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DCR-1006A Level Controller Rev. B2, 7/15 <br /> • Installation <br /> Proper sensor mounting is critical for successful operation of an ultrasonic <br /> sensor. Using the following guidelines can help ensure trouble free installation <br /> and operation: <br /> • Ensure that the sensor face is perpendicular to the target surface. If the <br /> target is more than a few degrees off perpendicular, it may not be <br /> detected. Targets at greater distances will require more precise sensor <br /> alignment. <br /> • Mount the sensor in a location that provides an unobstructed column <br /> of air from the sensor to the target. The required width of the air <br /> column depends on several factors, including the angle and reflective <br /> characteristics of any potential targets on the edge of the column, the <br /> sensitivity setting of the sensor, the maximum distance to the target, and <br /> the reflective characteristics of the target itself. Generally speaking a 3 to 4 <br /> foot diameter unobstructed column is sufficient even at longer ranges. <br /> 9 ft. 10 ft. _ <br /> 8 ft. <br /> 6 ft. 7 ft. <br /> 5 ft. _ — —' <br /> 3 ft. 4tft. 9° <br /> eft. 1 I <br /> ' Y <br /> 3.8 in. 7.6 in. 11.4 in. 15.2 in. 19 in. 22.8 in. 26.6 in. 30.4 in. 34.2 in. 38 in. <br /> Typical beam spread of a sensor operating at maximum sensitivity <br /> NOTE: Stilling pipes are an excellent solution for liquid level <br /> applications where an unobstructed path to the target is not feasible <br /> (see stilling pipe mounting on page 9 for details). <br /> • When mounting outdoors, it's best to shade the sensor from direct <br /> sunlight. Direct sunlight can warm the sensor housing above the ambient <br /> temperature causing false temperature readings and overcompensation by <br /> the sensor. <br /> Pd':' <br /> 6 <br />