Serial number Fault phenomenon cause of issue Approach 1 Output signal when there is no flow after power-on Input shielding or poor grounding, introducing electromagnetic interference Improve shielding and grounding, and eliminate electromagnetic interference The instrument is close to strong electrical equipment or high frequency pulse interference source Keep away from interference sources and take isolation measures to enhance power supply filtering The pipeline has strong vibration Take vibration reduction measures to enhance signal filtering and reduce amplifier sensitivity Converter sensitivity is too high Reduce sensitivity and increase trigger level 2 No output signal after power-on Power failure Check power and ground Input signal line disconnection Check signal lines and terminals A certain level of amplifier is faulty Check the working point, check the components Detecting original damage Check sensor components and leads No flow or too small flow Check valve to increase flow or reduce pipe diameter The pipe is blocked or the sensor is stuck Check the cleaning pipe and clean the sensor Vortex body scaling Cleaning vortex generator 3 Output signal is not stable Strong electrical interference signal Strengthen shielding and grounding Sensor is contaminated or damp, sensitivity is reduced Clean or replace the sensor to increase the gain of the booster Sensor sensitivity is too high Reduce the gain and increase the trigger level Damaged sensor or poor lead contact Check sensor and lead Two-phase flow or pulsating flow Strengthen process management to eliminate two-phase flow or pulsating flow Pipeline vibration Take vibration reduction measures Process instability Adjust the installation location The sensor is installed with different hearts or gaskets protruding into the tube Check the installation and correct the inner diameter of the seal Upstream and downstream valve disturbance Lengthen straight pipe or add flow regulator Fluid is not filled with tubing Change the location and method of loading the flow sensor Body wrap Elimination of wraps Cavitation Reduce flow rate and increase pressure inside the tube 4 Large measurement error Insufficient length of straight pipe Lengthen straight pipe or add flow regulator Analog conversion circuit zero drift or full scale adjustment is wrong Calibrate the zero and span scales Supply voltage changes too much Check the power supply The meter exceeds the verification period Timely inspection The difference between the inner diameter of the sensor and the pipe is large Check the inner diameter of the pipe and correct the meter factor Install different hearts or seals into the tube Adjust the installation, trim the gasket Sensor contamination or damage Cleaning replacement sensor Two-phase flow or pulsating flow Eliminate two-phase flow or pulsating flow Pipe leak Exclude leaks 5 Measuring tube leak In-tube pressure is too high Adjust tube pressure and change installation position Nominal pressure selection is wrong Use high-grade nominal pressure sensor Seal damage Replacement seal Sensor is corroded Take anti-corrosion and protection measures 6 Abnormal whistling of the sensor The flow rate is too high, causing strong vibration Adjust flow or replace large gauges Cavitation Adjust flow and increase flow pressure Body loosening Fastening body 7 Traffic accumulation counter does not work Counter wheel mechanism is not flexible or stuck Cleaning the counter gear or replacing the counter Counter coil off Rewind the coil or replace the same spare part Coefficient setting and programmer component circuit failure Repair the corresponding component circuit or replace the corresponding component Display board front panel component circuit failure Repair the corresponding component circuit or replace the corresponding component Vortex transmitter has no output Repair or replace the transmission unit
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