METRAVI 15 CALIBRATOR OPERATION MANUAL VOLTAGE / mA CALIBRATOR

1 SAFETY INFORMATION

The following safety signs for operation are used through out the manual..!WARNNING .!CAUTION The instrument was not operated correctly, injury both to the calibrator or the operator

might occur .

NOTE Short annotation or additional explaination .

To avoid electric shock, injury or damage to the calibrator or operator , please follow the safety instruction

!WARNNING·Operate in gas：DO NOT operate the instrument under the condition where combustible gas, explosive gas

, dust and steam exists. it’s extremely dangerous.·Operation：DO NOT apply voltage over 30V to any two terminals and between terminal and GND.

!CAUTION·Disassembly：Only authorized and qualified operator is allowed to disassemble the unit. ·Cleaning：Periodically wipe the case with a damp cloth and detergent, do not use abrasives and solvents.

NOTE·Operation：To gurantee the accuracy, the instrument should be warmed up for at least 5 minutes after power

up. ·Operation：When not operate the instrument, it's better to turn off the power or set it to OFF position,that's the battery life can be longer; When output curent, it's better to use outside 24VDC power to make the battery life is longer.·Operation：If the user has special requirement on accuracy, please contact us.

document.doc Page 1 of 12

2 PANNEL DESCRIPTION

LCD displaying desciption

a) OUTPUT : when pressing 〔 INPUT/OUTPUT 〕 key, display will show the required mode as OUTPUT

b) INPUT : when pressing〔INPUT/OUTPUT〕key, display will show the required mode as INPUT c) CAL : Flashing CAL indicates Calibration mode is on.d) 0 FS : In CAL mode, it refers zero-scale or full-scale of current calibration e) : Low battery sign, new battery replacement is required .（see paragraph 3.1）f) : The output prompt positiong) V、mA 、% : The unit of input/output valueh) ON,OFF : Input or output active or on

document.doc Page 2 of 12

output value setting key

Output position selector

LCD Display

Power button

INPUT/OUTPUT

ON/OFF key

SHIFTAssistant operation key

V/mA function selector

mA / % selector

Input/Output terminal

3 REPLACING BATTERY AND FUSE

▲WARNING ·REPLACEMENT：Test leads will have to be removed from the terminals and unit should be off before any

attempt to replace fuse or battery.

3.1 If LCD shows ，battery is low. Replace the battery with new battery.3.2 If the output of the instrument does not change with the output of the pannel setting,

more likely the fuse blows, replace it as the following:1) Remove the testing lead and turn the power off.2) Remove holster, unlock the battery case and remove.3) Loosen the three bolts on the back case and open the front case.4) Replace the 0.1A / 250V fast-blow fuse on main board marked F1.5) Put case back in place.

4 Power on/off

4.1 POWER key operationpress POWER key to turn the power on, press it again over 1 sec. will turn it off.A self test is run during the initial power on and version VC 15 is displayed.

NOTE·ELECTRIFY：to assure correct electrifying, please reset after turning -off the power for 5 second .

4.2 Auto power-offDefault setting for auto power off is 10 minutes after idling (see paragraph 7）

5 Instrument output

DCV , DCA or analoge transducer which the user set is output from （OUTPUT）terminal.

!CAUTION!·OPERATION：do not apply voltage to output terminal, if improper voltage is applied, the inner circuit will be damaged.

OUTPUT OPERATING SEQUENCE

5.1 DCV

document.doc Page 3 of 12

FUNCTION OPERATION

% OPERATION DISPLAY SETTING RANGE

DCV 1O V DCA 20 mA

20 mA

%

0.0000 V

00.000 mA

-025.00 mA %

0.0000～11.0000 V

00.000～22.000 mA

-025.00～125.00 mA %

OUTPUT1) Insert the test leads of to V+ and COM jack of output terminal（OUTPUT） , and the other

point connect with the input terminal of user's meter. See the fig.

