Troubleshooting of Mass Flow Meter

The mass flowmeter is based on the Coriolis force. There are two parallel T-shaped vibrating tubes inside the sensor. The driving coil is installed in the middle and the pickup coil is installed at both ends. The mass flowmeter directly measures the mass flow rate of the medium passing through the flowmeter. , can also measure the density of the medium and indirectly measure the temperature of the medium. Mass flowmeter is an important flow measuring instrument. The mass flow meter is measured by heat sensitivity. Then this article mainly introduces the solution to the mass flowmeter troubleshooting. Under normal circumstances, the mass flowmeter will not fail, and it doesn’t matter if it fails. Careful analysis of the cause can solve the problem, such as whether the working condition has changed, whether it has passed the gas, whether it has just been calibrated and used, etc. etc., the following briefly introduces several kinds of faults and their solutions: Troubleshooting of mass flowmeter——If there is a large error in the hardware failure, the display of the totalizer is not bright or does not add value, and the display is blank, the reasons are: a. The installation is not standardized, which can directly lead to the zero drift of the flowmeter, such as the mass flowmeter is installed at the outlet of the pump Recently, the support strength of the sensor is not enough, the improper welding of the connecting flange produces a stress signal, and the cable is subject to electromagnetic interference. b. Wiring problem If the display does not light up, check the power supply connection of the calculator. If the fuse is burned, check whether the input voltage is consistent with the nominal value of the standard voltage and whether the AC or DC form is consistent. And if the totalizer does not increase with the flow rate, check the wiring of the totalizer. If the totalizer is equipped with a forward/reverse program, check the wiring of the flowmeter. Does not increment when flowing. c. Changes in the process medium If the measurement medium has gas inclusions, gasification or two-phase flow, the transmitter will display an alarm, and if it is serious, the sensor will stop working. d. Transmitter failure. e. Sensor failure. f. Pipeline purging problem. Software Problems Mass Flow Meter Troubleshooting——Before installing and using the flowmeter that has just been calibrated, you must pay attention to the zero point calibration under the current working condition. You must ensure that the flowmeter is filled with medium and then close the stop valves at both ends to calibrate the zero point. There are many specific methods, panel operation , handheld devices, etc. a. The zero calibration is wrong. b. The parameter setting is wrong. c. Pulse fluctuation of power supply. d.i/o configuration is wrong (be sure to pay attention to the range).

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