperature (°C), thermocouple (mV) and
RTD (Ω) options.
IM CA71-E
2-3
2
Names and Functions of Parts
MEASURE OFF Key
Turns on/off the MEASURE mode. Turning off the mode causes the
measured value shown on the LCD to disappear. If the MEASURE
mode is not in use and therefore turned off, the power to the measurement circuit within the calibrator is also turned off. This strategy saves
on battery power if the calibrator is running on batteries.
9 HOLD Key
Holds the measured value being displayed. Also used to start CPM or
CPH measurement or communication.
10 MEM Key
Used to turn on/off the memory function.
2. Names and Functions of Parts
17 n/m Key
Turns on/off the divided output function (n/m).
18 ▲ and ▼ Output Setting Keys
Set the output value of a source function. Each pair of ▲ and ▼ keys
corresponds to each digit of the reading, thus increasing/decreasing
the digit in units of 1s. Increasing the digit from 9 or decreasing it from
0 causes the digit to overflow or underflow, allowing you to set the output value without interruption. Holding down the ▲ or ▼ key continuously changes the digit in question.
If your choice is the 4–20 mA function, see Section 4.2, “Sourcing DC
Voltage, DC Current or SINK Current Signal,” for further details. Note
that ▲ and ▼ keys are also used in the following ways:
• The ▲ and ▼ keys labeled n and m serve as keys for setting the
variables n and m when you have selected the divided output function (n/m). (See Section 4.6, “Divided Output Function (n/m),” for
further details.)
• The ▲ and ▼ keys labeled MEM NO., SAVE and READ serve as
keys for working with the memory when you have selected the
memory function. (See Chapter 6, “Memory Function,” for further
details.)
19 CLEAR Key
Initializes the output setpoint, causing the on-screen reading to revert
to 0000 for functions other than PULSE and 20 mA SINK, though the
number of digits depends on function selected. This key serves as a
key for clearing the memory when the memory function is selected.
■ Side and Rear Panels
20 FUSE
A holder for housing a fuse that protects the input during DC current
measurement.
21 R.J.INPUT
A connector to which the external reference junction compensation
sensor is connected.
22 AC Adapter Connection Jack
23 Battery Holder
Opening the cover reveals the battery holder and DIP switch.
2-4
IM CA71-E
2. Names and Functions of Parts
24 I/O Port Cover
Open this cover to connect the RS232 communication cable (P/N:
91017). (CA71 only)
a
2
c
b
l
e
f
k
g
h
i
j
■ LCD Unit
a. Measured value
b. Setpoint for source
c. HOLD indicator
Indicates the on-screen measured value is in a hold state.
d. Contact input
Indicates the contact input is selected when your choice is pulse measurement.
e. ON/OFF indicators for output
ON: Indicates the output is on.
OFF: Indicates the output is off.
f. SWEEP indicator for sweep function
Comes on when the sweep function is selected using the DIP switch.
g. MEM NO. indicator
Shows a memory number when the memory function is selected.
h. AUTO STEP indicator
Comes on when the auto step function is selected.
i. Divided output function (n/m) indicator
Comes on when the divided output function (n/m) is selected. The
most significant two digits “18” denote the value of n, while the least
significant two digits “88” mean the value of m.
j. CAL mode selection indicator
The 0 and FS indicators below this indicator denote zero point and full
scale adjustments, respectively.
IM CA71-E
2-5
Names and Functions of Parts
d
2. Names and Functions of Parts
k. Battery replacement indicator
Shows the battery level in three steps according to the level of remaining electricity.
l. RJON indicator
Indicates reference junction compensation is active when
thermoelectromotive force is being sourced. The thermoelectromotive
force output when this indicator is off represents the 0°C-based output.
2-6
IM CA71-E
3. Before Starting Source/Measurement
■ Operating Precautions
General Handling Precautions
● Before carrying around the instrument turn off power to the object under test, and then the POWER key of the instrument. If you are using
an AC adapter, disconnect the power cord from the wall outlet. Finally,
detach all lead cables from the instrument. Use a dedicated carry case
when transporting the instrument.
● Do not bring any electrified object close to the input terminals, since the
internal circuit may be destroyed.
● Do not apply any volatile chemical to the instrument’s case or operation
panel. Do not leave the instrument in contact with any product made of
rubber or vinyl for a prolonged period. Be careful not to let a soldering
iron or any other heat-emitting object come into contact with the operation panel, as the panel is made of thermoplastic resin.
IM CA71-E
3-1
3
Before Starting Source/Measurement
Precautions for Safe Use of the Instrument
● When using the instrument for the first time, be sure to read the instructions given on pages iv and v of the section, “Precautions for Safe Use
of the Instrument.”
● Do not open the instrument’s case.
Opening the case is extremely hazardous, as the instrument contains
high-voltage parts. Contact the vendor from which you purchased the
instrument, for a service of inspecting or adjusting the internal assembly.
● In case of failure
Should the instrument begin to emit smoke, give off an unusual odor, or
show any other anomaly, immediately turn off the POWER key. If you
are using an AC adapter, disconnect the plug from the wall outlet. Also
cut off power to the object under test that is connected to the input
terminals. Then, contact the vendor from which you purchased the
instrument.
● AC adapter
Use an AC adapter dedicated to the instrument. Avoid placing any load
on the AC adapter, or prevent any heat-emitting object from coming
into contact with the adapter.
3. Before Starting Source/Measurement
● Before cleaning the instrument’s case or operation panel disconnect
the power cord plug from the wall outlet if you are using an AC adapter.
Use a soft, clean cloth soaked in water and tightly squeezed to gently
wipe the outer surfaces of the instrument. Ingress of water into the
instrument can result in malfunction.
● If you are using an AC adapter with the instrument and will not use the
instrument for a prolonged period, disconnect the power cord plug from
the wall outlet.
● For handling precautions regarding the batteries, see “Installing or Replacing the Batteries” on page 3-3.
● Never use the instrument with the cover of the battery holder opened.
■ Environmental Requirements
Use the instrument in locations that meet the following environmental
requirements:
• Ambient temperature and humidity
Ambient temperature range: 0 to 50°C
Ambient humidity range:
20 to 80% RH. Use the instrument
under non-condensing condition.
• Flat and level locations
Do not use the instrument in locations that are:
• exposed to direct sunlight or close to any heat source;
• exposed to frequent mechanical vibration;
• close to any noise source, such as high-voltage equipment or motive power sources;
• close to any source of intensive electric or electromagnetic fields;
• exposed to large amounts of greasy fumes, hot steam, dust or corrosive gases;
• unstable; or
• exposed to a risk of explosion due to the presence of flammable
gases.
3-2
IM CA71-E
3. Before Starting Source/Measurement
NOTE
• Use the instrument under the following environmental conditions if precise
source or measurement is your requirement:
Ambient temperature range: 23±5°C; ambient humidity range: 20 to 80% RH
(non-condensing)
When using the instrument within a temperature range of 0 to 18°C or 28 to
50°C, add a value based on the temperature coefficient shown in Chapter 12,
“Specifications (page 12-1),” to the given accuracy rating.
• Condensation may occur if you relocate the instrument from places with low
temperature and humidity to places with high temperature and humidity, or if
the instrument experiences any sudden temperature change. In that case,
leave the instrument under the given ambient temperature for at least one
hour to ensure that the instrument is free from condensation, before using
the instrument.
■ Installing or Replacing the Batteries
WARNING
● To avoid electrical shock, always remove the source or measurement lead
cables from the object under test, as well as from the instrument itself.
CAUTION
• To avoid the risk of fluid leakage or battery explosion, install batteries with
their positive and negative electrodes correctly positioned.
• Do not short-circuit the batteries.
• Do not disassemble or heat the batteries or throw them into fire.
• When replacing batteries, replace all of the four batteries at the same time
with new ones from the same manufacturer.
• If the instrument will not be used for a prolonged period, remove the batteries from the instrument.
IM CA71-E
3-3
Before Starting Source/Measurement
• When using the instrument at an ambient humidity of 30% or lower, prevent
electrostatic charges from being produced, by using an antistatic mat or any
other alternative means.
3
3. Before Starting Source/Measurement
Step 1: Remove the lead cables and AC adapter and turn off the calibrator before you begin installing batteries.
Step 2: Remove the battery holder cover by sliding it in the direction
indicated by →OPEN.
Step 3: Install four AA-size (LR6) alkaline batteries in the battery
holder with their positive and negative electrodes positioned
correctly as indicated on the holder.
Step 4: After replacement, reattach the battery holder cover.
OP
EN
OP
EN
Indication of Battery Level
The battery replacement indicator shows the battery level in three
steps according to the measured voltage of the batteries.
(lit constantly) ...... The battery level is normal.
(lit constantly) ...... The battery level is below 50% full, but still
allows for normal operation.
(flashing) ............. Replace the batteries.
Note that the battery replacement indicator is driven by directly measuring the battery voltage when the calibrator is in actual operation.
Consequently, the indicator may read differently depending on the battery load condition (e.g., the load condition of the source output or on/
off state of the measurement function) if the batteries are too low.
3-4
IM CA71-E
3. Before Starting Source/Measurement
If the calibrator will be used under a wide variety of conditions, it is
advisable that the battery replacement indicator be verified under
heavy loads (MEASURE mode is on and the SOURCE mode is set to
the 20 mA/10 V output).
■ Connecting the AC Adapter
3
WARNING
● Do not use any AC adapter other than the dedicated AC adapter from
Yokogawa M&C Corporation.
Step 1: Make sure the calibrator is turned off.
Step 2: Insert the plug of the optional AC adapter into the AC adapter
connection jack.
■ Turning On/Off the Power
Turning On/Off the POWER Switch
• Pressing the
Pressing the
key once when the power is off turns on the calibrator.
key once again turns off the calibrator.
NOTE
Before disconnecting the AC adapter from an AC power source, turn off the
calibrator by pressing the
key.
NOTE
When operating the calibrator on batteries, disconnect the AC adapter plug
from the instrument. Once you connect the AC adapter plug to the instrument,
the instrument no longer operates on batteries. Thus, the instrument will not
turn on unless the AC adapter is connected to an AC power source.
IM CA71-E
3-5
Before Starting Source/Measurement
● Make sure the voltage of the AC power source matches the rated supply
voltage of the AC adapter, before connecting the AC adapter to the AC power
source.
3. Before Starting Source/Measurement
Turning On/Off MEASURE Mode
Pressing the
key after power-on turns off the MEASURE
mode.
• If the MEASURE mode is not needed and therefore turned off,
power to the measurement circuit is also turned off within the calibrator. Thus, you can save on battery power if the calibrator is
running on batteries.
• Turning off the MEASURE mode causes the on-screen measured
value to disappear.
• To resume measurement when the MEASURE mode is off, press
key once again.
the
TIP
One to two seconds are taken for the LCD to turn on after the MEASURE mode is
turned on.
■ Automatic Power-off
• When the calibrator is running on batteries and no key is operated for
approximately nine minutes, all elements on the LCD begin to blink.
The calibrator gives off a buzzer sound to alert you. If you still do not
operate any key for another 30 seconds, the calibrator automatically
turns off. The automatic power-off feature is factory-set to ON.
• To continue using the calibrator after the LCD has begun blinking,
key. The LCD stops blinking and
press any key other than the
lights steady, allowing you to continue from the original status of the
calibrator.
• The automatic power-off feature is disabled if the calibrator is operated
on the AC adapter.
• To disable the automatic power-off feature when the calibrator is battery-operated, see Section 7.8, “Disabling the Automatic Power-off
Feature.”
3-6
IM CA71-E
3. Before Starting Source/Measurement
■ Turning On/Off the Backlight
The LCD can be back-lit. Pressing the
key turns on the backlight,
while pressing the key once again turns it off. This feature makes it
easier for you to view the LCD when operating the calibrator in dark
places or when carrying out source or measurement. Note that battery
life shortens when the calibrator is operated on batteries.
3
NOTE
IM CA71-E
3-7
Before Starting Source/Measurement
The backlight automatically turns off approximately one minute later. To turn
on the backlight again, press the
key once again.
3. Before Starting Source/Measurement
■ Operating Environment
Operating Environment
Ambient Temperature and Humidity
Use the CA51/71 in the following environment:
• Ambient temperature: 0 to 50°C
• Ambient humidity: 20 to 80 % RH (no condensation)
Operating Altitude
2000 m max. above sea level.
Location
Indoors
Measurement Category (CAT.)
The measurement category of the CA51/71 is III (300 Vrms max.).
WARNING
Do not use the CA150 for measurements in locations falling under Measurement Categories IV.
3-8
IM CA71-E
3. Before Starting Source/Measurement
Measurement Category
Description
I
CAT. I
For measurement performed
on circuits not directly
connected to MAINS.
Remarks
II
CAT. II
For measurement performed
on circuits directly connected
to the low voltage installation.
Appliances, portable
equipments, etc.
