TM 11-6625-648-12
Figure 3-10. CX-4245/G connections for bridge-circuit operation if cable is broken
or cable connectors are damaged.
(d) The pointer of the DISTANCE TO
(2) Open-circuit checks.
( a ) Connect the suspected CX-4245/G
FAULT control knob will indicate
the approximate distance to the
to the TS-1323/PTM-l as shown
short circuit (in thousands of feet)
in figure 3-9 or 3-10.
a s indicated by the RES scale
(b) Pull out the BATTERY POWER
(outer scale). The CX-4245/G re-
s w i t c h ; operate the CAP-RES
sistance will vary with changes in
switch to CAP and the METER
the ambient temperature. The re-
SELECT switch to BRIDGE.
sults obtained should be plotted
against the temperature-compen-
(c) Depress and hold the READ switch.
sation curves shown in figure 3-11.
Slowly adjust the DISTANCE TO
The DISTANCE TO FAULT con-
F A U L T control until the TEST
trol may be read directly if the
METER indicates zero (or null).
cable temperature is 75 F.
(d) The pointer of the DISTANCE TO
Example: If the DISTANCE TO
FAULT control knob will indicate
FAULT control indicates 2 (2,500
the approximate distance to the
feet) on the RES scale at the am-
open circuit (in thousands of feet)
bient cable temperature of 30 F,
as indicated by the CAP scale (in-
the distance to the short should
ner scale).
be approximately 2,310 feet.
3-13
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