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