RS PRO 123-8769 User manual

Instruction Manual

123-8769

VOLTAGE/CU ENT CALIB ATO

TABLE OF CONTENTS

1. FEATURES............................................................... 1

2. SPECIFICATIONS.................................................... 1

2-1 General Specifications........................................

2-2 Electrical Specifications.......................................2

3. FRONT PANEL DESCRIPTION....................................4

3-1 Display.....................................................................4

3-2 Function Switch........................................................ 4

3-3 Power Switch............................................................4

3-4 Ran

e Switch...........................................................

3-5 Calibration Ad

ust knob.............................................

3-6 Battery Compartment/Cover...................................... 4

3-7 Input Socket...................................................... 4

3-8 Cable Plug.........................................................

3-9 Alligator Clips.....................................................4

4. MEASURING PROCEDURE.........................................5

4-1 Current source .................................................. 5

4-2 Current measurement.........................................5

4-3 Power and current measurement of two wire

loop................................................................. 6

4-4 DC mV source.................................................... 7

5. REPLACEMENT OF BATTERY.....................................8

1. FEATURES

* Portable instrument for calibrating process devices and

measuring process signals.

* Adjustable 0-24 mA current source.

* Adjustable -199.9 mV to +199.9 mV DCV source.

* Current calibrator drives loads up to 500 ohms.

* The instruments can power as well as measure a two-wire

current loop, useful for testin

4-20mA loop devices ( for

example pressure transmitters).

* Four functions include: 1) Precision current source

2) Measurement of current signal 3) Simultaneous powering

and measurement of a 2-wire current loop 4)Precision DC

mV source,

2. SPECIFICATIONS

2-1 General Specifications

Display LCD display, max. display count 1999.

13 mm ( 0.5" ) di

it hei

ht.

Function

1) Current source :

Ran

e & 2 ran

es :

Resolution 0 - 19.99 mA x 0.01 m

0 - 24 mA x 0.1 m

2) Current measurement :

2 ran

es :

0 - 19.99 mA x 0.01 m

0 - 24 mA x 0.1 m

3) Power and current measurement of

two wire loop :

0 - 19.99 mA x 0.01 m

0 - 24 mA x 0.1 m

4) DC mV source :

- 199.9 mV to + 199.9 mV x 0.1 mV

Samplin

Approx. 0.4 second.

Time

Over input Indication of " 1 ".

Indication

Operatin

0 to 50 ( 32 to 122 ).℃℃℉ ℉

Temperature

Operatin

Less than 80% RH.

Humidity

Power Supply 006P DC 9V, MN1604/PP3 battery or

equivalent.

Alkaline type or heavy duty type.

Power

Current measurement :

Consumption Approx. DC 12 m

Power and current measurement :

Approx. DC 12 m

Current source (under 10 mA si

nal out put) :

Approx. DC 33 m

DC mV source (under 100 mV si

nal out put) :

Approx. DC 33 m

Dimension 185 x 78 x 38 mm ( 7.3 x 3.0 x 1.5 inch ).

Wei

ht 265

/0.58 LB ( incluin

battery ).

Accessories Operational manual............................. 1 PC.

Included Cable with the alli

ator pairs

( red & black ), LN-TL421.................... 1 PC.

2-2 Electrical Specifications (23 5 )℃

Current source

Ran

e Display Accuracy

Resolution

0 - 19.99 m

0.01 m

± ( 0.25 % FS + 1 d )

0 - 24 m

0.1 m

± ( 0.5 % FS + 1 d )

* Output 0 to 24 mA current for loads up to 500 ohms.

Output > 20 mA current for loads up to 400 ohms.

* FS : full scal

Current measurement

Ran

e Display Accuracy

Resolution

0 - 19.99 m

0.01 m

± ( 0.25 % FS + 1 d )

0 - 24 m

0.1 m

± ( 0.5 % FS + 1 d )

* FS : full scal

Power and current measurement of two wire loop

Ran

e Display Accuracy

Resolution

0 - 19.99 m

0.01 m

± ( 0.25 % FS + 1 d )

0 - 24 m

0.1 m

± ( 0.5 % FS + 1 d )

* Provides power DC 12V 2 V to the loop and measure

current.

* FS : full scal

DC mV source

Ran

e Display Accuracy

Resolution

- 199.9 mV 0.1 mV ± ( 0.25 % FS + 1 d )

+ 199.9 mV

* Output measured load impedance should > 1 K ohms.

