Repairing sensor cables
Page 156 OmniTrax Product Guide
Replacing decouplers
If the decoupler is faulty:
1. Remove the faulty decoupler and the TNC connectors.
2. Examine the cut ends of the cables for any signs of corrosion on the center conductor.
If any corrosion is present, strip back the cable until you reach uncorroded center conductor.
3. Install new TNC connectors and decouplers, as required.
4. Test the replacement connector and decoupler to ensure proper installation. See Cable tests
on page 146.
5. Reinstall the decoupler and retest the cable set.
6. Apply heat to seal the heatshrink (see Sealing the heatshrink over decouplers/splices
on page
133).
Assessing cable damage
A minor cut in the outer jacket, which appears to be only superficial damage may actually be
serious if the cut penetrates both cable jackets. Repair any visible cable damage. Even superficial
cuts or scrapes can allow water to enter the cable and cause internal damage.
When you are assessing damaged cable, and there are signs of corrosion, cut back and remove
the jacket until you reach an uncorroded section. Using the cable damage assessment table,
classify the damage based on the length of sensor cable that must be replaced.
Required equipment
• heat gun
• measuring tape
•shovel
• garden rake
• cleaning supplies - water with mild detergent, cloth, paper towels
Note Do NOT shrink the heatshrink until after the new connectors and
decouplers are tested.
Damage level Description
Superficial damage
on page 157
a small, single-point cut or scrape through the
outer cable jacket resulting in no internal damage
Minor damage
on page 157
a cut less than 1 cm (0.4 in.) long through the
outer cable jacket, resulting in internal damage,
(i.e., damage to inside black jacket, foil, dielectric,
center conductor)
Moderate damage (1 to 45 cm)
on page 158
a damaged section more than 1 cm (0.4 in.) but
less than 45 cm (18 in.) long
Severe damage
on page 159
a damaged section more than 45 cm (18 in.) long
Cable damage assessment table
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