Yokogawa CA71, CA51 User Manual

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User’s Manual

IM CA71-E

Model CA51/71 HANDY CAL (Calibrator)

2nd Edition: Dec. 2006

IM CA71-E

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 multifunc-

tional 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

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)

AA-size (LR6)

alkaline batteries

(four units)

Carrying case

(93016)

User’s manual

Fuse

(A1501EF)

(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.

Product Part Number Remarks

AC adapter A1020UP For 100 V AC AC adapter A1022UP For 120 V AC AC adapter B9108WB For 220 to 240 V AC RJ sensor B9108WA For reference junction

Accessories case B9108XA Communication cable (RS232) 91017 (For CA71 only)

compensation

IM CA71-E iii

Checking Items in the Package

Optional Spare Parts

Product Part Number Remarks

Lead cable for source 98020 Lead cable for measurement RD031 Carrying case 93016 Terminal adapter 99021

Fuse A1501EF 10 units as a kit

Used for temperature measurement

Accessories case

AC adapter

RJ sensor Communication cable

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

Introduction .................................................................................................. i

Checking Items in the Package ....................................................................ii

Precautions for Safe Use of the Instrument ................................................ v

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 ........................................ 4-11

4.5 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

4.6 Divided Output Function (n/m).................................................... 4-18

4.7 Sweep Function .......................................................................... 4-20

4.8 Auto Step Function ..................................................................... 4-20

4.9 Temperature Monitor Function....................................................4-20

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

5.2.3 Measuring DC Current .................................................... 5-4

5.3 Measuring Resistance or RTD (CA71 only) Signal....................... 5-6

IM CA71-E vii

Contents

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.................................................... 7-6

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

7.8 Disabling the Automatic Power-off Feature................................... 7-7

8. Communication Function - CA71 only -................................... 8-1

8.1 Cables Connection and Interface Specifications .......................... 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

viii IM CA71-E

Contents

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 V erification........................................................ 10-9

11. Using Accessories................................................................... 11-1

12. Specifications........................................................................... 12-1

IM CA71-E ix

1. Functions

■ Block Diagram

SOURCE

Pulse

source

Output on/off relay

D/A

Multiplying

SOURCE Mode

Section

Reference

voltage

Functions

Communication

cable

DIP switch

Memory

Display

RJ INPUT

Temperature

A/D

converter

CPU

sensor

Overcurrent

detection

Ω

Current-to-voltage

conversion

Setting

converter

Ω

A/D

Input

selector &

MEASURE

converter

divider

voltage

sensor

Temperature

Shunt resistor

FUSE mA

3Wire

DC/DC

converter

Measurement mode

on/off switch

Power

supply

circuit

Power-on/off switch

AC100V

Batteries

AC adapter

MEASURE Mode

Section

detection

circuit

Constant

current

source

Ω

IM CA71-E 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

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

Resistance Sources a resistance signal in the 400 Ω range. Thermocouple (TC) Sources a thermoelectromotive force corresponding to the

RTD Sources resistance corresponding to the temperature de-

Frequency and pulse Sources a continuous pulse train with frequency in the 500

V range.

20 mA range.

temperature detected by a type-K, E, J, T, R, B, S, N, L or U thermocouple.*

tected by a Pt100 or JPt100 RTD.*

Hz, 1 kHz or 10 kHz range. This function also sources the preset number of pulses defined by the frequency mentioned above.

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

AC voltage Measures a DC voltage signal in the 1 V, 10 V, 100 V or 300

DC current Measures a DC current signal in the 20 mA or 100 mA

Resistance Measures a resistance signal in the 400 Ω range. Thermocouple (TC) Measures temperature according to the type of thermo-

RTD Measures temperature according to the type of RTD –

Frequency and pulse Measures frequency in the 100 Hz, 1 kHz or 10 kHz range.

100 V range.

V range.

range. The current terminals are equipped with a built-in overrange input protection fuse.

couple – K, E, J, T, R, B, S, N, L or U.*1 (CA71 only)

Pt100 or JPt100. *2 (CA71 only)

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 configure the following functions.

Function Description

Divided output function(

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

) Sources a “setpoint × ( ables m and n are defined as m = 1 to 19 and n = 0 to m.

output in a step-by-step manner.

n/m

)” output signal, where the vari-

n/m

Functions

IM CA71-E 1-3

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

*2: The RTD comply with the Japanese Industrial Standard JIS C1604-1997

C1602-1995 (ITS-90), except for the type-L and U thermocouples that comply with DIN.

(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

3 4

Names and Functions of Parts

1 98 17 1521116 14

181910

IM CA71-E 2-1

2. Names and Functions of Parts

■ Front Panel

1 POWER Key

Turns on/off the power supply.

2LIGHT 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.

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.

Names and Functions of Parts

IM CA71-E 2-3

2. Names and Functions of Parts

n/m

Key

Turns on/off the divided output function (

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 variables n and m when you have selected the divided output func-

n/m

tion ( 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.

). (See Section 4.6, “Divided Output Function (

n/m

and m serve as keys for setting the

n/m

),” for

■ 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)

d e

i jg h

■ 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.

n/m

i. Divided output function (

Comes on when the divided output function ( most significant two digits “18” denote the value of significant two digits “88” mean the value of

j. CAL mode selection indicator

The 0 and FS indicators below this indicator denote zero point and full scale adjustments, respectively.

) indicator

n/m

) is selected. The

, while the least

Names and Functions of Parts

IM CA71-E 2-5

2. Names and Functions of Parts

k. Battery replacement indicator

Shows the battery level in three steps according to the level of remain-

ing 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

Before Starting Source/Measurement

■ Operating Precautions

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.

Before Starting Source/Measurement

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

● 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 mo-

tive power sources;

•close to any source of intensive electric or electromagnetic fields;

• exposed to large amounts of greasy fumes, hot steam, dust or cor-

rosive 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.

•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 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

OPEN

3. Before Starting Source/Measurement

Step 1: Remove the lead cables and AC adapter and turn off the cali-

brator 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.

