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