* FS : full scal

Remark :

he above specification are tested under the environment

RF Field Stren

th less than 3 V/M & frequency less than th

30 MHz only.

3. FRONT PANEL DESCRIPTION

. 1

3-1 Display

3-2 Function Switch

3-3 Power Switch

Symbol

1 = On 0 = Off

3-4 Range Switch

3-5 Calibration Adjust knob

3-6 Battery Compartment/Cover

3-7 Input Socket

3-8 Cable Plug

3-9 Alligator Clips

4. MEASURING PROCEDURE

4-1 Current source

1)Install the " Cable Plug " ( 3-8, Fig. 1 ) into the " Input

Socket " ( 3-7, Fig. 1 ).

2)Slide the " Function Switch " ( 3-2, Fig. 1 ) to the

" CURRENT SOURCE " position.

3)Slide the " Range Switch " ( 3-4, Fig. 1 ) to " 0 -

19.99 mA " position for getting the 0.01 mA display

resolution ( max. display is 19.99 mA ). Slide the " Range

Switch " ( 3-4, Fig. 1 ) to " 0 - 24.0 mA " position for

getting the 0.1 mA display resolution.

4)Adjust the " Calibration Adjust knob " ( 3-5, Fig. 1 ) will

generate the current output same as the display value.

Note :

The " Red Alligator clip " ( 3-9, Fig. 1 ) is for the

positive current output. The " Black Alligator clip "

( 3-9, Fig. 1 ) is the " ground " for current output.

4-2 Current measurement

1)Install the " Cable Plug " ( 3-8, Fig. 1 ) into the " Input

Socket " ( 3-7, Fig. 1 ).

2)Slide the " Function Switch " ( 3-2, Fig. 1 ) to the

" mA MEASURE " position.

3)Slide the the " Range Switch " ( 3-4, Fig. 1 ) to " 0 -

19.99 mA " position for geeting the 0.01 mA display

resolution ( max. display is 19.99 mA ). Slide the " Range

Switch " ( 3-4, Fig. 1 ) to " 0 - 24.0 mA " position for

getting the 0.1 mA display resolution.

4)Open the circuit in which current is to be measured and

connect the " Alligator Clips " ( 3-9, Fig. 1 ) securely in

series with the load in which the current is be measured.

Note :

The " Red Alligator clip " ( 3-9, Fig. 1 ) is for the

positive current measurement input. The " Black

Alligator clip " ( 3-9, Fig. 1 ) is for the negative

current measurement input.

4-3 Self-powered two-wire current loop measurement

meter equivalant block diagram red

clip

DC 12 V + 19.99 +

2 V

POWER SOURCE Current meter black

clip

external

Fig. 2 measuring

load

1)Install the " Cable Plug " ( 3-8, Fig. 1 ) into the " Input

Socket " ( 3-7, Fig. 1 ).

2)Slide the " Function Switch " ( 3-2, Fig. 1 ) to the

" POWER/ mA MEASURE " position.

3)Slide the " Range Switch " ( 3-4, Fig. 1 ) to " 0 -

19.99 mA " position for getting the 0.01 mA display

resolution ( max. display is 19.99 mA ). Slide the " Range

Switch " ( 3-4, Fig. 1 ) to " 0 - 24.0 mA " position for

getting the 0.1 mA display resolution.

4)Open the circuit in which current is to be measured and

connect the " Alligator Clips " ( 3-9, Fig. 1 ) securely in

series with the load in which the current is be measured.

Note :

a.The " Red Alligator clip " ( 3-9, Fig. 1 ) is for

the positive current measurement input.

The " Black Alligator clip " is for the negative

current measurement input.

b.The measuring procedures & principal are the same

as those in 4-2 Current measurement except the

fact that the 12V DC power source is derived from th

calibrator rather than from an external voltage sourc

4-4 DC mV source

1)Install the " Cable Plug " ( 3-8, Fig. 1 ) into the " Input

Socket " ( 3-7, Fig. 1 ).

2)Slide the " Function Switch " ( 3-2, Fig. 1 ) to the

" VOLTAGE SOURCE " position.

3)Adjust the " Calibration Adjust knob " ( 3-5, Fig. 1 ) will

generate the voltage ( mV ) output same as the display value.

Note :

The " Red Alligator clip " ( 3-9, Fig. 1 ) is for the

positive voltage output. The " Black Alligator clip "

( 3-9, Fig. 1 ) is for the negative voltage output.

5. REPLACEMENT OF BATTERY

1)When LCD display show the " BAT " marker,

It is necessary to replace the battery. However,

in-spec measurement may still be made for several

hours after low battery indicator appears before the

instrument become inaccurate.

2)Slide the " Battery Cover " ( 3-6, Fig. 1 ) away from the

instrument by loss the screw and remove the battery.

3)Replace with 9V battery ( Alkaline or heavy duty type )

and reinstate the cover.

4)Make sure the battery cover is secured after change the

battery.

RS Components UK

el: 01536 201234

PO Box 99 Corby

Northamptonshire NN17 9RS

United Kin

dom Fax: 01536 405678

80009-CC-421-RS

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