Triplett PairMaster 3240-22, Instruction Manual

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A multiple failure on a pair is a condition where more than
one fault is present. One example of this is when a pair has
one conductor open and the other conductor crossed (short
circuited) to another pair (Fig. 3). The first will indicate an open
pair and the second will indicate a crossed pair.
Another example of a multiple failure is when two pairs are
transposed, and one of the transposed pairs is reversed in
polarity (Fig. 4).
In both situations, the PairMaster will still display a FAIL LED
but will only inform the user of the highest priority fault. The
user, upon checking the pair, will discover the lower priority
fault also. In most applications, the cable is wired incorrectly
and will require rewiring regardless of the error displayed.
The PASS/FAIL LED of each pair, will retain its status until all of
the pairs are tested. At the conclusion of testing all four pairs,
the digital display will show the number of the Remote Identi-
fier for about two seconds. If the cable can not be identified
(typically when all pairs are shorted or open), a “no” “id” mes-
sage will flash. When the final display is over, the PairMaster
will shut itself off. Another cable can be tested by repeating this
procedure.
Figure 4
Figure 3