Yokogawa Yokogawa CA450 Manual

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User's Manual

CA450

Process Multimeter

99 Washington Street Melrose, MA 02176

Phone 781-665-1400 Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

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

6th Edition: Aug. 2018 (YMI)

IM CA450-EN

Introduction

Thank you for purchasing our CA450 Process Multimeter.

This User’s Manual explains the functions of this Process Multimeter, as well as the operating methods and handling precautions. Before using this product, thoroughly read this manual to understand how to use it properly.

■ List of Manuals

The following manuals, including this one, are provided as manuals for the CA450. Please read all manuals. IM CA450-EN User's Manual (this manual) IM CA450-93Z2

Document for Korea

Contact information of

the following sheet. PIM 113-01Z2

Yokogawa ofces worldwide is provided on

Inquiries

List of worldwide contacts

■ Notes

• The information contained in this manual is subject to change without notice. Furthermore, the actual display ite

appearing in this manual.

• Every effort has been made to ensure the information contained herein is accurate. However, should any concerns, errors, or emissions come to your attention, or if you have any comments, please contact us.

• Copying or reproduction of any or all of the content of this manual without YOKOGAWA's permission is strictly prohibited.

ms may differ slightly from the ones

■ Registered Trademarks

“HART” is a registered trademark of the HART Communication Foundation.

IM CA450-EN i

■ Revision Information

1st Edition: October 2010

2nd Edition: February 2011

3rd Edition: March 2015 4th Edition: October 2016 5th Edition: October 2017 6th Edition: August 2018

Checking the Contents of the Package

After receiving the product and opening the package, check the items described below. If the wrong items have been delivered, if items are missing, or if there is a problem with the appearance of the items, contact your nearest YOKOGAWA dealer.

• Model and Sufx Codes

Model Sufx Code

CA450 -E

• NO. (Serial Number)

Refer to this serial number on the nameplate when contacting the vendor about the instrument. (For the model, nameplate, and serial number, see section 4.2, “Components.”)

• Standard Accessories

Make sure that the package contains all the accessories listed below and that they are all free from any damage. Standard accessories are not covered by warranty of this instrument.

AA-size alkaline batteries 4 pieces Test leads (98073) 1 set Lead cables (98064) 1 set Fuses (inside the CA450) (99042) 440 mA/1000 V 2 pieces User’s manual 1 copy Blank cover 1 piece

ii IM CA450-EN

Regarding Safe Use of This Product

WARNING

CAUTION

Note

Tip

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

The following safety symbols are used on the instrument and in the manual:

This indicates that the operator must refer to an explanation in the instruction manual in order to avoid the risk of serious injury or the loss of life.

This indicates that the operator must refer to an explanation in the instruction manual in order to avoid the risk of injury or damage to the product.

This indicates information that is essential for handling the instrument or should be noted in order to familiarize yourself with the instrument’s operating procedures and/or functions.

This indicates supplemental information for explanations.

IM CA450-EN iii

Danger! Handle with Care

WARNING

This symbol indicates that the operator must refer to an explanation in the instruction manual in order to avoid risk of injury or death of personnel or damage to the instrument.

This symbol indicates double insulation or reinforced insulation.

This symbol indicates DC voltage/current.

This symbol indicates AC voltage/current.

This symbol indicates AC and DC.

This symbol indicates a fuse.

This symbol indicates a battery.

This symbol indicates ground (earth).

■ Always observe the following instructions. Failure to do so

may result in electrical shock or other dangers that

may lead to serious injury or the loss of life.

Use the instrument Only for Its Intended Purpose

This instrument is for measuring voltage or current and generating (output) current. Do not use this instrument for other purpose.

Check the Physical Appearance

Do not use the instrument if there is a problem with its physical appearance.

Operating Environment

• Do not operate the instrument in an atmosphere where any ammable or

explosive gas ispresent.

• Avoid using the instrument if it has been exposed to rain or moisture or

if your hands are wet.

iv IM CA450-EN

WARNING

CAUTION

Test Leads and Lead cables

• Use the products provided by YOKOGAWA for this device.

• Do not use degraded or damaged test leads or lead cables. Check the continuity of the test leads and lead cables.

• When you attach or remove the test leads or lead cables or remove the case

(for example to change the batteries), be sure to remove the lead cables from the circuit under measurement.

• When you remove the case (for example to change the batteries),

be sure to remove the test leads and lead cables from the instrument.

• There are caps at the ends of the test leads. To ensure safety (safety standard EN 61010-031), be sure to put the caps on

the leads when you use them.

Damaged Signal Cable

If the signal cable (test leads and lead cables) is torn and the inner metal is exposed or if a color different from the outer sheath appears, stop using the cable immediately.

Casing

Do not use the instrument if there is any damage to the casing or when the casing is removed.

Fuses

Use fuses of the specied rating when the fuse is replaced.

Do Not Remove the Case or Disassemble

Do not open the case except when replacing batteries or fuse. Only Yokogawa service personnel are authorized to remove the casing or disassemble or modify the instrument. Do not attempt to repair the instrument yourself, as doing so is extremely dangerous. When the instrument needs an internal inspection or calibration, contact YOKOGAWA or the dealer from whom you purchased the instrument.

The instrument is for domestic use (Class B) and meets the electromagnetic compatibility requirements.

IM CA450-EN v

Concernant l’usage en toute sécurité de ce produit

AVERTISSEMENT

ATTENTION

Remarque

Conseil

Dans le cadre de l'utilisation de cet instrument, assurez-vous de respecter les mises en garde indiquées ci-dessous pour garantir une utilisation correcte et sans danger de l'instrument. Si vous utilisez l'appareil d'une autre manière que celle indiquée dans ce manuel, il est possible que cela endommage les dispositifs de protection. YOKOGAWA ne saurait en aucun cas être déclaré responsable de tout dommage résultant d'une utilisation de l'instrument ne respectant pas ces mises en garde.

Symboles utilisés sur l'instrument et dans ce manuel d’instructions:

Indique un danger. Attire l’attention sur une utilisation quipourrait engendrer des accidents susceptibles de provoquer des blessures qui peuvent éventuellement s’avérer mortelles.

Indique un danger. Attire l’attention sur une utilisation qui pourrait engendrer une blessure personnelle et/ou être préjudiciable au produit.

Indique les informations essentielles à la manipulation de l’instrument ou qui

doivent être prises en compte an de vous familiariser avec les procédures

d’utilisation et/ou l es fonctions de l’instrument.

Ce qui suit indique des informations supplémentaires pour les explications.

vi IM CA450-EN

Danger ! Manipuler avec soin.

AVERTISSEMENT

Ce symbole indique que l’opérateur doit se reporter à une explicationdonnée par le manuel d’instruction, an d’éviter tout accident susceptible de provoquer des blessures au personnel qui peuvent éventuellement s’avérer mortelles, ou de protéger l’appareil.

Ce symbole indique une double isolation ou une isolation renforcée.

Ce symbole indique une tension/intensité C.C.

Ce symbole indique une tension/intensité C.A.

Ce symbole indique le C.A. et le C.C.

Ce symbole indique un fusible.

Ce symbole indique une batterie.

Ce symbole indique la masse (terre).

■ Les précautions suivantes doivent être prises. Dans le cas contraire, des accidents susceptibles de provoquer des blessures qui peuvent éventuellement s’avérer mortelles résultant de dangers tels que des chocs électriques, ou un préjudice au produit, risquent de survenir.

Utilisez cet instrument uniquement pour l'usage auquel il est destiné.

Cet instrument est destiné à mesurer une tension ou un courant et à générer

du courant (sortie). N'utilisez pas cet instrument à d'autres ns.

Vériez l'aspect physique

N'utilisez pas cet instrument si son aspect physique présente un problème.

Environnement d’opération

• N’utilisez pas l’instrument là où un gaz ou de la vapeur (atmosphère)

inammable ou explosive quelconque est présente.

• Évitez d’utiliser l’instrument s’il a été exposé à la pluie ou à l’humidité ou si vos mains sont humides.

IM CA450-EN vii

AVERTISSEMENT

ATTENTION

Fils de test et câbles de dérivation

• Utilisez les produits fournis par YOKOGAWA pour ce dispositif.

• N'utilisez pas de ls de test ou de câbles de dérivation dégradés ou endommagés.

Vériez la continuité des ls de tes

• Lorsque vous xez ou retirez les ls de test ou les câbles de dérivation,

ou que vous enlevez le boîtier (par exemple pour changer les batteries), veillez à retirer les ls de test et les câbles de dérivation du circuit en cours de mesure.

• Lorsque vous enlevez le boîtier (par exemple pour changer les batteries),

veillez à retirer les ls de test et les câbles de dérivation de l'instrument.

• Un chapeau est fourni sur le bout d’un l de test. Utilisez un l de test avec le chapeau placé dessus pour une bonne sécurité

(normes de sécurité: EN 61010-031).

t et des câbles de dérivation.

Câble de signal endommagé

Si le câble de signal (des ls de test et des câbles de dérivation) est déchiré et que

le métal intérieur est exposé ou si une couleur différente de la gaine externe est

visible, arrêter immédiatement d’utiliser ce câble.

Boîtier

N’utilisez pas l’instrument s’il y a un dommage quelconque au boîtier ou quand le boîtier est enlevé.

Fusibles

Utilisez les fusibles avec l’évaluation spéciée quand le fusible est remplacé.

Ne retirez pas le boîtier, ne le démontez pas.

N'ouvrez pas le boîtier, sauf pour remplacer la batterie ou un fusible.

Seul le personnel qualié de YOKOGAWA est habilité à retirer le boîtier et démonter ou modier l'instrument. N'essayez pas de réparer/modier l'instrument

vous-même, car cela est extrêmement dangereux. Pour un contrôle interne ou un étalonnage de l’instrument, contacter YOKOGAWA ou le revendeur auprès duquel a été acheté l’instrument.

Cet instrument est destiné à un usage domestique (classe B) et respecte les exigences en matière de compatibilité électromagnétique.

viii IM CA450-EN

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

Checking the Contents of the Package............................... ii

Regarding Safe Use of This Product.................................iii

Concernant l’usage en toute sécurité de ce produit .....................vi

1. Overview................................................... 1

2. Operating Environment ........................................ 2

3. Specications ............................................... 4

3.1 General Specications.................................... 4

3.2 Accuracy ..............................................7

4. Operation .................................................10

4.1 Precautions before Measurement .......................... 10

4.2 Components........................................... 11

4.3

Measuring Instructions................................... 18

4.3.1

4.3.2 DC Voltage Measurement

4.3.3 Measuring Using Sensors (SENSOR)................. 19

4.3.4 Resistance Measurement (Ω) ....................... 20

4.3.5 Continuity Check

4.3.6 Diode Test

4.3.7 DC Current Measurement

4.3.8

4.3.9

4.3.10 Auto Hold Function ...............................27

4.3.11 Peak Hold Function ...............................27

4.3.12 Relative Value Display

4.3.13 MIN/MAX/AVG Function ...........................30

4.4 Output Instructions...................................... 31

4.4.1 Constant Current Output (SOURCE mode)............. 32

4.4.2 Constant Current Output (SIMULATE mode) ...........34

4.4.3

4.4.4 Current Span Setting .............................. 38

4.5 Auto Power-Off (Sleep) Function........................... 38

oltage Measurement

AC V

............................ 21

................................. 21

Loop Power Measurement..........................25

Frequency Measurement (Hz)....................... 26

Current Sweep Output............................. 36

............... 18

....................23

.................. 29

IM CA450-EN ix

4.6 Setup Function......................................... 39

4.6.1 Turning the Buzzer On and Off ......................40

4.6.2 SENSOR Mode Input, Display, and Unit Settings ........41

4.6.3 Current Span Setting for the 100 mA Range for DCmA Measurement

4.6.4

Setting the Slow Step

4.6.5

Returning the Settings to

4.7

Additional Po

4.7.1

Making

User Calibratio

5.1 Cali

5.1.1

5.1.2 Loop Power Calibration ............................48

5.2 Calibrating Output ......................................49

5.3 What to Check after Calibration............................ 51

6. Communication............................................. 52

6.1 Cable Connection and Interface Specications ................ 52

6.2 Communication Commands............................... 53

6.3 Detailed Command Descriptions ...........................55

6.4 List of Errors...........................................73

6.5

Communication Command V

6.6 Status Byte Format .....................................76

Replacing the

7.1 Replacing th

7.2

Replacing th

Calibration and

Troubleshooting ............................................

