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Re: A Simple Lab Demo of Resistor Noise EMF.



At 12:27 3/20/01 -0500, Clarence B. wrote:
I have an old meter called Thermocouple Milliammeter.

It is not for temp reading, but the input current raises the temperature of
the input resistor, whose temperature is sensed by a thermocouple driving
the D'Arsenval meter movement.

Would you call this a real True RMS meter?

Clarence P. Bennett

There was another instrument in the same general class:
the hot wire ammeter relied on the sag caused by current
through a fine wire to provide a pointer deflection.
It was indifferent to the current direction.


brian whatcott <inet@intellisys.net> Altus OK
Eureka!