Ultrasonic flowmeter
Ultrasonic flowmeter
(OP)
Anyone have experience with ultrasonic flowmeters and any precautions for using them? We currently have turbine meters installed measuring volumetric flow rate of filtered water. It is a pain to remove these flowmeters for calibration and expensive to buy duplicate "master" flowmeters for calibration, am looking for alternative solutions. Any help would be appreciated.
Thanks.
Thanks.





RE: Ultrasonic flowmeter
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Good on ya,
Goober Dave
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http://www.emersonprocess.com/daniel/
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ultrasonic flowmeters are common in water industry. I am not aware of any specific problem with them.
RE: Ultrasonic flowmeter
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Ignore your UT Flowmeter salesman.
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In think the flow range and pipe size should be specified prior to looking for a proper option.
RE: Ultrasonic flowmeter
some ultra-sonic meters can be used as flow standards such as in natural gas but they are not garden variety or cheap.
what is the line size
RE: Ultrasonic flowmeter
But the original post mentions the presumed effort involved with calibration to a master standard as driving the dissatisfaction with turbine meters.
Assuming the plant's requirement for calibraton is non-trivial, what constitutes a valid calibration? Certified traceable flow stand calibration?
Bucket and stop watch test?
What exactly does the "duplicate 'master' flow meter" accomplish in relationship to the working meters? Are the working meter sent out for flow stand calibration or somehow checked against a master turbine meter?
If the technology changes to ultrasonic, how would a valid calibration be accomplished?
The listing for clamp-on, the standard FUS1010 model transit time ultrasonic flow meter cal certs on the Siemens (formerly Controlatron) spec sheet (page 6) states:
- Wet flow transfer calibration, 6 point; based on nominal line size, up to 36"/DIN900.
Siemens has specific clamp-on ultrasonic flow meters designated as "Check Metering", described as "developed especially for verifying the accuracy and performance of any brand or type of flowmeter."
https
These models include a "certificate of intrinsic calibration". I'm not sure what that means.
Rather than doing an all around replacment of in-line meters, does the certification of clamp-on meters meets your requirement as check meter device? Could you consider using a single clamp-on meter to check the installed working turbine meters, rather than doing whatever it is that is done currently with the master turbine meter?
RE: Ultrasonic flowmeter
looking to my docs today, I passed the following file and thought in might be of help / interest for this post. It covers different flow metering concepts and their applications. It does a relatively good comparison between all types including the ultrasonic method. I know it's only theory but a good experience has always a good theory as the background.