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In this era of rapid development in automated processes, manual measurement is on the verge of becoming a thing of the past, with radar level gauges emerging as the most common measuring tool today. https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/472f7434c8264a8d823c22d0e6282efd~noop.image?_iz=58558&from=article.pc_detail&x-expires=1670382934&x-signature=nVx6oxUsWL4m8Deh0fKxnw4z2SY%3D But during the measurement process, various unexpected problems can arise, which leads to errors in the measurement results. There are many reasons for these errors, with the four main ones being listed below. 1. Dead zones occur during the measurement process, resulting in inaccurate data. The current output by the instrument during measurement is 4–20 mA. Due to the properties of the liquid being measured and the probe of the radar level gauge, two dead zones (also known as blind areas) arise during measurement. These two dead zones are located at the top and bottom; one is called the upper dead zone (blind area), and the other is called the lower dead zone (blind area). The minimum distance that can be measured between the liquid surface in the upper dead zone (blind area) and the upper reference point is approximately 0.1–0.5 meters. The lower dead zone (blind area) is located at the bottom beneath the instrument probe; as the liquid level in the tank changes, the measurement values for this area do not change. https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/be359b64bb86485290aa4785285f00e3~noop.image?_iz=58558&from=article.pc_detail&x-expires=1670382934&x-signature=S2S3S%2FFbUe5xnrrFD9SwAMHJQik%3D 2. Errors caused by the liquid being measured: when measuring the liquid level, the dielectric constant of the liquid above must be 10 greater than that of the liquid below; if the difference is less than 10, the measurement result will take on a waveform shape. In another scenario, when the thickness of the upper layer of liquid becomes very low, during measurement, since it takes roughly the same amount of time to detect the liquid level and the interface level, the two signals that are returned end up overlapping, which affects the measurement results. 3. The liquid being measured is too viscous. If the liquid in question has a high degree of viscosity, it is very likely to adhere to the probe, thereby affecting the signal and leading to errors in the measurement results. When the viscosity is even higher, it is possible for the probes with dual cables to stick together, which causes inconvenience; therefore, it is necessary to clean the probes regularly as part of maintenance. 4. The instrument itself has errors; radar level gauges utilize advanced measurement technologies and are suitable for various complex environments, offering resistance to pressure and corrosion, as well as being unaffected by temperature and humidity. Errors occur due to issues with the equipment, and the most common cause is improper installation on-site. It is necessary to follow the installation instructions carefully under professional guidance: https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/ab42ee79be6241919699a67a4d2bf044~noop.image?_iz=58558&from=article.pc_detail&x-expires=1670382934&x-signature=rswFQvz89Bzt%2F%2B0eOXmHrFb3zMI%3D