III
CAT. III
For measurement performed
in the building installation.
Distribution board,
circuit breaker, etc.
IV
CAT. IV
For measurement performed
at the source of low-voltage
installation.
Overhead wire,
cable systems, etc.
Internal Wiring
Entrance
Cable
CAT. IV
Distribution
Board
CAT. III CAT. II
T
CAT. I
Fixed Equipment,
etc.
Outlet
Equipment
Pollution Degree
Pollution Degree applies to the degree of adhesion of a solid, liquid, or
gas which deteriorates withstand voltage or surface resistivity.
The pollution degree of the CA150 in the operating environment is 2.
Pollution Degree 2 applies to normal indoor atmospheres. Normally,
only non-conductive pollution is emitted. However, a temporary electrical conduction may occur depending on the concentration.
IM CA71-E
3-9
3
Before Starting Source/Measurement
Measurement Category
4. Source
From the calibrator, you can source a DC voltage, DC current, SINK
current, resistance, thermocouple, RTD, frequency or pulse signal.
WARNING
● To avoid electrical shock, do not apply any voltage above 30 V to the output
terminals. Always use the calibrator in locations with a voltage to ground
below 30 V.
4
CAUTION
• The instrument has been calibrated without taking into account a voltage
drop due to the resistance component of the lead cables for source. Care
must be taken therefore when drawing a load current since the voltage drop
due to the resistance component (approximately 0.1 Ω on a round-trip basis)
of the lead cables serves as an error.
IM CA71-E
4-1
Source
• Do not apply any voltage to the output terminals for ranges other than 20 mA
SINK. Otherwise, the internal circuitry may be damaged.
4.1 Connecting Cables to Terminals
4.1
Connecting Cables to Terminals
Red Black Black
Lead cables for
source
(98020)
For DC voltage, DC current, thermocouple or pulse output
Step 1: Connect the red lead cable for source (P/N: 98020) to the H
output terminal and the black lead cable to the L output terminal.
Step 2: Connect the two clips of the cables to the input of equipment
under test while making sure the polarities are correct.
For 3-wire connection resistance or RTD signal
Step 1: Connect the red lead cable for source (P/N: 98020) to the H
output terminal, and both black lead cables to the L output
terminal. (The two black lead cables should be fastened together to the L output terminals.)
Step 2: Connect the three leading clips of the cables to the input of
equipment under test while making sure the polarities are correct.
4-2
IM CA71-E
4.2 Sourcing DC Voltage, DC Current or SINK Current Signal
4.2
4.2.1
Sourcing DC Voltage, DC Current or SINK
Current Signal
Sourcing DC Voltage or DC Current Signal
Step 1: Using the Function selector switch, select the desired source
, ,
,
and
.
function from
Step 2: The LCD shows the default value and unit of the source function.
Pressing the
fault value (0).
key initializes the output setpoint to the de-
key causes the
indicator on the LCD
Step 4: Pressing the
to . The calibrator sources the preset
to change from
DC voltage or current signal between the output terminals.
key once again. The
Step 5: To turn off the output, press the
appears on the LCD and the output terminals are open-circuited.
IM CA71-E
4-3
4
Source
and
Step 3: Set the output value digit by digit using each pair of
output setting keys.
and
keys corresponds to each digit of the
Each pair of
and
key increases or
LCD reading. Each press of the
decreases the digit. Increasing the digit from 9 or decreasing
it from 0 causes the digit to overflow or underflow, allowing
you to set the output value without interruption. Holding down
or
key continuously changes the digit in question.
the
4.2 Sourcing DC Voltage, DC Current or SINK Current Signal
TIP
If either of the following cases applies, the protection circuit works to turn off the
output.
• The output terminals or the lead cables for source connected to the output terminals are short-circuited or an excessive load current has flowed through the cables
when a voltage is being output.
• The output terminals or the lead cables for source connected to the output terminals are open-circuited or an excessive load voltage has been sourced between
the output terminals when a current is being output.
4.2.2
4–20 mA Function
You can set a 4–20 mA signal in 4 mA increments.
Step 1: Using the function selector switch, select
.
Step 2: Using each pair of
and
output setting keys, which correspond to each digit of a value from 4 to 20, set the signal in a
step-by-step manner. You can set the signal in 4 mA increments or decrements in the order 4 ⇔ 8 ⇔ 12 ⇔ 16 ⇔ 18 ⇔
and
keys for the decimals to
20 mA. Use the pairs of
make fine adjustments, as the keys let you set the decimals in
key initializes the signal
normal resolution. Pressing the
setpoint to the default value (4.00).
key causes the
indicator on the LCD
Step 3: Pressing the
to . The calibrator sources the preset
to change from
4–20 mA current signal between the output terminals.
key once again. The
Step 4: To turn off the output, press the
appears on the LCD and the output terminals are open-circuited.
TIP
If the signal setpoint is 3 mA or less, no step-by-step setting is possible even if you
operate the higher-order output setting keys.
4-4
IM CA71-E
4.2 Sourcing DC Voltage, DC Current or SINK Current Signal
4.2.3
20 mA SINK Function
The 20 mA SINK function can draw a preset amount of current from an
external voltage source to the H terminal. Thus, you can use the calibrator in a loop test, for example, as a simulator for two-wire transmitters. In that case, use this function within the 5 to 28 V range of applied
voltages. The minimum value of the range for the 20 mA SINK function
is 0.1 mA. You can test the I/O signals of a distributor by wiring the
calibrator as indicated by the dashed lines in the following figure.
4
24V DC
Distributor
Source
4-20 mA
1-5 V output
H L mA
H L
MEASURE SOURCE
CA71
AC or DC power supply
Drawing SINK Current
Step 1: Before connecting to the terminals, select
range setting rotary switch.
with the source
Step 2: Connect the positive terminal of an external power source to
the H output terminal and the negative terminal to the L output
terminal.
key.
Step 3: Turn on the external power source and press the
The
indicator on the LCD changes from
to . The
calibrator sources the preset current value of the 20 mA SINK
function between the output terminals.
key once again. The
Step 4: To turn off the output, press the
appears on the LCD and the output terminals are open-circuited.
IM CA71-E
4-5
4.2 Sourcing DC Voltage, DC Current or SINK Current Signal
4.2.4
Using As 24-V Loop Power Supply
A maximum load current of 22 mA can be drawn from the calibrator by
selecting the 30 V range and setting the sourced voltage to 24 V. With
this function, you can use the calibrator as a loop power supply in place
of the distributor in a two-wire loop, as shown in the following figure.
Thus, you can measure a 4–20 mA current signal. Using the supplied
terminal adapter (P/N: 99021) makes it easy to wire the calibrator for
this application.
NOTE
Since the function discussed above requires a significant amount of DC current (22 mA), operation on batteries will reduce the battery life considerably. To
avoid this problem, operate the calibrator on the AC adapter. In this application, no source output other than 24 V can be taken at the same time.
Input
Two-wire
transmitter
A
4-20 mA
24V
L mA
H L
MEASURE SOURCE
24 V output
CA71
AC adapter
Using As a Loop Power Supply
4-6
IM CA71-E
4.3 Sourcing Resistance or RTD Signal
4.3
Sourcing Resistance or RTD Signal
◆ Output Method Based on Three-wire Connection
Attach another lead cable to the L output terminal, as shown in the
following figure. The output is provided through the three wires, H, L
and L’. Connect these three wires to the device being calibrated.
H
L
L'
H L
SOURCE
Three-wire measuring equipment
CA71
Three-wire Connection for Resistance Signal Source
IM CA71-E
4-7
4
Source
• The calibrator sources a resistance signal by 1) receiving the resistance-measuring current I supplied from the device being calibrated,
such as a resistance meter or RTD thermometer, and 2) delivering the
voltage V = R × I proportional to the preset resistance R between the
output terminals, and 3) thus producing the equivalent resistance R =
V/I. Consequently, the calibrator sources the signal correctly only for
such devices that employ this method of measurement.
• The allowable range of the resistance measuring current I that the calibrator receives from a resistance measuring device under calibration is
rated as 0.1 to 5 mA. Note, however, that accuracy lowers for resistance measuring currents smaller than 0.5 mA. For further details, see
Chapter 12, “Specifications.”
• Any resistance signal being sourced does not include the resistance
component of the lead cables for source. The calibrator is adjusted so
that the signal has a resistance value as viewed from the output terminals. The whole resistance, when measured at the ends of the lead
cables for source, is given by adding the resistance of the lead cables
themselves (approximately 0.1 Ω on a round-trip basis) to the sourced
resistance signal. For source of precise resistance signals, use threewire connection.
• If capacitance between the terminals of a device under calibration is
greater than 0.1 µF, the calibrator may fail to source correct resistance
signals.
4.3 Sourcing Resistance or RTD Signal
Step 1: Using the function selector switch, select
.
Step 2: Using the
key, select the range. Pressing the
cycles through the 400 Ω, PT100 and JPT100 options.
key
Step 3: Set the output value digit by digit using each pair of
and
keys. Each press of the
or
key increases or decreases
the digit. Increasing the digit from 9 or decreasing it from 0
causes the digit to overflow or underflow, allowing you to set
or
the output value without interruption. Holding down the
key continuously changes the digit in question. Pressing
the
(0).
key initializes the output setpoint to the default value
key causes the
indicator on the LCD
Step 4: Pressing the
to . The calibrator sources the preset
to change from
resistance value between the output terminals.
key once again. The
Step 5: To turn off the output, press the
appears on the LCD and the output terminals are open-circuited.
4-8
IM CA71-E
4.4 Sourcing Thermocouple (TC) Signals
4.4
4.4.1
Sourcing Thermocouple (TC) Signals
When RJ Sensor Is Used (Making Use of Reference Junction Compensation)
To calibrate a device with built-in reference junction temperature compensation by sourcing a thermoelectromotive force with the calibrator
without using any external 0°C reference junction compensation
means, use the optional RJ sensor (P/N: B9108WA).
Step 2: Using the function selector switch, select
.
Step 3: Using the
key, select the type of thermocouple. Select
the type from K, J, E, T, R, B, S, N, L and U. The selected
type of thermocouple is shown on the LCD.
Step 4: When the RJ sensor is connected, the calibrator goes into the
RJ ON status and the RJON symbol appears on the LCD.
and
Step 5: Set the output value digit by digit using each pair of
output setting keys.
and
keys corresponds to each digit of the
Each pair of
LCD reading. Each press of the
or
key increases or
decreases the digit. Increasing the digit from 9 or decreasing
it from 0 causes the digit to overflow or underflow, allowing
you to set the output value without interruption. Holding down
or
key continuously changes the digit in question.
the
key initializes the output setpoint to the dePressing the
fault value (600°C for a type-B thermocouple).
IM CA71-E
4-9
4
Source
Step 1: Insert the RJ sensor into the R.J.INPUT connector of the calibrator. Insert the sensor until the locking claw in the bottom of
the sensor connector locks with a click. To unplug the sensor
connector, unlock the connector by gently pushing the locking
claw.
4.4 Sourcing Thermocouple (TC) Signals
Step 6: Pressing the
key causes the
indicator on the LCD
to . A thermoelectromotive force based
to change from
on the temperature detected by the RJ sensor develops between the output terminals.
key once again. The
Step 7: To turn off the output, press the
appears on the LCD and the output terminals are open-circuited.
NOTE
• When you have attached the RJ sensor to the device being calibrated, wait
until the detected temperature stabilizes before you begin using the calibrator.
• If no reference junction compensation is required, be sure to remove the RJ
sensor from the calibrator.
TIP
As a means of easily providing reference junction compensation without using any
external RJ sensor, you can use the temperature sensor within the calibrator. For
further details on how to work the temperature sensor, see Section 7.3, “Selecting the
INT RJ Function.”
4-10
IM CA71-E
4.4 Sourcing Thermocouple (TC) Signals
4.4.2
When No RJ Sensor Is Used
From the output terminals, the calibrator sources a thermoelectromotive
force corresponding to the preset temperature of a selected thermocouple. The thermoelectromotive force is sourced with reference to
0°C.
Step 1: Using the function selector switch, select
.
Step 2: Using the
key, select the type of thermocouple. Select
the type from K, J, E, T, R, B, S, N, L and U. The selected
type of thermocouple is shown on the LCD.
Pressing the
key initializes the output setpoint to the default value (600°C for a type-B thermocouple).
key causes the
indicator on the LCD
Step 4: Pressing the
to . A thermoelectromotive force (mV)
to change from
equivalent to the preset temperature develops between the
output terminals.
key once again. The
Step 5: To turn off the output, press the
appears on the LCD and the output terminals are open-circuited.
IM CA71-E
4-11
Source
and
Step 3: Set the output value digit by digit using each pair of
output setting keys.
and
keys corresponds to each digit of the
Each pair of
or
key increases or
LCD reading. Each press of the
decreases the digit. Increasing the digit from 9 or decreasing
it from 0 causes the digit to overflow or underflow, allowing
you to set the output value without interruption. Holding down
or
key continuously changes the digit in question.
the
4
4.5 Sourcing Pulse Signals
4.5
Sourcing Pulse Signals
You can source a preset type of continuous pulse train, a pulse signal
with a preset frequency, or the preset number of pulses.