10. Sales in Each

10.1 Disposing the

10.2

How to Replace and Dispose th

10.3

Authorized R

10.4

For the Pollu Products of the People's Republic of China

Appendix (External Dimensions)................................... 84

n Function

brating Measurements

Peak Hold Calibration ............................. 48

Batteries and Fuses

e Batteries ..................................

e Fuses ....................................

After-Sales Service .............................

Country or Region

epresentative in the EEA

tion Control of Electronic and Electrical

....................................42

Time . . . . . . . . . . . . . . . . . . . . . . . . . 43

Their Factory Default Values

wer-on Functions ............................

All the LCD Elements Appear

.....................................45

................................46

alidity Table

..............................77

...............................82

Product ...................................

e Batteries

................. 44

.................... 74

................... 82

....................... 82

................... 83

.... 43

77 78 79 81

x IM CA450-EN

1. Overview

• Display

Main display: 5-digit LCD, Subdisplay: 5-digit LCD (Measured values other than current values are displayed with 4 digits.)

• Various Functions

Measurement Functions

DC voltage, AC voltage, DC current (24 V loop power supply possible), resistance, frequency, continuity check, and diode test

Output Functions

DC current (constant output, current sweep output, and SIMULATE (SINK) function)

Additional Functions

Data hold (D•H); auto hold (A•H); peak hold (P•H); auto range (Auto); range hold (Range Hold); maximum, minimum, and average value recording

and measurement; zero adjustment (Ω); relative measured value display (RELΔ, REL%); and backlight

• Communication (Optional PC communication set required)

Measurement data can be transferred to a PC through the use of a USB communication adapter and a USB cable.

• Safety

Conforms to IEC 61010-1, Safety requirements for electrical equipment for measurement, control, and laboratory use. “Safety requirements for electrical equipment for measurement, control, and laboratory use” This instrument uses a current-input terminal shutter for preventing wrong input. This instrument uses high-performance UL-standard fuses.

IM CA450-EN 1

2. Operating Environment

WARNING

■ Measurement Category

Measurement

3.2 Accuracy

Standard test conditions (1) Ambient temperature:

(2) Relative humidity:

(3) Orientation:

Horizontal or standing

(4) External magnetic elds:

Accuracy: ± (% of reading + digits)

* Each of the response times indicates the time it takes for the accuracy to

fall within the specied range.

DC Voltage Measurement

Range Resolution Accuracy Input Resistance

600 mV 0.1 mV 0.09% + 2 10 MΩ or more

6 V 0.001 V

60 V 0.01 V

1000 V 1 V 0.1% + 1

NMRR: 60 dB or more, 50/60 Hz ± 0.1% CMRR: 120 dB or more, 50/60 Hz (Rs = 1 kΩ)

Response time: Within 1 second

AC Voltage Measurement

AC coupling, rms value detection: sine wave

Range

600 mV 0.1 mV

For a range of 5 to 100%, the accuracy for the 1000 V range is 200 V to 1000 V CMRR: 60 dB or more, DC to 60 Hz (Rs = 1 kΩ)

For nonsinusoidal waveforms whose crest factor is less than 3,

add ±(2% of reading + 2% of range) to the accuracy.

For the 1000 V range, the peak voltage is 1500 V or less Response time: Within 2 seconds

Resolution

50/60 Hz

6 V 0.001 V

60 V 0.01 V

0.5% + 5 1% + 5

600 V 0.1 V

1000 V 1 V —

23°C ± 5°C

45% to 75% RH (no condensation)

errestrial magnetic eld only

Approx. 11 MΩ

0.09% + 1

Approx. 10 MΩ600 V 0.1 V

Accuracy

40 Hz to

500 Hz

500 Hz to

1 kHz

1.5% + 5

Impedance

10 MΩ or more, <200 pF

Approx. 11 MΩ, <50 pF

Approx. 10 MΩ, <50 pF

Maximum Input

1000 VDC

1000 Vrms AC

Input

Voltage

Maximum

Input

Voltage

1000 VDC

1000 V rms AC

7IM CA450-EN

DC Current Measurement

Range Resolution Accuracy Voltage Drop 30 mA 0.001 mA 0.05% + 2 < 0.3 V 100 mA *1 0.01 mA 0.05% + 2 < 0.8 V

*1 Only the 30 mA range can be used during LOOP POWER output. Response time: Within 1 second

Resistance Measurement ( Ω )

Maximum

Range

Resolution

Accuracy

Measuring

Current

600 Ω 0.1 Ω 0.2% + 2 <1.2 mA <3.5 V

6 kΩ 0.001 kΩ

60 kΩ 0.01 kΩ <13 µA

0.2% + 1 *1

<110 µA

600 kΩ 0.1 kΩ <1.3 µA

6 MΩ 0.001 MΩ 0.35% + 3

60 MΩ 0.01 MΩ 1% + 2 *2

*1 The accuracy after ZERO CAL

*2 For 40 MΩ to 60 MΩ, the accuracy is 2% + 2.

Response time:

Within 2 seconds for 600 Ω to 600 kΩ, within 10 seconds for 6 MΩ to 60 M

<130 nA

Open-Loop

Voltage

<1.3 V

Continuity Check

Range

Resolution

600 Ω 0.1 Ω

Operating Range

The buzzer sounds at

resistances lower than

50 ± 30 Ω.

Measuring

Current

<1.2 mA < 3.5 V 1000 Vrms

Open-Loop

Voltage

Input Protective

Voltage

1000 Vrms

Input Protective

Voltage

Diode Test

Range

2 V 0.001 V 1% + 2

Resolution

Accuracy

Measuring

Current

(Vf = 0.6 V)

Approx.

0.5 mA

Open-Loop

Voltage

Input Protective

Voltage

<3.5 V 1000 Vrms

IM CA450-EN8

Frequency Measurement ( Hz )

AC Coupling

Range Resolution Accuracy Input Voltage Range

10.00 Hz to 199.99 Hz 0.01 Hz

90.0 Hz to 1999.9 Hz 0.1 Hz

0.900 Hz to 19.999 kHz 0.001 kHz 0.4 to 600 Vrms

0.005% + 1

0.3 to 600 Vrms

Peak Hold (P•H)

Measurement Function Accuracy Minimum Detection Width

DCV ±100 digits >6 ms

DC Output

Range

20 mA 0.001 mA

Resolution

Accuracy Load Condition

SOURCE 0 to 20 mA Compliance voltage 28 V

0.05%

of range

SIMULATE (SINK) 0 to 20 mA External power supply 15 to 48 V overrange up to 25 mA

< 10 mH

24 V Loop Power Supply (LOOP POWER)

Range Load Condition

24 V 24 VDC (typ.), load current 20 mA

9IM CA450-EN

4. Operation

CAUTION

4.1 Precautions before Measurement

■ Operation and Strage Precautions

• When inserting the batteries into the instrument, refer to section 7.1, “Replacing the Batteries.”

• There is a blank cover on the upper part of the back casing.

Only remove it when connecting th

package (sold separately).

• Do not use the instrument near devices that produce high levels of noise or in areas subject to sudden changes in temperature.

Doing so may result in unstable rea

Cleaning

• Do not wipe the instrument using benzine, paint thinner, or any other solvent (chemical).

Doing so may lead to discoloration and other problems. Use a dry cloth to clean the instrument.

Strage

• Do not leave the instrument exposed to direct sunlight or in a hot and

humid location, such as the inside of a vehicle, for a signicant length of time.

• If you do not intend to use the instrument for a signicant period of time,

remove its batteries.

e USB adapter of the communication

dings and errors.

■ Turning the Power On and Off

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

Turn the function switch from the OFF position to the measurement range position. The power turns on. After measuring, turn the function switch off. (If test leads or lead cables are connected to the current measurement and output terminals, you cannot turn the function switch to the OFF position.)

IM CA450-EN10

4.2 Components

Display (LCD)

Model name

Front Panel

■ CA450

SHIFT key MIN/MAX key RANGE key HOLD key

LIGHT key SELECT key

RELΔ/% key

Hz key

Function switch

Input and output terminal area

11IM CA450-EN

Blank cover

Rear Panel

(Back)

Under (hidden below)

the stand

1000V 10A CAT II

Caps of Test leads

Measurement category O (Other) DC 70V 100 mA

Serial number

Nameplate

■ Test leads (98073)

With Caps: 1000V 10A CAT III/600V 10A CAT IV

Without Caps:

■ Lead cables (98064)

Stand

Black

Red

IM CA450-EN12

(1) Function switch

V / Hz

mV / mV

Ω /

mV / mV

Ω /

Use this switch to turn the power on and off and to select the measurement mode.

Function Mode Function Mode

OFF

Turns the CA450 off. Continuity check AC voltage measurement and frequency measurement

DC voltage measurement

DC/AC voltage measurement in mV and various SENSOR modes

Resistance measurement Diode test

OUT PUT

DC current measurement

DC current output Constant current output

DC current output Current sweep output

DC current measurement Loop power supply

If test leads or lead cables are connected to the current measurement

and output terminals, you cannot turn the function switch to the OFF position.

(2) SELECT key

By pressing this key, you can select different measurement modes when the function switch is at the positions listed below. You can switch out of the selected mode by pressing the key again.

position: AC voltage mV measurement

(AC SENSOR measurement in SENSOR mode)

position:

Diode test

position:

(3) RANGE key

Use this key to select the measurement range.

Fixed

AUTO

range: “Range Hold” appears on the display.

The range increases each time you press RANGE.

range:

“AUTO” appears on the display. To select AUTO range, hold down RANGE for 1 second or longer.

The SELECT key turns the internal series resistor for HART communication on and off.

Operation mode switching

13IM CA450-EN

(4) HOLD key

Use this key to hold the measured values. Press HOLD to switch between data hold, auto hold, peak hold, and no hold (release). (Hold modes that are not supported for the selected measurement function are skipped.)

Data hold:

Auto hold:

Peak hold

The currently displayed measured values are held. “D•H” appears on the display.

The measured values are automatically held according to the operation of the test leads. “A•H” appears on the display.

The peak values are held. “P•H” appears on the display.

(5) LIGHT key

Use this key to turn the backlight on and off. Press the key once to turn it on. Press it again to turn it off.

Use this key to control the sleep function. During measurement or output, Hold down LIGHT for 2 seconds or longer to put the CA450 in sleep mode. (While the CA450 is in sleep mode, hold down the LIGHT key for 2 seconds or longer to clear sleep mode.) (You cannot clear sleep mode immediately after the CA450 is put in sleep mode. Wait at least 2 seconds after the CA450 is put in sleep mode before you clear it.)

(6) key

Use this key to display the measured values as relative values (you can display the differences between values using numbers or percentages).

1: Difference display

2: Percentage difference

display

(REL%)

" " appears on the display.

" " and " % " appear on the display.

Use this key during the zero adjustment of the resistance measurement function. With the test leads shorted, press the REL key to execute zero adjustment.

IM CA450-EN14

(7) MIN/MAX key

Use this key to display the minimum (MIN), maximum (MAX), and average (AVG) values within the measurement period. When you press the key, recording starts, and “MIN,” “MAX,” and “AVG” appear on the display. (The AUTO OFF function is disabled.) When peak hold is enabled, press the REL key to reset the peak value.

(8) Hz key

When the function switch is turned to , use this key to switch between AC voltage measurement and frequency measurement.

Use this key in calibration mode to conrm the calibration value.

(9) SHIFT key

If you press SHIFT while a measurement mode is selected, “Shift” appears on the display.

In this state, you can congure various settings by pressing the various keys.

SHIFT +

LIGHT key

SELECT key

SETUP mode

Switches from mV mode to SENSOR mode

While an output mode is selected, press SHIFT to switch between SOURCE and SIMULATE.

