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| >-On Ultrasonic Flowmetei | ||||||||||||||||||||||||||
| MUL-310 Series | ||||||||||||||||||||||||||
| Clamp-On Ultrasonic Flowmeter with DSP Technology | ||||||||||||||||||||||||||
| The resistance to bubbles has been sharply improved by the new signal process method "DSP" (Digital Signal Processor). If bubbles are contained in the fluid, the transmission of the ultrasonic signal is impeded and the measurement of signal gets impossible to be made. Signal process technology has been adopted for MUL-310, and even if the bubbles are contained in the fluid, the stable measurement of signal can be made. (It is not possible to measure the signal in case of many bubbles contained in the fluid.) The particles are not generated and the metallic ion are not mixed to the fluid because of the perfect non-contacting measuring method adopted. There is no pressure loss due to no obstacle in the flow path. This unit is not influenced by the pressure or conductance of measuring fluid. No moving part, and excellent long-time stability. Indication, totalization, electric current, pulse and alarm output are provided as standard. | ||||||||||||||||||||||||||
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| MUL-310 is "Time flight" type Ultrasonic Flowmeter for liquids. Since the ultrasonic receiver required for the flow measurement is installed by the clamp-on system from the exterior of piping, it does not contact the measuring fluid at all, and also there are no worries about generating of particles and mixing of metallic ion to the fluid. It is suitable for the measurement of flow rate of pure water and ultrapure water for semiconductor industry. | ||||||||||||||||||||||||||
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| Measuring Principle | ||||||||||||||||||||||||||
| The calculation is done by the following formula: 2Vmcos 0 = 2L / tAB - 2L/tBA = 2L (tBA - tAB) / (tBA x tAB) Vm = L (tBA - tAB) / (cos 0 x tBA x tAB) The distance between A and B (L) and the angle (0) are known, and the average velocity is mathematically calculated. | ||||||||||||||||||||||||||
| As shown in Fig.1 the ultrasonic is transferred from A to B and B to A in turn with a angle of 0. The required duration of transfer of two directions is different when measuring medium is moving from upstream to downstream. The duration of transfer is expressed by the following formula. tAB = 2L / (Co + VmCOS 0) tBA = 2L / (Co - VmCOS 0) Where 2L: Distance between A and B Vm: Average velocity of medium Co: Sonic speed in stable medium tAB, tBA: Duration of transfer of Ultrasonic from A to B and B to A By measuring the difference of the transfer duration, the average velocity of medium can be calculated. | ||||||||||||||||||||||||||
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| ■orporate Headquarters 1060 S. Rogers Circle Boca raton, FL 33487 Singapore Office 10 Ang Mo Kio Street 65, Techpoint #02-14, Singapore 569059 HI Ph: 1-800-637-6418 Ph: 65 - 64823533 ■fl Fax: 561-995-0622 Fax: 65 - 64844231 http://www.malema.com © copyright 2004 | | ||||||||||||||||||||||||||