Liquid level switch debugging and failure analysis

1. When the C mode liquid level switch is installed in place, the following debugging can be carried out: Menu → C mode → A point threshold -- high alarm (installation position is high) → 15000 (the diameter of the storage tank) → return → equipment basic information → check Password→666666→Confirm→Return→System Main Settings→Default Sound Velocity→1000 (different medium sound velocity is different)→Confirm→Return→System Advanced Settings→Liquid Level Zero Mutation Speed→1→Confirm→Return→Main Probe Basic Settings→Main Transmit Frequency→160→Confirm→Return→Main Probe Advanced Settings→Main Gain Type→2→Confirm→Return→Diagnosis→Signal Cleanliness→300→Confirm→Return→Restart Correctly caused alarms. If the waveform is good, re-fill the correct sound velocity to make the measured diameter correct. If the waveform is not good, you need to flush and install the probe. The liquid level switch is falsely reported, and it is falsely reported at the position less than the alarm point. Check the waveform to see if the waveform is normal, and see if there is an obstruction in front of the probe. There is a bracket inside the vertical floating roof tank, which is prone to false alarms. You can move the probe down to some positions. two. When the B-mode liquid level switch is installed in place, the following debugging can be carried out: Menu→B-mode→Type→Energy→Confirm→Return→Calibration Type→Empty Calibration (The high alarm is empty calibration, and the low calibration is selected when there is liquid in the probe installation position. )→Confirm→Return→Calibrate Threshold→3500→Confirm→Return→Main Dead Zone Start Point→100→Confirm→Return→Main Dead Zone Window→800→Confirm→Return→Main Probe Advanced Setting→Gain Type→2→Confirm→Return→ Mode B→Calibration→Confirm (after successful calibration)→Restart Mode B Waveform Problems that may occur in Mode B: false alarm of the liquid level switch. The cause of false alarm is generally caused by not performing calibration for a long time, which can be solved by re-calibrating the meter. If there is still a false alarm, it means that there is a problem with the installation of the probe. After reinstalling the probe, re-debug it. The probe is installed in the wrong position. The distance between the two probes should be 1 meter apart when they are horizontally parallel.

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