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