Fault Mapper Pro
®
Model CA7027
7
3.1 Accuracy
The CA7027 is able to measure distances to faults and cable lengths to
an accuracy of ±1%.
This measurement accuracy is based on the correct value of Vp being
used for the cable under test, and homogeneity of the Vp along the cable
length.
If the Vp is set incorrectly by the operator, or the Vp varies along the length
of the cable, then additional errors will be incurred and the measurement
accuracy will be affected.
NOTE:
The Vp is less well defined with unshielded multicore cable, includ
-
ing power cable, and is lower when a cable is tightly wound on a drum than
when installed.
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