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. When valid test voltage identified the output terminals, the calibrator goes over RUNNING statue. Compare M191 time interval reading the UUT preset time.
- Vmax parameter maximum test voltage which
interval the Timer calibration.___________________________ M191 Insulation Tester Calibrator
0. Minimum guaranteed valid test voltage which
can caught the calibrator 100 VDC.
- Test voltage.
M191 goes over STANDBY. Select requested test voltage level UUT. Select function
TIMER UUT and set-up requested time interval.
- Accuracy the measured time interval s. Current test voltage presented the
process.
B.8 Timer mode OFF
G. Timer mode STANDBY
- Measured time seconds with 100 resolution.
In STANDBY mode the calibrator waiting for test voltage. Green LED starts light.
Notes:
Donotdisconnectconnectionbetween UUTandM191 calibratorotherwise themeasuredvaluesarenot valid. This statue signalized with the label right upper corner the display.
Calibrator displays current time interval and current test voltage.
C.
In this mode calibrator counts time for which the valid test voltage attached the output terminals.002 Mode:
TIMER
ACCURACY
0 'T/
Fig.
11. Use onlytest leads with guaranteedisolationaccording totest voltage
range UUT.o.229kU
OFF
Local
Grid
Test, 11a'EJe: Mode :
TIMER
ACCURACY
0.r.
Operating procedure
A.Display shows information follows (Standby mode):
MEATEST.
D. Switch output terminals the M191 ONby pushing the button OUTPUT ON. s. Select resistance range UUT necessary.
E.
has been caught the calibrator during time
calibrator output terminals during calibration
User Manual v16 17
. 2:-;
Fig.000k U
STAND BY
Local
Gnd
Test- voltag 0.0 £
Umax:0 .
F. Select TIMER mode pushing repeatedly FUNCTION FUNCTION DOWN button until TIMERlabel
appears the display. Use test leads delivered with UUT whenever possible.0 s
Umax:0 . Connect UUT the output terminals
