F
fjr1300
Does anyone have a problem with their Fluke 156X testers when doing Loop Impedance Testing ?
Most of the earth systems I come across are TT and my meter will on the odd occasion show >2000 ohms and then on a repeated try I get the correct answer.
I think the problem gets worst when the L-N line impedance is high, say greater than 1 ohm but have seen it on L-N reading of 0.5 ohms
The other day was a real pain, the L-N was 3.2 ohms (don't ask - 2.5mm wire/ too long) and every other reading gave me >2000 or the correct 39 ohms
Found that doing a L-N reading first then the ZI next the meter behaved its self but try to do two ZI reading one after another just gave me >2000 ohms
Just thought I'd ask
Lee
Most of the earth systems I come across are TT and my meter will on the odd occasion show >2000 ohms and then on a repeated try I get the correct answer.
I think the problem gets worst when the L-N line impedance is high, say greater than 1 ohm but have seen it on L-N reading of 0.5 ohms
The other day was a real pain, the L-N was 3.2 ohms (don't ask - 2.5mm wire/ too long) and every other reading gave me >2000 or the correct 39 ohms
Found that doing a L-N reading first then the ZI next the meter behaved its self but try to do two ZI reading one after another just gave me >2000 ohms
Just thought I'd ask
Lee
