These and other objects, features, and advantages of the present invention will become apparent from the drawings, the descriptions given herein, and the appended claims. Advertisement Hide. There are provisions for automatically correcting for variations in the dimensions of the measuring conduit due to variations in fluid temperature. The amount of pulse shifting might be determined by measuring the number of whole pulses detected starting with the first whole pulse after bypass start line and ending with the first whole pulse detected after the change shown very roughly here for explanation purposes as line Flowmeter inaccuracies may also be more of a permanent nature due to flowmeter wear, obstruction, and the like.
conditions, requires regular precision calibration by a meter prover operated by a Note: Small Volume provers are sometime called Ballistic or Double Pulse Once we know the meter and prover are suitable for the product and flow rate.
Compact Provers Emerson US
Flow MD, the world class leader in Small Volume Prover Technology, raises the bar Train or Offshore load racks; Test or calibration labs; Pipelines; Refineries. Packaged in static or mobile configurations, Emerson Small Volume Provers are the most FPSO/FSO, Refining, Terminals, Tank Farms, Calibration Laboratories any pulse output flow meter; Save significant costs with automated proving of.
The calibrated portion of pipe 14 of the double chronometry prover 10 between first detector 16 and second detector 18 downstream from the non-computational flowmeter 30 flow synchronously with respect to the same volume of fluid that flows through non-computational flowmeter In the embodiment shown in FIG.
A flowmeter may further comprise one or more measurement elements wherein a pulse interval measurement module is operable for producing one or more signals representative of one or more delays or intervals between an initial excitation of at least one of the one or more measurement elements and the output pulse.
In one possible preferred embodiment, the time shifting may preferably be used to match the measured flowmeter volume with the timing of the calibrated flow volume of timer A. In another embodiment of the invention, the invention may comprise a time shifting method for shifting the time of a series of flowmeter output pulses for comparison with the calibrated flow volume that flows in the interval defined by starting and stopping timer A.
Provers, Flow Management Devices, Liquid and Gas Measurement Technology FlowMD
In another embodiment, a signal representative of the delay may be encoded into the output pulse train or otherwise be combined such as by modulation, use of different frequencies, or the like.
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|A four-way control valve is connected by flow conduits to the conduit containing the flow meter and is connected by a conduit system to respective extremities of the calibration barrel.
A flag or displacer moves between the starting and ending sensors along with a calibrated fluid column. Sign in to add this video to a playlist. In another embodiment of the invention, a method for proving a computational flowmeter may comprise one or more steps such as, for instance, determining a correction interval or time interval C between a measurement of fluid flow within the computational flowmeter and a flowmeter output for said measurement.
The present invention relates generally to flowmeters and provers and, more particularly, to a system and methods for proving flowmeters which provide computationally derived readings of fluid flow, such as ultrasonic flowmeters and Coriolis mass flowmeters.
USA1 Flowmeter/prover system and method Google Patents
The illustrations presented here include dual chronometry on a ballistic prover. Provers. (Also Known As. Compact, Ballistic. Captive Displacer, detectors in the calibrated section of the pipe and then in the opposite direction counter two will allow for accurately counting a fraction of a flow meter pulse.
As their name implies, SVPs have a calibrated volume significantly smaller than Commonly referred to as Ballistic, Compact, or Syncrotrak Provers, SVPs Most SVPs have a precision-machined barrel (flow tube), piston, and piston shafts.
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Video: Ballistic flow prover calibration Proving Meters with Pipe Provers
In another possible embodiment, the determining a time interval C might comprises detecting a change of the fluid flow rate through the prover. Simply stated, substantially uncompressible fluid 32 moving through flowmeter 30 should correlate with an equal increment of fluid further along the line, i.
How to Calibrate Flowmeters and Velocity Meters SpringerLink
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The method of claim 3 further comprising selecting an ending for said time interval B portion of said series of flowmeter output pulses for comparison with said time interval A to prove said flowmeter by selecting a whole flowmeter output pulse that occurs after stopping clock A, and after said time interval C. Launch valves are interposed between the control valve and the calibration barrel and are selectively positioned to permit metering flow through the calibration barrel only after the control valve has been positioned for directional flow of fluid through the conduit system and the calibration barrel.
Answers With Joe - Duration: The pulse may be started at the zero crossing, rising, falling edges, selected trigger levels, or the like as desired. This volume is then compared with the volume which is measured by the meter under test.