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

WARNING

● Make sure the voltage of the AC power source matches the rated supply voltage of the AC adapter, before connecting the A C adapter to the A C po wer source.

● 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 key once when the power is off turns on the calibrator.

Pressing the 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.

Before Starting Source/Measurement

NOTE

When operating the calibrator on batteries, disconnect the AC adapter plug from the instrument. Once y ou 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

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

the

TIP

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

key once again.

■ 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, 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.”

key. The LCD stops blinking and

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.

NOTE

The backlight automatically turns off approximately one minute later. To turn on the backlight again, press the key once again.

Before Starting Source/Measurement

IM CA71-E 3-7

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

Measurement Category Description Remarks

ICAT. I For measurement performed

on circuits not directly connected to MAINS.

II CAT. II For measurement performed Appliances, portable

on circuits directly connected equipments, etc. to the low voltage installation.

III CAT. III For measurement performed Distribution board,

in the building installation. circuit breaker, etc.

IV CAT. IV For measurement performed Overhead wire,

at the source of low-voltage cable systems, etc. installation.

Internal Wiring

Distribution

CAT. III

Entrance Cable

CAT. IV

Board

CAT. I

Fixed Equipment, etc.

CAT. II

Equipment

Outlet

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.

Before Starting Source/Measurement

IM CA71-E 3-9

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.

CAUTION

• Do not apply any voltage to the output terminals for ranges other than 20 mA SINK. Otherwise, the internal circuitry may be damaged.

• 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.

Source

IM CA71-E 4-1

4.1 Connecting Cables to Terminals

Black BlackRed

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

4.2.1 Sourcing DC Voltage or DC Current Signal

Step 1: Using the Function selector switch, select the desired source

function from

Step 2: The LCD shows the default value and unit of the source func-

tion.

, , , and .

Step 3: Set the output value digit by digit using each pair of

output setting keys. Each pair of 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 fault value (0).

Step 4: Pressing the

to change from DC voltage or current signal between the output terminals.

Step 5: To turn off the output, press the

appears on the LCD and the output terminals are open-circuited.

and keys corresponds to each digit of the

and key increases or

key initializes the output setpoint to the de-

key causes the indicator on the LCD

to . The calibrator sources the preset

key once again. The

and

Source

IM CA71-E 4-3

4.2 Sourcing DC Voltage, DC Current or SINK Current Signal

TIP

If either of the following cases applies, the protection circuit works to tur n 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 corre-

spond 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 ⇔ 20 mA. Use the pairs of make fine adjustments, as the keys let you set the decimals in

normal resolution. Pressing the setpoint to the default value (4.00).

and keys for the decimals to

key initializes the signal

Step 3: Pressing the

to change from

key causes the indicator on the LCD

to . The calibrator sources the preset

4–20 mA current signal between the output terminals.

Step 4: To turn off the output, press the

key once again. 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.

24V DC

Distributor

AC or DC power supply

1-5 V output

HLmA HL

MEASURE

Drawing SINK Current

SOURCE

CA71

4-20 mA

Step 1: Before connecting to the terminals, select with the source

range setting rotary switch.

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.

Step 3: Turn on the external power source and press the

The

indicator on the LCD changes from to . The

key.

calibrator sources the preset current value of the 20 mA SINK function between the output terminals.

Step 4: To turn off the output, press the

key once again. The appears on the LCD and the output terminals are open-circuited.

Source

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 considerabl y. 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

4-20 mA

Using As a Loop Power Supply

LmA H L

MEASURE SOURCE

24 V output

CA71

AC adapter

24V

4-6 IM CA71-E

4.3

Sourcing Resistance or RTD Signal

4.3 Sourcing Resistance or RTD Signal

• 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.

Source

◆ 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'

SOURCE

CA71

Three-wire Connection for Resistance Signal Source

IM CA71-E 4-7

Three-wire measuring equipment

4.3

Sourcing Resistance or RTD Signal

Step 1: Using the function selector switch, select .

Step 2: Using the

cycles through the 400 Ω, PT100 and JPT100 options.

Step 3: Set the output value digit by digit using each pair of

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. Holding down the

key continuously changes the digit in question. Pressing

the

key initializes the output setpoint to the default value

(0).

Step 4: Pressing the

to change from resistance value between the output terminals.

Step 5: To turn off the output, press the

appears on the LCD and the output terminals are open-circuited.

key, select the range. Pressing the key

key causes the indicator on the LCD

to . The calibrator sources the preset

key once again. The

and

4-8 IM CA71-E

4.4 Sourcing Thermocouple (TC) Signals

4.4.1 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 1: Insert the RJ sensor into the R.J.INPUT connector of the cali-

brator. 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.

Step 2: Using the function selector switch, select

Step 3: Using the

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.

Step 5: Set the output value digit by digit using each pair of

output setting keys. 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 Pressing the

fault value (600°C for a type-B thermocouple).

key, select the type of thermocouple. Select

and keys corresponds to each digit of the

key initializes the output setpoint to the de-

and

Source

IM CA71-E 4-9

4.4 Sourcing Thermocouple (TC) Signals

Step 6: Pressing the key causes the indicator on the LCD

to change from

to . A thermoelectromotive force based on the temperature detected by the RJ sensor develops between the output terminals.

Step 7: To turn off the output, press the

key once again. 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.

Step 3: Set the output value digit by digit using each pair of

or key continuously changes the digit in question.

the Pressing the fault value (600°C for a type-B thermocouple).

Step 4: Pressing the

to change from equivalent to the preset temperature develops between the output terminals.

Step 5: To turn off the output, press the

appears on the LCD and the output terminals are open-circuited.

and keys corresponds to each digit of the

or key increases or

key initializes the output setpoint to the de-

key causes the indicator on the LCD

to . A thermoelectromotive force (mV)

key once again. The

and

Source

IM CA71-E 4-11

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

Frequency-based signal

Source of number of pulses

OFF ON 1 2 3 n

Press “ ” key

Providing Pulse Output

4.5.1 Sourcing a Continuous Pulse Train

Step 1: Using the function selector switch, select . The LCD

shows the default frequency

Continued

Automatically turned off

n = Preset number of pulses

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.

