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D. Setupresistance not changed. Decrease test voltagebefore continue. Green LED starts light. Compare UUT reading M191 set resistance. UUT starts source test
voltage.
Before the output terminals are switched ONstate, calibrator measures test voltage. Insteadofthis “Err1 Toohigh
test voltage! ”isdisplayed.
Change the resistance value allowedonly when attached test voltage lower than Voin TableII.
- Accuracy.
G.
Don't changesetresistance value when test voltageabove Vois connectedtotheoutputterminals, see tableII. Select HVR mode pushing repeatedly FUNCTION FUNCTION DOWN button until HVRlabel
appears the display. Switch
offthetest voltagefirstordecreaseits valuetolevellowerthanshown inthetableII. Calibrator displays accuracy selected resistance point %. Disconnect M191 output terminals using the button OUTPUT ON. Select resistance range UUTif necessary. the test voltage is
higher than the limits TableII, calibrator does not execute the ONcommand. Usetestleads deliveredwith
UUTsforhighertest voltages.
4.
M191 starts measure test voltage and current. Connect UUT the output terminals. Use test leads delivered with UUT whenever possible. Select requested test voltage level UUT. During the
measurement the calibrator goes automatically through sequence statues: OFF, STANDBY, RUNNING, OFF. M191 calibrator measures the test voltage and display both test voltage and current. Enter requested resistance value using either numerical keyboard rotary button.r. Test current not displayed when set
resistance higher than 300. Connect output terminals the M191 pushing the button OUTPUT ON.
16 User Manual
.
I.0 GQ.
C.
Operating procedure
A. Calibrator can measure
time interval for what the UUT test voltage presented the calibrator output terminals.o. The value
cannot modified.
E. Use only test leads with guaranteed isolation according test voltage
range UUT.
Notes:
Testleads deliveredwiththe calibratorareapprovedforapplication upto5kVDC. Confirm the value by
pushing the appropriate unit button kQ, MQ, TQ.
In Timer function calibrator automatically connects the output terminals resistance value 100 MO.
Be aware that the test voltage for high resistance
measurements dangerous and can cause
electric shock!
M191 Insulation Tester Calibrator________________________________________ MEATEST, s.
J.
F.5 TIMER Timer function
Timer function allows verify Timer features safety testers and megaohmmeters.Test current displayed only when output terminals are ON. the test
voltageis over Voandattempt change theresistance isregistered, calibrator doesnot disconnect theoutput
terminals andshows errormessage “Err2 Set voltage bellow !”.
B. Activate UUT measurement, typically pushing button the UUT. Switch the UUT output OFF remove test voltage from its output.
H
