Of course "Kelvin probes" are the right answer, but all this means is going back
to basics, and you can do this more cheaply with equipment you may already have.
Since you ask about a "Bonding Meter" I presume your device will stand an amp
or ten of current. So set up a constant current dc source through your bond, of
say 1 amp, and use a DVM to measure the millivolts across the bond. Millivolts
read = milliohms of resistance for a current of 1 amp. With10 amps you get ten
times the sensitivity of course.
This is automatically a four terminal (Kelvin) measurement and so resistance in
any of the leads has no effect on the measurement.
Sorry if this is too obvious - but sometimes we all forget the KISS solution!
Roger
Derek Walton <[email protected]> on 24/09/99 16:44:36
Please respond to Derek Walton <[email protected]>
To: IEEE EMC Discussion Group <[email protected]>
cc: (bcc: Roger Viles/PLY/Global)
Subject: Bonding Meter
Hi folks,
can anyone recommend a meter for making resistance measurements as low
as 1 milliohm?
Thanks,
Derek.
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