nuckolls.bob(at)aeroelect
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 Posted: Fri Feb 11, 2011 6:48 pm Post subject: Low Ohms Adapter Status |
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I've just finished the proof of concept article
for an AEC9008-1 Low Ohms Adapter. The pictures
are here:
http://tinyurl.com/4f5j3cu
The photos include two live tests. In one photo,
the companion VOM (not supplied) is shown on the 2V
setting. This translates to a 19.99 ohms full scale
display on the VOM. I've fitted a 3.9 ohm resistor
into the clips which produces a reading of "396" or 3.96 ohms.
The other photo shows the clips connected together
and the VOM on the 200 mV scale for a resistance reading
of 1.999 ohms full scale. We can see that the almost-
but-not-quite 4-wire measurement has a residual resistance
reading on the order of 3 millohms.
When using the instrument on the 20 ohm scale, the 3 milliohm
error is insignificant. on the 2 ohm scale, one might improve
on the reading my subtracting 3 milliohms from the displayed
reading.
I've made some tooling for getting the holes drilled
quickly. I've worked out some other pesky packaging
issues. The production batch should go pretty smoothly
now.
Bob . . . [quote][b]
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