Pressure sensor detection method

Pressure sensor detection, according to different purposes, the test project is different also, of course, testing methods also have difference.

1, pressure test, check list method is: to power a sensor, the blowing pressure sensor guide hole, with the mouth with a multimeter voltage detection sensor output voltage changes. If the relative sensitivity of pressure sensor is very big, the variation will be obvious. If no change, you need to switch to pressure on the pressure source.

2, zero point of the test, the voltage, the multimeter test conditions, there is no pressure on the sensor's zero output. The voltage output for mV level commonly, if beyond technical indexes of the sensor, sensor's zero deviation beyond.

3, bridge road detection, the main detection sensor circuit is correct, the general is a wheatstone bridge circuit, using the multimeter ohms range, quantity between the input impedance and output impedance between the two impedance is the input and output impedance of pressure sensor. If the impedance is infinity, bridge road is broken, that there is something wrong with the sensor or pin definition is not right.

by the above methods, basic can detect a sensor. If need accurate detection, you need to use the standard pressure source, pressure sensor, according to the change of pressure and the size of the output signal, the sensor calibration. And in situations where conditions permit, the detection of the temperature of the relevant parameters.