Improve the stability of the gas flowmeter and enhance the anti-interference ability

How to improve the stability of gas flowmeter? The temperature, pressure, instantaneous flow and cumulative flow can be displayed on site. The flow rate is zero and there is still a signal output; the cause of the fault: the external strong electromagnetic field interferes with the pipeline vibration, causing the impeller to swing back and forth. shock. Improve the stability of the gas flowmeter and enhance the anti-interference ability to keep the filter unblocked. The filter is blocked by impurities, which can be judged from the increase in the reading difference of the pressure gauge at the inlet and outlet, and the blockage should be removed in time, otherwise, the flow rate will be seriously reduced. The indicated traffic does not match the actual traffic. Cause of failure: The second cause of failure is the pre-amplifier bad air or steam mixed into the pipeline, the outlet pressure is too low, the bearing is worn, the impeller is attached to impurities, the dirt is poor, and the piping is poor, indicating that the instrument is faulty. For large-flow trade settlement measurement, in order to ensure the accuracy of the flowmeter, the gas flowmeter must be calibrated frequently. The site should be equipped with online calibration equipment or mobile calibration devices. Although the one-time investment is relatively large, it is worthwhile considering the long-term economic benefits. Before the turbine gas flowmeter is put into operation, the instrument coefficient must be set first, and carefully checked to ensure that the flowmeter is connected correctly and grounded before power transmission. Troubleshooting method: The precession vortex gas flowmeter adopts a built-in sensor, which has a compact structure, high safety and beautiful appearance. The installation and maintenance method of the precession vortex gas flowmeter: the precession vortex flowmeter adopts a new signal processing amplifier and advanced filtering technology, which effectively avoids the interference signal generated by the pressure fluctuation and pipeline vibration, greatly improves the anti-interference ability, and makes the Excellent stability for small flows. Remedy: Eliminate pipeline vibration, inspect the amplifier, install an air separator, increase the pressure, replace the bearing cleaning pipe, re-pipe, inspect and display the instrument. Improper installation and maintenance of the precession vortex flowmeter will not only affect the measurement accuracy, but also damage the instrument in severe cases: when moving the precession vortex flowmeter, the sling should be placed on the neck positions at both ends of the flange of the gas flowmeter, and the Do not insert pipe rods into the measuring pipe for hoisting, so as not to damage the lining, and at the same time, prevent the screw-in vortex flowmeter wiring socket from being damaged by collision. It must be ensured that the center of the precession vortex gas flowmeter is consistent with the center of the process pipeline, and the grounding wire must be connected, otherwise errors will be caused. The gas turbine flowmeter sensor or the supporting display instrument has no output signal; the cause of the fault: the wiring is wrong, the impeller is stuck and does not rotate, the detection coil is open circuit or short circuit, the preamplifier is bad, the preamplifier has no power supply or the power supply voltage is too low, and the instrument itself is faulty; Time The function of display and real-time data storage can ensure that the data will not be lost and can be saved. Regularly clean, check and recalibrate the gas flowmeter. For flow meters with lubricating oil or cleaning fluid injection ports, lubricating oil or cleaning fluid should be injected regularly according to the requirements of the manual to maintain the good operation of the impeller. Troubleshooting method: check whether the wiring is correct, check whether there is sundries in the pipeline, check the amplifier, check the amplifier, check the amplifier or increase the power supply voltage, check the display. The power consumption is extremely low, and the built-in battery can supply power for a long time. It is an ideal display instrument without external power supply. The monitoring shows the status of the instrument, and the evaluation shows the reading of the instrument. If there is any abnormality, it should be checked in time.

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