2) Press〔INPUT/OUTPUT〕key，and display‘OUTPUT’，the meter is in output mode.3) Press〔V/mA〕key, select V function, and display "V" unit. 4) Press〔〕/〔〕 key, select output setting position. 5) Press〔〕/〔〕key，change the value of setting position, the value can be auto up and down.

Hold the key, after 1 second, the value can be changed continuously.6) Press〔ON/OFF〕key, turn the power on/off, and display ‘ON’or‘OFF’.7) Press〔SHIFT〕 and〔〕key simultaneously, set the output to 0.0000V directly.

5.2 OUTPUT ACA1) Insert the test leads to + mA - jack of output terminal（OUTPUT）, and the other point connect

with the input terminal of user's meter. See the fig.

2) Press〔INPUT/OUTPUT〕key, and display‘OUTPUT’, the instrument is in output mode.3) Press〔V/mA〕key, select mA function, and display ‘mA’unit. 4) Press〔 % 〕key, select mA or % , and display ‘mA %’unit.

Therinto: 0 % value is 4mA；100 % value is 20mA . 5) Press〔〕/〔〕key, select output setting position. 6) Press〔〕/〔〕key, change the value of setting position, the value can be auto up and down. Hold

the key, after 1 second, the value can be changed continuously.7) Press〔ON/OFF〕key, turn output on/off, and display‘ON’or‘OFF’.8) Press 〔 SHIFT 〕 key and 〔 〕 key simultaneously, set the output setting to

00.000mA directly.

document.doc Page 4 of 12

5.3 ANALOGE TRANSDUCEER OUTPUT（SUCTION CURRENT）1) Insert the test leads to + mA SIMULATE - jack of the output terminal（OUTPUT） , and the

other point to input terminal of user's meter and power. See the fig:

2) Other key see paragraph 5.2 DCA output.

NOTE·Power range: 5～25VDC。·Operation：when output power, it's better to use outside 24VDC power, thus, can make the battery

life longer.

6 INSTRUMENT MEASUREMENT

▲WARNING·USAGE：the max. voltage is 30V for terminals and between terminals and GND, over it might damage the

instrument even people.

!CAUTION·USAGE：do not apply the overrange voltage or current to input terminal, it might damage the instrument.·USAGE：the power must be turned off before connecting to tested meter, or, it may damage the instrument.

INPUT OPERATION FLOW

document.doc Page 5 of 12

FUNCTION OPERATION

%OPERATION DISPLAYING

MEASUREMENT RANGE

DCV 1O V DCA 20 mA

20 mA

%

0.0000 V

00.000 mA

-025.00 mA %

0.0000～11.0000 V

00.000～22.000 mA

-025.00～125.00 mA %

6.1 DCV MEASUREMENT1) Insert test leads to V+ and COM jack of input terminal（INPUT）, and the other point connect

with output terminal of user's meter. See the fig:

2) Press〔INPUT/OUTPUT〕key and display‘INPUT’, the instrument is in input mode.3) Press〔V/mA〕key, select V function, and display ‘V’unit.4) Press〔ON/OFF〕key to start measuring, LCD shows ‘ON’，and display‘- - - -’for waiting, then,

display the measuring result.The refurbishing rate of displaying is approx. twice per second. If the measuring result is over the range, the display will show ‘—OL—’. Press 〔ON/OFF〕key to stop measuring, and display ‘OFF’and hold the present value.

6.2 DCA MEASUREMENT

1) Insert the test leads to mA and COM jack of input terminal（ INPUT） , and the other point connect with output terminal of user's meter. See the fig.:

2) Press〔INPUT/OUTPUT〕key, and display‘INPUT’, the instrument is in input mode.

document.doc Page 6 of 12

3) Press〔V/mA〕key, select mA function, and display ‘mA’unit.4) Press〔 % 〕key, select mA or % setting and display ‘mA %’unit.

Thereinto, 0 % value is 4mA；100 % value is 20mA 。5) Press〔ON/OFF〕key to start measuring, LCD displays‘ON’ and ‘- - - - ’for waiting..

