"Engine" Temperature Measurement.

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**mockingbird812** · #4 07-18-2007, 05:42 AM

Good info Mike. Thanks for taking the time. In practical terms how do I determine if my temp gauge is providing accurate information? I.e. what procedure can I use to measure my coolant temp with the IR thermometer?

Specs on my Mannix IRT2 are
Optical ratio 6:1
Resolution 1 degree
Emissivity 0.95
Accuracy +/- 3% or +/- 3deg. C

Instructions state that "Not recommended for measuring on shiny surfaces. The smaller the target, the closer the unit should be to it."

The sticker on the side of the thermometer has a diagram depicting the 6:1 Distance to Spot Size ratio. Is this spot the area of temperature measurement? I.e at 600mm or about 2 feet (from gun to measured surface) the area of measurement is 100mm or ~4 inches.

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