meters not accurate below 0.01 ohms

[Engineer54]

My megger meter went to 4dp,would have been fine for the job.
think it's a megger 286 from memory,were about £500 a few years back.

I think you may be right, and sounds like the unit we have used on past projects. But i can't remember the actual model number either!! lol!!

 

[Engineer54]

I'm not seeing much of a point in using a Ductor tester to measure Ze to be honest, you would need much more information than the values measured with this device. You'd need some very long test leads too in most circumstances, and a fair bit of calculation if you do happen to be in possession of all the other relevant information!!

I use these testers to determine contact resistances of say Switchboard buss bar joints, contact resistances of ACB/GCB and larger MCCB breakers etc, and basically anything that has a sizable and/or critical site made joint/connection and the like!! Like Tony, i wouldn't be without a decent Ductor test kit during testing/commissioning sub-stations and the like!!

 

[Knobhead]

I had an electricians mate, his job was to run out the 70mm test leads.

 

[jams88]

A ductor tester might be much more accurate for measuring lower resistance ..

 

[Knobhead]

Please stop digging up old topics.