In the process of using 4-wire pressure sensors, in order to ensure the performance and accuracy of the sensor, it is necessary to distinguish between good and bad sensors. Here are some ways to tell the difference between a good and bad 4-wire pressure sensor:
1.Detect the supply voltage.
After supplying power to the sensor, it is necessary to check whether its supply voltage is normal. Under normal circumstances, the supply voltage of the sensor should be within the specified range, such as the common 12V or 24V. If the supply voltage is too high or too low, it can cause the sensor to not function properly or to cause measurement errors.
2.Observe the output signal.
When the sensor is working normally, its output signal should have a certain stability and linearity. A device such as an oscilloscope or data collector can be used to see if the output signal of the sensor meets the requirements. If the output signal fluctuates greatly or the linearity is not good, the measurement accuracy and stability of the sensor may be affected.
3.Check the zero and full scale of the sensor.
Before measuring, it is necessary to check whether the zero point and full scale range of the sensor are normal. If the zero deviation is too large or the full-scale range is too small, the sensor may not be able to meet the actual measurement needs. In this case, the zero and full-scale ranges of the sensor need to be adjusted or replaced.
4.Check the connection cables.
The connecting cable of the 4-wire pressure sensor is essential for its proper functioning. Therefore, it is necessary to check whether the cable is intact, whether the connection is secure, whether the insulation is aged, etc. If you find a problem with the cable, you should replace or repair it in time.
5.Calibration and calibration.
In order to ensure the measurement precision and accuracy of the sensor, it needs to be calibrated and calibrated. During calibration and calibration, the output signals of the sensors are tested and compared using standard pressure sources or other related equipment. If an error or deviation is found in the sensor, it needs to be adjusted or replaced.