User manual SEFELEC 5x Series 67 v1.06
SELECTION OF THE MEGOHM PER KILOMETRE MODE
The device proposes to indicate values of resistance of cables expressed in insulation per kilo-
metre, as this formulation is the one generally used in manufacturers’ specifications or stand-
ards. The cables can be comprised of several independent conductors connected in parallel for
the measurement; the device recalculates the value for 1 conductor.
The insulation value displayed is the result of the following calculation:
R.displayed = (R.measured x Length in metres x no. of conductors) / 1,000
Press the active area of the "Megohm.km" line to activate and setup this mode:
Enable or disable the Megohm x km mode by selecting ON or OFF.
Then enter the length of the cables in metres and the number of cables in parallel.
For example:
A cable 100 metres long with 5 conductors in parallel gives a value of insulation of 500 MΩ in
normal mode.
If we activate the Megohms per kilometre function, we obtain a displayed value of:
R.displayed = (500 MΩ x 100 m x 5) / 1,000 = 2,500 MΩ.km = 2.5 GΩ.km
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