107
Reference Manual
00809-0100-4772, Rev FA
Troubleshooting
March 2016
Troubleshooting
A common problem can be a cable installed in the field that is exposed to the
elements. It can absorb moisture and thus lower its insulation resistance. Measure
for shorts, opens, and low IR (insulation resistance) as shown in Figure 7-17 and
Table 7-3.
Figure 7-17. Remote Mount Cable Test Points
Table 7-3. Test Points
PINS DC resistance Comments
A to B 0.3 to 5 ohms Depends on cable length
C to D 0.3 to 5 ohms Depends on cable length
C to E 0.3 to 5 ohms Depends on cable length
D to E 03 to 5 ohms Depends on cable length
A to C,D or E Greater than 1 MΩ If cable has absorbed moisture.
It will lower the IR
B to C,D or E Greater than 1 MΩ If cable has absorbed moisture.
It will lower the IR
PINS Capacitance Comments
A to B 25 pfd/ft Depends on measuring device
used.
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