Ametek Drexelbrook IntelliPoint RF RNL Series, Installation And Operating Instructions Manual

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Troubleshooting
27
Figure 4-4
Testing Integral Cable
4.7 Testing the Integral Cable
4.8 Testing the Remote Cable
1. Disconnect integral cable from electronic.
2. Check for continuity.
a. Using an ohmmeter measure the resistances.
i. From the center wire connection on the RCA plug to
the sensing element active section (center wire)
ii. From the shield connection on the RCA plug to the
sensing element shield.
iii. If resistance is greater than 5Ω the cable has failed.
3. Check for shorts.
a. The integral cable is tested as part of sensing element
test, section 4.6 .
1. Disconnect remote cable from electronic unit and sensing
element.
2. Using an ohmmeter measure the resistances as shown in
Figure 4.5
a. Check for shorts.
i. Connect ohmmeter to cable center wire and ground
wire. Measure resistance as shown.
ii. Move ohmmeter leads and repeat for all measurements
shown.
iii. If resistance is less than 100 k-ohms cable has failed
b. Check for continuity.
i. Short center wire to ground wire and measure
resistance as shown. Should be close to 0 ohms
ii. Short center wire to shield and repeat.
iii. If resistance is greater than 10 ohms cable has failed