YOKOGAWA CA71 HANDY CAL User manual

User’s
Manual Model CA51, CA71
HANDY CAL
(Calibrator)
IM CA71-E
9th Edition: Oct. 2017 (YMI)
IM CA71-E
Store this manual in an easily accessible
place for quick reference.

IM CA71-E i
9th Edition: October 2017 (YMI)
All Rights Reserved. Copyright © 2002, Yokogawa M&C Corporation,
2014, Yokogawa Meters & Instruments Corporation,
2017, Yokogawa Test & Measurement Corporation
Printed in Japan
Introduction
Thank you for purchasing the CA51/CA71 HANDY CAL Calibrator.
This User’s Manual explains the functions of the CA51 and CA71,
as well as the operating methods and handling precautions.
Before using this product, thoroughly read this manual to
understand how to use it properly.
■ List of Manuals
The following manuals, including this one, are provided as manuals
for the CA51 and CA71. Please read all manuals.
Manual No. Description
IM CA71-E User's Manual (this manual)
IM CA71-93Z2 Document for Korea
Contact information of Yokogawa ofces worldwide is provided on
the following sheet.
Document No. Description
PIM 113-01Z2 Inquiries List of worldwide contacts

ii IM CA71-E
■ 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
November 2007: 3rd Edition
January 2012: 4th Edition
July 2014: 5th Edition
April 2015: 6th Edition
April 2016: 7th Edition
August 2017: 8th Edition
October 2017: 9th Edition
Introduction

IM CA71-E iii
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 (specications) codes in the MODEL and SUFFIX
elds of the nameplate at the back of the instrument to ensure that
the instrument is exactly as specied in your purchase order.
• Model Codes
Model Specication
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.

iv 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)
Lead cables for
measurement
(RD031)
Carrying case
(93016)
Terminal adapter
(99021) AA-size (LR6) alkaline batteries
(four units)
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 v
Product Part Number Remarks
AC adapter 94012 For 100 VAC
AC adapter 94013 For 120 VAC
AC adapter 94016 For 220 to 240 VAC
RJ sensor B9108WA For reference junction compensation
Accessories case B9108XA
Communication cable
(RS232) 91017 (For CA71 only)
Power cord of AC adapter:
94016-F (VDE standard), 94016-S (BS stanndard)
Make sure that the attached power cord meets the designated
standards of the country and area that you are using it in.
Optional Spare Parts
Product Part Number Remarks
Lead cable for source 98020
Lead cable
for measurement RD031
Carrying case 93016
Terminal adapter 99021 Used for temperature measurement
Fuse --- A1635EF (1 piece)
Accessories case
AC adapter
RJ sensor Communication cable
Checking Items in the Package

vi IM CA71-E
Precautions for Safe Use of the Instrument
This product is designed to be used by a person with specialized
knowledge.When operating the instrument, be sure to observe
the cautionary notes given below to ensure correct and safe use of
the instrument. If you use the instrument in any way other than as
instructed in this manual, the instrument’s protective measures may
be impaired. This manual is an essential part of the product;
keep it a safe place for future reference.
YOKOGAWA is by no means liable for any damage resulting from
use of the instrument in contradiction to these 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.

IM CA71-E vii
Precautions for Safe Use of the Instrument
NOTE
Draws attention to information essential for understanding the operation
and features.
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 the instrument Only for Its Intended Purpose
This instrument is for generating (sourcing)/measuring voltage or current.
(This instrument is for generating and measuring resistance and
generating and measuring temperature using resistance or thermocouples.)
Do not use this instrument for other purpose.
• Check the Physical Appearance
Do not use the instrument if there is a problem with its physical appearance.
• Use in gases
Do not operate this instrument in areas where inammable 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 re, use a fuse with ratings (current, voltage,
and type) specied for the instrument. Do not short-circuit the fuse holder.

