Pressure thermocouple sensor detection method

Pressure thermocouple 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 thermocouple sensor, the guide hole mouth blowing pressure thermocouple sensor with a multimeter voltage detecting thermocouple sensor output voltage changes. If the pressure of the thermocouple sensor sensitivity is relatively large, the change will obviously. If no change, you need to switch to pressure on the pressure source.

2, zero point of the test, the voltage, the multimeter test under the condition of no pressure, thermocouple sensor's zero output. This output is commonly mV level voltage, if beyond the technical indexes of thermocouple sensor, thermocouple sensor's zero deviation beyond.

3, bridge road test, the main detection circuit of thermocouple sensor 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 pressure of the thermocouple sensor input and output impedance. If the impedance is infinity, bridge road is broken, explain thermocouple sensor has a problem or pin definition is not right.

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