Thermal measuring and testing – Thermal calibration system
Patent
1997-04-09
1999-12-28
Gibson, Randy W.
Thermal measuring and testing
Thermal calibration system
G01K 1500
Patent
active
060072393
ABSTRACT:
Calibration apparatus or comparators for testing temperature-sensing probes at elevated and reduced temperatures reduce or neutralize heat transfer along the extent of the heat sensor to obtain more rapid and accurate test results. A single cylindrical temperature controlled oven is formed in a metal block into which is inserted the probe to be tested. The oven is of sufficient diameter to receive probes having a wide range of cross-sectional configurations, and is not limited to probes having straight cylindrical shapes. To neutralize heat flow along the stem of the probe, a pair of actively cooled or heated adjustable jaws are secured to the metal block and positioned to grip the outboard stem of the probe. When the temperature of the jaws and the temperature of the probe are equal, the temperature sensed by the probe is compared to the known temperature of the oven. The difference between the two temperatures determined whether the temperature-sensing probe is functioning properly.
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