What are the basic requirements of ultrasonic level meter? Transducer transmits ultrasonic pulses, all have a certain launch angle. From the lower edge of the transducer to be measured between the surface of the media, by the emission of ultrasonic beams radiated by the region, there shall be no obstacles, so the installation should be as far as possible to avoid the tank facilities, such as: ladders, limit switches, heating equipment, brackets, etc.. In the case that can not be avoided, the commissioning must be false echo learning. In addition to note that the ultrasonic beam shall not be intersected with the charging material flow. What should I pay attention to when installing the instrument? The highest material level must not enter the measurement area; the instrument must be kept at a certain distance from the tank wall; the instrument should be installed in such a way that the transducer's emission direction is perpendicular to the liquid surface as far as possible. Instruments installed in the explosion-proof area must comply with the national explosion-proof hazardous area installation regulations. The shell of the intrinsically safe type is plated with plastic. Intrinsically safe instruments can be installed in the explosion-proof requirements of the occasion, the instrument must be connected to earth. What are the requirements for installation location? In the installation of GU601, GU602, pay attention to the instrument and the vessel wall to maintain at least 200mm in the installation of GU603, pay attention to the instrument and the vessel wall to maintain a distance of at least 500mm for conical containers, and for the flat top of the tank, the instrument's optimal mounting position is the top of the container in the center, which ensures that the measurement of the bottom of the container Ultrasonic Level Meter Installation Methods What should I pay attention to? Hanger type installation (only for GU603), moisture, vessel receiver, agitation, foam, air flow (for more detailed information, please refer to the instruction manual) What are the requirements for the vessel receiver? The length of the vessel receiver: It must be ensured that the probe extends at least 10 mm from the receiver. If the reflective properties of the medium are good and the vessel receiver diameter is large, the length of the receiver can be slightly longer than the transducer. The table on the right shows the recommended lengths for different tube diameters. In this case, the end of the receiver must be smooth and free of burrs, and the end of the receiver must be rounded off if possible. In addition, false echo learning must be performed. In case of poor reflective properties of the medium, the mounting can be improved by mounting the instrument in a higher position, and the receiver should be mounted with a waveguide tube (optional) to minimize the influence of the receiver on the measurement. Why do some environments use waveguide tube mounting? The use of a waveguide installation (waveguide or bypass tube) avoids the influence of obstacles, bubbles and air eddy currents in the vessel on the measurement. The diameter of the air holes is 5.... .10mm What is the supply voltage? 24V DC±10% What are the requirements for the installation of the connection cable? General The supply cable can be a normal 3-core cable with an outside diameter of 5...9mm to ensure that the cable entrance is sealed. If electromagnetic interference exists, it is recommended to use a shielded cable. Both ends of the shielded cable should be grounded. Inside the sensor, the shielding must be connected directly to the internal grounding terminal. The external ground terminal on the housing must be connected to earth ground. Cable shielding and wiring If ground currents are present, the shielded end of the shielded cable, on the side away from the instrument, must be grounded via a ceramic capacitor (e.g. 1 μF 1500 V) to suppress low-frequency ground currents while still preventing high-frequency interference signals.
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