[R-390] Re: IERC tube shields and tube temps...a field expedient...

[Jim Shorney]

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On Mon, 21 Apr 2003 19:18:58 -0400, Darryl Jones wrote:

>Does anyone have a suggestion of how I can measure tube temps
>accurately?


Brew up a wheatstone bridge circuit with a forward-biased silicon diode
in one leg as the sensing element.  Connect it to your DVM and feed it
a regulated DC supply voltage, calibrate it to 100C in a pan of boiling
water and 0C in a cup of ice water.  Quick, dirty, cheap, and
surprisingly accurate.
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