is your flow meter accurate?
Post on 16-Jul-2015
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Is Your Flow Meter
Accurate?
Is Your Flow Meter
Accurate?
How Do You Know Your
Flow Meter Is Accurate?
Is Your Flow Meter
Accurate?
How Do You Know Your
Flow Meter Is Accurate?
What’s Your Level of
Confidence That Your
Flow Meter is Accurate?
Outline
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Basics of Flow Measurement
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Basics of Flow Measurement
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Typical Types of WWTP Flow Meters
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Typical Types of WWTP Flow Meters
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Accuracy vs. Precision/Repeatability
Accuracy vs. Precision/Repeatability
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Accuracy vs. Precision/Repeatability
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Expected Accuracies: +/-
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Example Case Studies
WWTP 10.80 MGD DesignJan. – Dec. 2012
WWTP 24.0 MGD designJan. – Dec. 2013
Influent 0.405 MGD(1.16 MGD max day)
3.045 MGD(8.83 MGD max day)
Effluent 0.211 MGD(0.708 MGD max day)
3.483 MGD(9.5 MGD max day)
92% difference 14% difference
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Considerations – Mag Meters
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Considerations – Mag Meters
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Considerations – Clamp-On Meters
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Considerations – Clamp-On Meters
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Considerations – Flumes
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Considerations – Weirs
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Considerations – Ultrasonic Level
Transducers
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Layout & Design - Flumes
Layout & Design - Weirs
Layout & Design
Layout & Design – Closed Pipe
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Layout & Design – Closed Pipe
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Common Causes of Problems (i.e.,
Inaccuracy)
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Common Causes of Problems (i.e.,
Inaccuracy)
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Common Causes of Problems (i.e.,
Inaccuracy)
Common Causes of Problems (i.e.,
Inaccuracy)
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Methods to Check
Methods to Check
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Methods to Check
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Methods to Check
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Summary
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Questions
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