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