M191 starts measure short current.
4. Select resistance range UUT necessary. Usetestleads deliveredwith
UUTsforhighertest voltages.
18 User Manual
.6 SHORT Short current mode
Short current mode (SHORT) designed enable verification short current capability UUTs -
megaohmmeters. Select SHORT mode pushing repeatedly FUNCTION FUNCTION DOWN button until SHORT label
appears the display.
I.
D.
G.M191 Insulation Tester Calibrator MEATEST. Activate UUT measurement, typically pushing button the UUT.
Be aware that the test voltage for high resistance
measurements dangerous and can cause
electric shock!
Testleads deliveredwiththe calibratorareapprovedforapplication upto5kVDC. Connect UUT the output terminals. Switch the UUT output OFF remove test voltage fromthe output terminals.
Display shows information follows:
Fig. Select requested test voltage level UUT. UUT starts source current. Connect output terminals the M191 pushing the button OUTPUT ON. Nominal input resistance 2.9 SHORT mode
- Measured short current mA
- Accuracy the measured value %.
Operating procedure
A.o.
C. Compare M191 reading UUT specification. M191
milliampermeter has one range mAwith five-digit resolution this mode.
B. Use test leads delivered with UUT whenever possible. Green LED starts light. M191 measures test current sourced UUT under short circuit condition.
H. s.r. Use only test leads with guaranteed isolation according test voltage
range UUT.
E. Disconnect M191 output terminals using the button OUTPUT ON. M191 calibrator measures the short current and displays it.5 kQ.
F
