新超聲波流量儀家族提供一個很有用的多功能應用組合，操作簡單、可靠，可用于多種過程應用經(jīng)濟。 Clark solutions clarksonic 超聲波流量儀，據(jù)報告稱此超聲波流量儀非常適用于在非常清潔的液體和許多夾帶固體的液體中測量流量。此流量儀的應用包括：在冷凍的或是用于HVAC熱水中監(jiān)測流速。 ClarkSonic家族擁有兩個主要的操作系列：CSLFC和CSLFB。CSLFC模型超聲波傳送器設計用于測量四分之三英寸和三英寸管，且流量達400GPM。CSLFB型超聲波傳送器，設計用于四英寸和十英寸管，流量達3000GPM的處理。 公司稱ClarkSonic流量計的核心就是一個獨立的ASIC混合信號。其能實現(xiàn)復雜的計時，控制和變頻器驅(qū)動電路可被集合在一起，裝在一個電路板上。ASIC利用特殊的運算法則，提高標準的單徑測量技術(shù)。ClarkSonic傳送器利用環(huán)鳴方法，加上超聲波變頻器交替變換接收和傳送，可測量逆流和順流間傳送聲波飛行時間的差異。 如果脈沖從流量方向發(fā)出的話，從傳送變頻器到接收變頻器脈沖的聲脈沖飛行時間將被縮短，如果從脈沖流量相反方向發(fā)出的話，從傳送變頻器到接收變頻器脈沖的聲脈沖飛行時間將被加長。通過改變傳送和接收變頻器，這些傳送時間上的區(qū)別，可被用于計算流速。環(huán)鳴方法的主要優(yōu)勢是在給定的液體里，液體的速度可被獨立測量。應用此種方法，輸出將不受液體溫度、密度和黏性所影響。 [FONT=times] original text [/FONT] [font=times][Color=#708090]New family of ultrasonic flowmeters offers a useful combination of application versatility, simple operation, reliability, and economy for many general process applications. （Click here to hear comments from Don Tyler, president of Clark Solutions.） Clark Solutions ClarkSonic ultrasonic flowmeters are reportedly well suited for measuring flow in most clean liquids and many liquids with entrained solids. Applications include monitoring flow rates of chilled or heated water for HVAC installations, as well as in municipal, process, and industrial systems. The company says the family frees users from having to calibrate the transmitter to fluid temperature, viscosity, or density, making them very easy to deploy and very reliable. Output is standard 4-20 mA with user definable flow units. ClarkSonic family has two main operating ranges. Model CSLFC ultrasonic transmitters are designed for flows to 400 GPM in ¾ in. to 3 in. pipe, and Model CSLFB ultrasonic transmitters are designed for flows to 3000 GPM in 4 in. to 10 in. pipe. All models feature no moving parts, long-term stability, no pressure drop, broad fluid compatibility, and high accuracy at prices often below other similar instruments. The company says the heart of the ClarkSonic flowmeters is a proprietary mixed signal ASIC, （application specific integrated circuit,） which allows sophisticated timing, control and transducer driver circuitry to be combined on a single integrated circuit. The ASIC uses a special algorithm that improves on standard single-path measurement techniques. ClarkSonic transmitters use the sing around method, where the ultrasonic transducer alternates between transmitting and receiving to measure differences in flight time between upstream and downstream transmissions. The flight time of the sound pulse from the transmitting transducer to the receiving transducer will be shortened if the pulse is launched in the direction of flow, and increased if launched opposite to the direction of flow. By alternating the transmitting and receiving transducers, the difference in these transit times can be used to calculate the velocity of the flow, which when multiplied by the area of the pipe results in a measure of volumetric flow rate. The primary advantage of the sing around method is that the velocity of the fluid is being measured independent of the relative speed of sound in that given fluid. That way, the output is unaffected by changes in fluid temperature, density and viscosity.[/color][/font]