YOKOGAWA CA51 HANDY CAL User manual

User’s
Manual Model CA51, CA71
HANDY CAL
(Calibrator)
IM CA71-E
13th Edition: November 2021 (YMI)
IM CA71-E
Store this manual in an easily accessible
place for quick reference.

IM CA71-E i
13th Edition: November 2021 (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 00C01C01-01Z1: Safety manual (European languages)
IM CA71-93Z2: Document for Korea
Contact information of Yokogawa o󰀩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 e󰀨ort 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
November 2018: 10th Edition
March 2021: 11th Edition
May 2021: 12th Edition
November 2021: 13th 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.
Standard accessories are not covered by warranty of this instrument.
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.
The general safety precautions described herein must be observed
during all phases of operation.
If the instrument is used in a manner not specied in this manual,
the protection provided by the instrument may be impaired.
This manual is part of the product and contains important information.
Store this manual in a safe place close to the instrument so that you
can refer to it immediately.
Keep this manual until you dispose of the instrument.
YOKOGAWA assumes no liability for the customer’s failure to comply
with these requirements.
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 o󰀨 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 YOKOGAWA with 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.
•DamagedSignalCable
If the signal cable (lead cables) is torn and the inner metal is exposed or
if a color di󰀨erent from the outer sheath appears, stop using the cable
immediately.
•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 YOKOGAWA or the dealer from whom you purchased the instrument.
CAUTION
OperatingEnvironmentLimitations
This product is classied as Class A (for use in industrial environments).
Operation of this product in a residential area may cause radio interference,
in which case the user will be required to correct the interference.
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
Précautionsd’usagepourutiliser
l’appareilentoutesécurité
Ce produit est conçu pour être utilisé par une personne possédant
des connaissances spécialisées.
Les consignes générales de sécurité décrites dans ce manuel doivent
être respectées pendant toutes les phases de fonctionnement.
Si l'instrument est utilisé d'une manière non spéciée dans ce
manuel, la protection fournie par l'instrument peut être compromise.
Ce manuel fait partie du produit et contient des informations importantes.
Conservez ce manuel dans un endroit sûr, à proximité de l'instrument
an de pouvoir vous y référer immédiatement.
Conservez ce manuel jusqu'à la mise au rebut de l'instrument.
YOKOGAWA décline toute responsabilité quant au non-respect de
ces exigences.
Symbolesutiliséssurl'instrumentetdanscemanueld’instructions:
Danger ! Manipuler avec soin.
Ce symbole indique que l’opérateur doit se reporter à une
explicationdonnée par le manuel d’instruction, an d’éviter tout
accident susceptible de provoquer des blessures au personnel
qui peuvent éventuellement s’avérer mortelles, ou de protéger
l’appareil.
Ce symbole indique une tension/intensité C.C.
Ce symbole indique une tension/intensité C.A.
Ce symbole indique le C.A. et le C.C.
AVERTISSEMENT
Indique un danger. Attire l’attention sur une utilisation quipourrait engendrer
des accidents susceptibles de provoquer des blessures qui peuvent
éventuellement s’avérer mortelles.
ATTENTION
Indique un danger. Attire l’attention sur une utilisation qui pourrait engendrer
une blessure personnelle et/ou être préjudiciable au produit.

IM CA71-E xi
Remarque
Indique les informations essentielles à la manipulation de l’instrument ou qui
doivent être prises en compte an de vous familiariser avec les procédures
d’utilisation et/ou l es fonctions de l’instrument.
Conseil
Ce qui suit indique des informations supplémentaires pour les explications.
Uneélectrocutionoud'autresfacteurspeuvententraînerdes
dommagesdel'instrumentoudesblessurescorporelles,
voirelamort.Pourévitercela,suivezlesprécautionsci-dessous.
AVERTISSEMENT
•Utiliserl'instrumentuniquementpoursonbutprévu
Cet instrument sert à générer (source)/mesurer la tension ou le courant.
(Cet instrument sert à générer et mesurer la résistance et à générer et à
mesurer la température à l'aide de résistances ou de thermocouples.)
Ne pas utiliser cet instrument à d'autres ns.
•Vérierl'aspectphysique
Ne pas utiliser l'instrument si son aspect physique présente une anomalie.
•Utilisationdansdesgaz
Ne pas faire fonctionner cet instrument dans des zones où des gaz ou vapeurs
inammables ou explosives existent. Il est extrêmement dangereux d'utiliser
l'instrument dans de tels environnements.
•Défautsdesfonctionsdeprotection
Ne pas utiliser cet instrument si un défaut semble exister dans de tels
dispositifs de protection comme par exemple, les fusibles.
Avant d'utiliser l'instrument, s’assurer que les dispositifs de protection sont
exempts de tout défaut.
•Connexionexterne
Lors de la connexion de l'instrument à l'objet testé ou à un circuit de
commande externe, ou si vous devez toucher un circuit externe, coupez
l'alimentation du circuit et assurez-vous qu'aucune tension n'est fournie.
•Fusibles
An d'éviter tout risque d'incendie, utiliser un fusible de calibre
(courant, tension et type) spécié pour l'instrument.
Ne pas court-circuiter le porte-fusible.
Précautions d’usage pour utiliser l’appareil en toute sécurité

