Sewage flowmeter during the use of common faults and solutions
Jiangsu Anderson flow meter professional sewage flow meter manufacturers
First, 1. Sewage flowmeter failure phenomenon: fluid does not flow, flow display is not zero, or the display value is unstable
2. Probable causes a. The transmission line shield is poorly grounded. The external interference signal is mixed into the display's input b. The pipe is vibrating. The impeller will fluctuate, causing an erroneous signal c. The shutoff valve is not closed due to leaks. Actually, the instrument displays the leak amount d. Deterioration or damage between circuit boards or electronic components, resulting in interference
3. Sewage flow meter solution a Check shielding layer, display terminal is well grounded b Reinforce the pipeline, or install brackets before and after the sensor to prevent vibration c Check or replace valve d Take “short-circuit method†or check one by one to determine interference Source, find the point of failure.
II. 1. Sewage flow meter failure Phenomenon: The flow rate is not reduced, but the flow rate is gradually decreased. 2. Probable causes a. Whether the sewage flow meter filter is clogged or not, if the filter pressure difference increases, it indicates that the debris has been blocked b. The spool on the flow sensor tube segment appears to loosen the valve core, and the valve opening automatically decreases. c The flowmeter sensor impeller is obstructed by debris or the bearing gap enters foreign objects. The resistance increases and the deceleration slows down. 3. Solution: a Eliminates the filter b from the valve Check whether the handwheel adjusts the effective judgment. After confirmation, repair or replace c. Remove the sensor and clear it. If necessary, check again.
Three, 1. Sewage flowmeter failure phenomenon: no flow when the fluid is flowing normally, the total counter word does not increase
2. Probable causes a Check the sewage flow meter power line, fuse, function selection switch and signal line for any open circuit or poor contact b Check the internal flow of the sewage meter display instrument, contact parts, etc. with or without poor contact c Check the sewage flow meter detection Coil d inspects the internal fault of the sewage flowmeter sensor. The above-mentioned 1-3 inspections are all confirmed to be normal or the fault has been eliminated. However, the fault phenomenon still exists. This indicates that the fault is inside the sensor flow channel and it can be checked whether the impeller touches the inner wall of the sensor or not. Live, shaft and bearing have no debris stuck or broken phenomenon
3. Sewage flow meter solution: a Use ohmmeter to troubleshoot points b. Printed board failure inspection can replace "backup version" method, replace the fault board and make detailed inspection. c Make the position of the detection coil on the sensor body. Unscrew the test head and use the iron piece to move quickly under the test head. If the number of counter words does not increase, check whether the coil is broken and the solder joints are detached to remove foreign matter, and clean or replace the damaged parts. After restoration, air blow or When the hand is toggle the impeller, there should be no friction noise. Replace the bearing and other parts and recalibrate it to obtain a new meter factor.
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