Phenomenon |
Reason |
Treatment Measures |
| The pipeline has a flow， meter without an output | 1. The power supply is malfunctioning. | 1. Repower or replace the power supply. |
| 2. The power supply is not connected. | 2. Turn on the power. | |
| 3. The connection cable is broken or the boundary line is wrong. | 3. Rewire and check the cable. | |
| Meter has a display but no output | 1. The flow rate is too low and not in the measurement range. | 1. Increase the flow rate or reselect the flow meter. |
| 2. There is a fault in the stage of the amplifier board. | 2. Replace the motherboard. | |
| 3. There is damage to the probe body. | 3. Replace the probe. | |
| 4. The pipe is clogged or the sensor is stuck. | 4. Reinstall the meter. | |
| No flow but output after power on, the stable output signal |
1. The output frequency is 50 Hz industrial frequency interference. |
1. Choose a cable with shielding and rewire it according to the regulations. |
| 2. The amplifier board is damaged and generates self-excitation. |
2. Replace the amplifier. | |
| The output signal has changed | 1. There is strong electrical equipment or high-frequency interference near the flowmeter. |
1. Re-select the installation location. |
| 2. The pipeline has strong vibrations. | 2. Reinforcement of the flowmeter installation part of the pipe. |
|
| 3. The magnification of the amplification board or trigger sensitivity is too high. |
3. Decrease the magnification (GB) or sensitivity (SB) counterclockwise. |
|
| 4. The pipeline valve is not completely closed and there is leakage flow. |
4. Check the valve. | |
| Unstable flow output, selection, and installation of extreme pipeline reasons |
1. There is a strong electrical interference signal, the instrument is not grounded, and the flow and interference signal are superimposed. |
1. Reconnect the shield ground. |
| 2. Insufficient straight pipe section or inconsistency between the inner diameter of the pipe and the inner diameter of the instrument. |
2. Replace the installation position again. |
|
| 3. The effect of pipeline vibration. | 3. Reinforce the pipeline to reduce vibration. |
|
| 4. The flow meter is installed with different centers. |
4. Reinstall the meter. | |
| 5. The fluid is a full pipe. | 5. Check the fluid flow conditions in extreme instrument installation positions. |
|
| 6. The flow rate is below the lower limit or above the upper limit. |
6. Increase and decrease the flow rate or adjust the amplifier plate filter parameters. |
|
| 7. The presence of air pockets in the fluid. |
7. Install a valve downstream of the instrument to increase the back pressure. |