viii IM CA71-E
WARNING
• Correct Use of Lead Cables
Use the lead cables supplied by YOKOGAWAwith this instrument.
Do not use lead cables that have deteriorated or are defective.
Check lead cables continuity.
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.
• Do Not Remove the Casing or Disassemble
Only Yokogawa service personnel are authorized to remove the casing or
disassemble or modify the instrument.
Do not attempt to repair the instrument yourself, as doing so is extremely
dangerous. Some parts inside the instrument are extremely dangerous
because they use a high voltage.
When the instrument needs an internal inspection or calibration,
contact YOKOGAWAor the dealer from whom you purchased the instrument.
CAUTION
This product is for domestic use (Class B) and meets the electromagnetic
compatiblity requirements.
Precautions for Safe Use of the Instrument

IM CA71-E ix
For the safe use of the optional AC adapter, follow the precautions
given below.
WARNING
• Make sure that the rated power supply voltage of the instrument matches
the voltage of the power supply before turning on the power.
• To prevent the possibility electrical shock or re, be sure to use the AC
adapter and the power cord supplied by YOKOGAWA.Additionally, do not
use the AC adapter and the power cord supplied with this instrument with
another instrument.
• Do not place anything on the AC adapter or power cord, and prevent heat
sources from coming into contact with them.
• When unplugging the power cord from the outlet, be sure to hold the plug
and never pull the actual cord.
• Do not throw (dispose of ) the AC adapter in re or apply heat to it.
• Do not use it, where the cord is bundled (bent).
• If the power cord is damaged, contact your dealer.
Precautions for Safe Use of the Instrument

xIM CA71-E
Contents
Introduction .......................................i
Checking Items in the Package ......................iii
Precautions for Safe Use of the Instrument ............vi
1. Functions .......................................1-1
2. Names and Functions of Parts .....................2-1
3. Before Starting Source/Measurement ................... 3-1
4. Source .........................................4-1
4.1 Connecting Cables to Terminals.......................4-2
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
4.3 Sourcing Resistance or RTD Signal....................4-7
4.4 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 . . . . . . . . . . . . . . . . . . .4-12
4.5 Sourcing Pulse Signals.............................4-13
4.5.1 Sourcing a Continuous Pulse Train ..............4-13
4.5.2 Sourcing the Preset Number of Pulses
(Pulse Cycle) ...............................4-15
4.5.3 Using the Contact Output......................4-17
4.6 Divided Output Function (n/m).......................4-19
4.7 Sweep Function ..................................4-20
4.8 Auto Step Function................................4-20
4.9 Temperature Monitor Function .......................4-21

IM CA71-E xi
1
2
3
4
5
6
7
8
9
10
11
12
13
App
5. Measurement ....................................5-1
5.1 Connecting Cables to Terminals.......................5-2
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 . . . . . . . . . . . . . . . . . . . .5-5
5.2.3 Measuring DC Current . . . . . . . . . . . . . . . . . . . . . . . . .5-5
5.3 Measuring Resistance or RTD (CA71 only) Signal.........5-6
5.4 Measuring Temperature with
Thermocouple (TC) - CA71 only -......................5-7
5.5 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
6. Memory Functions ...............................6-1
6.1 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
6.2 Reading Data from Memory . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
6.3 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
6.4 Sending Out Data from Memory
- CA71 only -......................................6-7
7. Functions Provided by DIP Switch ..................7-1
7.1 Sweep Function ...................................7-2
7.2 Auto Step Function.................................7-4
7.3 Selecting the INT RJ Function ........................7-6
7.4 Selecting the IPTS-68 Function .......................7-7
7.5 Switch Not Used...................................7-7
7.6 Temp Switch ......................................7-7
7.7 Selecting the Contact In Function
(Contact Input for Pulse Measurement) .................7-7
Contents

