How to calibrate the zero point of a pressure transmitter?

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Pressure transmitter is a commonly used industrial measuring instrument and plays an important role in various process control systems. Zero point calibration is an important step before using the pressure transmitter, which can ensure the accuracy and reliability of the measurement results.

The following is a common method for zero calibration of a pressure transmitter:

1. Preparation

Before performing zero calibration, you first need to check the pressure Whether the connection of the transmitter is safe and tight. After confirming that there are no leaks, proceed to the next step.

2. Turn off the input signal

Turn off the input signal source (such as fluid or gas) and let the pressure transmitter be at rest.

3. Adjust the zero calibration knob

Find the zero calibration knob on the pressure transmitter, and adjust the knob counterclockwise or clockwise so that the indicator pointer of the pressure transmitter Back to zero.

4. Turn on the input signal

Turn on the input signal source, gradually increase the pressure, and observe whether the indicator of the pressure transmitter is displaying correctly and matches the actual value.

5. Verify measurement results

Use other reliable pressure measuring instruments to verify whether the measurement results of the pressure transmitter are accurate and reliable. If deviations exist, further adjustments and calibrations can be made.

It should be noted that when performing zero calibration, external interference and vibration should be avoided and the instrument should be kept in a stable state. In addition, depending on the specific pressure transmitter model and manufacturer's requirements, the steps and methods for zero calibration may be different. Before performing zero point calibration, it is recommended to read carefully and follow the relevant operation manual or instructions.

Through the above operation steps, the zero calibration of the pressure transmitter can be effectively completed, ensuring its normal operation and accurate measurement, and improving the stability and reliability of the process control system.