Amplitude setpoint
Continued
0V
Frequency-based
signal
Source of
number of pulses
OFF ON
Press “
1
2
” key
3
n
n = Preset number
of pulses
Automatically turned off
Providing Pulse Output
4.5.1
Sourcing a Continuous Pulse Train
Step 1: Using the function selector switch, select
.
shows the default frequency
. The LCD
Step 2: Using the
key, set the frequency range. Pressing of the
key cycles through the 500.0 Hz, 1000 Hz and 10 kHz
options.
and
Step 3: Set the output value digit by digit using each pair of
output setting keys.
and
keys corresponds to each digit of the
Each pair of
LCD reading. Each press of the
or
key increases or
decreases the digit. Increasing the digit from 9 or decreasing
it from 0 causes the digit to overflow or underflow, allowing
you to set the output value without interruption. Holding down
or
key continuously changes the digit in question.
the
key initializes the output setpoint to the dePressing the
fault value (differs depending on the frequency range).
key once switches to amplitude setting
Step 4: Pressing the
.
mode. The LCD provides a reading of
4-12
IM CA71-E
4.5 Sourcing Pulse Signals
Step 5: Set the output value digit by digit using each pair of
and
output setting keys.
and
keys corresponds to each digit of the
Each pair of
or
key increases or
LCD reading. Each press of the
decreases the digit. Increasing the digit from 9 or decreasing
it from 0 causes the digit to overflow or underflow, allowing
you to set the output value without interruption. Holding down
or
key continuously changes the digit in question.
the
Pressing the
key initializes the output setpoint to the default value (0.1 V).
key causes the
indicator on the LCD
Step 7: Pressing the
to . The calibrator sources a continuto change from
ous pulse train with the preset frequency and amplitude between the output terminals.
key once again. The
Step 8: To turn off the output, press the
symbol appears on the LCD and the output terminals are
open-circuited.
TIP
To change the frequency range, place the calibrator in frequency setting mode with
key. Then, change the frequency range using the
key.
the
IM CA71-E
4-13
4
Source
Step 6: Press the
key once again to show
on the LCD.
key one more time to revert to freThen, press the
quency setting mode.
4.5 Sourcing Pulse Signals
4.5.2
Sourcing the Preset Number of Pulses (Pulse
Cycle)
Step 1: Using the function selector switch, select
.
shows the default frequency
. The LCD
Step 2: Using the
key, set the frequency range. Each press of
key cycles through the 500.0 Hz, 1000 Hz and 10
the
kHz options.
and
Step 3: Set the output value digit by digit using each pair of
output setting keys.
and
keys corresponds to each digit of the
Each pair of
or
key increases or
LCD reading. Each press of the
decreases the digit. Increasing the digit from 9 or decreasing
it from 0 causes the digit to overflow or underflow, allowing
you to set the output value without interruption. Holding down
or
key continuously changes the digit in question.
the
key initializes the output setpoint to the dePressing the
fault value (differs depending on the frequency range).
key once switches to amplitude setting
Step 4: Pressing the
.
mode. The LCD provides a reading of
Step 5: Set the output value digit by digit using each pair of
and
output setting keys.
Each pair of
and
keys corresponds to each digit of the
or
key increases or
LCD reading. Each press of the
decreases the digit. Increasing the digit from 9 or decreasing
it from 0 causes the digit to overflow or underflow, allowing
you to set the output value without interruption. Holding down
or
key continuously changes the digit in question.
the
Pressing the
key initializes the output setpoint to the default value (0.1 V).
Step 6: Press the
key once again to show
on the LCD.
Then, press the
key. The source setpoint reading of the
LCD changes to a numeric value, which represents the number of pulses.
4-14
IM CA71-E
4.5 Sourcing Pulse Signals
Step 7: Set the number of pulses value digit by digit using each pair of
and
output setting keys. Each press of the
or
key
increases or decreases the digit. Increasing the digit from 9
or decreasing it from 0 causes the digit to overflow or underflow, allowing you to set the output value without interruption.
or
key continuously changes the digit
Holding down the
in question. Pressing the
key initializes the output
setpoint to the default (
), thus reverting to the mode of
sourcing continuous pulse trains.
Step 9: When source is complete, the calibrator automatically turns
appears on the
off the output and ceases operation. The
LCD and the output terminals are open-circuited.
TIP
To stop sourcing pulses halfway, press the
The
IM CA71-E
key when pulse output is in progress.
appears on the LCD and the output terminals are open-circuited.
4-15
4
Source
key causes the
indicator on the LCD
Step 8: Pressing the
to . The calibrator sources the preset
to change from
number of pulses with the preset frequency and amplitude
between the output terminals.
4.5 Sourcing Pulse Signals
4.5.3
Using the Contact Output
You can turn on or off the output terminals. This setting is possible for
both the mode of sourcing a continuous pulse train and the mode of
sourcing a given number of pulses. An FET is used as the contact
switching device. Since the way of using the contact output is the same
for both the source of continuous pulse trains and the source of a number of pulses, this subsection only refers to the procedure for continuous pulse trains.
Step 1: Using the function selector switch, select
.
shows the default frequency
. The LCD
Step 2: Using the
key, set the frequency range. Each press of
key cycles through the 500.0 Hz, 1000 Hz and 10
the
kHz options.
and
Step 3: Set the output value digit by digit using each pair of
output setting keys.
and
keys corresponds to each digit of the
Each pair of
or
key increases or
LCD reading. Each press of the
decreases the digit. Increasing the digit from 9 or decreasing
it from 0 causes the digit to overflow or underflow, allowing
you to set the output value without interruption. Holding down
or
key continuously changes the digit in question.
the
key initializes the output setpoint to the dePressing the
fault value (differs depending on the frequency range).
key once switches to amplitude setting
Step 4: Pressing the
.
mode. The LCD provides a reading of
Step 5: Changing the reading of
to
with the
calibrator to enter contact output mode.
key causes the
key once again to show
on the LCD.
Step 6: Press the
key one more time to revert to freThen, press the
quency setting mode.
4-16
IM CA71-E
4.5 Sourcing Pulse Signals
Step 7: Pressing the
key causes the
indicator on the LCD
to . The output terminals turn on and off
to change from
at the preset frequency.
key once again. The
Step 8: To turn off the output, press the
appears on the LCD and the output terminals are open-circuited.
NOTE
• The contact has polarities. Always connect the positive side to the H output
terminal of the calibrator and the negative side to the L output terminal.
4
• Exercise the utmost care not to allow the contact current to exceed 50 mA.
Source
IM CA71-E
4-17
4.6 Divided Output Function (n/m)
4.6
Divided Output Function (n/m)
The divided output function (n/m) outputs a value n/m times the
setpoint of a voltage, current, resistance, thermocouple or RTD signal.
Thus, the output value is defined as:
Output value = Main setpoint × (n/m)
Keys and labels related to divided output function (n/m)
For details on how to set the sourced signal level of each range, see
Sections 4.2, “Sourcing DC Voltage, DC Current or SINK Current Signal, to 4.4, “Sourcing Thermocouple (TC) Signal.” Follow the steps
shown below with the calibrator output turned off.
Step 1: When the setting of the sourced signal level of each range is
complete, follow step 2 and later steps.
Step 2: Using each pair of
Step 3: Press the
or
keys, set the main setpoint.
key to enter the divided output (n/m) mode.
The LCD shows
. The higher-order two digits represents the value of n and the lower-order two digits the value of
m.
Step 4: Using a pair of
or
keys, set the value of m. The variable
m can be set to a value from 1 to 19.
or
keys, change the value of n. An
Step 5: Using a pair of
output value n/m times the main setpoint can be obtained according to the setpoint of n. The variable n can be set to a
value from 0 to m.
4-18
IM CA71-E
4.6 Divided Output Function (n/m)
Step 6: Pressing the
key causes the
indicator on the LCD
to change from
to
. The calibrator sources a (main
setpoint) × (n/m) signal between the output terminals for each
range selected.
key once again. The
Step 7: To turn off the output, press the
appears on the LCD and the output terminals are open-circuited.
key one more time cancels the divided outStep 8: Pressing the
put (n/m) mode.
4
TIP
IM CA71-E
4-19
Source
To change the main setpoint, temporarily cancel the divided output (n/m) mode. Set
the main setpoint once again. Then, place the calibrator in the divided output (n/m)
mode once again.
4.7 Sweep Function
4.7
Sweep Function
The sweep function varies the output in a linear manner. For further
details, see Section 7.1, “Sweep Function.”
4.8
Auto Step Function
The auto step function varies the output in a step-by-step manner. For
further details, see Section 7.2, “Auto Step Function.”
4.9
Temperature Monitor Function
Using the
key, you can show the monitored temperature on the
LCD, as described below.
◆ When the Voltage, Current, Resistance or Pulse (Continuous
Pulse Train or Number of Pulses) Range Is Selected
The reading of a sourced signal remains changed to the temperature
detected by the built-in temperature sensor of the calibrator as long as
key is kept held down. Thus, you can monitor the room’s temthe
perature.
◆ When the Temperature (Thermocouple or RTD) Range Is Selected
key once allows you to monitor the electromotive
• Pressing the
force (mV) or resistance (Ω) equivalent to the preset temperature.
The monitored value does not reflect the correction made by the RJ
sensor.
key once again changes to the temperature de• Pressing the
tected by the RJ sensor connected to the calibrator or the internal
temperature of the calibrator.
key one more time reverts to the initial normal
• Pressing the
setting mode.
4-20
IM CA71-E
4.9 Temperature Monitor Function
TIP
• In approximately 10 seconds, the temperature monitor function automatically returns to the initial normal setting mode.
• The reading of internal temperature may become higher than the room’s temperature because of a temperature rise within the calibrator. With an external RJ sensor, it is possible to measure the room’s temperature more precisely.
• For a reading of monitored temperature, the unit symbol (mV, Ω or °C) blinks.
Thus, you can discriminate between a setpoint and a monitored value.
4
Source
IM CA71-E
4-21
5. Measurement
WARNING
● In an application where the calibrator is used together with the supplied lead
cables for measurement, the allowable voltage to ground of the input terminals is 300 V maximum. To avoid electrical shock, do NOT use the calibrator
at any voltage exceeding the maximum voltage to ground.
● The allowable voltage to ground when the supplied terminal adapter is attached to the input terminals is 30 Vpeak maximum. To avoid electrical shock,
do not use the terminal adapter for measuring any circuit voltage exceeding
the maximum voltage to ground.
TIP
5
key, you can hold the measured value.
• When no measurement needs to be made, turn off the MEASURE mode by pressing the
key. The measured value shown on the LCD disappears and
power to the internal measuring circuit is cut off. This strategy saves on battery
power.
• The reading of a measured value is updated at approximately one-second intervals. If the input is overranged, the measured value on the LCD reads as - - - - -.
IM CA71-E
5-1
Measurement
• With the
5.1 Connecting Cables to Terminals
5.1
Connecting Cables to Terminals
For DC voltage, AC voltage, resistance, frequency or pulse signal
Step 1: Connect the red lead cable for measurement (P/N: RD031) to
the H input terminal and the black lead cable to the L input
terminal.
Step 2: Connect the two clips of the cables to the measuring terminals of equipment under test while making sure the polarities
are correct.
For DC current signal
Step 1: Connect the red lead cable for measurement (P/N: RD031) to
the mA input terminal and the black lead cable to the L input
terminal.
Step 2: Connect the two clips of the cables to the measuring terminals of equipment under test while making sure the polarities
are correct.
For thermocouple signal (CA71 only)
Step 1: Connect the terminal adapter (P/N: 99021) to the input terminals. This will help you connect the cables easily.
Step 2: Connect between TC RTD terminals. The positive output
leadwire of the thermocouple to the H terminal of the terminal
adapter and the negative output leadwire to the L terminal.
For RTD signal (CA71 only)
Step 1: When using the terminal adapter (P/N: 99021), connect the H,
L and L terminals of the terminal adapter to the H, L and mA
terminals of the three-wire input terminal block of the calibrator, respectively.
Step 2: Connect the A, B and B output leadwires of the RTD to the H,
L and L terminals of the terminal adapter, respectively.
5-2
IM CA71-E
5.1 Connecting Cables to Terminals
CAUTION
• Before connecting the calibrator to the device under test, cut off the power
to the device.
• Do not apply any voltage or current exceeding the allowable voltage (300 V)
or current (120 mA). Otherwise, there will be a danger of not only damage to
the instrument but also personal injury due to electrical shock.
• Mistaking the H voltage input terminal for the mA current input terminal, and
vice versa, when wiring is extremely dangerous. NEVER make this mistake.
