Fault category:
The liquid level indication is inaccurate and fluctuating
Operating conditions:
Measure the depth of the liquid level of the initial rainwater tank (usually the main medium is road rain and steam drizzle), normal temperature, normal pressure, and atmospheric exposure. When the liquid level is high, the staff manually starts the P-4480 pump and pumps the liquid level to the water supply
Fault symptom description:
Inaccurate/fluctuating level indication.
Fault causes and judgment ideas:
1. First check the easy to handle, check whether the cable is loose, and check whether the junction box is flooded.
2. Check whether there is noise interference.
3. Whether there are floating and moving things on the water surface of the pool.
4. Whether there are obstacles around the probe.
5. Whether there are water droplets where the probe emits sound waves.
Treatment method:
1. Open the junction box and check whether the transmitter cable is securely connected and water is not flowing.
2. Check the liquid level in the pool: After inserting the steel pipe into the bottom of the pool, mark the depth of the pool surface with a marker 1. After drawing out the steel pipe, mark the water mark 2. Then use the tape measure to measure the length of the two marks, and then use the tape measure to measure the height of the pool surface to the installation point, that is, the blind area.
3. Remove the probe, find a small amount of water beads on the probe, dry with dry noodles.
4. Check the installation hole and find that there is a spider web near the probe before the sound wave is emitted. Remove the spider web and install it well.
5. View the display value The liquid level gauge is consistent with the measured value, and the DCS display data is just consistent.
Preventive measures:
1. The ultrasonic level meter should be cut off before maintenance.
2. Check whether the cable sealing plug is tight and the cover is properly covered.
3. The installation place of the ultrasonic level meter should be equipped with protective measures for shade and rain.
The End
