On 10/31/2011 2:16 PM, Luke S. Crawford wrote:
Hey, so I have a contactless "thermopen" infared thermomiter I got from woot.
Figured it'd be neat to see the temperatures of things like hard drives
and heat sinks during burn in (sometimes, especially for the hard drives,
the SMART reported temperature is... unlikely. I'd like a double check.)
Anyhow, the interesting bit is that if I measure the shiny part of
my burning-in hard drive (that was getting pretty hot to the touch; it was
in a cradle without forced air cooling) it claimed 95F, but if I measure
the label? it says 120F (which is more reasonable, considering that it
was slightly painful to touch)
Reading up, apparently the pen reports different temperatures for different
reflective values of the surface, and it's calibrated to 'flat black'
The problem is that most of what I want to measure (drives and heat sinks)
are reflective.
What do other people use for temperature probes?
Indeed, black would be the most accurate reading because of its
radiating properties.
Other than geeky value, is there a concrete goal?
I'm mostly interested in inlet temp and outlet temperature, and let the
internals handle themselves.
Aside: Interesting recommendation from James Hamilton (Amazon
Infrastructure lead) is to run the inlet around 87F, if your other
infrastructure can handle it.
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