15IM CA450-EN

■ Display (LCD) Description

Symbol or Unit Description

Appears during DC measurement or output

Appears during AC measurement

Appears when the polarity is negative (minus)

Appears during diode test mode

Appears during continuity check mode

Appears when relative values are being displayed

Indicates that the measurement range is set to xed

Indicates that the measurement range is set to auto

Indicates the present range

Appears when data hold is enabled

Appears when auto hold is enabled

Appears when peak hold is enabled

Appears when the MIN, MAX, and AVG values are being measured

Appears when the MAX value is being displayed

Appears when the MIN value is being displayed

Appears when the AVG value is being displayed

Appears when user calibration is being performed

Appears when the auto power-off function is enabled

Appears during rms value detection

Appears when SHIFT has been pressed

IM CA450-EN16

Symbol or Unit Description

Shows the main value Shows the input or output value A converted value is shown in SENSOR mode

Appears when the range has been exceeded

Appears when the battery voltage is low

Appears during current output

Appears in loop power supply mode

Appears in SPAN check mode

Appears when the SIMULATE operation is being performed

Appears in SENSOR mode

Indicates the main unit

Indicates the subunits Shows the MIN, MAX, and AVG recording time Shows the input voltage unit in SENSOR mode

Shows the subvalue Shows the MIN, MAX, and AVG recording time Shows the reference value during relative calculation

Shows the current sweep output or step output status Appears during slow linear output

Appears during fast linear output

Appears during slow step output

Appears during fast step output

Appears when the internal resistor for HART communication is on

17IM CA450-EN

4.3 Measuring Instructions

WARNING

Note

To avoid damaging the instrument and other equipment:

• Before you start measuring, make sure that the position of the function switch and position of the input terminals for connecting the test leads or lead cables are appropriate for the desired mode of measurement.

(Check that they are appropriate fo

• Before you turn the function switch, remove the test leads or lead cables from the circuit under measurement.

• Before you use this instrument or use its indications as a reference for further procedures, make sure that the instrument functions properly when used with a known power supply.

4.3.1 AC Voltage Measurement

1) Turn the function switch to the “ ” or “mV” position.

2) If you turned the function switch to “mV,” press SELECT. (“

3) Insert the test leads into the input terminals.

4) Connect the test leads to the circuit under measurement, and then read the value when it stabilizes.

” is displayed.)

4.3.2 DC Voltage Measurement

r the measurement category.)

Test leads

Black Red

1) Turn the function switch to the “ ” or “mV” position.

2) Insert the test leads into the input terminals.

3) Connect the test leads to the circuit under measurement, and then read the value when it stabilizes.

Test leads

Black Red

If the range setting is selected and the test leads are not connected to a circuit, the instrument will still display a value, but measurement will not be adversely affected.

IM CA450-EN18

4.3.3 Measuring Using Sensors (SENSOR)

DC SENSOR range

You can use this function to measure the output of a current sensor or other type of sensor that converts its measured values into voltages, to convert the voltages into the original measured values, and to display the converted values. Before you perform measurement, you need to congure unit, conversion, and other settings. See section 4.6.2 “SENSOR Mode Input, Display, and Unit Settings.”

urn the function switch to the “mV” position.

2) Press SHIFT+SELECT to switch to DC SENSOR mode.

To switch to AC SENSOR mode, press SELECT again. The input voltage appears in the s In the main display, the value converted using the settings congured in

section 4.6.2 “SENSOR Mode Input, Display, and Unit Settings.”

AC SENSOR range

3) Connect the sensor that you will use to the input terminals.

4) Read the value when it stabilizes.

To return to normal mV measurement, press SHIFT+SELECT again.

ubdisplay.

SENSOR

Example of measurement when connecting a current clamp sensor with an input-to-output ratio of 10 mV/A

Use the setup function (see section 4.6) to congure the following settings.

Instrument input voltage: 10.0 (mV) Converted value, decimal place: 01.00 Unit: A If you connect the sensor after conguring the above settings, the current clamp sensor’ s output voltage (in mV) appears in the subdisplay, and the current detected by the current clamp sensor appears in the main display. (You can read the values directly.)

19IM CA450-EN

4.3.4 Resistance Measurement (Ω)

CAUTION

Note

To avoid damaging the instrument:

Before measurement, turn off the circuit under measurement so that no voltage is applied.

1) Turn the function switch to the “Ω” position.

2) Insert the test leads into the input terminals.

3) Connect the test leads to the circuit under measurement, and then read the value when it stabilizes.

Test leads

Black Red

Zero adjustment for resistance

We recommend that you perform zero adjustment to obtain accurate measurements. After you perform steps 1) and 2) above, short the test leads, and press the REL key.

(When zero adjustment is performed, the instrument will show a reading of 0.0 Ω.)

The zero adjustment value is used until the power is turned off.

IM CA450-EN20

4.3.5 Continuity Check

CAUTION

To avoid damaging the instrument:

Before measurement, turn off the circuit under measurement so that no voltage is applied.

1) Turn the function switch to the“

2) Insert the test leads into the input terminals.

3) Connect the test leads to the circuit under measurement whose continuity you want to check.

the circuit is continuous

(less than approximately 50Ω), the buzzer sounds.

”position.

4.3.6 Diode Test

To avoid damaging the instrument:

Before measurement, turn off the circuit under measurement so that no voltage is applied.

1) Turn the function switch to the “Ω” position.

Press SELECT to switch to diode measurement.

(

is displayed.)

2) Insert the test leads into the input terminals.

3) Connect the test leads to the diode, and then read the value when it stabilizes.

Test leads

Black Red

Test leads

Black Red

21IM CA450-EN

Forward-Bias Diode Test

Test leads

Forward-bias test

Reverse-bias test

Test leads

Connect the black test lead to the cathode, and connect the red test lead to the anode. For a silicon diode, the reading should be approximately

0.5 V. For an LED, the reading should be approximately

1.5 V to 2.0 V.

Reverse-Bias Diode Test

Connect the black test lead to the anode, and connect the red test lead to the cathode. Normally, “OL” appears. If a voltage value appears, the diode is defective.

Black

Red

Figure 1

Red Black

Figure 2

IM CA450-EN22

4.3.7 DC Current Measurement

WARNING

Subdisplay (percentage of span)

Main display (30 mA range) Main display (100 mA range)

To avoid damaging the instrument and other equipment:

• Before you start measuring, make sure that the position of the function switch and position of the input terminals for connecting the test leads are appropriate for the desired mode of measurement.

The maximum input current for mA

measurement is 110 mA.

1) Turn the function switch to the “

2) Connect the black test lead to the COM input terminal, and connect the red test lead to the

3) Connect the test leads to the circuit under measurement, and then read the value when it stabilizes.

Press the RANGE key to select a range.

When the range is 4 to 20 mA

”position.

input terminal.

Test leads

Red Black

When the range is 10 to 50 mA

23IM CA450-EN

Subdisplay: Displaying and Conguring the Span

In addition to the DC current value in the main display, you can also display the span value as a percentage in the subdisplay.

Subdisplay for the 30 mA Range

Input Current Value

(Main display)

-33.000 mA -231.3% -165.0%

0.000 mA -25.0% 0.0%

4.000 mA 0.0% 20.0%

20.000 mA 100.0% 100.0%

30.000 mA 162.5% 200.0%

33.000 mA 181.3% 165.0%

The displayed value varies depending on the setting (4 to 20 mA or 0 to 20 mA) made in section 4.4.4, “Current Span Setting.”

Subdisplay for the 100 mA Range

Input Current Value

(Main display)

-110.00 mA -110.0% -300.0% -220.0%

0.00 mA 0.0% -25.0% 0.0%

10.00 mA 10.0% 0.0% 20.0%

50.00 mA 50.0% 100.0% 100.0%

100.00 mA 100.0% 225.0% 200.0%

110.00 mA 110.0% 250.0% 220.0%

The displayed value varies depending on the setting (0 to 100mA, 10 to 50mA, or 0 to 50mA) made in section 4.6.3, “Current Span Setting for the 100 mA Range for DCmA Measurement.”

Subdisplay for the 30 mA Range

4 to 20 mA 0 to 20 mA

Subdisplay for the 100 mA Range

0 to 100 mA 10 to 50 mA 0 to 50 mA

IM CA450-EN24

4.3.8 Loop Power Measurement

LOOP POWER

Two-wire system transmitter

Transmitter

You can use this function to measure the current that ows when a constant voltage of 24 VDC is applied. 24 V loop measurement can be used for transmitter loop testing. (You can connect the CA450 to the transmitter instead of connecting a transmitter or signal conditioner.)

(signal conditioner)

4 to 20 mA

Red Black

1) Turn the function switch to the “ ” position. (“LOOP POWER” appears on the display.)

A constant voltage of 24 VDC is output between the “SOURCE (+)” and

“SOURCE (−)” measurement terminals.

2) Connect the red test lead to “SOURCE (+)” and the black test lead to “SOURCE (−).”

3) Connect the test leads to the circuit under measurement, and then read the values when they stabilize.

Just as in mA measurement, the main display shows the measured value,

and the subdisplay shows the value of the measured value divided by

the current span times 100 (%).

(See section 4.3.7 “DC Current Measurement.”)

Distributor

25IM CA450-EN

4) Press SELECT to turn the internal 250 Ω series resistor for

Tip

HART communication on.

(“250ΩHART” appears on the display.)

Press SELECT again to turn the internal resistor off.

The loop power is supplied at the typical value of 24 VDC. Depending on different conditions, such as the loop current value or whether there is a internal series resistor, the voltage across the terminals may be greater than 24 V.

4.3.9 Frequency Measurement (Hz)

1) Turn the function switch to the “ “ position.

2) Press the Hz key to select frequency measurement. (The measured frequency value and unit appear in

the main display, and the measured voltage appears in the subdisplay.)

3) Insert the test leads into the input terminals.

4) Connect the test leads to the circuit under measurement, and then read the values when they stabilize.

Test leads

Black Red

Note that range hold and selection operations performed using the Range key only apply to the subdisplay (measured voltages).

IM CA450-EN26

4.3.10 Auto Hold Function

Note

The CA450 can automatically detect measured values and hold them according to the operation of the test leads.

1) During normal measurement, press the HOLD key twice to select “A•H.” (“A•H” appears

2) Connect the test leads to the circuit under measurement.

When the measured value stabiliz

4) Remove the test leads from the circuit under measurement.

5) The measured value display is held down. While “A•H” is displayed, you can

• You cannot use this function during DCmV or ACmV measurement (this includes SENSOR mode), frequency measurement, or during a continuity check.

• You cannot use this function at the same time as the relative value display function or when the MIN, MAX, and AVG values are being recorded.

• Unstable input signals (measured values) cannot be held.

on the display.)

es, the buzzer makes a beeping sound.

repeat steps 2) through 4) as often as you want.

4.3.11 Peak Hold Function

The CA450 always detects and updates the instantaneous peak value during DC voltage measurement (DCV). You can determine the peak value of a waveform.

1) Set the function switch to .

2) Connect the test leads to the circuit under measurement.

3) Press the HOLD key three times to select “P•H.”

(“P•H” appears on the display, and the voltage range is xed.)

4) The peak value display is held.

5) You can reset the held peak value by pressing the MIN/MAX key. You can hold a new peak value.

27IM CA450-EN

Note

• Even if the polarity of the input signal (DCV) is negative (minus), as long as the peak (change) direction is positive, the peak value can be measured.

• While the peak value is being measured, you can display relative values based on a measured reference value.

1) Press the key while the peak is held. (“ ” is displayed.) Main display value: The current peak value – the peak value when the REL key was pressed

2) Press the key again. (The unit changes to ‘%’.) Main display value: (The current peak value – the peak value when the REL key was pressed) /the peak value when the REL key

was pressed × 100 (%)

3) To no longer show relative values, press again.

The “ ” and “%” display disappear, and the CA450 returns to the

normal peak hold mode.

You can reset the peak value by pressing MIN/MAX.

• ou can hold a new peak value.

IM CA450-EN28

4.3.12 Relative Value Display

The CA450 can calculate and display relative values that represent the difference

or percentage from a reference value. (In this display, the range is xed.)

Difference Display

The CA450 shows the value of the measured value minus the reference value.

Measure (input) the reference val

2) Press to conrm the reference value. (“

” is displayed, and the range is held.)

Measure (input) the measured va

3) on the measurement function.

• For DCmA measurement (including loop power measurement): Main display value: Subdisplay value: (Measured value – reference value)/

current span setting × 100 (%

• For measurement types other than DCmA: Main display value: Subdisplay value:

Percentage Difference Display (REL%)

The CA450 computes the value of (Measured value – reference value)/ reference value and displays the result as a percentage.

