[Amps] What blower?

[Ken KW0A]

Don't forget any substance on glass may concentrate the heat and render the reading inaccurate.

-----Original Message-----
>From: Steve Thompson <g8gsq at eltac.co.uk>
>Sent: Jan 29, 2006 6:03 PM
>To: amps at contesting.com
>Subject: Re: [Amps] What blower?
>
>
>
>Gary Schafer wrote:
>> I wonder if those IR thermometers won't give a false reading of glass
>> temperatures because of also picking up the direct radiated IR from the
>> tubes plate as it is operating.
>A lot of the IR thermometers have a fixed emissivity setting which is 
>wrong for glass (and maybe shiny metal). The simple fix is a patch of 
>correction fluid like Tippex or Snopaque (?), which has pretty close to 
>the right value. I imagine it might attenuate the direct IR as well.
>
>Steve
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K. Kreski M.D.,A.B.I.M.
KW0A  (EM48wx)
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