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