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