The refurbishing rate for measuring is approx. twice per second. If the measured value is over range, LCD will display‘—OL—’.

Press 〔ON/OFF〕key again to stop measuring, LCD displays ‘OFF’ and hold the present value.

6.3 Supply 24V power to measure loop current1) Insert the test leads to +LOOP and mAjack of input terminal. See the fig.

2) The operations for other keys are the same as paragraph 6.2.

7 Other features

The following operations can change the function of auto power-off.1) Turn off the power.2) Press 〔POWER〕key and 〔RANG〕key simultaneously，the instrument is in maintaineace mode,

LCD displays‘AP -XX ’.3) press〔〕key , when displaying ‘AP- OF ’, the instrument is without auto power-off function; when

displaying ‘AP- ON ’, the instrument is with auto power-off function.4) Turn off the power again can exit the maitaineace mode.

document.doc Page 7 of 12

8 Performance figures

Output performance figures（18℃-28℃，1 year after calibration）OUTPUT RANGE

OUTPUT RANGE

RESOLUTION ACCURACY NOTE

VOLTAGE 10V 0.0000～11.0000V 0.1mV 0.02% rgd +0.01% rangeMax. output current 10mA

CURRENT 20mA 0.000～22.000mA 0.001mA 0.02% rgd +0.01% rangeMax. load for 20mA 1KΩ note 1

analogetransducer（ suction current） -20mA 0.000～-22.000mA .001mA 0.02% rgd +0.01% range

Max. load for 20mA 1KΩNote 2

LOOP POWER 24V 10%

Max. output current: 25mA

Output performance figures（18℃-28℃，1 year after calibration）INPUT RANGE

INPUT RANGE

RESOLUTION ACCURACY NOTE

VOLTAGE 10V 0.000～11.000V 1mV 0.02% rgd+0.01% range Input resistance2MΩ

CURENT 20mA 0.000～22.000mA

0.001mA 0.02% rgd +0.01% range Input resistance10Ω

LOOP CURRENT

20mA 0.000～22.000mA

0.001mA 0.02% rgd+0.01% range Supply 24V loop current

NOTE 1: when battery is over 6.8V, max. load for 20mA is 1KΩ；when battery is 5.8V～6.8V max. load for 20mA is 700Ω.

NOTE 2: power supply range:5～25VDC.NOTE 3: temperature coefficient: 0.005% range / ℃（5℃～28℃、18℃～40℃）.

GENERAL FEATURES

· power supply : 9V battery（ANSI/NEDA 1604A or IEC 6LR619V alkaline）or AC power adapter（VCPS）（optional）

· battery life : approx. 12hrs / 10mA · max. allowable voltage : 30V（each terminals and between terminals and GND）

· operation temp. : 0C～50C

document.doc Page 8 of 12

· operation humidity : ≤ 80%RH · storage temp. : ≤ - 10C～55C

· storage humidity : ≤ 90%RH · dimension : 200×100×40mm（including holster） · weight : 550g（including holster）

· acessories : instruction manual, industry testing leadCF-36（probe with alligator clip）· optionals : AC power adapter（VCPS）,industry testing lead CF-31-A（probe clip）· safety :

9 CALIBRATION

NOTE·calibration：to guarantee the accuracy, we recommend to calibrate the instrument yearly. There are

some examples below: !CAUTION

·operation ： do not exceed the max. allowable input value to input terminal, or, the input part may be damaged.

·operation：do not make short circuit or exceed the max. allowable voltage to output terminal, or the inner circuit may be damaged.