Measure (input) the reference val

2) Press

(“ ” is displayed, and the range is held.)

3) Press again. (“%” appears.)

Measure (input) the measured va

The displayed v

to conrm the reference value.

alues vary depending on the measurement function.

ue.

lues. The displayed values vary depending

Measured value – reference value

)

Measured value – reference value Reference value

ue.

lues.

• For DCmA measurement (including loop power measurement): Main display value: (Measured value – reference value)/

current span setting × 100 (%)

Subdisplay value: Reference value

• For measurement types other than DCmA: Main display value: (Measured value – reference value)/

reference value × 100 (%)

Subdisplay value: Reference value

29IM CA450-EN

4.3.13 MIN/MAX/AVG Function

Note

You can use this function to display the minimum (MIN), maximum (MAX), and average (AVG) values within the current measurement period.

(In this display, the range is xed.)

The averaged value that is displayed is the total of the recorded data divided by the number of recorded values. When you press the MIN/MAX key, recording starts, and “MIN,” “MAX,” and “AVG” appear on the display. (The AUTO OFF function is disabled.)

Recording Time

The timer starts, and the time from the start of recording is displayed as well as the MIN/ MAX record update time. The recorded time display shows times in the range of 0 seconds to 99 minutes, 59 seconds in units of seconds. It shows times greater than 100 minutes in units of minutes. To stop recording, press the HOLD key. (“D•H” appears on the display.)

Checking the Recording Time

You can check the recorded data by pressing the MIN/MAX key to switch between the display of the current maximum (MAX), minimum (MIN), and average (AVG) values. To restart recording, press the HOLD key again. To disable the MIN/MAX/AVG function, hold down MIN/MAX for 1 second or longer. (“MAX,” “MIN,” and “AVG” disappear.)

• While recording is stopped, removing the test leads does not affect the recorded

data.

• When an out-of-range input value is recorded, the minimum or maximum value

is displayed as “OL,” and the average value data becomes inaccurate.

• When you are measuring a widely uctuating signal, set the range to contain

the maximum and minimum values so that these values are not displayed as “OL.”

IM CA450-EN30

4.4 Output Instructions

WARNING

CAUTION

The CA450 can output DC current.

There are two output modes.

SOURCE mode: Current is supplied from the CA450. SIMULA voltage source.

TE mode (SINK):

There are two conguration modes.

Constant current output: The specied current is output continuously.

Current sweep output:

decreased within the specied span.

Do not apply a voltage of 48 V or greater to the output terminals. Doing so may lead to electric shock. Also, keep the voltage between the circuit and the ground below 48 V. Always use the attached lead cables and lead cables. (Check that they are appropriate for the measurement category.)

In modes other than SIMULATE mode, do not apply voltages to the output terminals. Mistakenly applying voltage to the output terminals could damage the internal circuitry.

The CA450 sinks current from an external

The output current is increased and

If the mark appears while you are using the current output function, replace the batteries.

31IM CA450-EN

4.4.1 Constant Current Output (SOURCE mode)

1) Turn the function switch to the “ ” position.

After you turn the function switch, “OUTPUT” appears on the screen,

and the output is set to 0% of the current span setting.

(If you turn the function switch from the “

the “

” position, the output value setting and SOURCE/SIMULATE

” (current sweep) position to

setting are retained.)

ULATE” is displayed, press the SHIFT key.

If “SIM

(“SIMULATE” disappears, the CA450 switches to SOURCE mode,

and current output starts.)

3) Connect the lead cables to the positive (+) and negative (–) SOURCE terminals.

4) Use the output value setting keys to set the output value.

ct the lead cables to the circuit under test.

Conne

Lead cables Red Black

Output Value Setting Key

%STEP *

COARSE

FINE

Output Setting (Increase and decrease)

1-step (25%) increase

▲

1-step (25%) decrease

▼

0.1 mA increase

▲

0.1 mA decrease

▼

0.001 mA increase

▲

0.001 mA decrease

▼

* For details about using the %STEP key,

see “Output Values for Each Step” and “Span Check Mode.”

IM CA450-EN32

Tip

When the range is 4 to 20 mA

• Because the CA45 0 outputs current in SOURCE mode, it consumes more

current than in other modes.

You can keep the current consumption down in SIMULATE mode.

• Hold down the %STEP, COARSE, or FINE key to increase or decrease

each digit consecutively.

Output Values for Each Step

You can press

by one step (25%).

You can check the step value (as a percentage) in the subdisplay. (The output current appears in the main display.)

or to increase or decrease the output

Step

(Subdisplay)

-25% 0.000 mA --- 0% 4.000 mA 0.000 mA

25% 8.000 mA 5.000 mA 50% 12.000 mA 10.000 mA

75% 16.000 mA 15.000 mA 100% 20.000 mA 20.000 mA 125% --- 25.000 mA

131.2% 25.000 mA ---

For the method for setting the current span, see section 4.4.4, “Current Span Setting.”

Span Check Mode

You can switch the output current between 20 mA and 4 mA (or 20 mA and 0 mA)

using just the %STEP keys.

4 to 20 mA 0 to 20 mA

Output Value

33IM CA450-EN

When you hold down or for 1 second or longer, “SPAN” appears,

Tip

CAUTION

and the CA450 enters into span check mode. In this mode, the output switches to 100% when you press and to 0% when you press

Setting Key Output Setting

%STEP

The COARSE (0.1 mA increase and decrease) and FINE (0.001 mA increase and decrease) keys can also be used.

▲ 20.000 mA (100%)

▼

4 to 20 mA

4.000 mA (0%)

0 to 20 mA

0.000 mA (0%)

To exit span check mode, hold down or longer again. (“SPAN” disappears.)

If the set current is 0.1 mA or more and the terminals are open, “-----” appears in the main display, and “----” appears in the subdisplay.

or for 1 second

4.4.2 Constant Current Output (SIMULATE mode)

When the SIMULATE (SINK) function is enabled, the CA450 can sink the specied

amount of current from an external voltage source (such as a distributor) through the SIMULATE(+) terminal, and you can use the CA450 to simulate a two-wire system transmitter in a loop test. (You can connect the CA450 instead of a transmitter to test a transmitter or signal conditioner.)

• When sinking 20 mA from an external power source, keep the voltage within the range of 15 to 48 V.

• Set the polarity of the applied voltage as shown in the following gure, and be careful not to apply voltage in the opposite direction.

IM CA450-EN34

(SINK)

Ttansmitter

(signal conditioner)

Two-wire system

transmitter

4 to 20 mA

Distributor

Red Black

SIMULATE

1) Turn the function switch to the “ ” position. After you turn the function switch, “OUTPUT” appears on the screen,

and the output is set to 0% of the current span setting.

(If you turn the function switch from the “

the output value setting and SOURCE/SIMULATE setting are retained.)

2) Press the SHIFT key. “SIMULATE” appears. (Current sinking starts.)

3) Connect the lead cables to the positive (+) and negative (−) SIMULATE terminals.

(Connect the positive SIMULATE terminal to the positive terminal of the external

DCV power source. Make sure that the power source voltage is within 15 to 48 V.)

4) Just as in SOURCE mode, use the output setting keys to set the sink current value. (To enter span check mode, hold down

or longer.)

5) Connect the lead cables to the circuit under test.

” position to the “ ” position,

or for one second

Press the SHIFT key again. “SIMULATE” disappears, and the CA450 returns to constant current output (SOURCE) mode.

35IM CA450-EN

Tip

If the set current is 0.1 mA or more and the terminals are open, “-----” appears in the main display, and “----” appears in the subdisplay.

4.4.3 Current Sweep Output

You can make the output current (in SOURCE or SIMULATE mode) automatically

uctuate between 0% and 100% of the current span setting.

1) Turn the function switch to the “ After you turn the function switch, “OUTPUT” appears on the screen,

” position.

and the output starts rising from 0% of the current span setting.

(If you turn the function switch from the “

” position to the “ ” position, the output value setting and SOURCE/SIMULATE setting are retained.) Press the SHIFT

key to select the current output mode (SOURCE or SIMULATE).

3) Press the SELECT key to select an output mode. (When you change the output mode, the current starts rising from the value

currently being output according to the new mode.)

4) After you connect the lead cables to the appropriate terminals for the output mode (SOURCE or SIMULATE), connect them to the circuit under test.

If you want to stop a current sweep that is being output, turn the function switch to “

.” (The constant current output value is set to the value of the current being output when the switch is turned.)

Operation Mode Operation

Slow 0% to 100% to 0% in 40 seconds Fast 0% to 100% to 0% in 15 seconds Slow 0% to 100% to 0% in 25% steps

Each step is 15 to 60 seconds long. *

Fast 0% to 100% to 0% in 25% steps

Each step is 5 seconds long.

IM CA450-EN36

Linear Mode Current Output

(%)

Time (s)

Span

Fast: 5 sec

Time (s)

Span

Tip

Output current

100

Step Mode Current Output

SlowFast

4015

Output current

100

(%)

Slow: 15 to 60 sec *

* In slow step mode, you can select 15, 30, 45, or 60 seconds. See section 4.6.4, “Setting the Slow Step Time.”

37IM CA450-EN

4.4.4 Current Span Setting

You can select one of the following two current spans. The following two percentage displays vary depending on the selected range: the output current value and the measured current value for mA measurement mode in the 30 mA range.

Current Span

Setting

4 to 20 mA 4.000 mA 20.000 mA

0 to 20 mA 0.000 mA 20.000 mA ---

Output Current and Measured Current

(30 mA range)

When the display is 0% When the display is 100%

Notes

Factory

default

You can use the following method to set (change) the current span.

1) Turn the function switch to the “OFF” position, or put the CA450 into sleep mode.

While holding d

If the CA450 is in sleep mode, hold down the RANGE and LIGHT keys

for 2 seconds or longer.

After all the LCD elements appea

4) After setting the current span, turn the function switch to the "OFF" position, or put the CA450 into sleep mode.

If the current span was set to 4 to 20 mA, this operation changes it to 0 to 20 mA. If the current span was set to 0 to 20 mA, this operation sets it to 4 to 20 mA. The setting you make remains valid until you change it.

own the RANGE key, turn the function switch to any position.

r and then disappear, release the key.

4.5 Auto Power-Off (Sleep) Function

When the Auto Power-Off Function Is Enabled

“AUTO OFF” appears.

• The CA450 has an auto power-off function that automatically switches itself to

sleep mode 20 minutes after the last key operation.

The buzzer makes a beeping sound approximately 30 seconds before

the CA450 enters sleep mode. (This period is referred to as the warning period.)

• If you press a key or switch during the warning period, the time before

auto power-off is extended.

• You can clear sleep mode by turning the function switch to the OFF position,

waiting 1 second or longer, and then turning the switch to any position other than OFF. (You canalso hold down the LIGHT key for 2 seconds or longer to clear sleep mode.)

IM CA450-EN38

When the Auto Power-Off Function Is Disabled

Note

1) Turn the function switch to the “OFF” position, or put the CA450 into sleep mode.

2) While holding down HOLD, turn the function switch to any position.

If the CA450 is in sleep mode, ho

for 2 seconds or longer.

The auto power-off function is disabled, and “AUTO OFF” disappears.

Restoring the Auto Power-Off Function

When the function switch is set to OFF or when the CA450 enters sleep mode, the auto power-off function is restored. (When the power is turned on or when sleep mode is cleared, “AUTO OFF” appears.)

ld down the HOLD and LIGHT keys

4.6 Setup Function

You can use the setup function to:

1. Turn the buzzer on and off.

2. Congure SENSOR mode input, display, and unit settings.

3. Set the current range of the 100 mA range for DCmA measurement.

4. Set the slow step time.

5. Return the settings to their factory default values.

1) Press the SHIFT key. “Shift” appears on the display. While “Shift” is displayed, press th

After “SEtUP” appears, the screen for turning the buzzer on and off appears.

3) The setting to congure changes each time you press the LIGHT or SHIFT key.

4) To change a setting, use the ▲ (RANGE) and ▼ (REL) keys.

5) To save (conrm) a setting, press the HOLD key. (“SEt” appears,

the setting is saved, and the setting item is redisplayed.)