xii IM CA71-E
AVERTISSEMENT
•Utilisationcorrectedescâblesconducteurs
Utiliser les câbles conducteurs fournis par YOKOGAWA avec cet instrument.
N'utilisez pas de câbles conducteurs détériorés ou défectueux.
Vérier la continuité des câbles.
Utiliser correctement les câbles conducteurs pour la mesure (P/N : RD031) et
la source (P/N : 98020) sans confondre l'un avec l'autre.
Pour la mesure de haute tension, utilisez toujours le câble conducteur pour la
mesure.
•Câble(Sonde)designalendommagé
Si le câble de signal est déchiré et que le métal intérieur est exposé ou si
une couleur di󰀨érente de la gaine externe est visible, arrêter immédiatement
d’utiliser ce câble.
•Nepasretirerleboîtieroudémonter
Seul le personnel de maintenance Yokogawa est autorisé à retirer le boîtier ou
à démonter ou modier l'instrument.
Ne pas tenter de réparer l'instrument soi-même, car cela est extrêmement
dangereux.
Certaines pièces à l'intérieur de l'instrument sont extrêmement dangereuses
car elles utilisent une haute tension.
Si l'instrument nécessite une inspection ou un étalonnage interne, contactez
YOKOGAWA ou le revendeur auprès duquel vous avez acheté l'instrument.
ATTENTION
Limitationsrelativesàl’environnementopérationnel
Ce produit est un produit de classe A (pour environnements industriels).
L’utilisation de ce produit dans un zone résidentielle peut entraîner une
interférence radio que l’utilisateur sera tenu de rectier.
Précautions d’usage pour utiliser l’appareil en toute sécurité

IM CA71-E xiii
Pouruneutilisationentoutesécuritédel'adaptateursecteuren
option,suivrelesprécautionsci-dessous.
AVERTISSEMENT
• S'assurer que la tension d'alimentation nominale de l'instrument correspond
à la tension de l'alimentation électrique avant la mise sous tension.
• Pour éviter tout risque d'électrocution ou d'incendie, veiller à utiliser
l'adaptateur secteur et le cordon d'alimentation fournis par YOKOGAWA.
De plus, ne pas utiliser l'adaptateur secteur et le cordon d'alimentation
fournis avec cet instrument avec un autre instrument.
• Ne mettre aucun objet sur l'adaptateur secteur ou le cordon d'alimentation
et éviter que des sources de chaleur n'entrent en contact avec ces derniers.
• En débranchant le cordon d'alimentation de la prise, veiller à le tenir par la
che et ne jamais tirer sur le cordon.
• Ne pas jeter (mettre au rebut) l'adaptateur secteur au feu et ne pas l'exposer
à la chaleur.
• Ne pas l'utiliser à l’endroit où le cordon est enroulé (plié).
• Si le cordon d'alimentation est endommagé, contacter le revendeur.
Précautions d’usage pour utiliser l’appareil en toute sécurité

xiv IM CA71-E
Contents
Introduction ..........................................i
CheckingItemsinthePackage .........................iii
PrecautionsforSafeUseoftheInstrument ...............vi
Précautionsd’usagepourutiliserl’appareilentoutesécurité .....x
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 ................................4-4
4.2.1 Sourcing DC Voltage or DC Current Signal ........4-4
4.2.2 4-20 mA Function ............................4-5
4.2.3 20 mA SINK Function.........................4-6
4.2.4 Using As 24-V Loop Power Supply ..............4-7
4.3 Sourcing Resistance or RTD Signal ....................4-8
4.4 Sourcing Thermocouple (TC) Signals..................4-10
4.4.1 When RJ Sensor Is Used
(Making Use of Reference Junction Compensation) ..4-10
4.4.2 When No RJ Sensor Is Used ..................4-13
4.5 Sourcing Pulse Signals.............................4-14
4.5.1 Sourcing a Continuous Pulse Train .............4-14
4.5.2 Sourcing the Preset Number of Pulses
(Pulse Cycle) ..............................4-16
4.5.3 Using the Contact Output.....................4-18
4.6 Divided Output Function (n/m) .......................4-20
4.7 Sweep Function ..................................4-21
4.8 Auto Step Function ................................4-21
4.9 Temperature Monitor Function .......................4-22

IM CA71-E xv
1
2
3
4
5
6
7
8
9
10
11
12
13
App
Contents
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 .................5-5
5.2.1 Measuring 300 V AC-range Voltage..............5-5
5.2.2 Measuring DC or AC Voltage ...................5-6
5.2.3 Measuring DC Current ........................5-6
5.3 Measuring Resistance or RTD (CA71 only) Signal.........5-7
5.4 Measuring Temperature with
Thermocouple (TC) - CA71 only -......................5-8
5.5 Measuring Frequency or Pulses.......................5-9
5.5.1 Operating the Calibrator for Frequency
Measurement...............................5-9
5.5.2 Operating the Calibrator for Measuring Number of
Pulses ....................................5-9
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

xvi IM CA71-E
Contents
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andCalibration ...................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 ....................10-7
10.3.1 Adjusting DC Voltage and DC Current Ranges ....10-7
10.3.2 Adjusting AC Voltage and Resistance
(400 Ω) Ranges ............................10-9
10.4 Notes on the Adjustment of Temperature Ranges
- CAL71 only -...................................10-10
10.5 Post-adjustment Verication ........................10-10
11. UsingAccessories ..............................11-1
12. Specications..................................12-1
13. RegulationsandSalesinVariousCountriesand
Regions .......................................13-1
13.1 Waste Electrical and Electronic Equipment (WEEE) ......13-1
13.2 Batteries and Waste Batteries .......................13-1
13.3 Authorized Representative in the EEA . . . . . . . . . . . . . . . . . 13-2
13.4 Disposal ........................................13-2
13.5 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

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 C1602-1995 (ITS-90), except for the type-L and U thermocouples
that comply with DIN 43710-1985.
*2: The RTD comply with the Japanese Industrial Standard JIS C1604 (ITS-90).
(Pt100: JIS C 1604-1997, JPt100: JIS C 1604-1989)
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.