Since temperature affects the measuring accuracy of a pressure sensor, there always remains a little temperature error in the rated temperature range despite a variety of compensation measures. This error 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. The zero-point error describes the result of temperature on the zero signal. The error of the span specifies the result of temperature on the full scale value. The average person temperature coefficients of zero point and of span are usually specified as magnitudes, meaning that they could be either positive or negative.
If within diaphragm seal -point error gets the same sign as the error of the span, these two temperature errors may add up in worst case. An average value for the common zero-point temperature coefficient of a pressure sensor is: 0.2 % / 10 K. เพรสเชอร์เกจ to WIKA pressure sensors.
fittingthai.com & radiusglobal.co.th Shop power by Odoo ERP