B. Select resistance range UUT necessary.
Display shows information follows:
Fig. Activate UUT measurement, typically pushing button the UUT. Compare M191 reading UUT specification.
C. Switch the UUT output OFF remove test voltage fromthe output terminals.o. M191 calibrator measures the short current and displays it. Usetestleads deliveredwith
UUTsforhighertest voltages.
D. M191 measures test current sourced UUT under short circuit condition.
I. Select SHORT mode pushing repeatedly FUNCTION FUNCTION DOWN button until SHORT label
appears the display.M191 Insulation Tester Calibrator MEATEST.
E.
4. Green LED starts light.
H. Use only test leads with guaranteed isolation according test voltage
range UUT.
18 User Manual
.
Be aware that the test voltage for high resistance
measurements dangerous and can cause
electric shock!
Testleads deliveredwiththe calibratorareapprovedforapplication upto5kVDC.
G. Nominal input resistance 2. Disconnect M191 output terminals using the button OUTPUT ON.6 SHORT Short current mode
Short current mode (SHORT) designed enable verification short current capability UUTs -
megaohmmeters. M191
milliampermeter has one range mAwith five-digit resolution this mode. Connect UUT the output terminals. Use test leads delivered with UUT whenever possible.5 kQ. s.
M191 starts measure short current.r.
Operating procedure
A. Select requested test voltage level UUT.
F.9 SHORT mode
- Measured short current mA
- Accuracy the measured value %. Connect output terminals the M191 pushing the button OUTPUT ON. UUT starts source current
