Phenomenon |
Reason |
Treatment Measures |
| Instantaneous flow rate with constant maximum value | 1. The cable wire is disconnected or the sensor is damaged. | 1. Replace the cable or replace the sensor. |
| 2. The fuse in the transmitter is burnt out | 2. Replace the fuse. | |
| 3. Sensor measuring tube blockage | 3. After unblocking, tap the sensor housing, and then measure the AC and DC voltage, still unsuccessful, the installation stress is too large, so reinstallation. | |
| When the flow rate increases, the flow meter indicates a negative increase | The sensor flow direction is opposite to the flow direction indicated by the housing, and the signal line is connected to the opposite direction. | Change the installation direction and change the signal line wiring. |
| When the fluid flows, the flow rate shows positive and negative jumps, and the range of jumps is large and sometimes maintains a negative maximum value | 1. Power supply AC/DC shield line grounding greater than 4Ω. | 1. Re-grounding. |
| 2. Pipeline vibration. | 2. Change the connection pipe with the flowmeter to a metal hose connection. | |
| 3. The fluid has gas-liquid two-phase components. | 3. Open a hole in the pipe above the flow meter and install a valve to discharge the gas phase components | |
| 4. There is a strong magnetic field or RF interference around the transmitter. | 4. Change the environment around the transmitter. |