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