Calibration steps for the gas gauge:
    1. Preparation
    Before the calibration of the gas meter, the relevant equipment and materials need to be prepared. This includes calibration gas sources, calibration gases, calibration devices, calibration standards and record forms. Ensure that all equipment and materials are in good condition and are stored and maintained according to manufacturer's requirements.
    2. Check before calibration
    An external inspection of the gas gauge is necessary before calibration. Check the appearance of the instrument for damage or contamination, and ensure that the connection lines are properly connected. If any problem is found, it should be repaired or replaced in time.
    Three, zero calibration
    Zero calibration of a gas gauge is the process of ensuring that the instrument reads zero when there is no flow input. Connect the calibration air source to the instrument according to the instrument's instructions and adjust the flow to zero. Wait some time for the instrument to stabilize and record the reading.
    Four, range calibration
    Range calibration is to ensure accurate readings of the gas gauge over different flow ranges. Connect the calibration air source to the instrument according to the instrument's instructions and gradually adjust the flow rate to a different known value. Each value is held for a period of time to stabilize the instrument and record the reading.
    5. Calibration curve drawing
    According to the data of zero calibration and range calibration, the calibration curve of the gas momentum meter can be drawn. The zero reading and the readings corresponding to different flow values are plotted on the coordinate graph, and the curve fitting is carried out. Calibration curves can help make more accurate measurements of the instrument.
    6. Evaluation of calibration results
    After the calibration is complete, the calibration results need to be evaluated. The calibrated instrument readings are compared with known standards to calculate errors and determine whether they are within acceptable limits. If the error exceeds the specified tolerance range, further adjustments or repairs may be required.

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