James Waldby wrote:
On Mon, 23 Nov 2009 17:40:36 -0800, Michael Koblic wrote:

I have three sets of cheap digital calipers bought in Canadian Tire. The
have all been working fine and agree with a micrometer to within 0.001".
Two weeks ago I tried to use the one I keep in the workshop to measure
something of the order of 4" when the calipers refused to measure
anything past 1.5". I brought them into the house where they started
working fine as soon as they warmed up.

http://www.biotele.com/digital_caliper.htm

Sounds like condensation is messing up the dielectric constant
in the sensor gap. It'd be interesting to put the calipers in
a bell jar and pump them down to boil off the liquid at 9.5 C.

If they suddenly start working, you have a data point.

--Winston

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