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