超声波2007讲义__cn.ppt

Cannot work with the 92. These sensors are much more expensive than other cheaper portable wall thickness gauges on the market. DDU19 is for thickness of 0.8” to 2” (2...50 mm) for steel pipes and 0.16” to 0.6” (4...15 mm) for plastic pipes. As measuring accuracy for a measurement of wall thickness, most manufacturers published a value of 0.1 mm and referred to the dependence on applications. Our measurements showed that, under practical conditions, an accuracy of 0.2 mm for measurements on steel pipes and 0.4 mm for plastic pipes is realistic. These tolerances are in the range provided also by the common pipe standards, therefore is the wall thickness measurement not improving the uncertainty of the flow measurement. REFERENCE: please contact SC-Norway / Paul Boe Branch: 水 / 污 水 Customer: S?dra Cell Tofte 应用实例: 水 from sedimentation pool to sea Temperature: 45°C Flow rate: Range : 0…500 l/s = 0,8 m/s 管道: GRP (glass fiber re-inforced), DN1000,  wall thickness 30mm Solution: Prosonic Flow 93 Clamp-on ultrasonic flow meter. Will replace Heinrich 插入式 Magmeter. Results: Good Signal strength: 65,1 Stable Flow indication. More accurate than 插入式 Magmeter. REFERENCE: please contact SC-CH / Mr. Leardi for further information (Olten 水) Branch: 水 应用实例: The sewage of the Olten region is treated by ARA Olten. The plant went into operation in 19??. The sewage quantity treated currently amounts to ?????. This sewage-treatment plant uses the sewage sludge it generates to produce digester gas before draining and burning the sludge. The gas thus produced covers up to ??% of the energy demand of the plant. At intervals, the digestion tower is charged with the sewage sludge. Depending on the quantity of dry solid matter charged, a corresponding quantity of gas is produced by the digesting process. Once the putrefaction process is completed, the digestion tower is emptied and re-charged. The Measuring TaskThe plant operator wanted to be able to determine the solids content