Yokogawa CA71 Operating Manual

User ’s Manual

IM CA71-E

Model CA51, CA71 HANDY CAL (Calibrator)

Store this manual in an easily accessible place for quick reference.

10th Edition: Nov. 2018 (YMI)

IM CA71-E

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

10th Edition: November 2018 (YMI) All Rights Reserved. Copyright © 2002, Yokogawa M&C Corporation, 2014, Yokogawa Meters & Instruments Corporation, 2017, Yokogawa Test & Measurement Corporation Printed in Japan

IM CA71-E

Introduction

■ 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 November 2018: 10th Edition

IM CA71-E

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.

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iii

Checking Items in the Package

Lead cables

Lead cables for

Carrying case

Terminal adapter

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.

for source

(98020)

(99021)

measurement

(RD031)

AA-size (LR6)

alkaline batteries

(four units)

(93016)

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

Accessories case

RJ sensor Communication cable

Checking Items in the Package

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 Carrying case 93016 Terminal adapter 99021 Used for temperature measurement Fuse --- A1635EF (1 piece)

RD031

IM CA71-E

AC adapter

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

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.

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vii

Precautions for Safe Use of the Instrument

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 different 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

This product is for domestic use (Class B) and meets the electromagnetic compatiblity requirements.

viii

IM CA71-E

Precautions for Safe Use of the Instrument

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.

IM CA71-E

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)

4.4.2 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

...4-9

IM CA71-E

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 .................5-4

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

6.1.3 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

...6-4

App

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 ....................10-6

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

xii

IM CA71-E

1. Functions

Temperature

3Wire

AC adapter

MEASURE

■ Block Diagram

SOURCE

Pulse

source

Output on/off relay

D/A

converter

Multiplying

SOURCE Mode

Section

Reference

voltage

Overcurrent

detection

Current-to-voltage

conversion

Setting

Display

RJ INPUT

Temperature

A/D

converter

CPU

sensor

Communication

cable

DIP switch

Memory

Functions

IM CA71-E

A/D

MEASURE Mode

Section

detection

circuit

Input

voltage

selector &

Constant

current

source

converter

divider

sensor

Shunt resistor

FUSE mA

DC/DC

converter

Measurement mode

on/off switch

Power

supply

circuit

Batteries

Power-on/off switch

AC100V

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.

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.

RTD Sources resistance corresponding to the temperature

detected by a Pt100 or JPt100 RTD.

Frequency and pulse

*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.

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.

*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.

1-2

IM CA71-E

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.

RTD Measures temperature according to the type of

RTD – Pt100 or JPt100.

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.

(CA71 only)

Functions

You can also select and congure the following functions.

Function Description

Divided output function (n/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

IM CA71-E

Sources a “setpoint × (n/m)” output signal, where the variables m and n are dened as m = 1 to 19 and n = 0 to m.

output in a step-by-step manner.

1-3

1. Functions

• Power Supply

The calibrator operates on AA-size (LR6) alkaline batteries or the optional AC adapter.

1-4

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2. Names and Functions of Parts

MEASURE

SOURCE

3 4

Names and Functions of Parts

1 98 17 1521116 14

181910

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2-1

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.

2-2

IM CA71-E

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.

Names and Functions of Parts

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2-3

2. Names and Functions of Parts

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.

17) n/m Key Turns on/off the divided output function (n/m).

and Output Setting Keys

18) 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 overow or underow, allowing you to set the output value without interruption.

Holding down the 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

• The

and keys are also used in the following ways:

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.

or key continuously changes the digit in

2-4

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i jg h

2. Names and Functions of Parts

■ 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.

24) I/O Port Cover Open this cover to connect the RS232 communication cable (P/N: 91017). (CA71 only)

■ LCD Unit

Names and Functions of Parts

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.

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2-5

2. Names and Functions of Parts

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 signicant two digits “18” denote the value of n, while the least signicant 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.

k) Battery replacement indicator (Remaining battery power 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

Precautions for Safe Use of the Instrument

● When using the instrument for the rst time, be sure to read

the instructions given on pages vi to ix 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.

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 electried 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.

● 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.

Before Starting Source/Measurement

IM CA71-E

3-1

3. Before Starting Source/Measurement

● 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.

Operating Environment and Conditions

This instrument complies with the EMC standard under specic

operating environment and operating conditions. If the installation, wiring, and so on are not appropriate, the compliance conditions of the EMC standard may not be met. In such cases, the user will be required to take appropriate measures.

■ 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

• Indoors

• Operating altitude: 2000 m or less

3-2

Do not use the instrument in locations that are:

• Outdoors

• exposed to direct sunlight or close to any heat source;

• exposed to water or other liquids;

• 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 elds;

• 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 ammable

gases.

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 coefcient shown in Chapter 12, “Specications (page 12-1),” to the given accuracy rating.

• 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.

• 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

Before Starting Source/Measurement

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 uid 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 re.

• 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.

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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 tightly.

OPEN

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Indication of Battery Level (Remaining Battery Power Indicator)

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.

(ashing): replace the batteries.

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3. Before Starting Source/Measurement

Note that the battery replacement (remaining battery power) 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. If the remaining power starts to run low, replace the batteries as soon as possible.

If the calibrator will be used under a wide variety of conditions, it is advisable that the battery replacement indicator be veried under heavy loads (MEASURE mode is on and the SOURCE mode is set to the 20 mA/10 V output).

■ Connecting the AC Adapter

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.

Before Starting Source/Measurement

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.

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3. Before Starting Source/Measurement

■ Turning On/Off the Power

CAUTION

To verify the instrument's functionality, check that the measured value is updated after turning on the power. If the measured value is not updated, the reading will be incorrect and may lead to possible electrical shock or

personal injury.

Turning On/Off the POWER Switch

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

• 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.

• Be sure to turn off the POWER switch when you nish using the instrument.

key.

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3. Before Starting Source/Measurement

Turning On/Off MEASURE Mode

Pressing the 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 the

TIP

One to two seconds are taken for the LCD to turn on after the MEASURE mode is turned on.

key after power-on turns off the MEASURE

key once again.

■ 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.

Before Starting Source/Measurement

NOTE

The backlight automatically turns off approximately one minute later.

To turn on the backlight again, press the

key once again.

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