CableMaster 500
18
The capacive value is used in measuring the length of a cable. The
values are preset in the tester, but a custom value can be set for more
accurate measurements. To calibrate the value for a specic cable, use a
known length of cable, 15 feet or more is recommended. Test the cable
and adjust the capacive value unl it shows the actual length of the
cable. Press “OK” to save the value. The tester is now set for the same
spool of cable that you used to calibrate the capacitance for.
With AUTO-LENGTH selected, set the capacitance value. The rst pair
that does not have a fault will be the pin pair being displayed. For
example, if there is a short on pair 1-2, pair 3-6 are measured in AUTO-
LENGTH and you'll see 3-6 displayed when you set the capacitance value.
When the cable does not match the pass criteria (e.g. UTP instead of
an expected STP), the detected condion is displayed and the expected
one blinks (e.g. UTP icon on, STP icon blinking). X-Over does not have an
alternate icon so it blinks if there is a mismatch between expected and
actual.
If no test remote or mapping ID is found, a single-ended test is
performed on the open cable. A single-ended test rst measures the
length of all 8 wires. If all wires are greater than 4 feet, a split-pair test is
performed. Also, the wire lengths are compared to test whether they are
all within 10% of each other. If these condions are met, the Check icon
is acvated and “ONE-End” is displayed.
Splits are idened by ashing the corresponding numeric icons (Split
and X-Over icons acvated). If no splits are found, but some wires
are less than 10% of the longest wire, “diFF LEN” is displayed and the
corresponding numeric icons are ashed.
• A 1-pair cable is declared if the 3-4 pairs are at least 3 feet long and
the 2-5 and 1-6 pairs are less than 2 feet.
• A 2-pair cable is declared if the 3-4 and 2-5 pairs are at least 3 feet
long and the 1-6 pair is less than 2 feet.
• A 3-pair cable is declared if all the pairs are at least 3 feet long. If
an unconvenonal conguraon of wire pairs is detected (e.g. 1-6
and 2-5), the expected pair icon blinks and the Mis-wire icon is
acvated. Current default pass criteria are 2-pair, reversed.
• A 4-pair cable is declared if all the pairs are at least 3 feet long. If
neither criterion is met, the number of pairs is le unknown.