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