Special Applications
Section 2
Page 60
2. W ater In Cable Ć Resistance Faulted Pair
2.1 Where water in the cable causes a resistance fault, the
unit measures to the middle of the wet section, or the
average of the total resistance faults. Use the following
procedure to estimate
the length of cable damaged by water:
a. Measure the length of the cable (DTS) with the
RFL function.
b. Measure the tip or ring length of the cable again,
using the OPENS function.
c. The equivalent length of water in the cable is the
OPENS measured length minus DTS measured
length divided by two.
Example:
DTS reading = 680 ft/207 m
OPENS reading = 1130 ft/344 m
length of wet cable =
(1130-680)
=
225 ft/68.5 m
2
DTS = 680ft/207 m
OPENS = 1130ft/344 m
1130 - 680 = 450
450
÷ 2 = 225 ft/68.5 m of wet cable
Water in Cable - Resistance Faulted Pair
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