Step 3: 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 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 Pressing the

key initializes the output setpoint to the de-

fault value (differs depending on the frequency range).

Step 4: Pressing the

mode. The LCD provides a reading of

key once switches to amplitude setting

4-12 IM CA71-E

4.5 Sourcing Pulse Signals

Step 5: Set the output value digit by digit using each pair of and

or key continuously changes the digit in question.

the Pressing the fault value (0.1 V).

Step 6: Press the

Then, press the key one more time to revert to frequency setting mode.

and keys corresponds to each digit of the

or key increases or

key initializes the output setpoint to the de-

key once again to show on the LCD.

Source

Step 7: Pressing the

to change from ous pulse train with the preset frequency and amplitude between the output terminals.

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 the key. Then, change the frequency range using the key.

key causes the indicator on the LCD

to . The calibrator sources a continu-

key once again. The

IM CA71-E 4-13

4.5 Sourcing Pulse Signals

4.5.2 Sourcing the Preset Number of Pulses (Pulse Cycle)

Step 1: Using the function selector switch, select . The LCD

shows the default frequency

Step 2: Using the key, set the frequency range. Each press of

the kHz options.

key cycles through the 500.0 Hz, 1000 Hz and 10

Step 3: Set the output value digit by digit using each pair of

or key continuously changes the digit in question.

the Pressing the fault value (differs depending on the frequency range).

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 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).

and keys corresponds to each digit of the

or key increases or

key initializes the output setpoint to the de-

key once switches to amplitude setting

or key increases or

and

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. Holding down the

in question. Pressing the setpoint to the default (

sourcing continuous pulse trains.

or key continuously changes the digit

key initializes the output

), thus reverting to the mode of

Step 8: Pressing the

to change from number of pulses with the preset frequency and amplitude between the output terminals.

Step 9: When source is complete, the calibrator automatically turns

off the output and ceases operation. The LCD and the output terminals are open-circuited.

TIP

To stop sourcing pulses halfway, press the key when pulse output is in progress. The appears on the LCD and the output terminals are open-circuited.

key causes the indicator on the LCD

to . The calibrator sources the preset

appears on the

Source

IM CA71-E 4-15

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

Step 2: Using the key, set the frequency range. Each press of

the kHz options.

Step 3: Set the output value digit by digit using each pair of

Step 4: Pressing the

mode. The LCD provides a reading of

Step 5: Changing the reading of to with the key causes the

calibrator to enter contact output mode.

Step 6: Press the

Then, press the quency setting mode.

key cycles through the 500.0 Hz, 1000 Hz and 10

and keys corresponds to each digit of the

or key continuously changes the digit in question.

key initializes the output setpoint to the de-

key once switches to amplitude setting

key once again to show on the LCD.

key one more time to revert to fre-

or key increases or

. The LCD

and

4-16 IM CA71-E

4.5 Sourcing Pulse Signals

Step 7: Pressing the key causes the indicator on the LCD

to change from at the preset frequency.

to . The output terminals turn on and off

Step 8: To turn off the output, press the

appears on the LCD and the output terminals are open-circuited.

key once again. The

NOTE

• The contact has polarities. Alwa ys connect the positive side to the H output terminal of the calibrator and the negative side to the L output terminal.

• 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 (

The divided output function ( setpoint of a voltage, current, resistance, thermocouple or RTD signal. Thus, the output value is defined as: Output value = Main setpoint × (

Keys and labels related to divided output function (

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.

n/m

) outputs a value

n/m

)

n/m

)

n/m

times the

)

Step 2: Using each pair of

Step 3: Press the key to enter the divided output (

The LCD shows sents the value of n and the lower-order two digits the value of

Step 4: Using a pair of or keys, set the value of m. The variable

can be set to a value from 1 to 19.

Step 5: Using a pair of or keys, change the value of n. An

output value cording to the setpoint of value from 0 to

n/m

or keys, set the main setpoint.

n/m

) mode.

. The higher-order two digits repre-

times the main setpoint can be obtained ac-

. The variable n can be set to a

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

n/m

setpoint) × (

) signal between the output terminals for each

range selected.

)

Step 7: To turn off the output, press the

key once again. The appears on the LCD and the output terminals are open-circuited.

Step 8: Pressing the

n/m

put (

TIP

To change the main setpoint, temporarily cancel the divided output ( the main setpoint once again. Then, place the calibrator in the divided output ( mode once again.

) mode.

key one more time cancels the divided out-

n/m

) mode. Set

n/m

Source

)

IM CA71-E 4-19

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 tem-

the perature.

◆ When the Temperature (Thermocouple or RTD) Range Is Selected

• 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.

• Pressing the tected by the RJ sensor connected to the calibrator or the internal temperature of the calibrator.

• Pressing the setting mode.

key once allows you to monitor the electromotive

key once again changes to the temperature de-

key one more time reverts to the initial normal

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 temper ature 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.

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 at-

tached to the input terminals is 30 Vpeak maximum. To avoid electrical shoc k, do not use the terminal adapter for measuring any circuit voltage exceeding the maximum voltage to ground.

TIP

•With the 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 - - - - -.

Measurement

IM CA71-E 5-1

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 termi-

nals 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 termi-

nals 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 termi-

nals. 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."

Terminal adapter

WARNING

The allowable voltage to ground when the included terminal adapter is attached to the input terminals is 30 Vpeak maximum.

Lead cables for measurement (RD031)

(99021)

Black

Red

Black

Measurement

IM CA71-E 5-3

5.2

Measuring 300 V AC-range Voltage, DC Voltage, AC Voltage or DC Current

5.2 Measuring 300 V AC-range Voltage, DC Voltage, AC Voltage or DC Current

5.2.1 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 con-

nected 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

function you want to use from

Step 2: Using the key, select either DC or AC. The DC or

symbol appears on the LCD.

