Ultrasonic level gauge analysis of common problems

     Ultrasonic liquid level gauge is widely used in chemical, water treatment, water conservancy, food, food and other industries for level measurement. It is safe, clean, high precision, long life, stable and reliable, easy installation and maintenance, simple readings. The product adopts two-wire system, three-wire system or four-wire system. The power supply circuit and signal output circuit are independent. When using 24V DC power supply, a 3-wire cable can be used. The negative terminal of power supply and the negative terminal of signal output share a core. Line; When using AC 220v power supply, or when using DC 24v power supply, require power supply circuit and signal output circuit completely isolated, a 4-core cable should be used. DC or AC power supply, with 4 ~ 20mADC, high and low switching output.
     Ultrasonic level gauge analysis of common problems:
     1. There is no display on the screen and the probe has no sound: Check if the power supply is normal.
     2. Screen error message ERR01: Check if the probe connection is normal.
     3. Screen error message ERR02: The ID of the probe and the transmitter are inconsistent. Set the ID by pressing the key.
     4. Abnormal relay operation: Check whether the relay settings meet the requirements.
     5, the instrument display is normal, but the output signal current is abnormal: check the wiring is correct, the current load impedance meets the requirements, the central control room module is configured properly.
     6. The panel shows nothing but the probe has sound: Check whether the LCD connection is normal
     7. Invalid keyboard keys: Check if the keyboard connection is normal.
     8, the instrument and the host computer can not communicate: Check the wiring, ID, communication speed, communication protocol is correct.
     9, the instrument close to the normal measurement, remote measurement abnormalities: first check the installation is normal, and then check the parameter settings are reasonable.
     10, the instrument near the end of deadlock: Check whether the actual reaction conditions, check the parameters are reasonable.
     11. After the instrument has been running for a period of time, a serious abnormality is measured: Check whether the instrument is hanging and clean it in time.
     12. The instantaneous flow value fluctuates greatly. The instantaneous flow value fluctuates greatly because the signal intensity fluctuates greatly and the fluid itself fluctuates greatly. Adjust the position of the probe and increase the signal intensity (maintained above 3%) to ensure that the signal strength is stable, such as the fluid itself. If the volatility is large, then the location is not good, and the re-spots should be selected to ensure that the 5D condition of the first 10D is required.
     13, no display boot: check the wiring is correct, whether the power supply. Does the voltage meet the requirements; there are obstacles between the liquid level and the ultrasonic transducer (ie the probe), blocking the emission and recovery of sound waves; whether the liquid level changes too fast, the surface has no bubbles or tumbling fluctuations; the level gauge probe is installed Whether it is vertical or not, if it is inclined, the echo will deviate from the normal line, which will make the meter unable to receive it. When the level gauge is installed, whether the probe and the container wall are too close. If the liquid level is not stable, the echo of the container wall and the direct wave The difference between the sound courses is small, resulting in interference superposition phenomenon, so that the meter indication is not accurate; whether the instrument mounting frame vibration; no liquid level, or the liquid surface is too high, enter the blind area, resulting in no echo signal instrument.
     14, the instrument is only backlit after power-on, without any character display: generally the program chip is lost, it is recommended that the instrument be sent back to the original factory for processing.
     15, the instrument can not be used under the strong interference scene: due to the power supply fluctuation range is relatively large, surrounded by a frequency converter or a strong magnetic field interference, grounding line is not correct. Provide a stable power supply for the instrument, the instrument is installed away from the inverter and strong magnetic field interference, there is a good grounding line.
     16, the probe condensation dew: Lubricating the probe surface can prevent the emergence of dew; tilt installation, the use of gravity to eliminate dew.
     Huajiang Automation can provide you with professional ultrasonic liquid level meter selection suggestions and reliable ultrasonic liquid level meter products. There are any questions you may cause. We will have professional technical personnel to help you answer, and hope to bring you help!

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