• The current input terminals are equipped with a built-in current input protection fuse. Overcurrent input to the terminals will cause the fuse to blow. If
the fuse is blown, replace it with one (P/N: A1501EF) with the specified ratings. For details on fuse replacement, see subsection 5.2.3, "Measuring DC
Current."
Measurement
IM CA71-E
Red
Black
Red
Lead cables for measurement
(RD031)
Black
Terminal adapter
(99021)
WARNING
The allowable voltage to ground when
the included terminal adapter is
attached to the input terminals is 30
Vpeak maximum.
5
5-3
5.2 Measuring 300 V AC-range Voltage, DC Voltage, AC Voltage or DC Current
5.2
5.2.1
Measuring 300 V AC-range Voltage, DC
Voltage, AC Voltage or DC Current
Measuring 300 V AC-range Voltage
CAUTION
If you make a mistake in wiring or in the operating procedure in this measurement task, there will be a danger of not only damage to the instrument but also
personal injury due to electrical shock. Exercise the utmost care when carrying out the measurement task.
Step 1: Make sure the lead cables for measurement are not connected to the measuring instrument under test.
.
Step 2: Using the function selector switch, select
Step 3: Connect the lead cables for measurement to the measuring
terminals of the measuring instrument under test.
5.2.2
Measuring DC or AC Voltage
Step 1: Using the function selector switch, select the measurement
,
and
.
function you want to use from
C
Step 2: Using the
key, select either DC or AC. The DC
AC symbol appears on the LCD.
5.2.3
or
Measuring DC Current
Step 1: Using the function selector switch, select
.
Step 2: Using the
key, select either 20 mA or 100 mA. The
decimal point of the measured value shown on the LCD is
repositioned.
5-4
IM CA71-E
5.2 Measuring 300 V AC-range Voltage, DC Voltage, AC Voltage or DC Current
◆ Replacing the Fuse
The current input protection fuse in the mA/3WIRE terminal is housed
inside the fuse holder (labeled FUSE) on one side panel of the calibrator. To replace the fuse, first remove the fuse holder labeled FUSE by
turning the holder counterclockwise with a flatblade screwdriver. Then,
replace the fuse and insert the fuse holder back in place. Fasten the
fuse holder by turning it clockwise. The replacement fuse is described
below.
Part Number
Rating
A1501EF
125 mA/250 V, fast-acting
5
Measurement
IM CA71-E
5-5
5.3 Measuring Resistance or RTD (CA71 only) Signal
5.3
Measuring Resistance or RTD (CA71 only)
Signal
Step 1: Using the function selector switch, select
.
Step 2: Using the
key, select the range. Pressing the key
cycles through the 400 Ω, Pt100 and JPt100 options.
TIP
• If you select the 400 Ω RTD range of the SOURCE mode at the same time, the
RTD selected on the SOURCE mode side precedes the one selected on the MEASURE mode side. Thus, you cannot select any RTD for the
range of the
MEASURE mode. (CA71 only)
• To carry out measurement based on three-wire connection, use the 3WIRE terminal.
5-6
IM CA71-E
5.4 Measuring Temperature with Thermocouple (TC) - CA71 only -
5.4
Measuring Temperature with Thermocouple (TC) - CA71 only NOTE
Use the terminal adapter in locations where any voltage higher than 30 V will
never be imposed on the measuring circuit.
Step 1: Using the function selector switch, select
.
Step 2: Using the
key, select the type of thermocouple. Pressing the key cycles through the 100 mV, K, E, J, T, R, B, S, N,
L and U options.
• If you select the 100 mV TC range of the SOURCE mode at the same time, the
thermocouple selected on the SOURCE mode side precedes the one selected on
the MEASURE mode side. Thus, you cannot select any thermocouple for the 100
mV TC range of the MEASURE mode.
• If there has been a sudden change in the operating ambient temperature of the
calibrator, wait until the built-in reference junction compensation stabilizes. Avoid
using the calibrator in locations exposed to wind from such apparatus as an airconditioner.
• If the thermocouple has burnt out, the LCD shows the
IM CA71-E
symbol.
5-7
Measurement
TIP
5
5.5 Measuring Frequency or Pulses
5.5
5.5.1
Measuring Frequency or Pulses
Operating the Calibrator for Frequency Measurement
Step 1: Using the function selector switch, select
.
key, select 100 Hz, 1000 Hz or 10 kHz.
Step 2: Using the
Pressing the key cycles through the 100 Hz, 1000 Hz, 10 kHz,
CPM and CPH options. Note however that the range reading
of the LCD is given as shown below (when no signal is
present).
LCD Reading
Range
100Hz
1000Hz
10kHz
5.5.2
Operating the Calibrator for Measuring Number
of Pulses
The CPM option in this measurement counts pulses per minute, while
the CPH option counts pulses per hour.
Step 1: Using the function selector switch, select
.
Step 2: Using the
key, select either CPM or CPH. Pressing the
key cycles through the 100 Hz, 1000 Hz, 10 kHz, CPM and
CPH options.
indicator turns on and the calibrator goes into a
Step 3: The
standby-for-counting state. The calibrator begins counting
pulses the moment the
state.
5-8
key is pressed to cancel the hold
IM CA71-E
5.5 Measuring Frequency or Pulses
NOTE
• If you press the
key after the completion of counting while the
indicator is lit, the calibrator restarts counting from 0.
• If you press the
key halfway before the selected time (one minute or one
hour) expires, the calibrator stops counting at that moment. The LCD shows
the number of pulses counted up to the moment.
• If the count exceeds the limit, the calibrator shows the maximum number
and stops counting.
• When counting pulses, the calibrator disables the automatic power-off feature.
TIP
IM CA71-E
5-9
5
Measurement
To measure contact input, switch to that measurement function with the DIP switch in
the battery holder. For further details, see Section 7.7, "Selecting the Contact In
Function (Contact Input for Pulse Measurement)."
6. Memory Functions
1.
3.
4.
Keys and labels related to memory function
IM CA71-E
6-1
Memory Functions
2.
The built-in memory has the following four functions. With a pair of
sourced and measured signal values in a set, the calibrator can handle
a maximum of 50 sets of data (hereinafter simply referred to as data) by
means of its built-in memory.
Saving to Memory (MEM SAVE)
You can save data to memory.
Reading from Memory (MEM READ)
You can show data in memory on the LCD. When data is being read
from memory, the source output remains turned off. Thus, you cannot
do any source task using data stored in memory.
Clearing Memory (MEM CLEAR)
You can clear data stored in memory.
Sending Data from Memory - CA71 only You can send data in memory to an external personal computer using
the communication function. This function requires use of the optional
RS232 communication cable (P/N: 91017). For further details, see
Chapter 8, "Communication Function."
6
6.1 Saving Data into Memory
6.1
6.1.1
Saving Data into Memory
Saving Data in the Order of Memory Numbers
Step 1: Press the
key. The
indicator on the LCD turns on.
At this point, the indicator shows a memory number immediately following the one most recently used to save data.
key saves the sourced and measured
Step 2: Pressing the
(currently on-display) signal values at that moment into the
area with that memory number (address). Executing the
MEM SAVE function cancels the state of selecting memory,
reverting to normal setting mode.
Step 3: To save the next data item into the area with the next memory
key once again. Now the MEM No.
number, press the
indicator shows a memory number one count larger than the
previous one.
key saves the sourced and measured
Step 4: Pressing the
(currently on-display) signal values at that moment into the
area with that memory number (address) – the previous
memory number (address) + 1.
TIP
To cancel the memory mode (saving/reading), press the
key one more time.
(Executing the MEM SAVE function automatically cancels the memory mode.)
6-2
IM CA71-E
6.1 Saving Data into Memory
ndicates the memory number with which data is already saved.
All these are not yet used.
(Case I)
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16
49 50
MEM No.07 Indication when selected
These are not yet used.
(Case II)
All these are not yet used.
Example of Key Operation
Press the
key.
Press the
Press the
key.
MEM No.14 Indication of the selection
Data is saved into the area with memory number
14 and the memory mode is cancelled.
key once again.
Press the
key six times.
Press the
key.
49 50
Memory Functions
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16
MEM No.15 Indication of the selection
MEM No.21 Indication of the selection
6
Data is saved into the area with memory number
21 and the memory mode is cancelled.
Working with the MEM SAVE Function
NOTE
• In memory mode, some of the
and
keys change to those for working
with memory. Consequently, you cannot do the regular task of setting output values for source.
• The MEM No. indicator begins with
if no data has been saved into memory.
If memory contains any saved data already, a memory number immediately
following the largest of the already used memory numbers is allocated to the
next data, as shown in the figure discussed above, even if there is any notyet-used memory address at some midpoint.
• In the case of the divided output function (n/m), the output value "setpoint
× n/m" for source is stored in memory.
IM CA71-E
6-3
6.1 Saving Data into Memory
6.1.2
Saving Data by Selecting Desired Memory Number
Step 1: Press the
key. The
Step 2: Using the pair of
number (address).
indicator on the LCD turns on.
key, select the desired memory
key saves the sourced and measured
Step 3: Pressing the
(currently on-display) signal values at that moment into the
area with the selected memory number (address).
TIP
To cancel the memory mode (saving/reading), press the
key one more time.
(Executing the MEM SAVE function automatically cancels the memory mode.)
6.1.3
Overwriting Data in Memory
Step 1: Press the
key.
Step 2: Using the pair of
number (address).
Step 3: Press the
key, select the desired memory
key. The LCD shows
Step 4: Pressing the
memory number.
to alert you.
key once again overwrites the data in that
Alarm indication for memory overwriting
6-4
IM CA71-E
6.1 Saving Data into Memory
NOTE
• To stop overwriting the data, press the
key one time. This cancels saving data, reverting to the original state of being able to save/read data to/
from memory.
TIP
6.2
Reading Data from Memory
Step 1: Press the
key once. The LCD shows MEM No. xx. At this
point, the MEM No. indicator shows a memory number immediately following the one most recently used to save data.
(Memory is ready for data saving.)
key causes the on-screen
indication
Step 2: Pressing the
to blink, indicating the calibrator is reading from memory.
key, select the memory number
Step 3: Using the pair of
whose data you want to read. The LCD shows the data thus
read out of memory. The items of the read data are shown on
their respective measured-value and generated-value display
areas. If the area with the memory number contains no saved
data, the LCD shows - - - - -.
TIP
• To cancel reading from the memory mode, press the
one more time.
key or the
key
• To save data anew while reading from memory, overwrite the existing data by
following step 2 in subsection 6.1.3, "Overwriting Data in Memory."
IM CA71-E
6-5
Memory Functions
To cancel the memory mode (saving/reading), press the
key one more time.
(Executing the MEM SAVE function automatically cancels the memory mode.)
6
6.3 Clearing Data in Memory
6.3
Clearing Data in Memory
6.3.1
Clearing Data by Selecting Desired Memory
Number
Step 1: Press the
turns on.
key once. The
indicator on the LCD
key, select the memory number
Step 2: Using the pair of
whose data you want to clear.
key causes the LCD to show the alarm indiStep 3: Pressing the
cation
(no.88 indicates object
)
Step 4: Pressing the
key once again clears the data with the selected memory number.
TIP
• To cancel clearing the data after the
alarm indication is given, press the
key. The calibrator reverts to memory mode (saving/reading).
• You can also clear the data after having read it from memory.
6-6
IM CA71-E
6.3 Clearing Data in Memory
6.3.2
Clearing All In-Memory Data Globally
Step 1: Press the
turns on.
key once. The
Step 2: Hold down the
shows the
indicator on the LCD
key for at least five seconds. The LCD
alarm indication.
key once again clears all of the data in
Memory Functions
Step 3: Pressing the
memory.
ALL CLEAr alarm indication
TIP
6
• To cancel clearing the data after the
alarm indication is given, press the
key. The calibrator reverts to memory mode (saving/reading).
6.4
Sending Out Data from Memory - CA71
only See Chapter 8, "Communication Function."
IM CA71-E
6-7
7. Functions Provided by DIP Switch
By configuring the DIP switch, you can use the functions listed below.
The DIP switch can be found by removing the battery holder cover at
the back of the calibrator.
Turn off the calibrator before you change the DIP switch configuration.
Factory Setting
DIP Switch
Position
Description
1 Sweep
Selects the sweep or auto-step function.
2 Speed
Changes the speed setpoint of the sweep or auto-step function.
3 INT RJ
Selects the internal reference junction compensation for TC signal
generation.
4 IPTS-68
Selects the IPTS-68 temperature scale for temperature signal
generation or measurement.
5 No use
Denotes the position is not used.
6 Temp
OFF
7 Contact In
Selects contact input based operation for pulse measurement.
8 Auto P off
Cancels the automatic power-off feature during battery-driven
operation.
