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