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