OFF
ON
(left-side) (right-side)
7
OP
EN
ON
1 2 3 4 5 6 7
DIP switch
IM CA71-E
Functions Provided by DIP Switch
CAUTION
7-1
7.1 Sweep Function
7.1
Sweep Function
The sweep function lets you linearly change the calibrator output as
shown in the following figure.
The SOURCE ON
indication blinks.
The SOURCE OFF
indication blinks.
Setpoint
Sourced-value
reading
Actual output
OFF
SOURCE ON
key operation Press
(ON)
OFF
0
Press
When the SOURCE ON key is
pressed at midpoints during a
change in the output.
OFF
SOURCE ON
key operation Press
(ON)
Sweep Mode Operation
Step 1: Press the
Press
Press
key to turn off the calibrator.
Step 2: Place switch 1 (Sweep switch) in the ON (right-side) position.
Step 3: By setting the position of switch 2 (Speed switch), change the
sweep speed.
OFF (left-side): 16 sec; ON (right-side): 32 sec
Step 4: Press the
.
key to turn on the calibrator. The LCD shows
Step 5: Using the function selector switch, select the function (voltage, current, resistance, thermocouple, or RTD) for which you
want to source a signal. In the case of pulse source, the
sweep function is disabled.
7-2
IM CA71-E
7.1 Sweep Function
Step 6: Using the pair of
and
keys, set the upper limit of the
signal to be output. The lower limit is set to a value predetermined depending on the selected range.
key once again causes the output value to
Step 8: Pressing the
begin decreasing. The output value decreases down to the
lower limit in the same amount of time it took to increase up to
the upper limit. When the output reaches the lower limit, the
calibrator retains the output as is for approximately three seconds, and then automatically turns it off. Thus, one cycle of
sweeping is completed.
Step 9: To quit the sweep function, turn off the calibrator by pressing
key.
the
Step 10: Place switch 1 back in the OFF (left-side) position to disable
the sweep function.
NOTE
• When the output reaches the lower limit, the calibrator retains the output as
is for three seconds, and then turns it off. Thus, one cycle of sweeping is
completed.
• To alter the direction in which the output changes, press the
key when
sweeping is in progress (LCD reading is changing). The calibrator alters the
direction of change and continues sweep operation. For example, pressing
the
key during an increase in the output causes the output to begin
decreasing.
IM CA71-E
7-3
Functions Provided by DIP Switch
key initiates sweeping and the output value
Step 7: Pressing the
begins to increase.
and the lower limit (default) for
• The LCD shows
approximately two seconds. The calibrator outputs the default.
• Then, the LCD reading and the output value begin to increase in fixed increments, up to the upper limit, in the
sweep time set in the preceding steps.
• When the output reaches the setpoint, the calibrator retains the output as is, and automatically holds sweep operation.
7
7.2 Auto Step Function
7.2
Auto Step Function
The auto step function automatically changes the variable n of the n/m
output in a step-by-step manner, as shown in the following figure, when
the divided output function (n/m) is selected.
Sourced-value reading
m
Setpoint
3
n
2
Actual output
3
1
2
2
1
OFF
Stepping time setpoint
SOURCE ON
key operation Press
(ON)
Auto Step Operation (when the default of n is set to 1)
Step 1: Press the
0
key to turn off the calibrator.
Step 2: Place switch 1 (Sweep switch) in the ON (right-side) position.
Step 3: By setting the position of switch 2 (Speed switch), set the time
of one step.
OFF (left-side): 2.5 sec/step; ON (right-side): 5 sec/step
Step 4: Press the
key to turn on the calibrator.
Step 5: Using the function selector switch, select the function (voltage, current, resistance, thermocouple, or RTD) for which you
want to source a signal. In the case of pulse source, the auto
step function is disabled.
Step 6: Set the output value.
key. The
indication on the LCD changes
Step 7: Press the
and the n/m symbol turns on.
to
7-4
IM CA71-E
7.2 Auto Step Function
Step 8: Using each pair of
and
keys, set the value of the denominator m and the starting setpoint of the enumerator n.
(See Section 4.6, "Divided Output Function (n/m), for further
details.) The starting setpoint is the minimum of the variable n
for auto step operation.
Step 10: To quit the auto step function, turn off the calibrator by presskey. Place switch 1 back in the OFF (left-side)
ing the
position. Note that disabling the divided output mode (n/m)
before placing switch 1 back in the OFF position enters
sweep mode.
TIP
• Pressing the
operation.
7
key to change to the SOURCE OFF state pauses the auto step
• To execute the auto step function again, press the
tion resumes from the value of n shown on the LCD.
IM CA71-E
Functions Provided by DIP Switch
Step 9: Pressing the
key initiates the automatic stepping of the
divided output (n/m), as described below.
Assuming the starting value of the variable n is 1, the output
cyclically changes with the variable n as n changes in the following manner.
n = 1 → 2 → 3 → · · · (m – 1) → m → (m – 1) → · · · → 2 → 1
→2→3→···
key. The auto step opera-
7-5
7.3 Selecting the INT RJ Function
7.3
Selecting the INT RJ Function
The INT RJ function provides reference junction compensation for
thermoelectromotive force source in a simplified manner by means of
the calibrator's built-in temperature sensor. For more precise reference junction compensation, it is advisable that you use the optional RJ
sensor (P/N: B9108WA).
Step 1: Press the
key to turn off the calibrator.
Step 2: Place switch 3 (INT RJ switch) in the ON (right-side) position.
The calibrator detects temperature using its built-in temperature sensor and outputs reference junction-compensated
thermoelectromotive force appropriate for the detected temperature.
Step 3: To disable the INT RJ function, turn off the calibrator by
key.
pressing the
Step 4: Place switch 3 back in the OFF (left-side) position.
TIP
Even when the INT RJ function is selected, the temperature detected by an external
RJ sensor precedes any other measured temperature if you plug the sensor into the
RJ INPUT connector.
7.4
Selecting the IPTS-68 Function
By placing switch 4 (IPTS-68 switch) in the ON (right-side) position, you
can select the IPTS-68 temperature scale when you choose the type-K,
E, J, T, N, R, S or B thermocouple or the Pt100 RTD. Placing the
switch in the OFF position results in the selection of the ITS-90 temperature scale.
TIP
When you have selected a type of thermocouple or RTD, the LCD shows IPTS-68.
7-6
IM CA71-E
7.5 Switch Not Used
7.5
Switch Not Used
Although switch 5 (No Use switch) of the DIP has no effect on calibrator
operation, the switch should be placed in the OFF (left-side) position.
Temp Switch
Check that the switch should be placed in the OFF position.
7.7
Selecting the Contact In Function
(Contact Input for Pulse Measurement)
By placing switch 7 (Contact In switch) in the ON (right-side) position,
you can measure transistor contact on-off signals. If you select the
(contact) symbol appears on the LCD.
contact input function, the
By placing the switch in the OFF position, you can measure normal
pulse.
7.8
Disabling the Automatic Power-off Feature
By placing switch 8 (Auto P Off switch) in the ON (right-side) position,
you can disable the automatic power-off feature and continue using the
calibrator. (See the paragraph "Automatic Power-off" in Chapter 3,
"Before Starting Source/Measurement," for further details.)
NOTE
If you have disabled the automatic power-off feature, be sure to turn off the
POWER switch when you finish using the instrument in order to prevent unusual battery power consumption.
IM CA71-E
7-7
Functions Provided by DIP Switch
7.6
7
8. Communication Function - CA71 only You can configure the calibrator from a personal computer just as you
do with the calibrator's panel keys (except for turning on/off the power,
configuring the function selector switch, and setting the communication
function). You can also verify the setpoint, measured value and status
of the calibrator.
NOTE
• With the optional communication cable (P/N: 91017), you can use the RS232
serial port (9-pin D-sub) of a personal computer or any other equipment.
8.1
Cables Connection and Interface Specifications
◆ Connecting Communication Cable
Remove the I/O port cover at the back of the calibrator and connect the
communication cable (P/N: 91017) to the I/O port.
◆ Setting RS232 Parameters
Baud rate:
9600 baud
Parity:
None
Stop bits:
2
Data length:
8 bits
Flow control:
None (Xon/Xoff control for printing only)
Delimiter:
Fixed to CrLf
IM CA71-E
Communication Function
• In talk-only or printer mode, you can output the source setpoint and measured value at preset intervals.
8
8-1
8.2 Setting the Mode
8.2
Setting the Mode
Step 1: Press the
key while simultaneously holding down the
key. The LCD shows
in its upper section and either
or
in its lower section.
Step 2: Using the pair of
and
keys, select
,
or
,
.
Step 3: Press the
key to confirm your mode selection. If you set
or
, the LCD shows
. When the
the mode to
is indicated, each press of the
key outputs one
data item.
and
keys with
Step 4: If you set any value using the pair of
shown, the calibrator outputs data using the value thus
set as the time interval (sec). The value should be set within
the range from 0 to 3600.
TIP
• To close the communication setting screen, press the
simultaneously holding down the
key.
key once again while
• Even if you turn off the calibrator, the communication mode and interval you have
set are saved internally until you replace the batteries or reconfigure the communication function. Thus, communication will take place with the previous settings.
8.3
Types of Mode
:
Normal mode –
Permits normal transmission and reception.
: Talk-only mode – Outputs the source setpoint and measured
value at preset intervals (0* to 3600 sec).
: Printer mode –
Outputs the source setpoint and measured
value to a printer at preset intervals (0* to
3600 sec).
key outputs one data
*: For a 0-second interval, each press of the
key initiates or terminates
item. For other intervals, pressing the
communication.
8-2
IM CA71-E
8.4 Data Format
TIP
When communication is in progress, the
indicator blinks, telling you data is
being output. Care must be taken therefore, since the hold function of the MEASURE
or
.
mode is disabled if you select
8.4
Data Format
8.5
Data Structure
The calibrator's program has the following data structure.
Command + Parameter + Delimiter
Command: Defined by one to three alphabetical upper-case letters.
Parameter: A string of ASCII-code numerals or characters.
Delimiter: Fixed to CrLf.
IM CA71-E
8-3
Communication Function
Data is output from the calibrator in the following format.
Source:
Function
1V
Range
DC V
Data
1.0000
Measure:
Function
100 mV
Range
k
Data
25.5C
8
8.6 Commands
8.6
8-4
Commands
BL
Turns the back lighting on and off /queries the current setting.
DW
Moves down the “m-th” digit of the sourced setpoint by one digit.
UP
Moves up the “m-th” digit of the sourced setpoint by one digit.
H
Enables/Disables the output data header /queries the current setting.
HD
Enables/Disables data hold mode/queries the current setting.
MF
Queries the measurement function.
MO
On/Off of measurement/queries the current setting.
MR
Sets the measuring range/queries the current setting.
OD
Outputs measured value.
OE
Outputs error information.
OR
Queries whether an external RJC sensor is connected.
OS
Outputs the setting information.
SD
Sets sourced setpoint/queries the current setting.
SF
Queries the source function.
SO
On/Off of source output/queries the current setting.
SR
Sets the sourcing range/queries the current setting.
SY
Switches between the normal and adjustment modes/queries the current setting.
CD
Sets the sourced setpoint/queries the current setting.
CL
Sets the adjustment item/queries the current setting.
CP
Sets the adjustment point.
CW
Saves the adjusted data.
CMF
Queries the measurement function.
CSF
Queries the source function.
OM
Queries memory data.
NM
Sets divided output (n/m) mode/queries the current setting.
ND
Sets n/m values in divided output (n/m) mode/queries the current setting.
TE
Sets the temperature monitor display for sourced TC/RTD range/
queries the current setting. (TC, RTD mode only)
PU
Sets the display for sourced pulse range/queries the current setting.
IM CA71-E
8.7 Detailed Description of Commands
8.7
Detailed Description of Commands
BL
Turns the back lighting on and off /queries the
current setting.
Syntax for setting
BLm<delimiter>
Syntax for query
BL?<delimiter>
⇒
Description of parameter
m=0: Off
DW
When normal
condition
Response: BLm<delimiter>
m=1: On
Moves down the “m-th” digit of the sourced setpoint
by one digit.
When normal
condition
Syntax for setting
DWm<delimiter>
UP
1 (the lowest digit) to 5 (the highest digit)
Moves up the “m-th” digit of the sourced setpoint by
one digit.
When normal
condition
Syntax for setting
UPm <delimiter>
Description of parameter
m: Specifies a digit
H
1 (the lowest digit) to 5 (the highest digit)
Enables/Disables the output data header/queries the
current setting.
When normal
condition/adjustment
Syntax for setting
Hm<delimiter>
Syntax for query
H?<delimiter>
⇒
Response: Hm<delimiter>
* For details on the header, see the OD command.
Description of parameter
m: Enables/Disables the header
m=0: Disabled
m=1: Enabled
Enables/Disables data hold mode/queries the current
setting.
