Why Calibrate Pressure Sensor?

A pressure sensor is a device or instrument which is able to measure the pressure in gases or liquids. A pressure sensor consists of a pressure-sensitive element which can determine the pressure being applied and components to convert the information into an output signal.

Before using pressure sensors for measurement work, we need to perform detailed calibration work on them, because if we do not calibrate them before use, various faults or inaccurate measurement results may occur during the measurement process.

The need for pressure sensor calibration

The fieldbus system of pressure sensor changes the previous point-to-point signal transmission to multi-point single-wire digital transmission, which greatly reduces the error of the system loop. And while improving system measurement and control accuracy, it also makes system configuration and commissioning more convenient.

Fieldbus pressure sensors are generally composed of high-precision sensors, programmable amplifiers, AD conversion circuits, CPU microprocessors, modulation and demodulation chips and external interfaces. Regardless of how it is used, a high-precision numerical transfer of process variables is required, and a high-precision pressure calibrator is needed for comparison.
Since the fieldbus loop is a complete digital signal loop, the output signals in the loop can be monitored and adjusted by the host computer. Since there is no analog signal transmission, the calibration of the pressure transducer becomes a calibration of the individual process variable values.

Common faults in pressure sensor

• Transmitter does not change:
  First check if the pressure interface is leaking or blocked, then check the wiring method and check the power supply and perform a simple pressurization to see if the output changes to determine if the power supply is normal Other parts of the problem system.
• Unstable transmitter output signal:
  This problem may be a problem with the pressure source. The pressure source itself is unstable pressure. It is likely that the surface or pressure sensor is not very resistant to interference, the sensor itself oscillates very strongly, and the sensor is malfunctioning.