Dinghua Radar Instrument Training School: Common faults of radar level gauges and their solutions

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A radar level gauge is a measuring instrument based on the time-of-travel principle; radar waves travel at the speed of light, and the travel time can be converted into a level signal using electronic components. The probe emits high-frequency pulses that travel along the cable. When these pulses encounter the surface of the material, they are reflected back and captured by a receiver inside the instrument, which then converts the distance signal into a level signal. Application areas, features, and advantages: Radar level gauges are non-contact measuring devices ； Radar level gauges use microwave pulses for rapid measurement, offering high accuracy and strong resistance to interference ； Corrosion resistance ； High voltage resistance ； High temperature resistance. Application areas: The biggest advantage of radar level gauges is their excellent performance in harsh conditions. They can be used to measure toxic or corrosive media, as well as solid, liquid, dusty, or slurry-like media. Common Faults and Their Solutions:
1. Fault symptom: Fluctuations in liquid level, output percentage, and circuit value.
Measures: Reconfigure the probe length and offset; use other devices to determine the accurate liquid level; adjust the damping coefficient; reconfigure the circuit value.

2. Fault symptom: The output remains the same regardless of the liquid level.
Measures: Verify the probe length; adjust the bias value to achieve an accurate reading.

3. Fault symptom: No liquid level signal is detected.
Measures: Check the dielectric constant of the medium; it’s possible that there is a bridge formation on the probe; the dielectric constant may not be set correctly; the liquid level is in the upper transition zone and was not taken into account during configuration; the circuit board or 16-pin connector may be malfunctioning; reconfigure the probe length.

4. Fault symptom: The output is either at its maximum or minimum value, with poor accuracy.
Measures: The medium may be impure, such as containing water in oil; there might be bridges formed on the probe by the medium or debris; the waveguide may be blocked; foam or viscous substances may be present.

Xi’an Dinghua Electronics Co., Ltd. was established in 1992 and is located in Xi’an, Shaanxi Province. It is a high-tech enterprise that specializes in the research, development, production, sales, and engineering services related to radar-based level measurement instruments. At present, the company offers a range of products including radar level gauges, external measurement level instruments, fork-type level switches, ultrasonic gas flow meters, and electro-hydraulic actuators. All of these products have withstood numerous complex operational conditions in real-world settings, and they are widely used in industries such as petroleum, chemicals, power generation, coal mining, metallurgy, as well as food and pharmaceuticals. Professional selection guidance, excellent product quality, reasonable prices, fast delivery times, and comprehensive one-stop services covering pre-sales, in-sales, and after-sales support…