Syntax for setting
HDm<delimiter>
Syntax for query
HD? <delimiter> ⇒
Response: HDm (delimiter)
Description of parameter
m: Specifies data hold
m=0: Hold Off
m=1: Hold On
HD
IM CA71-E
Communication Function
Description of parameter
m: Specifies a digit
8
When normal
condition
8-5
8.7 Detailed Description of Commands
MF
Syntax for query
MF? <delimiter> ⇒
Response: MFm<delimiter>
Description of parameter
m: Measurement function
m=0: 300V AC
m=1: 100V
m=3: 1V
m=4: 100mV
m=6: Frequency
m=7: Current
MO
m=2: 10V
m=5: Resistance
On/Off of measurement/queries the current setting.
Syntax for setting
MOm<delimiter>
Syntax for query
MO?<delimiter> ⇒
Description of parameter
m: On/Off condition
m=0: Off
MR
When normal
condition/adjustment
Response: MOm <delimiter>
m=1: On
Sets the measuring range/queries the current
setting.
Syntax for setting
MRm<delimiter>
Syntax for query
MR? <delimiter> ⇒ Response: MRm<delimiter>
Description of parameter
m: Measuring range
[100V]
m=0: DC
m=1: AC
[10V]
m=0: DC
m=1: AC
[1V]
m=0: DC
m=1: AC
[100mV] (When normal condition)
m=0: 100mV DC
m=1: TcK
m=3: TcJ
m=4: TcT
m=6: TcB
m=7: TcS
m=9: TcL
m=10: TcU
[100mV] (When adjustment)
m=0: 100mV DC
m=1: TcK
m=4: TcT
[Ω]
m=0: 400 Ω
m=1: Pt100
[Freq ]
m=0: 100Hz
m=1: 1kHz
[mA]
m=0: 20mA
m=1: 100mA
8-6
When normal
condition
Queries the measurement function.
When normal
condition/adjustment
m=2: TcE
m=5: TcR
m=8: TcN
m=2: TcE
m=2: JPt
m=2: 10kHz
IM CA71-E
8.7 Detailed Description of Commands
OD
Outputs measured value.
When normal
condition/adjustment
Syntax for setting
OD<delimiter>
⇒ Response: ODabcde<delimiter>
Description of parameter
<Header section> (Output only when the header is set to “enabled”.)
a= V: Voltage A: Current
O: Resistance T: Temperature F: Frequency
b= DC: Direct current
AC: Alternating current
c= N: Normal O: Overrange
E: No data
<Data section>
d = Measured value, mantissa part (7 digits)
e = Measured value exponent part (E - 3 / E+0 / E+3)
de = 99999. E+3 when overrange occurs or no data reside.
OE
Outputs error information.
When normal
condition/adjustment
OR
Queries whether an external RJC sensor is
connected.
When normal
condition
Syntax for query
OR<delimiter>
⇒ Response: m
Description of parameter
m: Connecting condition of external RJC
m=0: Not connected
m=1: Connected
OS
Outputs the setting information.
Syntax for setting
OS<delimiter>
Response
Measure m<CrLf>
Function m<CrLf>
Range m<CrLf>
Source m<CrLf>
Function m<CrLf>
Range m<CrLf>
Data m<CrLf>
Light m<CrLf>
IM CA71-E
Communication Function
Syntax for setting
OE<delimiter>
⇒ Response: ERRm<delimiter>
Description of parameter
m: Error information
m=00: No error
m=11: Received command not used in this instrument
m=12: Specified parameter value is outside allowed range.
m=13: Attempt made to execute a command that is not permitted in a certain
status of the instrument.
m=16: An error was received during adjustment.
8
When normal
condition
m= On/Off
m= Measurement function
m= Measuring range
m= On/Off
m= Source function
m= Source range
m= Sourced setpoint
m= On/Off
8-7
8.7 Detailed Description of Commands
SD
Sets sourced setpoint/queries the current setting.
When normal
condition
Syntax for setting
SDm<delimiter>
Syntax for query
SD?<delimiter> ⇒ Response: SDm<delimiter>
Description of parameter
m: Sourced setpoint (7 digits) ex. +1.0000
SF
Syntax for query
SF? <delimiter> ⇒ Response: SFm<delimiter>
Description of parameter
m: Function
m=0: 30V
m=1: 10V
m=2: 1V
m=4: Resistance m=5: Pulse m=6: 20mA
m=8: 20mASINK
SO
When normal
condition
Queries the source function.
m=3: 100mV
m=7: 4 to 20mA
On/Off of source output/queries the current setting.
When normal
condition/adjustment
Syntax for setting
SOm<delimiter>
Syntax for query
SO? <delimiter> ⇒ Response: SOm <delimiter>
Description of parameter
m: Condition of generation
m=0: Off
m=1: On
SR
Sets the sourcing range/queries the current
setting.
Syntax for setting
SRm<delimiter>
Syntax for query
SR?<delimiter> ⇒ Response: SRm<delimiter>
Description of parameter
m: sourcing range
[100mV] (When normal condition)
m=0: DC 100mV
m=1: TcK
m=3: TcJ
m=4: TcT
m=6: TcB
m=7: TcS
m=9: TcL
m=10: TcU
[100mV] (When adjustment)
m=0: DC 100m V
m=1: TcK
[Ω]
m=0: 400Ω
m=1: Pt100
[Freq ]
m=0: 500Hz
m=1: 1kHz
8-8
When normal
condition/adjustment
m=2: TcE
m=5: TcR
m=8: TcN
m=2: JPt
m=2: 10kHz
IM CA71-E
8.7 Detailed Description of Commands
SY
Switches between the normal and adjustment
modes/queries the current setting.
When normal
condition/adjustment
Syntax for setting
SYm<delimiter>
Syntax for query
SY ?<delimiter> ⇒ Response: SYm<delimiter>
Description of parameter
m: Mode
m=0: Normal mode
m=1: Adjustment mode
CD
Sets the sourced setpoint/queries the current
setting.
Response: DCm<delimiter>
m: Sourced setpoint (8 digits)
CL
ex. +1.00003
Sets the adjustment item/queries the current
setting.
When adjustment
Syntax for setting
CLm <delimiter>
Syntax for query
CL?<delimiter> ⇒ Response: CLm <delimiter>
Description of parameter
m: Adjustment item
m=3: Adjustment of source
m=4: Adjustment of measurement
CP
Sets the adjustment point.
When adjustment
8
Syntax for setting
CPm <delimiter>
Description of parameter
m: Adjustment point
m=0: FS adjustment
CW
m=1: Zero adjustment
Saves the adjusted data.
When adjustment
Syntax for setting
CW<delimiter>
Be sure to execute CW command after adjustment for each function/range.
Without executing CW command, the adjusted value will be deleted when the
power is turned off.
IM CA71-E
Communication Function
Syntax for setting
CDm<delimiter>
Syntax for query
DC? <delimiter> ⇒
Description of parameter
When adjustment
8-9
8.7 Detailed Description of Commands
CMF
Queries the measurement function.
Syntax for query
CMF?<delimiter>
⇒
Response: CMFm<delimiter>
Description of parameter
m: Measurement function
m=0: AC 300V
m=1: 100V
m=3: 1V
m=4: 100mV
m=6: Frequency
m=7: Current
CSF
⇒
Description of parameter
m= Function
m=0: 30V
m=4: Resistance
m=8: 20mASINK
OM
m=2: 10V
m=5: Resistance
Queries the source function.
Syntax for query
CSF?<delimiter>
When adjustment
When adjustment
Response: CSFm<delimiter>
m=1: 10V
m=5: Pulse
m=2: 1V
m=6: 20mA
m=3: 100mV
m=7: 4-20mA
Queries memory data.
Syntax for query
OMm<delimiter>
Response:
abcde, fghij [, fghij ] <delimiter>
<Header section of measured value>
a= V: Voltage A: Current
O: Resistance T: Temperature
b= DC: Direct current
AC: Alternating current
c= N: Normal O: Overrange
E: No data
<Data section of measured value>
d = Measured value, mantissa part (7 digits)
e = Measured value exponent part (E - 3 / E+0 / E+3)
<Header section of sourced setpoint>
f= V: Voltage A: Current
O: Resistance T: Temperature
g= DC: Direct current
AC: Alternating current
h= N: Normal E: No data
i = Sourced setpoint, mantissa part (7 digits)
j = Sourced setpoint exponent part (E - 3 / E+0 / E+3)
Description of parameter
m: Number of memory 1 to 50
8-10
When normal
condition
F: Frequency
F: Frequency
IM CA71-E
8.7 Detailed Description of Commands
NM
Sets divided output (n/m ) mode/queries the current
setting.
Syntax for setting
MNm<delimiter>
Syntax for query
MN?<delimiter> ⇒
Description of parameter
m: n/m mode
m=0: Off
ND
When normal
condition
Response: MNm<delimiter>
m=1: On
Sets n/m values in divided output (n/m ) mode/
queries the current setting.
When normal
condition
TE
Sets the temperature monitor display for sourced
TC/RTD range/queries the current setting.
(TC, RTD mode only)
When normal
condition
Syntax for setting
TEm<delimiter>
Syntax for query
TE?<delimiter>
⇒ Response: TEm <delimiter>
Description of parameter
m: Condition of display
m=0: Value of temperature
m=1: Value of equivalent voltage (resistance)
m=2: Reference junction temperature
PU
Sets the display for source pulse range/queries
the current setting.
8
When normal
condition
Syntax for setting
PUm<delimiter>
Syntax for query
PU?<delimiter> ⇒ Response: PUm<delimiter>
Description of parameter
m: Condition of display
m=0: Frequency
m=1: Pulse width
m=2: Pulse number
IM CA71-E
Communication Function
Syntax for setting
NDnm <delimiter>
Syntax for query
ND?<delimiter> ⇒ Response: NDnm <delimiter>
Description of parameter
n: n-value (2 digits among numbers from 00 to 19, where n ≤ m)
m: m-value (2 digits among numbers from 01 to 19, where n ≤ m)
8-11
9. Troubleshooting
■ Failure Checklist
Troubleshoot the cause of any problem using the following checklist.
Should the problem persist even if you have taken the given corrective
action or if you notice any problem not listed herein, contact the vender
from which you purchased the instrument.
Problem
Corrective Action
The LCD shows nothing even if – When the calibrator is operated on batteries
the POWER switch is turned on.
• Make sure the batteries are securely housed in
the holder.
• Check if the batteries are too low.
• Check if the AC adapter plug is inserted to the
calibrator but the adapter is not connected to
the AC power source.
– When the calibrator is operated on AC adapter
• Check if the AC adapter is reliably supplied with
electricity.
The output cannot be turned on • The built-in fuse may blow off if any abnormal
voltage level is applied to the output terminals.
for signal source, or no signal is
If this is the case, the calibrator needs repair.
output even if the output is
turned on.
The measured and sourced sig- • Check if the signal carries noise.
• When in resistance signal source, check if the
nal values are abnormal.
input stage of the device under test contains a
capacitor with an excessively large capacitance.
The calibrator cannot be config- • Make sure the communication parameter settings are correct.
ured or controlled via RS232 interface-based communication.
The hold function of the MEA- • Check if the communication mode is set to
tonLy or Print.
SURE mode does not work at
all.
The LCD shows Err60 at power- • The calibrator needs repair.
on.
IM CA71-E
9-1
Troubleshooting
The LCD shows everything except • Check if the MEASURE OFF key for turning on/
for the measured value.
off the MEASURE mode is set to OFF.
The SOURCE indicator remains • When in voltage signal source, check if the
set to OFF even if the SOURCE
load current is beyond the specified limits.
ON key is operated for signal • When in current signal source, check if the load
source.
resistance is too large.
9
10. Method of Calibrator Adjustment
To maintain the calibrator at high accuracy levels, it is advisable that
the calibrator be calibrated once a year. If the calibrator needs to be
readjusted, follow the procedure described below. For a service of calibration or readjustment, contact the vender from which you purchased
the instrument.
10.1 Calibration Standard Selection and Environmental Requirements
◆ Selection of Calibration Standard
Select an appropriate calibration standard having the ranges shown in
the following table and accuracy levels equal to or higher than those
shown in the table.
Function
to Be
Adjusted
DCV
DCA
SINK
Ω/1 mA
Ω/5 mA
IM CA71-E
Range
Standard’s
to Be
Name
Adjusted
100 mV
1V
Digital multimeter 10 V
30 V
(DMM)
20 mA
Note:
Also use a 100 Ω
standard resistor
for the DCA and 20 mA
SINK functions
and a highprecision 5 mA
400 Ω
current source
for the Ω/5 mA
function.
400 Ω
Measuring
Range
Accuracy
Remarks
110 mV
1.1 V
11 V
33 V
±(0.002% + 1.5 µV)
±(0.002% + 10 µV)
±(0.002% + 100 µV)
±(0.002% + 1 mV)
22 mA
±(0.002% + 0.3 µA)
20 mA
±(0.002% + 0.3 µA)
440 Ω
DMM’s resistance range
±(0.0025% + 0.01 Ω) (1 mA)
2.2 V/5 mA
Measure the current with
the DMM’s mA range or
measure the voltage
drop across the 100 Ω
standard resistor with the
DMM’s voltage range.
