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