xii IM CA71-E
8. Communication Function - CA71 only - .................8-1
8.1 Cables Connection and Interface Specications ..........8-1
8.2 Setting the Mode...................................8-2
8.3 Types of Mode ....................................8-2
8.4 Data Format ......................................8-3
8.5 Data Structure.....................................8-3
8.6 Commands .......................................8-4
8.7 Detailed Description of Commands ....................8-5
9. Troubleshooting .................................9-1
10. Method of Calibrator Adjustment ..................10-1
10.1 Calibration Standard Selection and
Environmental Requirements ........................10-1
10.2 Adjusting Source Functions .........................10-3
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
10.4 Notes on the Adjustment of
Temperature Ranges - CAL71 only - ..................10-9
10.5 Post-adjustment Verication .........................10-9
11. Using Accessories ..............................11-1
12. Specications ..................................12-1
13. Sales in Each Coutry or Region....................13-1
13.1 Disposing the Product..............................13-1
13.2 How to Replace and Dispose the Batteries .............13-1
13.3 Authorized Representative in the EEA . . . . . . . . . . . . . . . . .13-2
13.4 For the Pollution Control of Electronic
and Electrical Products of the People's
Republic of China .................................13-3
Appendix 1 Reference Junction Compensation ..........App1-1
Contents

IM CA71-E 1-1
Functions
1
2
3
4
5
6
7
8
9
10
11
12
13
App
1. Functions
■ Block Diagram
Constant current source
RJ detection circuit
Temperature
sensor
Reference voltage
V
V
Ω
mA
mA
mA
3Wire
3W
FUSE mA
Setting
Power supply circuit
AC100V
DC/DC converter
Measurement mode on/off switch
Power-on/off switch
Output on/off relay
Batteries
AC adapter
MEASURE Mode Section SOURCE Mode
Section
MEASURE
H
L
H
L
CPU
Shunt resistor
Multiplying
D/A
converter
A/D
converter Temperature
sensor
Overcurrent detection
Pulse source
Communication cable
SOURCE
Memory
Display
DIP switch
RJ INPUT
A/D
converter
Input
selector &
voltage
divider
Ω
Ω
Current-to-voltage conversion

1-2 IM CA71-E
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.
DC current Sources a DC current signal in the 20 mA range.
SINK current Draws a sink current from an external power source in the
20 mA range.
Resistance Sources a resistance signal in the 400 Ω range.
Thermocouple (TC) 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
RTD Sources resistance corresponding to the temperature
detected by a Pt100 or JPt100 RTD.*2
Frequency and
pulse 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
dened by the frequency mentioned above.
*1: The thermocouples comply with the Japanese Industrial Standard
JIS C1602 (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 (ITS-90).
The internal DIP switch can be congured so that the detectors comply with
IPTS-68 instead.

IM CA71-E 1-3
Functions
1
2
3
4
5
6
7
8
9
10
11
12
13
App
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.
Function Description
DC voltage Measures a DC voltage signal in the 100 mV, 1 V, 10 V or
100 V range.
AC voltage Measures a DC voltage signal in the 1 V, 10 V, 100 V or
300 V range.
DC current 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.
Resistance Measures a resistance signal in the 400 Ω range.
Thermocouple (TC) Measures temperature according to the type of
thermocouple – K, E, J, T, R, B, S, N, L or U.*1(CA71 only)
RTD Measures temperature according to the type of
RTD – Pt100 or JPt100. *2(CA71 only)
Frequency and
pulse 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.
You can also select and congure the following functions.
Function Description
Divided output
function (n/m)Sources a “setpoint ×(n/m)” output signal, where the variables mand n are dened 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 nin a setpoint × n/m
output in a step-by-step manner.

1-4 IM CA71-E
1. Functions
• Power Supply
The calibrator operates on AA-size (LR6) alkaline batteries or
the optional AC adapter.

IM CA71-E 2-1
Names and Functions of Parts
1
2
3
4
5
6
7
8
9
10
11
12
13
App
2. Names and Functions of Parts
23
24
21
181910
12
13
22
20
6
7
5
3 4
1 98 17 152
11
16 14
MEASURE SOURCE

2-2 IM CA71-E
2. Names and Functions of Parts
■ Front Panel
1) POWER Key
Turns on/off the power supply.
2) 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.

IM CA71-E 2-3
Names and Functions of Parts
1
2
3
4
5
6
7
8
9
10
11
12
13
App
2. Names and Functions of Parts
8) 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.
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.