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Thermocouple testing

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nuckolls.bob(at)aeroelect
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Posted: Tue Oct 16, 2012 9:07 am Post subject: Thermocouple testing

At 10:13 AM 10/16/2012, you wrote:

  	  Quote: 	
		  Bob,

 

 I ordered 3 of the devices.  When comparing them at room temp they varied over a range of about 3 deg.  Any info on what screw does what, or shall I just start twisting screws and see what happens  ?  I'm not as concerned with accuracy as I am with consistency across them for measuring temp differences. 	


   I've not explored the functionality of the two pots.

   One will be offset (probably calibrated at the lower

   temperature) and the other is scale factor (higher

   calibration point). 



   You'll need a water-ice bath of distilled or RO

   water and crushed ice. Also a boiling cup of

   water . . . 



   Put dip into alternate baths, wait for stable

   reading and then adjust pot for either 0 or

   100 as appropriate. Each excursion/calibration

   cycle between the two baths should display

   smaller errors. If the errors are growing,

   try reversing which pot is twisted for what

   temperature. 



   Let us know what you discover!



 

 

   Bob . . .    [quote][b]

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