8 DPP Dielectric andpolarization parameters
DPP function enables direct calibration isolation meters which are equipped with function DAR (dielectric
absorption ratio), (polarization index) (polarization ratio).
Thecapacitancefunctionisdesignedfortestingofinsulationmetersandmegaohmmeters which canmeasure the
capacitance test circuit based charging and discharging the circuit.
4.o. Similarly the PSP mode the DPP mode is
based switching three different values resistance the output terminals predefined time sequence.
Be aware that the test voltage for high resistance
measurements dangerous and can cause
electric shock!
Testleads deliveredwiththe calibratorareapprovedforapplication upto5kVDC.
DAR (60s) (30s)
PI parameter has similar definition.
PI (600s) (60s)
PR parameter defined ratio resistance measured after the test voltage connected the
measured object and resistance measured 180 after the test voltage connected. defined ratio resistance R1measured after the test voltage is
connected the measured object and resistance measured 600 after the test voltage connected.r. Disconnection can cause damageofthe calibrator.Disconnect M191 output terminals using the button OUTPUT ON. When using
ACvoltageover 100 Vthe calibratorcanbedamaged.
M191 Insulation Tester Calibrator________________________ MEATEST.
Parameters definition
In isolation testers DAR parameter defined ratio resistance R1measured after the test voltage is
connected the measured object and resistance measured after the test voltage connected.
Notes:
The capacitancefunction designedfor DCapplications. test voltage not allowed apply.
PR (180s) (15s)
The calibrator has predefined the time sequences both for DAR and parameters simulate these parameters.
Don'tdisconnecttest wires whenmeasuringisinprocess. Usetestleads deliveredwith
UUTsforhighertest voltages. Any other application not
recommended.
Depending status, the DAR mode can one following submodes:
Operating modes
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