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