5.2.3 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.

and .

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

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 -

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. Press-

ing the key cycles through the 100 mV, K, E, J, T, R, B, S, N, L and U options.

TIP

• 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 symbol.

Measurement

IM CA71-E 5-7

5.5 Measuring Frequency or Pulses

5.5.1 Operating the Calibrator for Frequency Measurement

Step 1: Using the function selector switch, select . 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

key, select 100 Hz, 1000 Hz or 10 kHz.

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.

Step 3: The

standby-for-counting state. The calibrator begins counting pulses the moment the state.

indicator turns on and the calibrator goes into a

key is pressed to cancel the hold

5-8 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

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)."

Measurement

IM CA71-E 5-9

6. Memory Functions

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.

1. Saving to Memory (MEM SAVE)

You can save data to memory.

2. 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.

3. Clearing Memory (MEM CLEAR)

You can clear data stored in memory.

4. 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."

Memory Functions

Keys and labels related to memory function

IM CA71-E 6-1

6.1 Saving Data into Memory

6.1.1 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.

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

number, press the indicator shows a memory number one count larger than the previous one.

Step 4: Pressing the key saves the sourced and measured

(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 memor y mode (saving/reading), press the key one more time. (Executing the MEM SAVE function automatically cancels the memory mode.)

key saves the sourced and measured

key once again. Now the MEM No.

6-2 IM CA71-E

(Case I)

6.1 Saving Data into Memory

ndicates the memory number with which data is already saved.

All these are not yet used.

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 49 50

MEM No.07

(Case II)

Example of Key Operation

Working with the MEM SAVE Function

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 49 50

Press the key.

Press the key once again.

Press the key six times.

Press the key.

Indication when selected

All these are not yet used. These are not yet used.

MEM No.14

Data is saved into the area with memory number 14 and the memory mode is cancelled.

MEM No.15

MEM No.21

Data is saved into the area with memory number 21 and the memory mode is cancelled.

Indication of the selection

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

" for source is stored in memory.

n/m

), the output value "setpoint

Memory Functions

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 indicator on the LCD turns on. Step 2: Using the pair of key, select the desired memory

number (address).

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 memor y mode (saving/reading), press the key one more time. (Executing the MEM SAVE function automatically cancels the memory mode.)

key saves the sourced and measured

6.1.3 Overwriting Data in Memory

Step 1: Press the key. Step 2: Using the pair of key, select the desired memory

number (address).

Step 3: Press the Step 4: Pressing the

memory number.

key. The LCD shows 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

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 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.)

Step 2: Pressing the

to blink, indicating the calibrator is reading from memory.

key causes the on-screen indication

Memory Functions

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 key or the key one more time.

•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

key, select the memory number

6.3 Clearing Data in Memory

6.3.1 Clearing Data by Selecting Desired Memory Number

Step 1: Press the key once. The indicator on the LCD

turns on.

Step 2: Using the pair of

whose data you want to clear.

Step 3: Pressing the

cation (no.88 indicates object )

Step 4: Pressing the key once again clears the data with the se-

lected 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.

key, select the memory number

key causes the LCD to show the alarm indi-

6-6 IM CA71-E

6.3 Clearing Data in Memory

6.3.2 Clearing All In-Memory Data Globally

Step 1: Press the key once. The indicator on the LCD

turns on.

Step 2: Hold down the

shows the

Step 3: Pressing the key once again clears all of the data in

memory.

TIP

•To cancel clearing the data after the alarm indication is given, press the key. The calibrator reverts to memory mode (saving/reading).

key for at least five seconds. The LCD

alarm indication.

ALL CLEAr alarm indication

6.4 Sending Out Data from Memory - CA71 only -

See Chapter 8, "Communication Function."

Memory Functions

IM CA71-E 6-7

7. Functions Provided by DIP Switch

OPEN

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.

CAUTION

Turn off the calibrator before you change the DIP switch configuration.

Functions Provided by DIP Switch

DIP Switch

Position

1 Sweep 2 Speed

3 INT RJ

4 IPTS-68 5 No use

6 Temp 7 Contact In

8 Auto P off

Selects the sweep or auto-step function. Changes the speed setpoint of the sweep or auto-step function. Selects the internal reference junction compensation for TC signal

generation. Selects the IPTS-68 temperature scale for temperature signal

generation or measurement. Denotes the position is not used. OFF Selects contact input based operation for pulse measurement. Cancels the automatic power-off feature during battery-driven

operation.

1234567

Description

Factory Setting

OFF

(left-side)

(right-side)

DIP switch

IM CA71-E 7-1

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.

Setpoint

Sourced-value reading

The SOURCE OFF

indication blinks.

Actual output

OFF

SOURCE ON key operation

Sweep Mode Operation

Press

(ON)

OFF

Press

(ON)

Press

When the SOURCE ON key is pressed at midpoints during a change in the output.

Press Press

OFF

Step 1: Press the 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 (volt-

age, 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.

Step 7: Pressing the

key initiates sweeping and the output value

begins to increase.

• The LCD shows

and the lower limit (default) for 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.

Step 8: Pressing the

key once again causes the output value to 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

the

key.

Functions Provided by DIP Switch

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

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

n/m

the divided output function (

Sourced-value reading

Setpoint

OFF

SOURCE ON key operation

Auto Step Operation (when the default of n is set to 1)

Press

(ON)

Stepping time setpoint

) is selected.

Actual output

Step 1: Press the 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 (volt-

age, 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.

Step 7: Press the

key. The indication on the LCD changes

and the

n/m

symbol turns on.

7-4 IM CA71-E

7.2 Auto Step Function

Step 8: Using each pair of and keys, set the value of the de-

nominator m and the starting setpoint of the enumerator n.

n/m

(See Section 4.6, "Divided Output Function ( details.) The starting setpoint is the minimum of the variable for auto step operation.

