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