Date: Thu, 18 Nov 2004 17:22:14 -0800 From: Bob Miller <[EMAIL PROTECTED]> To: [EMAIL PROTECTED], [EMAIL PROTECTED] Subject: [Eug-lug] Borrow a Pyrometer?
Does anyone here have an infrared pyrometer? I would like to borrow one for a couple of days to do some computer cooling experiments.
I've seen handheld units for under $100, but don't own one.
What I'm thinking is that I can put an object, maybe a piece of cardboard, in the case fan airflow and measure its temperature with the pyrometer as a proxy for case air temperature. Does anyone know why that wouldn't work?
It *may* work, but to trust your data you would have to calibrate your method first with a real *thermometer* (electronic or conventional), under the conditions the study is done. The emitted amount/spectrum of IR and the temperature of the material that emits it are correlated but not always in a trivial way; greybody vs. blackbody being one issue, other materials in the optical path being another -- how would you point that 'T-gun' into the closed box (closed, to have realistic air flow/pressure conditions)
You may have a voltmeter that can be equipped with some temperature sensor. Maybe Norvac has a couple of such cheap sensors; you can place those at different positions in your box, feed the cables out, and connect them, one at a time, to your voltmeter. That way you could obtain a 3D temperature image from the box' interior.
I did such studies in the 90s, testing LCD panels illuminated by 1000-2000 Watt Me-Halide lamps. Unfortunately, I don't have access to that equipment any more )-:
- Horst
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