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M4000 Insulation Analyzer User Guide

72A-1230 Rev. F 4-31

July 22, 2005

Field Recalibration

Run this test if any of the Calibration Verification test ratings are Re-Cal or

Fail. With the M4100 Field Calibration feature, calibration can be done in the

field for 7 of the current ranges if the optional M4151 Field Calibration

Reference is used, and for 3 ranges if the optional M4150 Field Calibration

Reference is used. The optional Field calibration Reference, if available, is

located on the face of the M4100 Instrument. Test result information may be

found in the fieldcal.log and currfcal.log files, both found in the DTA

directory.

The Optional M4150

Field Calibration

Reference

Figure 4.10 M4150 Field Calibration Reference

This is the reference box that has been used since the inception of the M4000.

Using the M4150, the M4000 software performs a reference test on the test set

for the three middle current ranges (10, 30, and 100 mA). The M4100

calibration can be checked, and, if necessary, adjusted. Except for special

certification requirements, usually reserved for testing at Nuclear Power

Plants, the reference check and calibration made possible by the M4150

should be more than adequate to assure accurate data.

The Optional M4151

Field Calibration

Reference

Figure 4.11 M4151 Field Calibration Reference

doble M4200c User Manual

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