Performing An Mh Calibration Test/Adjustment; Performing An Mh Calibration Test/ Adjustment; Preliminary Steps; Calibration Procedure - GE Moisture Image 1 Series Service Manual

June 2003
Performing an MH
Calibration Test/
Adjustment

Preliminary Steps

Calibration Procedure

1-20
If you modify the supplied cables or do not use standard GE
Panametrics-supplied cables, you must perform a calibration test/
adjustment to test the cable and, if necessary, compensate for any
error or offset introduced by splicing or long cable lengths. This
procedure is also recommended for testing the installation of GE
Panametrics cables.
IMPORTANT: The following procedure does not apply to Moisture
Image Series Probes.
1. Power up the Series 1.
2. Set up the matrix format on the screen to display MH for each
channel where you are checking a M or TF Series cable. Refer to
Setting Up the Matrix Format in Chapter 2 of the Programming
Manual.
3. Make sure high, low and zero reference values are recorded on the
sticker located on the inside chassis of the unit, or on the Program
Information List provided in Appendix A of the Startup Guide.
1. Disconnect the probe from the cable (leave the probe cable
connected to the electronics unit) and verify that the displayed MH
value equals the zero reference value within ±0.0003 MH.
•
If this reading is within specification, no further testing is
necessary.
•
If the reading is less than the specified reading (previous
recorded zero reference value ±0.0003 on sticker), add this
difference to the low reference value.
•
If the reading is greater than the specified reading (previous
recorded zero reference value ±0.0003 on sticker), subtract this
difference from the low reference value.
2. Note the final corrected low reference value and record it.
Installing Optional Features