Use and maintenance of solid flowmeter

1. The use of the flowmeter The flowmeter can be put into use after being checked and adjusted. In order to make the flowmeter work normally, the following points should also be paid attention to when using it. The measurement accuracy of the flowmeter, let alone push it in use. ② Although the flow section of the flowmeter has a certain margin, it should also avoid the entry of large-grained materials or materials exceeding the range to prevent channel blockage. If it is blocked, it should be cleaned with appropriate tools, and the flowmeter must not be damaged by hitting it with a hammer. ③ Regularly clean the dust around the test board and the movable main beam to prevent the accumulation from jamming the main beam and affecting the measurement accuracy. ④ Prevent the airflow from entering the flowmeter with the material and cause measurement errors. 2. Maintenance and inspection of the solid flowmeter ① Regularly check the dynamic zero point of the flowmeter (note: the flowmeter has been dynamically adjusted, and the output signal may not be 'zero' at this time). If there is a change, the flow meter should be further checked and necessary adjustments should be made. ② Make a full-scale test on the static state of the flowmeter every three months. ③Comprehensively inspect and adjust the flowmeter every other year. ④Flowmeter may fail. See the table below for the causes and troubleshooting methods. Troubleshooting method: No output signal, power supply not connected, output signal terminal open circuit or reversed connector Poor contact The signal converter is damaged. Turn on the power and correct it. Find out the bad contact point and repair it. Replace the output signal of the signal converter. If it suddenly disappears or increases suddenly, the inlet and outlet may be blocked from the above reasons. Clean the inlet and outlet. Fluid path variation is too large Loose mechanical parts produce friction or collision deformation, abnormal displacement enters sundries, causing changes Strong vibration or loose feet Find damaged machinery, repair and clean sundries to remove vibration source, fasten bolts 3. The debugging method of changing the signal converter ①Remove the original signal converter and replace it with a new one; ②After checking that the wiring is correct, turn on the power, and hang a weight of 50% of the full scale of the instrument on the static calibration mechanism. When the output signal is 5 mA, if the deviation is too large, adjust the position of the differential iron core (call out or in) until the output is 5 to 0.2 mA (tighten the iron core nut); ③ After the above adjustment, press the static Method to adjust the flow meter.

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