Step 9: Pressing the key initiates the automatic stepping of the

n/m

divided output ( Assuming the starting value of the variable cyclically changes with the variable lowing manner.

= 1 → 2 → 3 → · · · (m – 1) → m → (m – 1) → · · · → 2 → 1

→ 2 → 3 → · · ·

Step 10: To quit the auto step function, turn off the calibrator by press-

ing the position. Note that disabling the divided output mode ( before placing switch 1 back in the OFF position enters sweep mode.

), as described below.

as n changes in the fol-

key. Place switch 1 back in the OFF (left-side)

), for further

is 1, the output

n/m

Functions Provided by DIP Switch

)

TIP

• Pressing the key to change to the SOURCE OFF state pauses the auto step operation.

•To execute the auto step function again, press the key. The auto step operation resumes from the value of n shown on the LCD.

IM CA71-E 7-5

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 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

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.

key to turn off the calibrator.

key.

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

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.

7.5 Switch Not Used

7.6 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 input function, the By placing the switch in the OFF position, you can measure normal pulse.

(contact) symbol appears on the LCD.

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.

Functions Provided by DIP Switch

IM CA71-E 7-7

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.

• In talk-only or printer mode, you can output the source setpoint and measured value at preset intervals.

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

Communication Function

IM CA71-E 8-1

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 Step 3: Press the key to confirm your mode selection. If you set

the mode to

is indicated, each press of the key outputs one

data item.

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 key once again while simultaneously holding down the key.

•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.

and keys, select , or .

or , the LCD shows . When the

and keys with

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).

*: For a 0-second interval, each press of the

item. For other intervals, pressing the communication.

key outputs one data

key initiates or terminates

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 mode is disabled if you select or .

8.4 Data Format

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

8.5 Data Structure

The calibrator's program has the following data structure.

Command + Parameter + Delimiter

Command: Defined by one to three alphabetical upper-case let-

ters. Parameter: A string of ASCII-code numerals or characters. Delimiter: Fixed to CrLf.

Communication Function

IM CA71-E 8-3

8.6 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 cur-

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 ( ND Sets n/m values in divided output (

TE Sets the temperature monitor display for sourced TC/RTD range/

PU Sets the display for sourced pulse range/queries the current setting.

rent setting.

n/m

) mode/queries the current setting.

n/m

ting.

queries the current setting. (TC, RTD mode only)

) mode/queries the current set-

8-4 IM CA71-E

8.7 Detailed Description of Commands

Turns

Syntax for setting

BLm<delimiter>

Syntax for query

BL?<delimiter> ⇒ Response: BLm<delimiter>

Description of parameter

m=0: Off m=1: On

Syntax for setting

DWm<delimiter>

Description of parameter

m: Specifies a digit 1 (the lowest digit) to 5 (the highest digit)

Syntax for setting

UPm<delimiter>

Description of parameter

m: Specifies a digit 1 (the lowest digit) to 5 (the highest digit)

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

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

the back lighting on and off /queries the

current setting.

Moves down the “m -th” digit of the sourced setpoint by one digit.

Moves up the “m -th” digit of the sourced setpoint by one digit.

Enables/Disables current setting.

Enables/Disables setting.

the output data header/queries the

data hold mode/queries the current

When normal

condition

When normal

condition

When normal

condition

When normal

condition/adjustment

When normal

condition

Communication Function

IM CA71-E 8-5

8.7 Detailed Description of Commands

MF Queries the measurement function.

Syntax for query

MF? <delimiter> ⇒ Response: MFm<delimiter>

Description of parameter

m: Measurement function

m=0: 300V AC m=1: 100V m=2: 10V m=3: 1V m=4: 100mV m=5: Resistance

Syntax for setting

Syntax for query

Description of parameter

Syntax for setting

Syntax for query

Description of parameter

m=6: Frequency m=7: Current

MO On/Off of measurement/queries the current setting.

MOm<delimiter>

MO?<delimiter> ⇒ Response: MOm<delimiter>

m: On/Off condition

m=0: Off m=1: On

Sets

MRm<delimiter>

MR? <delimiter> ⇒ Response: MRm<delimiter>

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=2: TcE m=3: TcJ m=4: TcT m=5: TcR m=6: TcB m=7: TcS m=8: TcN m=9: TcL m=10: TcU [100mV] (When adjustment) m=0: 100mV DC m=1: TcK m=2: TcE m=4: TcT [Ω] m=0: 400 Ω m=1: Pt100 m=2: JPt [Freq ] m=0: 100Hz m=1: 1kHz m=2: 10kHz [mA]

the measuring range/queries the current

setting.

m=0: 20mA m=1: 100mA

When normal

condition

When normal

condition/adjustment

When normal

condition/adjustment

8-6 IM CA71-E

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

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.

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.

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.

When normal

condition

Syntax for setting

OS<delimiter>

Response

Measure m<CrLf> m= On/Off Function m<CrLf> m= Measurement function Range m<CrLf> m= Measuring range Source m<CrLf> m= On/Off Function m<CrLf> m= Source function Range m<CrLf> m= Source range Data m<CrLf> m= Sourced setpoint Light m<CrLf> m= On/Off

When normal

condition/adjustment

8.7 Detailed Description of Commands

IM CA71-E 8-7

Communication Function

8.7 Detailed Description of Commands

SD Sets sourced setpoint/queries the current setting.

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 Queries the source function.

Syntax for query

SF? <delimiter> ⇒ Response: SFm<delimiter>

Description of parameter

m: Function

m=0: 30V m=1: 10V m=2: 1V m=3: 100mV m=4: Resistance m=5: Pulse m=6: 20mA m=7: 4 to 20mA

Syntax for setting

Syntax for query

Description of parameter

Syntax for setting

Syntax for query

Description of parameter

m=8: 20mASINK

SO On/Off of source output/queries the current setting.

SOm<delimiter>

SO? <delim iter >

m: Condition of generation

m=0: Off m=1: On

Sets

SRm<delimiter>

SR?<delimiter> ⇒ Response: SRm<delimiter>

m: sourcing range

setting.

