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Loop resistance test
Use resistance test function can determine the length of cable.
Conversely, if you know the length of the cable, the resistance
test result will show whether the cable connection is good or
not.
Calculation formula: L=R
L
/R
O
（
Km
）
---------------------------
①
①
: RL is resistance measurements result (Ω), RO is the
resistance (Ω) per kilometer.
General specifications for the 0.32 mm copper RO = 435.2 Ω
specifications for the 0.4 mm copper RO = 278.5 Ω
specifications for the 0.5 mm copper RO = 178.3 Ω
If the course of testing equipment tips “out of range” which
shows test nips not connected or cable not looped or out of
resistance range, please check the test nips or retest after
loop the cable again. In the test, if there is in voltage (voltage
more than 2V) in the line, then there will be a prompt “voltage”.
It means this line have electricity and cannot test the
resistance. Please check the lines and test after cutting the
electricity. Please see picture for loop resistance calculation
interface:
