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There is water in the pipe, but it shows zero? a. Whether the installation is correct. b. Flow direction during installation. c. Interference. d. Pipes. (Non-metallic parts lack grounding rings.) e. There is a problem with the wiring to the computer. f. Low flow rate. g. The electrical conductivity of the medium. k. Reasons for backup pipes or pipe branches. Solution: Flow direction (facing the terminal block, flowing from left to right) ； If the installed pipeline is a non-metallic one, a grounding ring must be added. For low flow rates ； Increase the flow rate; if it’s not possible to increase the actual flow rate ； It is best to use a flow meter with an aperture that is slightly smaller than that of the actual pipe; this allows for the use of a reduction technique to increase the flow rate ； The conductivity of the medium must be at least 20 μs/cm; Is the digital display on the LCD showing an out-of-range value? a. The dialing values are incorrect. b. The actual data traffic is high. c. The converter is damaged. Solution: Check the records from the time of manufacture to restore the original dialing values ； Replace the flow meter. Does the LCD digital display show a continuously decreasing value? a. Decreased insulation performance b. An issue with one of the integrated circuits in the converter. Solution: The coils inside the housing are not properly sealed, allowing water to enter and reducing their insulation properties. Is the on-site reading showing fluctuations, and are those fluctuations significant? a. Installation location (the highest point of the pipeline). b. Is there any interference in the surroundings? (Inverter: ensure that the power supply for the inverter and the flow meter is not the same.) ； Large motors, crossed or overlapping; mobile phone towers do not cause interference with flow meters. c. Unfilled pipes. d. The non-metallic pipe is not grounded. e. Broken wire. f. Power-frequency interference H. Influence of the microcomputer. Solution: 1. If it is installed at the highest point, an exhaust valve can be placed at the inlet end to release the gas ； 2. Separate the power supply and use a different one. 3. If it is a non-metallic pipe, a grounding ring must be installed to ensure proper contact between the medium and the casing