Re: Measuring the resistance of a hot resistor

On Mon, 26 Feb 2007 00:06:51 -0800, MassiveProng
<MassiveProng@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

On Mon, 26 Feb 2007 04:40:17 GMT, Ross Herbert
<rherber1@xxxxxxxxxxxxxx> Gave us:

On Sun, 25 Feb 2007 19:24:21 -0800, "Jon Danniken"
<jonREMOVETHISdanniken@xxxxxxxxx> wrote:

"me" wrote:
Use a DC circuit to indirectly measure the reistance as described
(roughly)
above.

Excellent, thanks for that, Me. I'll cook up a little DC circuit
to
toss it
into for the measurement.

Thanks,

Jon


You could also do a direct measurement with the resistor heated by a
hot plate or a hot air gun...


Do you not think that a known voltage and a good current reading
would not be more accurate than an unknown calibration level ohm
meter?

I am fully aware of the method of performing a DC current and voltage
measurement and applying Ohm's Law. I was simply suggesting an
alternative which would avoid the need to lash up a circuit which
requires both an ammeter and a voltmeter simultaneously in circuit in
order to achieve best accuracy. Two measurements with meters each
having accuracy and tolerance inaccuracy will also magnify any
calculation error.

A single meter measuring resistance directly might be more accurate
depending on the meter used.
.

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