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