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