±(0.0025%)
High-precision current
source (5 mA)
±(0.0025%)
DMM’s voltage range
10-1
Method of Calibrator Adjustment
Source Functions
10
10.1 Calibration Standard Selection and Environmental Requirements
Measurement Functions
Function
to Be
Adjusted
Ω
Standard’s Range Measuring
to Be
Range
Name
Adjusted
100 mV 100 mV
1V
1V
10 V
High-precision 10 V
30 V
30
V
calibrator
20 mA
20 mA
100 mA 100 mA
Decade
400 Ω
–
resistance box
ACV
AC calibrator
or AC voltage
source
DCV
DCA
1V
10 V
100 V
300 V
1V
10 V
100 V
300 V
Accuracy
Remarks
±(0.0025% + 1 µV)
±(0.0025% + 20 µV)
±(0.0025% + 0.2 mV)
±(0.005% + 2 mV)
±(0.0025% + 0.4 µA)
±(0.004% + 3 µA)
±(0.01%)
±(0.08% + 0.015%)
◆ Environmental Requirements
Ambient temperature: 23 ±1°C
Relative humidity:
45 to 75%
Warm-up:
Before use, warm up the calibration standard
for the period of time specified for the standard.
The
indicator blinks when
any source function is being operated.
Auxiliary-digit indicator
(The value should be read as 400.000.)
CAL mode indicator
0 denotes zero-point
adjustment and FS
denotes full-scale
adjustment.
Key for
confirming/saving
adjustment value
Keys for switching
between the
measurement and
source CAL modes.
Keys for adjusting the
setpoint value of source
Keys for selecting/canceling
CAL mode
(Press in combination.)
Keys for adjusting the two digits,
including the auxiliary digit
CAL-mode Operation keys and Display Indications
10-2
IM CA71-E
10.2 Adjusting Source Functions
10.2 Adjusting Source Functions
Table 10.1 Adjustment Points of Source Functions
Adjustment Points*1
Range
Remarks
CAL 0
CAL FS
100 mV
0
100 mV
1V
0
1V
10 V
0
10 V
30 V
0
30 V
20 mA
0
20 mA
See the figure below.
20 mA SINK
0.1 mA
20 mA
See the figure below.
400 Ω/1 mA
0
400 Ω
Four-wire connection
400 Ω/5 mA
0
400 Ω
See the figure below.
*1: Adjust the source functions so that the readings of the calibration standard
(output values of the CA51/71) match the adjustment points listed above.
TIP
• Always make zero-point (0) adjustments together with full-scale (FS) adjustments.
CA71
20 mA output
Standard resistor
SINK
100 Ω
H
DMM
L
Voltage range
20mA
SINK
H
24V
L
CA71
H
DMM
L
Voltage range
5mA
Power
supply
20 mA and SINK ranges
High-precision
current source
400 Ω/5mA
Hook-ups for Adjustment
Step 1: Press the
key while simultaneously holding down the
key. The LCD shows
.
key enters the source CAL mode. The
Step 2: Pressing the
indicator blinks on the LCD and the
symbol appears. The calibrator is now ready for the zero-point adjustment of source functions.
Step 3: From Table 10.1, select the range you want to adjust. Then,
point the function selector switch to that range and press the
key.
IM CA71-E
10-3
Method of Calibrator Adjustment
• You can also select only the range in need of readjustment to adjust it separately.
10
10.2 Adjusting source Functions
Step 4: Conform that the
symbol is appearing on the LCD.
Step 5: Read the calibrator output on the calibration standard. Then,
and
keys, adjust the readusing the lowest-order pair of
ing so that it matches the given CAL 0 adjustment setpoint in
and
Table 10.1. In the CAL mode, the lowest-order pair of
keys are used to increase or decrease the least-significant
two digits, including the auxiliary digit. Adjust the value measured with the calibration standard to the given adjustment
setpoint in Table 10.1.
key to confirm the CAL 0 adjustment setpoint.
Step 6: Press the
The CAL indicator on the LCD changes to , setting the calibrator ready for full-scale adjustment.
and
keys, adjust the
Step 7: Using the lowest-order pair of
reading of the calibration standard so that it matches the
given CAL FS adjustment setpoint in Table 10.1.
key to confirm the CAL
Step 8: Press the
FS adjustment setpoint. The 0 and FS
symbols on the LCD blink.
once again saves the
Step 9: Pressing the
adjustment setpoint in memory.
Step 10: The 0 and FS symbols stop blinking, causing the calibrator to
return to the state discussed in step 4. Using the function
selector switch, select the next range. By repeating steps 4 to
9, you can adjust the source function assigned to that range.
NOTE
• Saving to memory results in the overwriting of existing data. Be extremely
careful since the previous adjustment setpoints are cleared.
• Both the thermocouple and RTD ranges are adjusted at the same time when
the 100 mV and 400 Ω ranges are adjusted.
10-4
IM CA71-E
10.2 Adjusting source Functions
TIP
With the CAL mode selected, press the
key while holding down the
key. This
key operation cancels the CAL mode (the same key operation as for selecting the
CAL mode). You can use the same key operation to cancel the CAL mode during
adjustment, before saving to memory.
CAUTION
– Precautions when adjusting the 400 Ω range for resistance signal source
(1) Internal Offset Adjustment
When setting a resistance of 0.00 Ω , make sure the voltage between the H
and L terminals is within ±20 µV. If the voltage is beyond the limits, internal
adjustments must be made. Contact the vender from which you purchased
the instrument.
(2) Notes on Resistance-measuring Current
Adjustment for 1 mA
This adjustment is possible with the resistance measuring range of
the calibration standard (digital multimeter). At this point, make sure
the resistance-measuring current is 1 mA.
Adjustment for 5 mA
Like the method of adjusting the 400 Ω/5 mA range shown in the figure (Hook-ups for Adjustment) on page 10-3, you can make this adjustment by applying the reference current of 5 mA from the external
device and then measuring the resulting voltage drop.
Method of Calibrator Adjustment
Adjusting the 400 Ω range requires drawing two types of resistance-measuring current – 1 mA and 5 mA – from an external device. Adjust the
range separately for each of these currents.
10
IM CA71-E
10-5
10.3 Adjusting Measurement Functions
10.3 Adjusting Measurement Functions
Table 10.2 Adjustment Setpoints of Measurement Functions
Range
Adjustment Setpoint*2
CAL 0
Remarks
CAL FS
DC 100 mV
–
100 mV
DC 1 V
–
1V
DC 10 V
–
10 V
DC 100 V
–
100 V
DC 20 mA
–
20 mA
DC 100 mA
–
100 mA
400 Ω
0Ω
380 Ω
AC 1 V
0V
1 V/50-60 Hz
AC 10 V
0V
10 V/50-60 Hz
AC 100 V
0V
100 V/50-60 Hz
AC 300 V
0V
300 V/50-60 Hz
Three-wire connection
*2: Apply the reference input signals listed above from the calibration standard.
TIP
• You can also select only the range in need of readjustment to adjust it separately.
• Always make zero-point (0) adjustments together with full-scale (FS) adjustments.
10.3.1 Adjusting DC Voltage and DC Current Ranges
Step 1: Press the
key while simultaneously holding down the
key. The LCD shows
Step 2: Pressing the highest-order
.
.
key causes the LCD to show
key enters the measurement CAL mode.
Step 3: Pressing the
The
indicator blinks on the LCD and the
symbol
appears. The calibrator is now ready for the defining the CAL
FS setpoint of measurement functions.
CAL-mode Operation Keys and Display Indications
10-6
IM CA71-E
10.3 Adjusting Measurement Functions
Step 4: Apply the CAL FS adjustment setpoint input of each range in
Table 10.2 from the calibration standard to the H and L input
terminals of the calibrator.
key confirms the CAL FS adjustment
Step 5: Pressing the
symbol blinks.
setpoint. At this point, the
Step 6: Pressing the
memory.
once again saves the adjustment setpoint in
NOTE
• Range adjustments are made automatically within the calibrator so that the
LCD reading matches the adjustment setpoint in question given in the table
with reference to the input applied as described above. Therefore, you need
not make any range adjustment with
and
keys.
Step 7: The
symbol stops blinking, causing the calibrator to return
to the state discussed in step 4. Using the function selector
switch, select the next range. By repeating steps 4 to 6, you
can adjust the measurement function assigned to that range.
TIP
Press the
key while holding down the
key. This key operation cancels the
CAL mode. You can use the same key operation to cancel the CAL mode during
calibration, before saving to memory.
When adjusting DC current range, using the
mA.
key, change DC 20 mA ➝ DC 100
Method of Calibrator Adjustment
• Saving the adjustment setpoint results in the overwriting of existing data.
Be extremely careful since the previous adjustment setpoints are cleared.
10
IM CA71-E
10-7
10.3 Adjusting Measurement Functions
10.3.2 Adjusting AC Voltage and Resistance (400 Ω)
Ranges
Step 1: Press the
key while simultaneously holding down the
key. The LCD shows
.
Step 2: Pressing the highest-order
.
key causes the LCD to show
key enters the measurement CAL mode.
Step 3: Pressing the
The
indicator blinks on the LCD and the
symbol
appears. The calibrator is now ready for defining the CAL 0
setpoints of measurement functions.
Step 4: Using the function selector switch, select the range to be adjusted.
key confirms the CAL 0 adjustment setpoint.
Step 5: Pressing the
The CAL indicator on the LCD changes to , setting the calibrator ready for full-scale calibration.
Step 6: Apply the CAL FS adjustment setpoint input of each range in
Table 10.2 from the calibration standard to the H and L input
terminals of the calibrator.
key confirms the CAL FS adjustment
Step 7: Pressing the
setpoint. At this point, the 0 and FS symbol blinks.
Step 8: Pressing the
memory.
once again saves the adjustment setpoint in
NOTE
• Range adjustments are made automatically within the calibrator so that the
LCD reading matches the adjustment setpoint in question given in the table
with reference to the input applied as described above. Therefore, you need
not make any range adjustment with
and
keys.
• Saving the adjustment setpoint results in the overwriting of existing data.
Be extremely careful since the previous adjustment setpoints are cleared.
• The temperature measuring ranges of the RTD function are adjusted at the
same time when the 400 Ω range is adjusted.
10-8
IM CA71-E
10.3 Adjusting Measurement Functions
Step 9: The 0 and FS symbols stop blinking, causing the calibrator to
return to the state discussed in step 4. Using the measurement range setting rotary switch, select the next range. By
repeating steps 4 to 8, you can adjust the measurement function assigned to that range.
TIP
Press the
key while holding down the
key. This key operation cancels the
CAL mode. You can use the same key operation to cancel the CAL mode during
calibration, before saving to memory.
10.4 Notes on the Adjustment of Temperature
Ranges - CAL71 only -
10.5 Post-adjustment Verification
When adjustment work is done, test the calibrator to ensure that adjustments have been made correctly and adjustment setpoints have been
saved into memory correctly. To do this test, turn off the calibrator
once and turn it back on again. Then, place the calibrator in normal
source or measurement mode and check the setpoints using the same
calibration standard.
Method of Calibrator Adjustment
Adjusting the temperature measuring ranges of the thermocouple function involves using special equipment to make reference junction compensation adjustments. For this reason, contact the vender from which
you purchased th instrument to perform this adjustment.
10
IM CA71-E
10-9
11. Using Accessories
When attaching accessories to the calibrator, refer to the following figure. When connecting the included terminal adapter, make sure the
adapter is positioned in the correct orientation.
Red
Red Black Black
Lead cables for
source
(98020)
RJ sensor
(B9108WA)
AC adapter
(A1020UP, A1022UP
or B9108WB)
11
RS232 communication
cable
(91017)
(for CA71 only)
IM CA71-E
Using Accessories
Fuse
(A1501EF)
Black
Lead cables for measurement
(RD031)
Red
The allowable voltage to ground when
the included terminal adapter is
attached to the input terminals is 30
Vpeak maximum.