6) To return to normal measurement from setup mode, hold down the LIGHT key for 1 second or longer.

e LIGHT key to switch to setup mode.

• To cancel a setting, press the LIGHT key for 1 second or longer without pressing

the HOLD key, or use the function switch to turn the power off.

• You cannot enter setup mode from one of the current output modes

(constant current output or current sweep output mode).

39IM CA450-EN

4.6.1 Turning the Buzzer On and Off

:ON

You can turn the buzzer (beeping) sound on and off. Even if you turn the buzzer off, it will sound when it is performing important functions such asthose listed below.

• Continuity check buzzer

• Excess input alarm buzzer

• Auto power-off warning buzzer

1) Press the LIGHT or SHIFT key to display “bEEP.”

urn the buzzer on and off in the subdisplay. The initial setting is on.)

:OFF

HOLD

2) Use the ▲ (RANGE) and ▼ (REL) keys to select ON or OFF.

Press the HOLD key to save the setting. (After “SEt” appears, “bEEP” will appear again.)

4) To return to normal measurement from setup mode, hold down the LIGHT key for 1 second or longer.

IM CA450-EN40

4.6.2 SENSOR Mode Input, Display, and Unit Settings

Subdisplay 4

Main display 4

Subdisplay 1

Main unit

Main decimal place

10 mV

660 mV

Display

Input

For SENSOR mode (mV position on the function switch), you can set the input voltage and the corresponding main display and unit for that input voltage.

1) Press the LIGHT or SHIFT key to display the screen shown below.

The parameter that can be changed blinks.

Main display 1

Keep pressing the LIGHT key to switch between the following parameters. Subdis

2) Use the ▲ (RANGE) and ▼ (REL) keys to set the various values,

3) Press the HOLD key to save the settings.

(After “SEt” appears, the setting screen will appear again.)

4) To return to normal measurement from setup mode,

Subdisplay value: 000.0 to 999.9 Main display value: 0000 to 9999 Main display decimal place: XXXX, X.XXX, XX.XX, or XXX.X

Main display unit: A, mA, μA, °C, MΩ, kΩ, Ω, kHz, Hz, μF, nF, %, lx, no unit, V, or mV

For a current clamp sensor with an input-to-output ratio of 10 mV/A, set the subdisplay to 10.0 mV, and set the main display (value, decimal place, and unit) to 01.00 A.

With these settings, a maximum input of 660.0 mV will be displayed as 66.00 A.

play 4, subdisplay 3, subdisplay 2, subdisplay 1, main display 4, main display 3, (You can press the SHIFT key to switch parameters in the opposite direction.)

the decimal place, and the unit.

hold down the LIGHT key for 1 second or longer.

main display 2, main display 1, main decimal place, and main unit

6 A

1 A

41IM CA450-EN

4.6.3 Current Span Setting for the 100 mA Range for DCmA Measurement

When you select the 100 mA range in DCmA measurement mode ( ), you can change the current span (0 to 100 mA, 10 to 50 mA, or 0 to 50 mA).

Input Current Value

(Main display)

-110.00 mA -110.0% -300.0% -220.0%

0.00 mA 0.0% -25.0% 0.0%

10.00 mA 10.0% 0.0% 20.0%

50.00 mA 50.0% 100.0% 100.0%

100.00 mA 100.0% 225.0% 200.0%

110.00 mA 110.0% 250.0% 220.0%

Press the LIGHT

(The selected current span appears in the subdisplay. The default span is 0 to 100 mA.)

2) Use ▲ (RANGE) and ▼ (REL) to select 0 to 100 mA, 10 to 50 mA, or 0 to 50 mA.

Press the HOLD key to save the setting.

(After “SEt” appears, “SPAn” will appear again.)

4) To return to normal measurement from setup mode,

hold down the LIGHT key for 1 second or longer.

0 to 100 mA 10 to 50 mA 0 to 50 mA

or SHIFT key to display “SPAn.”

Subdisplay for the 100 mA Range

HOLD

IM CA450-EN42

4.6.4 Setting the Slow Step Time

If you select slow step mode for current sweep output, you can select the hold time (in seconds) of each step.

1) Press the LIGHT or SHIFT key to display “t.Int.”

HOLD

2) Use ▲ (RANGE) and ▼ (REL) to select 15s, 30s, 45s, or 60s.

Press the HOLD key to save the setting.

(After “SEt” appears, “t.lnt” will appear again.)

4) To return to normal measurement from setup mode,

hold down the LIGHT key for 1 second or longer.

4.6.5 Returning the Settings to Their Factory Default Values

You can reset all the items that you have changed (set) in setup mode to their factory default values.

1) Press the LIGHT or SHIFT key to display the screen for initialization,

which shows “dEF.”

HOLD

2) The settings return to their default values when you press the HOLD key.

(After “donE” appears, “dEF” will appear again.)

3) To return to normal measurement from setup mode,

hold down the LIGHT key for 1 second or longer.

Initial Settings (Default Values) for the Setting Items

Setting Item Initial Setting

Buzzer sound ON

SENSOR mode Subdisplay 10.0

Main display 01.00 Unit A

The current span of the 100 mA range for

DCmA measurement Slow step time setting 15 sec

0 to 100 mA

43IM CA450-EN

4.7 Additional Power-on Functions

Hold one of the keys below, and turn the function switch from OFF to any position to

congure various functions.

(If the CA450 is in sleep mode, hold down one of the keys below and

the LIGHT key for 2 seconds or longer to congure various functions.)

Key Congured Function Details

RANGE

SELECT

HOLD The auto power-off function is disabled.

Current output and measurement (30 mA range) span (0 to 20 mA, 4 to 20 mA)

All the LCD elements appear (only while the SELECT key is pressed).

Section

4.4.4 Section

4.7.1 Section

4.5

HOLD +

SELECT + RANGE Calibration function

The calibration data is returned to its factory default. ---

Chapter 5

4.7.1 Making All the LCD Elements Appear

If you hold down the SELECT key and turn the function switch from OFF to any position, all the LCD segments and marks are displayed. The LCD segments and marks are only displayed while the SELECT key is held. (If the CA450 is in sleep mode, hold down the SELECT and LIGHT keys for 2 seconds or longer to turn the entire LCD on.)

IM CA450-EN44

5. User Calibration Function

CAUTION

We recommend that you calibrate the instrument once a year to maintain its accuracy (high accuracy). You can use the user calibration function to perform calibration.

To avoid electrical shock:

• Make sure that specialized technicians calibrate the instrument using the proper equipment.

• To connect the CA450 to a signal generator (reference device), use the test leads and lead cables that come with the reference device.

• Be sure to read the reference device’s instruction manual before you calibrate the CA450.

• When you switch measurement modes during calibration, be sure to remove the test leads and lead cables rst, and then change the mode and terminal locations.

Calibration Conditions

Reference device: Use a reference device that fully satises

the accuracy of the CA450.

DC voltage and current generator or digital multimeter (DMM)

Environment: Temperature: 23 ± 5°C,

Humidity: 45 to 75% RH (no condensation)

Before you perform calibration, leave the CA450 in the environment described above for 30 minutes or more.

45IM CA450-EN

5.1 Calibrating Measurements

Calibration mode

Calibration point

Note

(CAL)

Subdisplay

Main display Masured value

Perform calibration according to Table 1.

1) While holding down the SELECT and RANGE keys, turn the function switch from the OFF position to the ACV position.

The CA450 will start in “calibration mode.” (The “CAL” segment will be visible.) If the CA450 is in sleep mode, hold down the SELECT, RANGE, and

LIGHT keys for 2 seconds or longer to start the CA450 in calibration mode.

2) Use the test leads to connect the CA450 to the reference device.

From the reference device, apply

The calibration point appears in the subdisplay.

4) Press the Hz key to conrm the value.

Press the calibration conrmation key after the reference device’s value stabilizes.

5) To calibrate other ranges, press the RANGE key to switch the range, check the function switch and the input terminals, refer to Table 1, and perform steps 3) and 4) again.

To perform peak hold and loop power calibration, see section 5.1.1,

“Peak Hold Calibration,” and section 5.1.2, “LOOP POWER calibration.”

6) To end calibration, turn the function switch off.

the values in Table 1.

You cannot calibrate the continuity check. Even in calibration mode, normal measurement is performed. (Keys other than RANGE and SELECT cannot be used.)

IM CA450-EN46

Table 1 Calibration Table (Measurements)

Function Range Calibration Point (Input value)

AC voltage measurement

6.000 V 6.000 V

60.00 V 60.00 V

600.0 V 600.0 V 1000 V 1000 V

DC voltage measurement

6.000 V 6.000 V

60.00 V 60.00 V

600.0 V 600.0 V 1000 V 1000 V

DC voltage measurement

600 mV 600.0 mV

[ 50.00/60.00 Hz ] [ 50.00/60.00 Hz ] [ 50.00/60.00 Hz ] [ 50.00/60.00 Hz *1 ]

AC voltage measurement

Diode test

Resistance measurement

600 mV 600.0 mV

2 V 2.000 V

600.0 Ω 600.0 Ω

6.000 kΩ 6.000 kΩ

60.00 kΩ 60.00 kΩ

600.0 kΩ 600.0 kΩ

6.000 MΩ 6.000 MΩ

60.00 MΩ 40.00 MΩ

DC voltage measurement

30.000 mADC 30.000 mA

100.00 mADC 100.00 mA

*1 If the power supply frequency is 50 Hz, calibrate using 60.00 Hz. If the power supply frequency is 60 Hz, calibrate using 50.00 Hz.

47IM CA450-EN

5.1.1 Peak Hold Calibration

1) In calibration mode (when the “CAL” segment is displayed), turn the function switch to the Press the HOLD key to enable pe

3) Use the test leads to connect the CA450 to the reference device. From the reference device, apply

The calibration You can clear the peak value by pressing the MIN/MAX key.

Press the Hz key to conrm the value.

From the reference device, apply the value under Full Scale in Table 2. The calibration Y

ou can clear the peak value by pressing the MIN/MAX key.

7) Press the Hz key to conrm the value.

o end calibration, turn the function switch off.

point appears in the subdisplay.

position.

ak hold mode.

the value under ZERO in Table 2.

Table 2

Calibratio

Function Range

DCV

peak hold

n Table (Peak Hold)

6.000 V 0 V 6.000 V

Calibration Point (Input value)

ZERO +Full Scale

Condition

---

5.1.2 Loop Power Calibration

1) In calibration mode (when the “CAL” segment is displayed),

turn the function switch to the LOOP POWER position.

2) Connect the CA450 to the reference device as shown in the diagram.

3) Set the reference device (the sink) to -30.000 mA. The calibration point appears in the subdisplay.

4) Adjust the reference device, which was set to -30.000 mA in the previous step,

so that the DMM display value (measured value) is 3.0000 V.

5) Press the Hz key to conrm the value.

6) To end calibration, turn the function switch off.

Table 3 Calibration Table (Loop Power)

Function Range Calibration Point

LOOP POWER 30.000 mA DC 30.000 mA 3.0000 V

DMM Display (Measured)

Value

IM CA450-EN48

Connection Diagram (Loop power)

LOOP POWER

Digital multimeter

Second decimal place Fourth decimal place

Up to the third decimal place

Calibration mode

(CAL)

Subdisplay Calibration point

Main display Measured value

5.2 Calibrating Output

Load

510 Ω/1 W

100 Ω

Red

Black

Subdisplay Fourth decimal place

Main display

(DMM)

H (V)

3.0000 V

-30.000 mA

DC voltage and current generator (Sink function)

Perform calibration according to Table 4.

1) While holding down the SELECT and RANGE keys, turn the function switch

from the OFF position to the

2) Connect the CA450 to the reference device as shown in the diagram.

3) Start +5% calibration:

In the main display and the subdisplay, 0.0000 mA appears. (The display in the subdisplay shows the value up to the fourth decimal place.)

position. (The “CAL” segment will be visible.)

49IM CA450-EN

4) Use , , COARSE▲, and COARSE▼ to adjust the value

Note

that appears in the main display and the subdisplay so that it is the same as the value read by the multimeter connected to the CA450.

You can use and to adjust the second decimal place

(values above the second decimal place are also affected), and you can use COARSE▲ and COARSE▼ to adjust the fourth decimal place (the third decimal place is also affected).

After you have nished adjusting

the value, press the Hz key to conrm it.

