Operation
Section 1
Page 44
Splits
Hook-up:
As instructed on the unit’s display screen
– varies by application, see p. 46
About the Splits Test
Use “LOCATE SPLIT” in the OPENS function to locate
splits of two or more pairs open at both ends of the
section. The pairs must have NO opens, shorts, grounds,
or battery crosses. You must know the length of the cable
section. The pair capacitance must be balanced (see
hookup examples for balance check following the
flowchart.)
When a pair has been “corrected” by splitting the pairs
back at a different location, excessive crosstalk may
result. To correct the original split and the “correcting”
split, use the “far-end to split” measurement to get the
distance between the splits. Then get between the two
splits, disconnect the wires, and measure to the splits
using the simple splits hook-up to remeasure one split in
each direction.
Note: Splits can only occur at splice points. It is recommended
to test for a split from both ends of the section, then average
the distances and open the splice point closest to this average.
Caution
If hazardous voltage warnings are displayed when the test set is
switched on or reset (or at any time during the testing
procedure) follow standard procedures for de-energizing and
discharging cables.
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