[100mV] (When normal condition) m=0: DC 100mV m=1: TcK m=2: TcE m=3: TcJ m=4: TcT m=5: TcR m=6: TcB m=7: TcS m=8: TcN m=9: TcL m=10: TcU [100mV] (When adjustment) m=0: DC 100mV m=1: TcK [Ω] m=0: 400Ω m=1: Pt100 m=2: JPt [Freq ] m=0: 500Hz m=1: 1kHz m=2: 10kHz

Response: SOm <delimiter>

⇒

the sourcing range/queries the current

When normal

condition

When normal

condition

When normal

condition/adjustment

When normal

condition/adjustment

8-8 IM CA71-E

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

Sets

the sourced setpoint/queries the current

setting.

When adjustment

Syntax for setting

CDm<delimiter>

Syntax for query

DC? <delimiter> ⇒ Response: DCm<delimiter>

Description of parameter

m: Sourced setpoint (8 digits) 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

Syntax for setting

CPm<delimiter>

Description of parameter

m: Adjustment point

m=0: FS adjustment m=1: Zero adjustment

CW 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.

8.7 Detailed Description of Commands

IM CA71-E 8-9

Communication Function

8.7 Detailed Description of Commands

CMF Queries the measurement function. When adjustment

Syntax for query

CMF?<delimiter> ⇒ Response: CMFm<delimiter>

Description of parameter

m: Measurement function

m=0: AC 300V m=1: 100V m=2: 10V m=3: 1V m=4: 100mV m=5: Resistance

Syntax for query

Description of parameter

Syntax for query

Response:

Description of parameter

m=6: Frequency m=7: Current

CSF Queries the source function. When adjustment

CSF?<delimiter> ⇒ Response: CSFm<delimiter>

m= Function

m=0: 30V m=1: 10V m=2: 1V m=3: 100mV m=4: Resistance m=5: Pulse m=6: 20mA m=7: 4-20mA m=8: 20mASINK

OM Queries memory data.

OMm<delimiter>

abcde, fghij [, fghij ] <delimiter> <Header section of measured value>

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

d = Measured value, mantissa part (7 digits) e = Measured value exponent part (E - 3 / E+0 / E+3)

f= V: Voltage A: Current O: Resistance T: Temperature F: Frequency 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)

m: Number of memory 1 to 50

When normal

condition

8-10 IM CA71-E

Sets divided output (

n/m

) mode/queries the current

setting.

When normal

condition

Syntax for setting

MNm<delimiter>

Syntax for query

MN?<delimiter> ⇒ Response: MNm<delimiter>

Description of parameter

m: n/m mode

m=0: Off m=1: On

Sets

n/m values in divided output (

n/m

) mode/

queries the current setting.

When normal

condition

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)

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

Sets the display for source pulse range/queries the current setting.

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

8.7 Detailed Description of Commands

IM CA71-E 8-11

Communication Function

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 the POWER switch is turned on.

The LCD shows everything except for the measured value.

The SOURCE indicator remains set to OFF even if the SOURCE ON key is operated for signal source.

The output cannot be turned on for signal source, or no signal is output even if the output is turned on.

The measured and sourced signal values are abnormal.

The calibrator cannot be configured or controlled via RS232 interface-based communication.

The hold function of the MEASURE mode does not work at all.

The LCD shows Err60 at poweron.

–When the calibrator is operated on batteries

• 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.

•Check if the MEASURE OFF key for turning on/ off the MEASURE mode is set to OFF.

•When in voltage signal source, check if the load current is beyond the specified limits.

•When in current signal source, check if the load resistance is too large.

• The built-in fuse may blow off if any abnormal voltage level is applied to the output terminals. If this is the case, the calibrator needs repair.

•Check if the signal carries noise.

•When in resistance signal source, check if the input stage of the device under test contains a capacitor with an excessively large capacitance.

•Make sure the communication parameter settings are correct.

• Check if the communication mode is set to

tonLy

• The calibrator needs repair.

Troubleshooting

IM CA71-E 9-1

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.

Source Functions

Function to Be Adjusted

DCV

DCA

SINK

Ω/1 mA

Ω/5 mA

Standard’s Name

Digital multimeter (DMM)

Note: Also use a 100 Ω standard resistor for the DCA and SINK functions and a highprecision 5 mA current source for the Ω/5 mA function.

Range to Be Adjusted

100 mV 1 V 10 V 30 V

20 mA

400 Ω

Measuring Range

110 mV

1.1 V 11 V 33 V

22 mA

20 mA

440 Ω

2.2 V/5 mA

±(0.002% + 1.5 µV) ±(0.002% + 10 µV) ±(0.002% + 100 µV) ±(0.002% + 1 mV)

±(0.002% + 0.3 µA)

±(0.0025% + 0.01 Ω)

±(0.0025%) ±(0.0025%)

RemarksAccuracy

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.

DMM’s resistance range (1 mA)

High-precision current source (5 mA)

DMM’s voltage range

Method of Calibrator Adjustment

IM CA71-E 10-1

10.1 Calibration Standard Selection and Environmental Requirements

Measurement Functions

Function to Be Adjusted

DCV

DCA

Ω

ACV

Standard’s Name

High-precision calibrator

Decade resistance box

AC calibrator or AC voltage source

Range to Be Adjusted

100 mV 1 V 10 V 30 V

20 mA 100 mA

– 1 V

10 V 100 V 300 V

Measuring Range

100 mV 1 V 10 V 30 V

20 mA 100 mA

400 Ω 1 V

10 V 100 V 300 V

±(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%)

RemarksAccuracy

◆ 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.

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.)

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.

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

Table 10.1 Adjustment Points of Source Functions

Power supply

CAL FSCAL 0

100 mV 1 V 10 V 30 V 20 mA 20 mA 400 Ω 400 Ω

See the figure below. See the figure below. Four-wire connection See the figure below.

