This design introduced a high-precision on-spot digital thermometer. It use PT1000 thermal resistance as the temperature sensor, and it use the classical three lines system. In the range of-100℃～300℃ the measure precision can be 0.02 .And it designed a low power consumption of sampling control power and the display circuits. With a 2AH/3.6V AA Li-battery it can be used for three years. And this design can be digital calibration to facility the user to calibrate himself.

DESIGNOFHIGH-PRECISIONON-SPO.doc

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