When the test voltage disconnected UUT, calibrator stops operation, goes over statue OFF,
disconnect output terminals and hold value measured time interval and maximum test voltage which has
been detected during the period.
B. Select TIMER mode pushing repeatedly FUNCTION FUNCTION DOWN button until TIMERlabel
appears the display.
M191 goes over STANDBY.
11.0 s
Umax:0 . Green LED starts light.r. Select function
TIMER UUT and set-up requested time interval.
- Test voltage.
E.___________________________ M191 Insulation Tester Calibrator
0. Select resistance range UUT necessary.
- Vmax parameter maximum test voltage which
interval the Timer calibration.
Calibrator displays current time interval and current test voltage.
In this mode calibrator counts time for which the valid test voltage attached the output terminals. s. Switch output terminals the M191 ONby pushing the button OUTPUT ON.
- Accuracy the measured time interval s.Display shows information follows (Standby mode):
MEATEST. Select requested test voltage level UUT. Use test leads delivered with UUT whenever possible. Connect UUT the output terminals.0 £
Umax:0 .000k U
STAND BY
Local
Gnd
Test- voltag 0.
Notes:
Donotdisconnectconnectionbetween UUTandM191 calibratorotherwise themeasuredvaluesarenot valid.002 Mode:
TIMER
ACCURACY
0 'T/
Fig. This statue signalized with the label right upper corner the display.
D. 2:-;
Fig. Minimum guaranteed valid test voltage which
can caught the calibrator 100 VDC.
C. Current test voltage presented the
process.229kU
OFF
Local
Grid
Test, 11a'EJe: Mode :
TIMER
ACCURACY
0. Use onlytest leads with guaranteedisolationaccording totest voltage
range UUT.
F.
has been caught the calibrator during time
calibrator output terminals during calibration
User Manual v16 17
.
In STANDBY mode the calibrator waiting for test voltage. Compare M191 time interval reading the UUT preset time.o. Timer mode STANDBY
- Measured time seconds with 100 resolution.
Operating procedure
A. When valid test voltage identified the output terminals, the calibrator goes over RUNNING statue.8 Timer mode OFF
G
