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