CA71

Remarks

H L

5mA

Range

100 mV 1 V 10 V 30 V 20 mA 20 mA SINK 400 Ω/1 mA 400 Ω/5 mA

*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.

Adjustment Points

0 0 0 0 0

0.1 mA 0 0

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.

20 mA output

Standard resistor

SINK

CA71

Hook-ups for Adjustment

100 Ω

20mA

SINK

20 mA and SINK ranges 400 Ω/5mA

Voltage range

24V

DMM

Method of Calibrator Adjustment

DMM

Voltage range

High-precision current source

Step 1: Press the key while simultaneously holding down the

key. The LCD shows .

Step 2: Pressing the

key enters the source CAL mode. 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

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,

using the lowest-order pair of ing so that it matches the given CAL 0 adjustment setpoint in 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.

and keys, adjust the read-

and

Step 6: Press the

The CAL indicator on the LCD changes to

key to confirm the CAL 0 adjustment setpoint.

, setting the cali-

brator ready for full-scale adjustment.

Step 7: Using the lowest-order pair of

and keys, adjust the reading of the calibration standard so that it matches the given CAL FS adjustment setpoint in Table 10.1.

Step 8: Press the

key to confirm the CAL FS adjustment setpoint. The 0 and FS symbols on the LCD blink.

Step 9: Pressing the

once again saves 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

Adjusting the 400 Ω range requires drawing two types of resistance-mea- suring current – 1 mA and 5 mA – from an external device. Adjust the range separately for each of these currents.

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 fig- ure (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

IM CA71-E 10-5

10.3 Adjusting Measurement Functions

Table 10.2 Adjustment Setpoints of Measurement Functions

Range

DC 100 mV DC 1 V DC 10 V DC 100 V DC 20 mA DC 100 mA 400 Ω AC 1 V AC 10 V AC 100 V AC 300 V

*2: Apply the reference input signals listed above from the calibration standard.

Adjustment Setpoint

– – – – – –

0 Ω

0 V 0 V 0 V 0 V

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.

CAL FSCAL 0

100 mV 1 V 10 V 100 V 20 mA 100 mA 380 Ω 1 V/50-60 Hz 10 V/50-60 Hz 100 V/50-60 Hz 300 V/50-60 Hz

Remarks

Three-wire connection

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

Step 3: Pressing the

key enters the measurement CAL mode. 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

key causes the LCD to show

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.

Step 5: Pressing the

setpoint. At this point, the

key confirms the CAL FS adjustment

symbol blinks.

Step 6: Pressing the once again saves the adjustment setpoint in

memory.

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.

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 key, change DC 20 mA ➝ DC 100 mA.

Method of Calibrator Adjustment

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

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 ad-

justed.

Step 5: Pressing the

The CAL indicator on the LCD changes to brator 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.

Step 7: Pressing the

setpoint. At this point, the 0 and FS symbol blinks.

Step 8: Pressing the

memory.

key enters the measurement CAL mode.

key confirms the CAL 0 adjustment setpoint.

key confirms the CAL FS adjustment

once again saves the adjustment setpoint in

key causes the LCD to show

, setting the cali-

NOTE

• 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 -

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.

10.5 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

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.

Terminal adapter

WARNING

The allowable voltage to ground when the included terminal adapter is attached to the input terminals is 30 Vpeak maximum.

Lead cables for measurement (RD031)

(99021)

Red

Black

Red

Black

Red

Black Black

Lead cables for source (98020)

Fuse

(A1501EF)

RS232 communication cable (91017)

(for CA71 only)

IM CA71-E 11-1

RJ sensor (B9108WA)

AC adapter (A1020UP, A1022UP or B9108WB)

Using Accessories

12.Specifications

(1) Signal sourcing unit range and accuracy (for both CA51 and CA71)

Parameter

DC voltage

DC current

mA SINK Resistance

RTD

TC *

Frequency, pulse

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).

*5: Frequency (interval between one pulse and another) and amplitude during pulse cycle source may have the same range as during

Reference

100 mV 1 V 10 V 30 V 20 mA 4–20 mA 20 mA 400 Ω Pt100 * JPt100 K E

T N L U

500 Hz 1000 Hz 10 kHz Pulse cycle *

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). frequency source.

Range

-10.00–110.00 mV 0–1.1000 V 0–11.000 V 0–30.00 V 0–24.000 mA 4/8/12/16/20 mA

0.1–24.000 mA 0–400.00 Ω

-200.0–850.0°C

-200.0–500.0°C

-200.0–1372.0°C

-200.0–1000.0°C

-200.0–1200.0°C

-200.0–400.0°C

-200.0–1300.0°C

-200.0–900.0°C

-200.0–400.0°C

0–1768°C

600–1800°C

1.0–500.0 Hz 90–1100 Hz

0.9 kHz–11.0 kHz

1–99,999 cycles

Accuracy (23±5°C per year) ±(0.02% + 15 µV) ±(0.02% + 0.1 mV) ±(0.02% + 1 mV) ±(0.02% + 10 mV)

±(0.025% + 3 µA)

±(0.05% + 3 µA) ±(0.025% + 0.1 Ω)

±(0.025% + 0.3°C)

±(0.02% + 0.5°C) (-100°C or greater) ±(0.02% + 1°C) (-100°C or less) ±(0.02% + 0.5°C) (0°C or greater) ±(0.02% + 1°C) (0°C or less) ±(0.02% + 2.5°C) (100°C or less) ±(0.02% + 1.5°C) (100°C or greater) ±(0.02% + 2°C) (1000°C or less) ±(0.02% + 1.5°C) (1000°C or greater) ±0.2 Hz ±1 Hz ±0.1 kHz

–

±(setting percentage plus µV, mV, mA, Ω or °C)