6) Start full scale calibration: In the main disp

lay and the subdisplay, 20.0000 mA appears.

(The display in the subdisplay shows the value up to the fourth decimal place.)

7) Use , , COARSE▲, and COARSE▼ to adjust the value

that appears in the main display and the subdisplay so that it is the same as the value read by the multimeter connected to the CA450.

You can use and to adjust the second decimal place,

and you can use COARSE▲ and COARSE▼ to adjust the fourth decimal place.

8) After you have nished adjusting the value, press the Hz key to conrm it.

The calibrated (The previous calibration data is o

o stop calibration, turn the function switch off.

range value is computed and saved in the internal memory.

verwritten.)

10) Perform steps 2) through 7) for the SOURCE and SIMULATE output modes.

You cannot calibrate current sweep output. Even in calibration mode, normal output is performed. (Keys other than SHIFT and SELECT cannot be used.)

Table 4 Calibration Table (Output)

Function

Constant current

output

Output

Direction

SOURCE 1.0000 mA 20.0000 mA ---

SIMULATE 1.0000 mA 20.0000 mA

* Adjust at 5% of the range.

Calibration Point

±5% * ±Full Scale

Condition

28 V external voltage

IM CA450-EN50

Connection Diagram (SOURCE, SIMULATE)

(SINK)

SOURCE

Digital multimeter

current generator

Red

Black

(DMM)

I (A)

Red

Black

(DMM)

I (A)

DC voltage and

SIMULATE

5.3 What to Check after Calibration

After you have nished calibrating the CA450, make sure (through inspection) that the calibration has been performed correctly and that the calibration values have been saved to the memory.

Inspection Method

After calibration has nished, turn off the CA450.

Then, turn on the CA450, and check the calibration in the normal output and measurement modes (not calibration mode). Use the reference device that you used for calibration to check the calibration. (Refer to the calibration points.)

51IM CA450-EN

6. Communication

Note

USB adapter

CA450

You can congure the CA450 and check its settings, measured values, and other information from a PC.

Through the use of a communication adapter, the CA450 can communicate with a PC through USB.

6.1 Cable Connection and Interface Specications

Cable Connection

Model 92015: Communication Package (sold separately)

Remove the blank cover on the back of the CA450, and connect a USB adapter.

(USB adapter

, USB cable and software)

USB cable

Stand

Conguring the RS232 Interface

Baudrate: 9600 bps Parity: None Stop bits: Data length: 8 bits Flow control: None Terminator: CrLf only

2 bits

IM CA450-EN52

6.2 Communication Commands

Item Data acquisition Measurement settings

Output settings

Command

Description

Outputs measured values

Normal

O O

Cal.

Queries the measurement function O X Sets or queries the measurement range O O Sets or queries the measured-value-display hold function

O O

Sets or queries SENSOR mode O X Switches or queries diode test mode O O Sets or queries whether the internal resistor for HART communication is on or off

O X

Sets or queries frequency measurement O X Sets or queries the RELΔ/% display O X Sets or queries the MIN/MAX/AVG function O X Switches or queries the MIN/MAX/AVG function

O X Sets or queries whether the measurement mode is DCmV or ACmV (DC sensor or AC

O O sensor in SENSOR mode) Sets or queries the auto range and range hold settings

O X

Queries the output function O X Sets or queries the output range (span) O O Sets or queries the output value O X Sets or queries whether the current output function is set to SOURCE or SIMULATE mode Increases the m

digit of the output value by 1 O X

Decreases the mth digit of the output value by 1

O X

O X Sets or queries SPAN check mode O X Increases the output value by one step or sets

the output value to 100%

Decreases the output value by one step or sets

the output value to 0%

O X

Sets or queries the current sweep output O O Sets or queries the slow step time O X

53IM CA450-EN

Item

Calibration

Other commands

Command

CMF

CSF

ESC C/

ESC S

Description Sets or queries whether the mode is normal mode or calibration mode Queries the calibration item X O Sets the calibration point X O Queries the measurement mode being calibrated Confirms the measurement calibration value X O Queries the output mode being calibrated X O Sets the output calibration value X O Confirms the output calibration value X O Saves the calibration value X O Outputs error data O O Outputs setup data O X Initializes setup data

Outputs the status byte O O Sets or queries whether a header is attached to the output data (OD) Sets or queries whether the bits in the status byte are detected or masked Sets or queries whether the backlight is on or off Resets the peak hold value O X Sets or queries whether the buzzer is on or off O X Sets or queries the span setting for the 100 mA range for DCmA measurement Sets or queries the input voltage value for SENSOR mode Sets or queries the converted value for SENSOR mode Sets or queries the decimal place for SENSOR mode Sets or queries the unit for SENSOR mode O X

Normal

O O

X O

O X

O O

O X

Cal.

IM CA450-EN54

6.3 Detailed Command Descriptions

Conguration and Control

Command: The format for sending the command. Answer: The format of replies to commands, such as configuration and

control commands, that are not queries for information. (Some commands do not receive any reply.)

When an error occurs, the same error message that appears on the LCD (“ERRm,” where m is the error number) is returned.

Queries

Command: The format for sending the command. Return: The format of replies to commands that are queries for information.

Mode Conditions

Normal: The command can be used during normal measurement and output. Cal.:

The other conditions for each command are listed in section 6.5, “Communication Command

The command can be used during user calibration (see chapter 5).

Validity Table.”

Sets or queries whether the current output function is set to SOURCE or SIMULATE mode

Command = ASm<CRLF> -> Answer = ASm<CRLF> Command = AS?<CRLF> -> Return = ASm<CRLF>

Parameters

m = 0: SOURCE (default) 1: SIMULATE (SINK)

This command returns ERR13 when the CA450 is in constant current output mode or current sweep output mode.

Sets or queries whether the backlight is on or off

Command = BLm<CRLF> -> Answer = BLm<CRLF> Command = BL?<CRLF> -> Return = BLm<CRLF>

Parameters

m = 0: Off (default) 1: On

Norma

O X

Norma

O X

l Cal.

55IM CA450-EN

Sets or queries whether the buzzer is on or off

Command = BZm<CRLF> -> Answer = BZm<CRLF> Command = BZ?<CRLF> -> Return = BZm<CRLF>

Parameters

m = 0: OFF 1: On (default)

Normal

O X

Cal.

Sets or queries whether the measurement mode is DCmV or ACmV

Command = CCm<CRLF> -> Answer = CCm<CRLF> Command = CC?<CRLF> -> Return = CCm<CRLF>

Parameters

m = 0: DCmV measurement (default) 1: ACmV measurement

In SENSOR mode

m = 0: DC sensor measurement (default) 1: AC sensor measurement

If the measurement mode is neither DCmV nor ACmV, ERR13 is returned.

Confirms the output calibration value

Command = CD<CRLF> -> Answer = CD<CRLF>

In output calibration mode, the current output settings are used as the output calibration values for the currently selected

function, range, and calibration point (+FS, +5%, -FS, or -5%).

If the CA450 is in a measurement mode, ERR13 is returned.

Queries the calibration item

Command = CL?<CRLF> -> Return = CLm<CRLF>

Parameters

m = 3: Output calibration 4: Measurement calibration

Norma

O O

Norma

X O

Normal

X O

l Cal.

Cal.

IM CA450-EN56

CMF

Queries the measurement mode being calibrated

Command = CMF?<CRLF> -> Return = CMFm<CRLF>

Parameters

m = 0: DCV

2: Ω

5: Hz 7: ACV 8: DCmV 9: ACmV 10: Diode test 11: Continuity check 12: DCmA 13: LOOP POWER

If the CA450 is in constant current output, current sweep output, or continuity check function, ERR13 is returned.

Normal

X O

Cal.

Sets the calibration point

Command = CPm<CRLF> -> Answer = CPm<CRLF>

Parameters

m = 0: 1:

2: –FS calibration

3: –5% calib

–FS calibration and –5% calibration are used to calibrate the

SIMULATE output mode.

If –FS calibration or –5% calibration is specified in

measurement mode, ERR13 is returned.

+FS calibration Peak hold

calibration

zero calibration or +5% output

ration

Normal

X O

Cal.

57IM CA450-EN

Sets the output calibration value

Command = CRm<CRLF> -> Answer = CRm<CRLF> Command = CR?<CRLF> -> Return = CRm<CRLF>

Parameters

m = 18.0000 to 22.0000 for ±FS calibration

m = 0.9600 to 1.0400 for ±5% calibration

Normal

X O

Cal.

CSF

Confirms the measurement calibration value

Command = CS<CRLF> -> Answer = CS<CRLF>

In measurement calibration mode, the current measured values are used as the measurement calibration values for the currently

selected function, range, and calibration point (+FS or +0).

If the CA450 is in an output mode, ERR13 is returned.

Queries the output mode being calibrated

Command = CSF?<CRLF> -> Return = CSFm<CRLF>

Parameters

m = 14: Constant current output 15: Current sweep output

If the CA450 is in a measurement mode, ERR13 is returned.

Saves the calibration value

Command = CW<CRLF> -> Answer = CW,OK<CRLF>

(normal completion)

Saves the data after a mode or range is calibrated. If you turn off the CA450 without executing this command, the calibrations made immediately before are discarded.

Normal

X O

Normal

X O

Norma

X O

Cal.

l Cal.

IM CA450-EN58

Switches or queries diode test mode

Command = DIm<CRLF> -> Answer = DIm<CRLF> Command = DI?<CRLF> -> Return = DIm<CRLF>

Parameters

m = 0: Resistance measurement (default) 1: Diode test

If the mode is neither Ω nor diode test, ERR13 is returned.

Norma

O O

l Cal.

Decreases the output value by one step or sets the output

value to 0%

Command = DQ<CRLF> -> Answer = DQ,OK<CRLF>

Decreases the output value by one step (25%). Sets the output value to 0% of the span in span check mode.

If the CA450 is in any mode other than constant current output mode, ERR13 is returned.

Decreases the m

digit of the output value by 1

Command = DWm<CRLF> -> Answer = DW,OK<CRLF>

Parameters

m = 1 to 5 (1 is the least significant digit while 5 is the most significant digit)

If the CA450 is in any function other than constant current output function, ERR13 is returned. If the CA450 is in span check mode, ERR13 is returned.

Normal

O X

Normal

O X

Cal.

59IM CA450-EN

ESC C/ RC

Initializes setup data

("ESC" = ASCII 0x1B) Command = ESC C<CRLF>

Command = RC<CRLF>

However, when this command is used to initialize the settings: The output current span setting (0 to 20 mA or 4 to 20 mA) is not initialized.

Normal

O X

Cal.

ESC S

Outputs the status byte

("ESC" = ASCII 0x1B) Command = ESC S<CRLF> -> Answer = m<CRLF>

Outputs the status byte (as a decimal number). See section 6.6, “Status Byte Format.”

Sets or queries whether a header is attached to the output data (OD)

Command = Hm<CRLF> -> Answer = Hm<CRLF> Command = H?<CRLF> -> Return = Hm<CRLF>

Parameters

m = 0: 1: Header is

The changed setting is valid until the power is turned off.

Resets the peak hold value

Command = HC<CRLF> -> Answer = HC,OK<CRLF>

When peak hold is not enabled, ERR13 is returned.

Header is

not attached. (default) attached.

Normal

O O

Norma

O O

Normal

O X

Cal.

l Cal.

Cal.

IM CA450-EN60

Sets or queries the measured-value-display hold function

Command = HDm<CRLF> -> Answer = HDm<CRLF> Command = HD?<CRLF> -> Return = HDm<CRLF>

Parameters

m = 0: Display update enabled (default) 1: Data hold 2: Auto hold 3: Peak hold

• If the CA450 is in an output mode, ERR13 is returned.

• During MIN/MAX measurement, if HD1 is sent, recording and the updating of the display of the elapsed time are stopped.

If HD0 is sent, recording and the updating of the display of

the elapsed time are resumed.

• If HD1 is sent while peak hold is enabled, ERR13 is returned.

• To clear peak hold, use the HC command.

* During calibration, only the HD3 command, which switches the mode so that peak hold calibration can

be performed, is valid.

Normal

O O

Cal.

