___________________________ M191 Insulation Tester Calibrator
Procedure recommended for verifying parameters the calibrator described this chapter.
Configuration the calibrator
Calibrator should tested directly from the front panel terminals.
* 81/2 digit multimeter Agilent 3458A pA-meter Keithley 2635A similar with current range100
nA mA
* RLC meter Agilent 4263A, Agilent 4278A, other with accuracy 0. Calibrator have temperature stabilize condition
at minimum hours before performance verification test started. Set resistance values 10kQ 100 the calibrator. minutes after switching on.01 accuracy and range GQ. Recommended test points including applied
method specification and allowed limits are shown table Tab V.
Required equipment
Following instruments are required for calibration:
* 81/2 digit multimeter type Fluke 8508A similar with 0.
2.
* High voltage source Heinzinger PNC-10000 similar with output voltage accuracy 0.
3.e.Verification procedure
MEATEST.
* Process calibrator Burster 4423, Fluke 745A similar with current range and accuracy
better than . s. Connect calibrator output standard multimeter type according the table Tab select function of
ohmmeter. Check reading the standard multimeter and
compare with limits the table TabV.
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* Multifunction calibrator Meatest M-140, M142, Fluke 5500A similar with voltage range 1000
V.
Basic steps oftheperformance verification test
Verification procedure consists following steps:
• range from 1TQ
• lta ranges kV
• range mA
• test points 10n, 50n, 100nF
Procedure
Following part describes procedure performance verification test. Performance verification may performed
after warm-up period i. Connect the calibrator the mains and let them switched for least one 15minutes laboratory at
23±1 oC.2%.r.o.
R tio n
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