Black
Terminal adapter
(99021)
WARNING
11-1
12. Specifications
(1) Signal sourcing unit range and accuracy (for both CA51 and CA71)
±(setting percentage plus µV, mV, mA, Ω or °C)
Parameter Reference
DC voltage
DC current
Range
-10.00–110.00 mV ±(0.02% + 15 µV)
1V
0–1.1000 V
±(0.02% + 0.1 mV) 0.1 mV Maximum output: 5 mA
10 V
0–11.000 V
±(0.02% + 1 mV)
30 V
0–30.00 V
±(0.02% + 10 mV) 10 mV Maximum output: 10 mA *1
20 mA
0–24.000 mA
20 mA
Resistance 400 Ω
RTD
±(0.025% + 3 µA)
1 mV
1 µA
Maximum output: 10 mA
Maximum load: 12 V
4 mA
±(0.05% + 3 µA)
0–400.00 Ω
±(0.025% + 0.1 Ω) 0.01 Ω Excitation current: 0.5–5 mA *3
If 0.1 mA, add 0.25 Ω or 0.6°C. Subject
±(0.025% + 0.3°C) 0.1°C device input capacitance: 0.1 µF or less
Pt100 *2 -200.0–850.0°C
JPt100
-200.0–500.0°C
K
-200.0–1372.0°C
±(0.02% + 0.5°C)
E
-200.0–1000.0°C
(-100°C or greater)
J
-200.0–1200.0°C
T
-200.0–400.0°C
±(0.02% + 0.5°C)
N
-200.0–1300.0°C
(0°C or greater)
L
-200.0–900.0°C
±(0.02% + 1°C)
U
-200.0–400.0°C
(0°C or less)
1 µA
0–1768°C
S
0.1°C
TC source accuracy does not include RJ
sensor accuracy.
RJ sensor specs
Measurement range: -10–50°C
Accuracy (when combined with main unit)
18–28°C: ±0.5°C
Other than the above: ±1°C
(100°C or less)
±(0.02% + 1.5°C)
(100°C or greater)
±(0.02% + 2°C)
600–1800°C
External power supply: 5–28 V
±(0.02% + 1°C)
±(0.02% + 2.5°C)
R
B
10 µV
0.1–24.000 mA
(-100°C or less)
TC *4
Remarks
100 mV
4–20 mA 4/8/12/16/20 mA
mA SINK
Accuracy (23±5°C per year) Resolution
1°C
(1000°C or less)
±(0.02% + 1.5°C)
(1000°C or greater)
500 Hz
1.0–500.0 Hz
Frequency,
10 kHz
pulse
Pulse
cycle *5
±0.2 Hz
±1 Hz
0.9 kHz–11.0 kHz
±0.1 kHz
1–99,999 cycles
–
0.1 Hz Output voltage: +0.1–+15 V (zero base waveform)
Amplitude accuracy: ±(5% + 0.1 V)
1 Hz
Maximum load current: 10 mA
Contact output
0.1 kHz (with 0.0 V amplitude setting, FET switch
ON/OFF)
1 cycle Maximum open/close voltage/current: +28 V/50
mA
Temperature coefficient: Accuracy shown above × (1/5)/°C
*1: Output up to 24 V/22 mA is possible when using the AC adapter.
*2: As per JIS C 1604-1997 (ITS-90). IPTS-68 may be selected through internal settings (DIP switch).
*3: Excitation current: If less than 0.1 mA to 0.5 mA, then add [0.025/ls (mA)] Ω or [0.06/ls (mA)]°C.
*4: As per JIS C 1602-1995 (ITS-90) (L and U are DIN specs).
K, E, J, T, N, R, S, and B may be switched to IPTS-68 through internal settings (DIP switch) (L and U are not switched).
*5: Frequency (interval between one pulse and another) and amplitude during pulse cycle source may have the same range as during
frequency source.
IM CA71-E
12-1
Specifications
1000 Hz 90–1100 Hz
12
12. Specifications
(2) Measurement unit range and accuracy (for both CA51 and CA71)
Accuracy: ±(reading percentage plus µV, mV, µA, Ω or dgt (digit))
Parameter
DC voltage
DC current
Reference
Accuracy (23±5°C per year) Resolution
100 mV
0–±110.00 mV
±(0.025% + 20 µV)
1V
0–±1.1000 V
±(0.025% + 0.2 mV) 0.1 mV
10 V
0–±11.000 V
±(0.025% + 2 mV)
1 mV
100 V
0–±110.00 V
±(0.05% + 20 mV)
0.01 V
20 mA
0–±24.000 mA
±(0.025% + 4 µA)
1 µA
100 mA
0–±100.00 mA
±(0.04% + 30 µA)
10 µA
0–400.00 Ω
±(0.05% + 0.1 Ω)
0.01 Ω
Resistance 400 Ω
AC voltage
Range
10 µV
1V
0–1.100 V
10 V
0–11.00 V
100 V
0–110.0 V
300 V
0–300 V
100 Hz
1.00–100.00 Hz
0.01 Hz
1000 Hz
1.0–1000.0 Hz
0.1 Hz
Frequency,
10 kHz
pulse
CPM
CPH
0.001–11.000 kHz
1 mV
±(0.5% + 5 dgt)
0.01 V
0.1 V
±(0.5% + 2 dgt)
±2 dgt
0–99,999 CPM
0–99,999 CPH
1V
Remarks
Input resistance: 10 MΩ or greater
Input resistance: Approximately 1 MΩ
Input resistance: Approximately 14 Ω
Accuracy during 3-wire measurement
Input resistance: Input frequency:
Approximately 10 45–65 Hz
Input voltage range:
MΩ/10 pF
10%–100%
Input resistance: Measurement
Approximately 1 method: Average
MΩ/10 pF
value rectification
Maximum input: 30 V peak
Input resistance: 200 kΩ or greater
Sensitivity: 0.5 V peak or greater
0.001 kHz Contact input: Maximum 100 Hz
Notes
1 CPM CPM: Counts per minute
1 CPH CPH: Counts per hour
Temperature coefficient: Accuracy shown above × (1/5)/°C
(3) Measurement unit (temperature; CA71 only) range and accuracy
Accuracy: ±(reading percentage + °C)
Parameter
TC *
7
RTD
Reference
Range
K
-200.0–1372.0°C
E
-200.0–1000.0°C
J
-200.0–1200.0°C
T
-200.0–400.0°C
N
-200.0–1300.0°C
L
-200.0–900.0°C
U
-200.0–400.0°C
R
0–1768°C
S
0–1768°C
B
600–1800°C
Pt100 *6
-200.0–850.0°C
JPt100
-200.0–500.0°C
Accuracy (23±5°C per year) Resolution
Remarks
±(0.05% + 1.5°C)
(-100°C or greater)
0.1°C
±(0.05% + 2°C)
(-100°C or less)
±(0.05% + 2°C)
(100°C or greater)
±(0.05% + 3°C)
(100°C or less)
1°C
±(0.05% + 0.6°C)
0.1°C
Accuracy during 3-wire measurement
Temperature coefficient: Accuracy shown above × (1/5)/°C
*6: As per JIS C 1604-1997 (ITS-90). IPTS-68 may be selected through internal settings (DIP switch).
*7: As per JIS C 1602-1995 (ITS-90) (L and U are DIN specs).
K, E, J, T, N, R, S, and B may be switched to IPTS-68 through internal settings (DIP switch) (L and U are not switched).
12-2
IM CA71-E
12. Specifications
■ General specifications (for both CA51 and CA71)
: Approximately 1 second (time between start of
voltage change and when voltage enters accuracy
range)
Signal sourcing unit voltage limiter
: Approximately 32 V
Signal sourcing unit current limiter
: Approximately 25 mA
Divided output (n/m) function
: Output = setting × (n/m) n = 0–m; m = 1–19; n ≤ m
Auto-step output function
: n value sent automatically when n/m function
selection is selected
(two options: approximately 2.5 seconds/step or
approximately 5 seconds/step)
Sweep function
: Sweep time (two options: approximately 16
seconds or approximately 32 seconds)
Memory function
: 50 value sets (sourced and measured values are
stored as value sets with the same address (up to
50 value sets can be stored))
Measuring unit maximum input
: Voltage terminal: 300 V AC Current terminal: 120
mA DC
Current terminal input protection
: Fuses: 125 mA/250 V
Measuring unit ground voltage
: Maximum 300 V AC
Measurement display updating rate : Approximately once per second
Serial interface
: Enabled when communication cable (RS232) is
connected; sold separately as optional accessory
(CA71 only)
Display
: Segmented LCD (approximately 76 mm × 48 mm)
Backlight
: LED backlight; auto-off after one minute (from
when LIGHT key is turned on)
Power supply
: Four AA-size (LR6) alkaline batteries, or special
AC adapter (sold separately)
Battery life
: Measurement off, output 5 V DC/10 kΩ or greater:
Approximately 40 hours
Simultaneous signal source/measurement, output
5 V DC/10 kΩ or greater: Approximately 20 hours
Simultaneous signal source//measurement, output
20 mA/5 V: Approximately 12 hours
(using alkaline batteries, with backlight off)
Consumed power
: Approximately 7 VA (using 100 V AC adapter)
Auto-power-off function
: Approximately 10 minutes (auto-power-off can be
disabled through a DIP switch setting)
Applicable standards
: IEC61010-1, IEC61010-2-31
EN61326-1: 1997 + A1: 1998
EN55011: 1998, Class B, Group 1
Insulation resistance
: Across input terminal and output terminal, 500 V
DC, 50 MΩ or greater
Withstand voltage
: Across input terminal and output terminal, 3.7
kVAC, for one minute
Operating temperature and humidity ranges : 0–50°C, 20–80% RH (no condensation)
Storage temperature and humidity ranges : -20–50°C, 90% RH or less (no condensation)
Signal sourcing unit response time
12-3
Specifications
IM CA71-E
12
12. Specifications
External dimensions (WHD)
Weight
Standard accessories
Optional accessories
(sold separately)
Spare parts
Safety standards
EMC
: Approximately 190 × 120 × 55 mm
: Approximately 730 g (including batteries)
: All of the following are included:
Lead cables for source (one red, two black):
98020
Lead cables for measurement (one red, one
black): RD031
Carrying case: 93016
Terminal adapter for CA71: 99021
User’s manual: IM CA71-E
Fuse: A1501EF (for current terminal input
protection)
Four AA-size (LR6) alkaline batteries: A1070EB × 4
: AC adapter: A1020UP (100 V AC power supply)
AC adapter: A1022UP (120 V AC power supply)
AC adapter: B9108WB (220–240 V AC power
supply)
RJ sensor: B9108WA (For reference junction
compensation)
Accessory carrying case: B9108XA
Communication cable: 91017
: Lead cables for source (one red, two black):
98020
Lead cables for measurement (one red, one
black): RD031
Carrying case: 93016
Terminal adapter: 99021
Fuse: A1501EF (for current terminal input
protection)
: EN61010-1, EN61010-2-031
Class II
Measurement category III (300Vrms max.)
Pollution degree 2
: EN61326 Class B; EN61000-3-2; EN61000-3-3
EN55011 Class B Group1
Performance criterion under immunity test
environments: B
(self-returnable performance deterioration)
Conditions of EMC:
Use AC adapter (B9108WB) for AC220-240V,
Lead cable for source (98020), Lead cable for
measurement (RD031),
RS232 Communication cable (91017)
and RJ sensor (B9108WA): attach a sleeve clamp
ferrite core
(YOKOGAWA B9108WC, Morimiya electric Co.
MSFC6KEX)
toward the main body of the instrument.
12-4
IM CA71-E
12. Specifications
■ External
120 (4.73)
193 (7.61)
113.8 (4.49)
Unit: mm
(approx. inches)
54.5 (2.15)
51 (2.01)
Note: This figure shows the CA71, but there is no difference in exterior from the CA51.
Specifications
12
IM CA71-E
12-5
Yokogawa Meters & Instruments Corporation
International Sales Dept.
Tachihi Bld. No.2, 6-1-3, Sakaecho, Tachikawa-shi,Tokyo 190-8586 Japan
Phone: 81-42-534-1413, Facsimile: 81-42-534-1426
YOKOGAWA CORPORATION OF AMERICA (U.S.A.)
Phone: 1-770-253-7000 Facsimile: 1-770-251-2088
YOKOGAWA EUROPE B. V. (THE NETHERLANDS)
Phone: 31-334-64-1611 Facsimile: 31-334-64-1610
YOKOGAWA ENGINEERING ASIA PTE. LTD. (SINGAPORE)
Phone: 65-6241-9933 Facsimile: 65-6241-2606
YOKOGAWA AMERICA DO SUL S. A. (BRAZIL)
Phone: 55-11-5681-2400 Facsimile: 55-11-5681-1274
YOKOGAWA MEASURING INSTRUMENTS KOREA CORPORATION (KOREA)
Phone: 82-2-551-0660 to -0664 Facsimile: 82-2-551-0665
YOKOGAWA AUSTRALIA PTY. LTD. (AUSTRALIA)
Phone: 61-2-9805-0699 Facsimile: 61-2-9888-1844
YOKOGAWA INDIA LTD. (INDIA)
Phone: 91-80-4158-6000 Facsimile: 91-80-2852-1441
YOKOGAWA SHANGHAI TRADING CO., LTD. (CHINA)
Phone: 86-21-6880-8107 Facsimile: 86-21-6880-4987
YOKOGAWA MIDDLE EAST E. C. (BAHRAIN)
Phone: 973-358100 Facsimile: 973-336100
LTD. YOKOGAWA ELECTRIC (RUSSIAN FEDERATION)
Phone: 7-095-737-7868 Facsimile: 7-095-737-7869
IM3E-2006.2