61IM CA450-EN

Sets or queries whether the bits in the status byte are detected or masked

Command = IMm<CRLF> -> Answer = IMm<CRLF> Command = IM?<CRLF> -> Return = IMm<CRLF>

Sets whether each of the bits in the status byte is detected or masked. (Querying is performed using the ESC S command. See section 6.6.) If you specify IM0, all the bits are masked. If you specify IM63, all the data bits reflect the current status.

Parameter

m = 0 to 63 1: bit0 (measurement completion) is detected 2: bit1 (output adjustment completion) is detected 4: bit2 (syntax error) is detected 8: bit3 (overrange) is detected 16: bit4 (24 V loop output error) is detected 32: bit5 (output error) is detected (Bits 6 and 7 of the status byte are fixed bits.)

The default is m = 63 (no masking)

Norma

O O

l Cal.

Sets or queries whether the internal resistor for HART communication is on or off

Command = IOm<CRLF> -> Answer = IOm<CRLF> Command = IO?<CRLF> -> Return = IOm<CRLF>

Parameters

m = 0: 250 Ω resistor off (default) 1: 250 Ω resistor on

If the CA450 is in any mode other than loop power measurement mode, ERR13 is returned.

Normal

O X

IM CA450-EN62

Cal.

Switches or queries the MIN/MAX/AVG function

Command = MCm<CRLF> -> Answer = MCm<CRLF> Command = MC?<CRLF> -> Return = MCm<CRLF>

Parameters

m = 0: Measured value display (default) 1: MAX value display 2: MIN value display 3: AVG value display

If MIN/MAX/AVG recording is disabled, ERR13 is returned.

Normal

O X

Cal.

Queries the measurement function

Command = MF?<CRLF> -> Return = MFm<CRLF>

Parameters

m = 0: DCV

2: Ω

5: Hz

ACV

DCmV

ACmV

9: 10: Diode tes

1 12: 13: LOOP

Switches or queries frequency measurement

Command = MHm<CRLF> -> Answer = MHm<CRLF> Command = MH?<CRLF> -> Return = MHm<CRLF>

Parameters

m = 0: ACV measurement (default) 1: Frequency measurement

If the CA450 is in any mode other than ACV mode, ERR13 is returned.

Continuity

DCmA

check

POWER

Norma

O X

Norma

O X

l Cal.

63IM CA450-EN

Sets or queries the MIN/MAX/AVG function

Command = MIm<CRLF> -> Answer = MIm<CRLF> Command = MI?<CRLF> -> Return = MIm<CRLF>

Parameters

m = 0: MIN/MAX/AVG recording is disabled (default) 1: MIN/MAX/AVG recording starts

If the CA450 is in an output mode, ERR13 is returned.

Normal

O X

Cal.

Sets or queries the span setting for the 100 mA range for DCmA measurement

Command = MPm<CRLF> -> Answer = MPm<CRLF> Command = MP?<CRLF> -> Return = MPm<CRLF>

Parameters

m = 0: 0 to 100 mA (default) 1: 10 to 50 mA 2: 0 to 50 mA

If the CA450 is in an output mode, ERR13 is returned. The changed setting is valid until it is changed again.

Normal

O X

Cal.

IM CA450-EN64

Sets or queries the measurement range

Command = MRm<CRLF> -> Answer = MRm<CRLF> Command = MR?<CRLF> -> Return = MRm<CRLF>

Parameters

[DCV] m = 1: 6 V 3: 60 V 4: 600 V 5: 1000 V [DCA] m = 0: 30 mA 1: 100 mA [ACV] m = 0: 6 V 1: 60 V 2: 600 V 3: 1000 V

[Ω] m = 0: 600 Ω 1: 6 kΩ 2: 60 kΩ 3: 600 kΩ

[DCmV] m = [ACmV] m = [Diode test] m =

[Continuity check] m = 0: 600 Ω

[LOOP

POWER] m = 0:

4: 6 MΩ 5: 60 MΩ

0: 600 mV 0: 600 mV 0: 2 V

30 mA

Norma

O O

l Cal.

65IM CA450-EN

Outputs measured values

Command = OD<CRLF> -> Return = abbcsddddddeee<CRLF>

Parameters

Header (4 bytes)*

a = V: voltage, A: current, O: resistance, T: temperature,

F: frequency, S: SENSOR mode

bb = DC: direct current, AC: alternating current,

R3: resistance measurement c = N: normal, O: overrange, E: no data, B: burnout * The header will not appear if you specify 0 (no header) in

the H command.

Data Area (10 bytes) s (sign) = _: plus or –: minus (_ represents a space)

dddddd = measured value (6 digits)

eee = E+0, E+3, E–3, E+6, E–6

(For overrange, no data, and burnout, ddddddeee =

_99999.E+6)

Normal

Cal.

O O

Outputs error data

Command = OE<CRLF> -> Return = ERRm<CRLF>

Outputs the most recent output error. After a value is returned, the saved error number is overwritten

with ‘ERR00<CRLF>’. Even if there is no error, ‘ERR00<CRLF>’ is returned.

Parameters

m = Error code

See section 6.4, “List of Errors.”

Normal

O O

IM CA450-EN66

Cal.

Outputs setup data

Command = OS<CRLF> -> Return = Measure a<CRLF> Function b<CRLF> Range c<CRLF> Source d<CRLF> Function e<CRLF> Range f<CRLF> Data g<CRLF> 24V Output h<CRLF> Light i<CRLF> Charge j<CRLF>

Parameters

a (measurement) = ON or OFF b (measurement function) =

c (measurement range) = 1000V, 600V, 60V, 6V for

600 mV for DCmV 600 mV for ACmV 60 MOHM, 6MOHM, 600kOHM,

60kOHM, 6kOHM, 600OHM for OHM 2 V for diode test 600OHM for continuity check 100 mA or 30 mA for DCmA 30 mA for loop power

d (output) = ON or OFF e (output function) = DCmA f (output range) = 20 mA for DCmA g (output value) h (output for 24 V loop measurement) = ON or OFF i (backlight) = ON or OFF j (charging) = OFF (always OFF)

DCV, OHM, FREQ, ACV, DCmV, ACmV,

DIODE, CONTINUITY,

DCmA, LOOP POWER

DCV/FREQ

Norma

O X

l Cal.

67IM CA450-EN

Sets or queries the current sweep output

Command = RAm<CRLF> -> Answer = RAm<CRLF> Command = RA?<CRLF> -> Return = RAm<CRLF>

Parameters

m = 0: Slow Linear (default) 1: Fast Linear 2: Slow Step 3: Fast Step

When the CA450 is in a measurement mode or constant current output mode, ERR13 is returned.

Norma

O O

l Cal.

Sets or queries the auto range and range hold settings

Command = RGm<CRLF> -> Answer = RGm<CRLF> Command = RG?<CRLF> -> Return = RGm<CRLF>

Parameters

m = 0: Auto range (default) 1: Range ho

When the CA450 is in an output mode or DCmV, ACmV, diode test, or continuity check mode, ERR13 is returned.

Sets or queries the RELΔ/% display

Command = RPm<CRLF> -> Answer = RPm<CRLF> Command = RP?<CRLF> -> Return = RPm<CRLF>

Parameters

m = 0: Normal measurement (default)

1: RELΔ display 2: REL% display

If the CA450 is in an output mode, ERR13 is returned.

Norma

O X

Norma

O X

l Cal.

IM CA450-EN68

Sets or queries the output value

Command = SDm<CRLF> -> Answer = SDm<CRLF> Command = SD?<CRLF> -> Return = SDm<CRLF>

Parameters

m (output value) = 0.000 to 25.000

If the CA450 is in a measurement mode, ERR13 is returned.

Normal

O X

Cal.

Queries the output function

Command = SF?<CRLF> -> Return = SFm<CRLF>

Parameters

m = 14: Constant current output 15: Current sweep output

If the CA450 is in a measurement mode, ERR13 is returned.

Sets or queries the input voltage value for SENSOR mode

Command = SIm<CRLF> -> Answer = SIm<CRLF> Command = SI?<CRLF> -> Return = SIm<CRLF>

Parameters

m (input voltage value) = 0000 to 9999 (4 digits)

If the CA450 is in an output mode, ERR13 is returned. Because the decimal place of the input voltage value is fixed, only the number is entered.

Sets or queries the decimal place for SENSOR mode

Command = SLm<CRLF> -> Answer = SLm<CRLF> Command = SL?<CRLF> -> Return = SLm<CRLF>

Parameters

m (decimal place) = 0: X.XXX, 1: XX.XX, 2: XXX.X, 3: XXXX

Norma

O X

Norma

O X

Norma

O X

l Cal.

If the CA450 is in an output mode, ERR13 is returned.

69IM CA450-EN

Sets or queries SENSOR mode

Command = SMm<CRLF> -> Answer = SMm<CRLF> Command = SM?<CRLF> -> Return = SMm<CRLF>

Parameters

m = 0: SENSOR mode is disabled (default) 1: SENSOR mode is enabled

If the CA450 is in a mode other than DCmV or DCmA mode, ERR13 is returned.

Norma

O X

l Cal.

Sets or queries SPAN check mode

Command = SPm<CRLF> -> Answer = SPm<CRLF> Command = SP?<CRLF> -> Return = SPm<CRLF>

Parameters

m = 0: SPAN check mode is disabled (default) 1: SPAN check mode is enabled

When you switch to span check mode, the previously output values are retained. Change the output values using commands such as the UQ and DQ commands. If the CA450 is in any mode other than constant current output mode, ERR13 is returned.

Sets or queries the output range (span)

Command = SRm<CRLF> -> Answer = SRm<CRLF> Command = SR?<CRLF> -> Return = SRm<CRLF>

Parameters

m = 0: 4 to 20 mA span (factory default setting) 1: 0 to 20 mA span

The changed setting is valid until it is changed again.

Norma

O X

Normal

O O

l Cal.

Cal.

IM CA450-EN70

Sets or queries the slow step time

Command = SSm<CRLF> -> Answer = SSm<CRLF> Command = SS?<CRLF> -> Return = SSm<CRLF>

Parameters

m = 0: 15 seconds (default) 1: 30 seconds 2: 45 seconds 3: 60 seconds

If you select slow step mode for current sweep output, this command sets or queries the hold time of each step. If the CA450 is in an output mode, ERR13 is returned.

Normal

O X

Cal.

Sets or queries the converted value for SENSOR mode

Command = STm<CRLF> -> Answer = STm<CRLF> Command = ST?<CRLF> -> Return = STm<CRLF>

Parameters

m (converted value) = 0000 to 9999 (4 digits)

If the CA450 is in an output mode, ERR13 is returned.

Sets or queries the unit for SENSOR mode

Command = SUm<CRLF> -> Answer = SUm<CRLF> Command = SU?<CRLF> -> Return = SUm<CRLF>

Parameters

m (unit) = 0: A, 1: mA, 2: uA, 3: °C, 5: MΩ, 6: kΩ, 7: Ω, 8: kHz, 9: Hz, 10: uF, 11: nF, 12: %

13: lx, 14: none, 15: V, 16: mV

If the CA450 is in an output mode, ERR13 is returned.

Norma

O X

Norma

O X

l Cal.

71IM CA450-EN

Sets or queries whether the mode is normal mode or calibration mode

Command = SYm<CRLF> -> Answer = SYm<CRLF> Command = SY?<CRLF> -> Return = SYm<CRLF>

Parameters

m = 0: Normal mode (default) 1: Calibration mode

Norma

O O

l Cal.

Increases the m

digit of the output value by 1

Command = UPm<CRLF> -> Answer = UP,OK<CRLF>

Parameters

m = 1 to 5 (1 is the least significant digit while 5 is the most significant digit)

If the CA450 is in any mode other than constant current output mode, ERR13 is returned. If the CA450 is in span check mode, ERR13 is returned.

Increases the output value by one step or sets the output value

to 100%

Command = UQ<CRLF> -> Answer = UQ,OK<CRLF>

Increases the output value by one step (25%). Sets the output value to 100% of the span in span check mode.

If the CA450 is in any mode other than constant current output mode, ERR13 is returned.

Norma

O X

Norma

O X

l Cal.

