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Open Channel Flow measurement and channel width + depth

Created by: PILearner at: 7/22/2014 11:15 AM (3 Replies)

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7/22/2014 11:15 AM	Rate (0)
PILearner Posts: 80 Rating: (1)	I wanted to know how does a Hydroranger 200 measures open channel flow. e.g flow in a weir/ flume.will the width and depth of a weir/flume/venturi affect the flow measurement. As a ultrasonic transducer has a certain beam width so if the flume is large and not totally covered by the ultrasonic beam, will the controller accurately measure the flow. Along with this what affect does the change( increase /decrease) in depth of a flume/weir have on flow measurement. 2) can we use hydroranger 200 to monitor flow in a wet well or a rapid sand filter?
PILearner Posts: 80 Rating: (1)
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7/22/2014 3:29 PM	Rate (0)
Levelmans Bronze Member Joined: 12/13/2012 Last visit: 1/16/2019 Posts: 124 Rating: (45)	Dear PILearner , the installing point of the transducer is most relevant for standardizedfluems/weirs. You will findthe installing advices in the manual. http://support.automation.siemens.com/WW/view/en/19436970 It could happen, that we lose some energy if the beam angle touchsthe edges of the fluems/weirs. Therefore, transducershould belocated in the center to minimize the effect. Mostly,OCM measurement will only have short ranges, the beam angle is not that relevant then.There are also filters and algorithms available to handle this in the worst case Q : 2 I guess that it will not be possible to measure the flow here. The kind of constuction is not standardized. Furthermore, thevelicity of the waterwill not be constant hereand also the roughness of the sand etc. will have an incalculable effect to thisflow. Hope this helps ! Cheers Levelmans

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7/22/2014 6:49 PM	Rate (0)
PILearner Posts: 80 Rating: (1)	Thanks a lot Sir
PILearner Posts: 80 Rating: (1)
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7/23/2014 11:19 AM	Rate (0)
Levelmans Bronze Member Joined: 12/13/2012 Last visit: 1/16/2019 Posts: 124 Rating: (45)	You are welcome

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