9.1 Selecting standard equipmentOutput performance calibration

CALIBRATING ITEM

STANDARD INPUT RANGE

ACCURACY RECOMMENDATION

DCV 10V Digital multimeter

MAX. 11V ±（10ppm＋50uV） 1281(FLUKE)or equal

DCA 20mA Digital multimeter

MAX. 22 mA ±（50ppm＋0.4uA） Input performance calibration

CALIBRATING ITEM

STANDARD OUTPUT RANGE

ACCURACY RECOMMENDATION

DCV 10V Standard source 10V ±（12ppm＋15uV） 5520(FLUKE)or equalDCA 20mA Standard source 20mA ± （ 100ppm ＋

0.2uA）9.2 condition for calibration

temperature ： 23 ± 1 CRH humidity ： 45～75% R·H

preheat ： ·the standard equipment must be preheated for a certain time. ·put this instruction in calibrating condition for 24hrs, then, turn power on, and set to non-auto

power-off mode, preheat for 1 hour.

NOTE·power supply for calibration ： it’s better to use AC power adapter（VCPS） for power supply, if

haven’t, rereplace a new battery.

9.3 Output calibration operation

document.doc Page 9 of 12

To calibrate according to the following:

9.3.1 10V range calibration1) see the fig.

2) press simultaneously 〔POWER〕,〔V/mA〕,〔%〕key, into 10V output calibration mode, and display‘OUTPUT’,‘CAL 0’,‘OFF’ ,‘V’unit.

3) Set the multimeter to a proper range.4) press〔ON/OFF〕key, turn ouuput on, then display‘ON’.5) When output is stable, adjust the displaying value, make it is the same as that of multimeter

by 〔〕/〔〕,〔〕/〔〕key.6) press〔SHIFT〕key and〔〕key simultaneously, display blinks, it means the calibration point

is stored.7) press〔%〕key, display‘CAL FS’, when output is stable, redo step 5 and 6.8) press〔%〕key, display‘CAL 0 FS’, when output is stable, redo step 5 and 6.

NOTE·calibration store ：when pressing〔SHIFT〕key and 〔 〕key to store calibration point, if

displays‘NoCAL’,it means the calibration point isunvalid..

9.3.2 20mA range calibration1) see the fig.

document.doc Page 10 of 12

NO. OUTPUT RANGE

CALIBRATION POINT

1． 10.0000 V 0FS0 FS

2． 20.000 mA 0FS

2) press〔V/mA〕key into 20mA output calibration mode, and display‘OUTPUT’,‘CAL 0’,‘OFF’and‘mA’unit.

3) Redo 9. 3. 1 step 3～7.

9.4 input calibration operation

to calibrate according to the following:

9.4.1 10V range calibration1) see the fig.

2) Press 〔 INPUT/OUTPUT 〕 key to be in input 10V calibration mode, and display‘INPUI’,‘CAL 0’,‘ON’and‘00.0000V ’.

3) Set the standard source to a proper range.4) Set the output of the standard sourceas the instrument’s displaying value, when output is

stable, press〔SHIFT〕key and〔〕key, displaying blinks, it means the calibration point is stored.

5) Press〔%〕key, make LCD display ‘CAL FS’and‘10.0000V ’，, redo step 4. document.doc Page 11 of 12

NO. OUTPUT RANGE

CALIBRATION POINT

1． 10.0000 V 0 : 00.0000VFS : 10.0000V

2． 20.000 mA 0 : 00.000mAFS : 20.000mA

9.4.2 20mA range calibration1) see the fig.

2) press 〔 INPUT/OUTPUT 〕 key into 20mA input calibration mode, and display‘INPUI’,‘CAL 0’,‘ON’and‘00.000mA ’.

3) set the standard source to a proper range.4) Set the output of standard source as the instrument displayinf alue, when output is stable,

press〔SHIFT〕key and〔〕key, display blinks, it means the calibration point is stored.5) press〔%〕key and display‘CAL FS’and‘20.000mA ’, redo step 4. 6) turn off the power again can exit the calibration mode.

10 NOTE

The specifications are subject to change without notice.

The content of this manual is regarded as correct, if any error or in doubt, please contact us.

We will not be responsible for accident or injury caused by improper operation.

The function descripted in this manual can not be the reason of special usage.

document.doc Page 12 of 12