Since temperature affects the measuring accuracy of a pressure sensor, there always remains a little temperature error in the rated temperature range despite a wide range of compensation measures. Faux Pas is frequently expressed in the info sheets of manufacturers of pressure sensors as temperature coefficient (abbr. TC). This coefficient describes a (linear) error, beginning with a reference point, which generally is room temperature.
Accordingly, the temperature error at room temperature is zero and increases with increasing difference of the temperature from room temperature with the specified coefficient in linear fashion (see figure). Basically, not merely the zero-point temperature coefficient (abbr. TC0), but also that of the span (TCC) must be taken into account individually. Secret Plot -point error describes the effect of temperature on the zero signal. The error of the span specifies the effect of temperature on the full scale value. The average person temperature coefficients of zero point and of span are usually specified as magnitudes, and therefore they may be either positive or negative.
If within an individual instrument the zero-point error has the same sign because the error of the span, these two temperature errors may accumulate in worst case. An average value for the common zero-point temperature coefficient of a pressure sensor is: 0.2 % / 10 K. Connect to WIKA pressure sensors.