A device with a ultrasonic level gauge indicates the maximum fault detection, analysis: no problems are found after inspection. Since the ultrasonic wave is diverging downward, it is required that the object to be measured requires a sufficient divergence width, due to the flange to the slot The straight section is too long, resulting in inaccurate measurement of the ultrasonic level gauge.
Troubleshooting: Reduce the length of the straight pipe from the flange to the trough, the instrument is easy to use, the value is normal, and a ultrasonic liquid level meter indicates that the device is not allowed to check the fault. Analysis: No problem was found by inspection of the ultrasonic level gauge. Because the installation of the liquid level gauge is not perpendicular to the liquid level of the measured medium, the returned sound wave signal is not well received and the indicator is not accurate.
Troubleshooting: Install the liquid level meter perpendicular to the liquid surface of the measured medium, and the meter is easy to use. The indication value is normal.
3 No ultrasonic liquid level meter shows fault after power transmission. Check and analysis: There is no display after the liquid level meter is powered. First check the 24V power supply and find that there is no problem with the positive and negative 24V output. Measure the power at the meter side once again. No problem, after checking the power supply, it was found that there was a problem with the wiring of the ultrasonic level gauge. LU-30 type ultrasonic liquid level gauge is three-wire system, which is 24V positive, public, and signal three lines. When connecting, the common line should be divided into one, one line should be connected to 24V negative terminal, and the other line should be connected to the negative terminal of signal. The staff carelessly wired the wrong line and caused the meter to lose power.
Troubleshooting: re-wiring, instrument easy to use, normal value.
4 The process reflects the ultrasonic level gauge starts, no liquid level display or display sometimes without failure inspection, analysis: After checking the instrument mounting bracket vibration.
Troubleshooting: normal after refix

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