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