How to detect and maintain mass flowmeter?

How to detect and maintain mass flowmeter? 

1. Zero point check (zero calibration) Zero point drift is a problem that flowmeters often encounter in actual operation: There are many factors that can cause zero point drift, such as sensor installation pressure, asymmetrical structure of the measuring tube, physical characteristics of the measured fluid occur changes etc. Especially in small flow measurement, zero drift will seriously affect the measurement accuracy. Therefore, it is very necessary to check and adjust the zero point regularly. Zero checks should be performed at least every three months. If production permits, for mass flow meters installed at important monitoring points, the time interval for zero point inspection should be appropriately shortened. Whether the zero calibration is completed is the key that directly affects whether the flowmeter operates within the accuracy range.

2. Check the working parameters During the use of the flowmeter, you should always pay attention to whether the set working parameters have been changed and the displayed flow, density and temperature values are normal. If there is a big difference with the actual situation, you can perform zero flow calibration again according to the method described in the manual. After completing the above work, if you still feel abnormal, you should check whether the working parameters set in the transmitter are correct.

3. Regularly observe the fault indication of the flowmeter According to the model, specification and manufacturer of the flowmeter, the display method and content of the fault are also different. For different fault alarm indications, you can check the product manual to determine the cause of the fault and deal with it.

4. Regular comprehensive inspection and maintenance For the flowmeter in use, regular comprehensive inspection should be carried out: from the appearance of the sensor, the firmness of the installation, the vibration of the process pipeline, the indication of the transmitter and the display instrument, etc., a comprehensive inspection should be carried out item by item , and solve problems in a timely manner.

5. Establish flowmeter documents To ensure the long-term reliable operation of the flowmeter, users should establish flowmeter documents, and record and install detailed records of each inspection, maintenance and verification. Enter the archives for better maintenance and use in the future.

6. Maintenance of flowmeters used for measuring fluids prone to scaling. When measuring fluids prone to scaling (such as scaling and waxing), the operation of the device should be checked frequently. When the flowmeter is found to be working abnormally or has a large deviation, the first Considering that there may be fouling in the sensor, the sensor should be removed and treated by appropriate methods such as purging or cleaning.

7. Regular calibration According to the different application occasions of the flowmeter, regular calibration should be carried out according to the requirements of the standard system. In order to maintain the high precision and stability of the flowmeter, it is necessary to inspect and maintain the mass flowmeter from time to time. Only when the flowmeter is in good condition can accurate measurement be obtained and the function of the mass flowmeter can be fully utilized.

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