Or, for a totally different approach to calibration, how about an infrared thermometer.  Just point it at the thermostat housing and read the temp on the LCD readout.  Couldn't be any easier than that. 
See http://www.jcwhitney.com/autoparts/ProductDisplay/s-10101/storeId-10101/p-7565/c-10101/catalogId-10101/TID-190003866GN1004


At 01:44 PM 10/7/2004 -0700, you wrote:

Or how about another approach entirely.   An additional temp sensor, tapped in at a reasonable place and entirely seperate from the aircrafts electrical system.
Tom
John Slade <sladerj@bellsouth.net> wrote:

Steve,

If you want to test the sensor in place, how about running the engine with

the pressure cap off till it boils. Wouldn't that give you 212F (briefly)?

John (W&B much improved. Engine in trunk of car)

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