Patent ID: 8689635

Claim:
An automatic operation method for obtaining temperature compensation coefficients of digital pressure gauges comprising the steps of: A: mounting the pressure gauges with a micro-controller unit (MCU), programmed with a built-in calibration procedure, into a chamber in which the temperature and pressure are controllable; B: executing the temperature compensation calibration procedure and detecting whether temperature 1 is reached; C: recording an actual temperature value T i 1 and a pressure value P so 1 of the pressure gauges when temperature 1 is reached, and then calculating a pressure difference Span1 while being pressured; D: changing the temperature of the chamber and detecting whether the pressure gauge reaches temperature 2 after the temperature change of the chamber; E: when temperature 2 is reached, recording an actual temperature value T i 2 and a pressure value P so 2 of the pressure gauge, and then calculating a pressure difference Span2 while being pressured; F: calculating the temperature coefficients of the pressure gauge T CO and T CS ; G: alternatively sending an alarm signal or storing the temperature compensation coefficients into a memory of the pressure gauges based on the calculated values thereof.