Precautions For Modified Or Non-Ge Panametrics Cables - GE Moisture Image 1 Series Service Manual

Precautions for Modified
or Non-GE Panametrics
Cables
Installing Optional Features
Many customers must use pre-existing cables, or in some cases,
modify the standard GE Panametrics-supplied moisture cable to meet
special needs. If you prefer to use your own cables or to modify our
cables, observe the precautions listed below. In addition, after
connecting the moisture probe, you must perform a calibration
adjustment as described on page 1-20 to compensate for any electrical
offsets.
GE Panametrics cannot guarantee operation to the
specified accuracy of the Series 1 unless you use GE
Panametrics-supplied hygrometer cables.
•
Use cable that matches the electrical characteristics of GE
Panametrics cable (contact the factory for specific information on
cable characteristics). The cable must have individually shielded
wire sets. A single overall shield is incorrect.
•
If possible, avoid all splices. Splices will impair the performance.
When possible, instead of splicing, coil the excess cable.
•
If you must splice cables, be sure the splice introduces minimum
resistive leakage or capacitive coupling between conductors.
•
Carry the shield through any splice. A common mistake is to not
connect the shields over the splice. If you are modifying a GE
Panametrics cable, the shield will not be accessible without cutting
back the cable insulation. Also, do not ground the shield at both
ends. You should only ground the shield at the hygrometer end.
Caution!
June 2003
1-3