IM CA450-EN72

6.4 List of Errors

When ERR13 appears in the main display

Number Description ERR00 No errors ERR11 An undened command has been received. ERR12 The parameter specication for the command is incorrect. ERR13 A command has been received that cannot be executed

because of the status of the CA450. ERR16 An error was detected during calibration. ERR20 Error in the power supply for LOOP POWER measurement ERR23 The output current or voltage has exceeded its limit. ERR60 The saved setting data in the internal ash memory is not correct. ERR61 The saved measurement calibration value data in

the internal ash memory is not correct.

ERR62 The saved output calibration value data in

the internal ash memory is not correct.

If error number 11, 12, or 13 occurs during communication, the error number appears in the LCD main display.

73IM CA450-EN

6.5 Communication Command Validity Table

Measurement Output

Command

CMF

CSF

ESC C/ RS

ESC S

Normal RELΔ/%

X X X X X O X O O O O O X O O X O X O O O X X O X O X O O X O X X X X X X X X X X X O X X X X X O X X O X X X X X O X X X X X X X X O X X O X X X X X O X X X X X X X X X X X O X X X X X X X X O X X X X X O X X O X X X X X X X O X X X O O X O X X X X X X X X X X O X X X

O O O X X O X O X

O O O O O O O O O O O O O O O O O O O O X X X X X X X O O O O X X X X X O O O O O O O O O O X X O X X X X X X X O X X X X X X O O O X X X X X X O O X X X X X X X O X O X X X X X X O O O X X X X X X O X X O X X X X X

MIN/ MAX

Cal. SETUP

Constant

Current Output

Normal Cal. Normal Cal.

Current Sweep

Output

IM CA450-EN74

Measurement Output

Command

OD OE OS RA RG RP SD SF SI SL SM SP SR SS ST SU SY UP UQ

There are communication commands that may not be executable depending on the selected mode and the status of the CA450.

Normal RELΔ/%

O O O O O X X X X O O O O O O O O O O O O X O O X O X X X X X X X X O O O X X X X X X X X O O X X X X X X X X X X X X O X X X X X X X X O X O X O O O X X X X X X O O O X X X X X X O X X X X X X X X X X X X X O X X X O O O O X O O O O O O O X X X X X X O O O X X X X X X O O O X X X X X X O X X O X O O O O X X X X X O X X X X X X X X O X X X

MIN/ MAX

Cal. SETUP

Constant Current Output Normal

Cal.

Current Sweep

Output

Normal

Cal.

75IM CA450-EN

6.6 Status Byte Format

Status byte format (see the explanation of the ESC S command)

bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0

LOOP

error

POWER

supply

error

Overrange

(xed)1(xed)

bit 7 Fixed at 0 bit6 Fixed at 1 bit5 Becomes 1 if an error occurs during output.

bit4 Becomes 1 if an error occurs in the power supply for

bit3 Becomes 1 if a measured value is outside of its limits (overrange).

bit2 Becomes 1 when a forbidden operation or command is processed,

bit1 Becomes 1 when output is on after the output value has changed

bit0 Becomes 1 when measured data is conrmed during measurement.

Output

The data is held until the status byte is read.

LOOP POWER measurement. The data is held until the status byte is read.

Becomes 1 if the CA450 switches to a higher range when auto range is enabled. The data is held until the status byte is read.

when the CA450 cannot parse a command, or when a parameter is outside of its range. The data is held until the status byte is read.

and the output has stabilized. The data is held until the status byte is read.

The data is held until the status byte is read.

Syntax

error

Output adjustment completion

Measurement

end

IM CA450-EN76

7. Replacing the Batteries and Fuses

WARNING

CAUTION

With the case open

Screw position

7.1 Replacing the Batteries

When the battery voltage falls below the operating voltage, appears on the display. Follow the procedure below to replace the batteries.

• To avoid electrical shock, be sure to disconnect the CA450 from the circuit under measurement. (Remove the test leads and lead cables as well.)

• Turn the CA450 off.

• Do not measure while the case is open. Doing so may lead to electric shock.

• Do not mix different types of batteries or mix old batteries with new batteries.

• Insert the batteries with their polarities in the directions indicated by the holder.

Replacement Procedure

1) Remove the fastening screw on the back of the CA450’s case.

2) Open the case.

3) Replace each of the four batteries with a new battery.

4) Return the case to its original position, and tighten the fastening screw.

Blank cover (USB adapter attachment position)

Battery slots

Back of the case

77IM CA450-EN

7.2 Replacing the Fuses

WARNING

(440 mA/1000 V)

Back of the case With the case open

During current range measurement, the fuses may melt (blow out) because of excessive current. If this happens, replace the fuses.

• To avoid electrical shock, be sure to disconnect the CA450 from the circuit under measurement. (Remove the test leads and lead cables as well.)

• Turn the CA450 off.

• Do not measure while the case is open. Doing so may lead to electric shock.

• To avoid damaging the CA450, be sure to use the specied fuses.

Fuse specications (rating, maker, and model number):

F1 and F2 (440 mA/1000 V, Littlefuse, FLU .440)

Replacement Procedure

Remove the fastening screw on th

2) Open the case.

3) Remove the fuses from their holders.

Insert the new fuses into the hold

Return the case to its original position, and tighten the fastening screw.

Model number: 99042

e back of the CA450’s case.

ers. (Check the ratings of the fuses.)

F1:

F2:

Screw position

IM CA450-EN78

8. Calibration and After-Sales Service

Please direct questions about this product to the contact your nearest YOKOGAWA dealer.

Calibration

We recommend that you calibrate the instrument once a year to maintain its accuracy (high accuracy). Recommended calibration period: 1 year

(Refer to the information about the user calibration function.) For a service of calibration, contact your nearest YOKOGAWA dealer.

79IM CA450-EN

Serial Number

Serial number details

Sequential number

Serial number can be found on back-side of this product.

No. HK Q Xnnn

Q: Model CA450

Production Year

S: 2016 Y: 2022 T: 2017 Z: 2023 U: 2018 1: 2024 V: 2019 2: 2025 W: 2020 3: 2026 X: 2021 4: 2027

Rear (Back)

Blank cover

Production Month

1: Jan. 7: Jul. 2: Feb. 8: Aug. 3: Mar. 9: Sep. 4: Apr. A: Oct. 5: May. B: Nov. 6: Jun. C: Dec.

Serial number

IM CA450-EN80

9. Troubleshooting

What to Check When There Is a Problem

If the CA450 does not work properly even after you check the items below or you have a problem that is not listed below, contact your nearest YOKOGAWA dealer.

Symptom Items to Check

Even when the power is on, nothing appears on the LCD.

Current output is not working. • Have the fuses melted (blow out)?

The output or measured values are strange.

Control through the USB interface is not working.

“Err60” appears when the power is turned on.

“Err61” or “Err62” appears when the power is turned on.

• Are the batteries inserted properly?

• Have the batteries worn out?

SOURCE mode:

• When the current is output, is the load resistance too high?

(Open output terminals or leads)

SIMULATE mode:

• Is the input voltage too low?

(Check the external DCV power supply.)

• Is it possible that the values are being affected by noise?

• Are the communication settings correct?

• The settings that were specied with the setup function are incorrect.

Refer to section 4.6, “Setup Function,”

to return the CA450 to its factory default settings.

• The calibration data is incorrect. Refer to section 4.7, “Additional Power-on Functions,” to return the calibration data to its factory defaults. If after you perform the above operations, errors still appear every time you turn on the power, repairs are necessary.

81IM CA450-EN

10. Sales in Each Country or Region

10.1 Disposing the Product

Waste Electrical and Electronic Equipment (WEEE), Directive

(This directive is valid only in the EU.)

This product complies with the WEEE directive marking requirement. This marking indicates that you must not discard this electrical/ electronic product in domestic household waste.

Product Category

With reference to the equipment types in the WEEE directive, this product is classied as a “Monitoring and control instruments” product. When disposing products in the EU, contact your local

Yokogawa Europe B.V. ofce.

Do not dispose in domestic household waste.

10.2 How to Replace and Dispose the Batteries

EU Battery Directive

(This directive is valid only in the EU.) Batteries are included in this product. When you remove batteries from this product and dispose them, discard them in accordance with domestic law concerning disposal. Take a right action on waste batteries, because the collection system in the EU on waste batteries are regulated.

Battery type: Alkaline dry cell

Notice:

This marking indicates they shall be sorted out and collected as ordained in the EU battery directive.

How to remove batteries safely:

For further details, see section 7.1 “Replacing the Batteries.”

10.3 Authorized Representative in the EEA

Yokogawa Europe B.V. is the authorized representative of Yokogawa Test & Measurement Corporation for this product in the EEA. (EEA: European Economic Area) To contact Yokogawa Europe B.V., see the separate list of worldwide contacts, PIM 113-01Z2.

IM CA450-EN82

10.4 For the Pollution Control of Electronic and Electrical Products of the People's Republic of China

They are applicable only in China.

产品中有害物质的名称及含量

有害物质

部件名称

框架（塑料） × ○ ○ ○ ○ ○

线路板 ASSY × ○ ○ ○ ○ ○

导线

98073 98064

电池 × ○ ○ ○ ○ ○

＜选购＞

导线

98073 98064

○：×：表示该有害物质在该部件所有均质材料中的含量均在 GB/T 26572

规定的限量要求以下。表示该有害物质至少在该部件的某一均质材料中的含量超出 GB/T 26572 规定的限量要求。

环保使用期限 :

铅

（Pb）汞（Hg）镉（Cd）

× ○ ○ ○ ○ ○

该标识适用于 SJ/T 11364 中所述，在中华人民共和国销售的电子电气产品的环保使用期限。只要您遵守该产品相关的安全及使用注意事项，在自制造日起算的年限内，则不会因产品中有害物质泄漏或突发变异，而造成对环境的污染或对人体及财产产生恶劣影响。

六价铬

（Cr(VI)）

多溴联苯

（PBB）

多溴二苯醚

（PBDE）

注）该年数为“环保使用期限”，并非产品的质量保证期。零件更换的推荐周期，请参照使用说明书。

83IM CA450-EN

Appendix (External Dimensions)

192

IM CA450-EN84

Yokogawa Yokogawa CA450 Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

Checking the Contents of the Package

Regarding Safe Use of This Product

Concernant l’usage en toute sécurité de ce produit

Contents

1. Overview

2. Operating Environment

3.2 Accuracy

4. Operation

4.1 Precautions before Measurement

4.2 Components

4.3 Measuring Instructions

4.3.1 AC Voltage Measurement

4.3.2 DC Voltage Measurement

4.3.3 Measuring Using Sensors (SENSOR)

4.3.4 Resistance Measurement (Ω)

4.3.5 Continuity Check

4.3.6 Diode Test

4.3.7 DC Current Measurement

4.3.8 Loop Power Measurement

4.3.9 Frequency Measurement (Hz)

4.3.10 Auto Hold Function

4.3.11 Peak Hold Function

4.3.12 Relative Value Display

4.3.13 MIN/MAX/AVG Function

4.4 Output Instructions

4.4.1 Constant Current Output (SOURCE mode)

4.4.2 Constant Current Output (SIMULATE mode)

4.4.3 Current Sweep Output

4.4.4 Current Span Setting

4.5 Auto Power-Off (Sleep) Function

4.6 Setup Function

4.6.1 Turning the Buzzer On and Off

4.6.2 SENSOR Mode Input, Display, and Unit Settings

4.6.3 Current Span Setting for the 100 mA Range for DCmA Measurement

4.6.4 Setting the Slow Step Time

4.6.5 Returning the Settings to Their Factory Default Values

4.7 Additional Power-on Functions

4.7.1 Making All the LCD Elements Appear

5. User Calibration Function

5.1 Calibrating Measurements

5.1.1 Peak Hold Calibration

5.1.2 Loop Power Calibration

5.2 Calibrating Output

5.3 What to Check after Calibration

6. Communication

6.2 Communication Commands

6.3 Detailed Command Descriptions

6.4 List of Errors

6.5 Communication Command Validity Table

6.6 Status Byte Format

7. Replacing the Batteries and Fuses

7.1 Replacing the Batteries

7.2 Replacing the Fuses

8. Calibration and After-Sales Service

9. Troubleshooting

10. Sales in Each Country or Region

10.1 Disposing the Product

10.2 How to Replace and Dispose the Batteries

10.3 Authorized Representative in the EEA

10.4 For the Pollution Control of Electronic and Electrical Products of the People's Republic of China

Appendix (External Dimensions)