M191 starts measure short current.
MEATEST, s.
- Test voltage.7 HVC High voltage capacitance
In High voltage capacitance function (HVC) the calibrator enables connect the output terminals one three
high voltage capacitors which are built-in the calibrator. M191 calibrator measures the short current and displays it. terminal connectedto
protection earthpotential._________________________________________M191 Insulation Tester Calibrator
4.
B. Start UUT measurements, typically pushing ONbutton the UUT.
C.10 High capacitancemode
- Calibration value the selected capacitor
- Vmax. Sense the capacitance function offer tool for
calibration those megaohmmeters and insulation testers which can measure also capacitance.
G.o. Use test leads delivered with UUT whenever possible.Notes:
Whenin SHORTmode, groundingoftheLfrontpanel terminal always set ON. Calibration value the selected position will appear. Maximum allowed test voltage. Select requested test voltage level UUT. UUT starts sourceDCcurrent.
I.r. Green LEDstarts light. Select resistance range UUT necessary.
When HVC mode the display shows information follows:
Fig.
E.
H. Connect UUT the output terminals. Connect output terminals the M191 pushing the button OUTPUT ON. Use only test leads with guaranteed isolation according test voltage
range UUT. the output terminals currently connected test voltage
- Accuracy the set capacitance %.
D. Compare M191 reading UUT specification.
F. Switch the UUT output OFF remove test voltage fromthe output terminals. Select requested test voltage level UUT.
Operating procedure
A. Select HVC mode pushing repeatedly FUNCTION FUNCTION DOWN button until HVC label
appears the display. Set nominal value the requested capacitor using numerical keyboard and
confirmby ENTERbutton. Select resistance range UUT necessary.
User Manual v16 19
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The calibrator equipped with capacitors with nominal values 10, 50, 100 nF. Maximum test voltage 000
VDC.
TypicalshortcurrentofUUTs megaohmmetersisseveralmAmax