Repairing sensor cables
Page 160 OmniTrax Product Guide
The following procedure applies to OC2/SC2 sensor cable. Use this procedure and refer to figures
Figure 125:
to repair severe damage that is less than 3 m in length for SC1 and sensor cable.
There are no kits available for SC1 and SC2 sensor cable. You require an equal length of detecting
cable from anywhere along the length of a cable, plus male TNC connectors, female couplers and
heatshrink (46 cm for SC1, - 30 cm for SC2).
1. Cut out the damaged section of cable.
2. Examine the cut ends of the cable 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. Classify the cable damage based on the length of removed cable. If removing corroded cable
resulted in an increase in the length of the damaged cable to more than 3 m, refer to the
severe damage > 3 m section for additional information. See Cable damage assessment table
on page 156.
4. Cut the replacement section of sensor cable to the correct length (add approximately 5 cm,
2 in. to the cut length, as a precaution).
5. Using a damp cloth and mild detergent, clean and dry the two cable sections thoroughly where
the damaged section was removed.
6. Install one male TNC connector each on the two cut cable ends and on both ends of the
replacement cable. See Installing connectors on OC2 sensor cable
on page 121.
7. Test the connectors for proper installation. See Cable tests
on page 146.
8. Slide on the two pieces of heatshrink tubing, and connect the replacement section of cable by
joining the male connectors with two female to female couplers.
9. Retest the cable set and install the repaired cable.
10. Apply heat to seal the heatshrink (see Sealing the heatshrink over decouplers/splices
on page
133).
11. Note the location and a brief description of the cable damage on the site plan.
Severe damage (> 3m)
The foil opening in the detecting sensor cable is graded over the length of the cable to compensate
for signal attenuation, and to provide uniform detection. When replacing a damaged section of
detecting cable longer than 3 m, you must match the replacement section’s graded foil opening
with the graded foil opening in the damaged section. To accomplish this, you require a new sensor
cable of the same length as the damaged cable. To match the graded foil openings, align the red
bands, roll out the replacement cable and cut out the replacement section at the same relative
location as the damaged section of cable.
Figure 141: Repairing severe damage (< 3 m) - OC2 cable
Note If you are using 400 m OC2 cable, and the damage is before the 300 m
point, you can use a 300 m replacement cable for the repair.
heatshrink
30 cm (12 in.)
female TNC coupler
45 cm to 3 m
(18 in. to 10 ft.)
male TNC connectors
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