Since temperature affects the measuring accuracy of a pressure sensor, there always remains a small temperature error in the rated temperature range despite an array of compensation measures. Sizzling is often 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 in most cases is room temperature.
Accordingly, Smug 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 only the zero-point temperature coefficient (abbr. TC0), but also that of the span (TCC) must be considered individually. The zero-point error describes the effect of temperature on the zero signal. The error of the span specifies the effect of temperature on the entire 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 in an individual instrument the zero-point error has the same sign as 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.