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