Webcast Slides - Accuracy of In-Service Water Meters

95 Pages·2010·7.55 MB·English

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1 © 2010 Water Research Foundation. ALL RIGHTS RESERVED. No part of this presentation may be copied, reproduced or otherwise utilized without permission.
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© 2010 Water Research Foundation. ALL RIGHTS RESERVED. No
part of this presentation may be copied, reproduced or otherwise
utilized without permission.
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© 2010 Water Research Foundation. ALL RIGHTS RESERVED. No
part of this presentation may be copied, reproduced or otherwise
utilized without permission.
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9/14/2010
WaterRF Teleconference September 2010
Michael C. Johnson
SStteevveenn LL. BBaarrffuussss
Utah Water Research Laboratory
Utah State University
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Accuracy of In-Service Water Meters at Low
and High flow Rates – Project No. 4028
Sponsored by The Water Research Foundation
Formerly known as the AWWA Research Foundation
Four Year Project Started: October 2006
Completion Date: October 2010
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• New meter accuracy and endurance testing
• Effect of particulates on accuracy
• Pulled meter accuracies
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PROJECT ENCOMPASSES……..
•Meters from 15 US manufacturers (purchased from local distributors)
•5/8 x 3/4-inch through 2-inch sizes
•Wide range of flow rates
•Involvement of twelve utilities
•Quality control on measurement equipment and procedures
•Data management
MMEETTEERR TTYYPPEESS
ND: Nutating Disc (Positive Displacement)
DP: Displacement Piston (Positive Displacement)
MJ: Multi-Jet
SJ: Singgle-Jet
FO: Fluidic Oscillator
TU: Turbine
PR: Propeller
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TThhiiss pprreesseennttaattiioonn ssuummmmaarriizzeess tthhee aaccccuurraaccyy
results for:
• 150 new 5/8 x 3/4-inch meters.
Six identical meters were used as the sample size (ss) for any
given meter resulting in twenty five different meter designs (md)
being tested.
• 102 new 3/4-inch meters.
(ss= 6, md= 17)
• 90 new 1-inch meters.
(ss= 6, md= 15)
• 14 new 1 1/2-inch meters.
(ss= 1, md= 14)
• 19 new 2-inch meters.
(ss= 1, md= 19)
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Water meters need to be accurate at normal
operating flow rates, as even small errors in the
accuracy of residential, commercial, and
industrial water meters can create shortfalls in
water utility revenues or result in over-billing of
customers.
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5/8 x 3/4 –inch Maximum Flow Rate
Type  Flow (gpm) Upper (%) Lower (%)
DP 15 101.5 98.5
ND 15 101.5 98.5
FFOO 1155 110011.55 9988.55
SJ 15 101.5 98.5
MJ 15 101.5 98.5
5/8 x 3/4 inch meters
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