Resolution

10 µV

Maximum output: 5 mA

0.1 mV Maximum output: 10 mA

1 mV

Maximum output: 10 mA

10 mV 1 µA

Maximum load: 12 V

4 mA

External power supply: 5–28 V

1 µA

0.01 Ω

Excitation current: 0.5–5 mA * If 0.1 mA, add 0.25 Ω or 0.6°C. Subject

0.1°C

device input capacitance: 0.1 µF or less

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

1°C

Output voltage: +0.1–+15 V (zero base waveform)

0.1 Hz 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) Maximum open/close voltage/current: +28 V/50

1 cycle

Remarks

Specifications

IM CA71-E 12-1

12. Specifications

(2) Measurement unit range and accuracy (for both CA51 and CA71)

Parameter

DC voltage

DC current

Resistance

AC voltage

Frequency, pulse

Temperature coefficient: Accuracy shown above × (1/5)/°C

Reference

100 mV 1 V 10 V 100 V 20 mA 100 mA 400 Ω 1 V 10 V 100 V 300 V 100 Hz 1000 Hz 10 kHz CPM CPH

Range

0–±110.00 mV 0–±1.1000 V 0–±11.000 V 0–±110.00 V 0–±24.000 mA 0–±100.00 mA 0–400.00 Ω 0–1.100 V 0–11.00 V 0–110.0 V 0–300 V

1.00–100.00 Hz

1.0–1000.0 Hz

0.001–11.000 kHz 0–99,999 CPM 0–99,999 CPH

(3) Measurement unit (temperature; CA71 only) range and accuracy

Parameter

TC *

RTD

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).

Reference

K E J T N

L U R S B

Pt100 * JPt100

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).

Range

-200.0–1372.0°C

-200.0–1000.0°C

-200.0–1200.0°C

-200.0–400.0°C

-200.0–1300.0°C

-200.0–900.0°C

-200.0–400.0°C 0–1768°C 0–1768°C 600–1800°C

-200.0–850.0°C

-200.0–500.0°C

Accuracy: ±(reading percentage plus µV, mV, µA, Ω or dgt (digit))

Accuracy (23±5°C per year) ±(0.025% + 20 µV) ±(0.025% + 0.2 mV) ±(0.025% + 2 mV) ±(0.05% + 20 mV) ±(0.025% + 4 µA) ±(0.04% + 30 µA) ±(0.05% + 0.1 Ω)

±(0.5% + 5 dgt)

±(0.5% + 2 dgt)

±2 dgt

Accuracy (23±5°C per year)

±(0.05% + 1.5°C) (-100°C or greater)

±(0.05% + 2°C) (-100°C or less)

±(0.05% + 2°C) (100°C or greater) ±(0.05% + 3°C) (100°C or less)

±(0.05% + 0.6°C)

Resolution

10 µV

Input resistance: 10 MΩ or greater

0.1 mV 1 mV

Input resistance: Approximately 1 MΩ

0.01 V 1 µA

Input resistance: Approximately 14 Ω

10 µA

0.01 Ω

Accuracy during 3-wire measurement Input resistance:

1 mV

Approximately 10

0.01 V

MΩ/10 pF Input resistance:

0.1 V Approximately 1

1 V

MΩ/10 pF

0.01 Hz

Maximum input: 30 V peak Input resistance: 200 kΩ or greater

0.1 Hz Sensitivity: 0.5 V peak or greater

Contact input: Maximum 100 Hz

0.001 kHz Notes

1 CPM

CPM: Counts per minute CPH: Counts per hour

1 CPH

Accuracy: ±(reading percentage + °C)

Remarks

Resolution

0.1°C

1°C

0.1°C

Accuracy during 3-wire measurement

Input frequency: 45–65 Hz Input voltage range: 10%–100% Measurement method: Average value rectification

Remarks

12-2 IM CA71-E

■ General specifications (for both CA51 and CA71)

Signal sourcing unit response time :

Signal sourcing unit voltage limiter : Signal sourcing unit current limiter : Divided output (n/m) function : Auto-step output function :

Sweep function : Memory function :

Measuring unit maximum input : Current terminal input protection :

Measuring unit ground voltage : Measurement display updating rate : Serial interface :

Display : Backlight :

Power supply : Battery life :

Consumed power : Auto-power-off function :

Applicable standards :

Insulation resistance : Withstand voltage : Operating temperature and humidity ranges

Storage temperature and humidity ranges

Approximately 1 second (time between start of voltage change and when voltage enters accuracy range) Approximately 32 V Approximately 25 mA Output = setting × (n/m) n = 0–m; m = 1–19; n ≤ m n value sent automatically when n/m function selection is selected (two options: approximately 2.5 seconds/step or approximately 5 seconds/step) Sweep time (two options: approximately 16 seconds or approximately 32 seconds) 50 value sets (sourced and measured values are stored as value sets with the same address (up to 50 value sets can be stored)) Voltage terminal: 300 V AC Current terminal: 120 mA DC Fuses: 125 mA/250 V Maximum 300 V AC Approximately once per second Enabled when communication cable (RS232) is connected; sold separately as optional accessory (CA71 only) Segmented LCD (approximately 76 mm × 48 mm) LED backlight; auto-off after one minute (from when LIGHT key is turned on) Four AA-size (LR6) alkaline batteries, or special AC adapter (sold separately) 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) Approximately 7 VA (using 100 V AC adapter) Approximately 10 minutes (auto-power-off can be disabled through a DIP switch setting) IEC61010-1, IEC61010-2-31 EN61326-1: 1997 + A1: 1998 EN55011: 1998, Class B, Group 1 Across input terminal and output terminal, 500 V DC, 50 MΩ or greater Across input terminal and output terminal, 3.7 kVAC, for one minute

0–50°C, 20–80% RH (no condensation)

-20–50°C, 90% RH or less (no condensation)

12. Specifications

Specifications

IM CA71-E 12-3

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

Unit: mm

(approx. inches)

193 (7.61)

Note: This figure shows the CA71, but there is no difference in exterior from the CA51.

54.5 (2.15) 51 (2.01)

120 (4.73)

113.8 (4.49)

IM CA71-E 12-5

Specifications

Yokogawa CA71, CA51 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual