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.
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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
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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
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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.
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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
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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.
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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.
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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
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· 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
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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.
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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.
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