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Active and passive temperature compensation of pressure sensors

How does a dynamic or passive temperature compensation of pressure transmitters really work? High-quality pressure transmitters, especially those used in precision critical applications, are nearly always provided with a person temperature compensation. But what is actually the difference between a dynamic and a passive temperature compensation of the sensors?
Passive temperature compensation: Parts of the characteristic accuracy curve of the pressure sensor are measured at different temperatures during the manufacturing process. Then, the previously determined temperature errors are compensated by passive elements (resistors) within the electronics of the sensor or by corrections of specifically designed resistance structures directly on the sensor element itself (e.g. by laser-trimming). The (passive) resistor elements used have an almost linear temperature behavior, it is, however, only possible to compensate 1st order errors. Temperature errors of higher order, i.e. strong bending of the characteristic curve under temperature, can’t be compensated.
pressure gauge 10 bar : Here too, the characteristic curve of the pressure transmitters is measured at different temperatures during the manufacturing process. However, เพรสเชอร์เกจ comes with an additional integrated temperature sensor which constantly measures the temperature of the sensor and transfers it to the pressure transmitter?s signal processing. Used, two ways of active temperature compensation are normal: the initial method compensates by means of a limited number of samples, , i.e. discrete correction values, between which interpolation occurs.
The next method uses the electronics of the transmitter and a higher-order equation resulting from the regression of the acquired measurement values as a way to compensate then your expected error. During operation, this signal processing can help you automatically, i.e. ?actively?, compensate the pressure transmitter ?s temperature error using the calculated correction factors within a specified temperature range (e.g. 10-60�C). The most commonly used solution to minimize temperature errors of pressure sensors is a passive temperature compensation. This is the traditional method that is widely used.
However, active temperature compensation may be the top quality of possible compensation methods. WIKA has constantly improved and refined เพรสเชอร์เกจ in recent years. The pressure transmitters of WIKA using active temperature compensation therefore feature a temperature error that is almost zero within their specified temperature range.