flow meter training coursewhatcom.wsu.edu/.../05flowmetertraining.pdfa flow meter is a device that...

Seametrics® Internal and Confidential

Flow Meter Training CourseFebruary 22, 2017


PresentersKatie Englin – Seametrics

Paul Carlson– Seametrics

www.seametrics.com

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Topics

Flow Meter FundamentalsFlow Meter SelectionHow they WorkFlow Meter OptionsNew trends in flow meters, mechanical vs no moving parts, cost benefitsAccuracy - options on field verification vs factory calibrationRemote monitoring of flow meters

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Flow Meter Fundamentals

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What is a flow meter?

A flow meter is a device that measures the rate of flow and provides either a visual display or some type of communication. (Output)

Provides information for instantaneous flow rate

May provide information for instantaneous flow direction

May provide information for totalized flow


Flow Meter Fundamentals

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Why measure flow?

What does flow rate mean?“Rate” implies “per unit of time”

What does flow total mean?“Total” implies the total volume passed through the meter

Flow is generally measured to accomplish something Display only Display and control Data-logging

Examples of Rate:

Gallons per minute (GPM)

Cubic feet per second (CFS)

Examples of Total:

Gallons (Gal)

Cubic Feet (CF)


Flow Meter Selection

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Pipe sizeFlow rangeMedia Temperature and pressureHow much straight run pipe is availableHorizontal or vertical installationAre outputs needed (examples: Pulse, Modbus, 4-20mA)Accuracy requirementRequired maintenance



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Mechanical vs Electromagnetic

Mechanical meters have been around the longest, and include: propeller style, turbine, multi-jet and paddlewheel. Moving part meters Economical, require longer straight run of pipe, less accurate than mag meters

Electromagnetic metersNo moving parts, install in tight spaces, more accurate than mechanical style meters

Example: Propeller style in line mechanical meter Example: Magnetic style in line flow meter



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Insertion Style vs Inline style – Both available as mechanical or electromagnetic

Insertion Style Meters - Easy to install, typically no welding is required, and some can be installed while the line is under pressure (no system downtime)Require longer upstream/downstream pipe requirementsTypically less accurate than in line meters

Inline Flow Meters – Require more labor to install. Install in tight spaces (typically 2 pipe diameters upstream and 1 downstream), and are more accurate than insertion style meters


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Insertion Style vs Inline style – Both are available as mechanical or electromagneticExamples of electromagnetic insertion and in line style meters:

EX100/200 Series Electromagnetic Adjustable Depth Insertion Meter

3”-48” Pipe SizesStainless Steel or BrassExternally PoweredHot Tap Available

WMP Series Electromagnetic Inline Corrosion Resistant Meter

1” – 3” Pipe SizesExternal or Battery Powered2:1 Straight Pipe RunCorrosion Resistant

3”-12” Pipe Sizes2:1 Straight Pipe RunPulse, Modbus 4-20mA output AvailableModbus AvailableIP68 AvailableBattery Powered (powered version available)

AG3000 Series Electromagnetic Inline Flanged Meter


IP110/IP114 Series Sensors

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Paddlewheel technologyOnly one moving partAdjustable depth3” to 40” pipe diameterPVC, brass, or 316 stainlessAccuracy 1.5% of full scaleElectronics can be installed directly on the meter, or remotelyWide flow rangeAdapters mate with standard 1 ½” or 2” NPT threaded fittings such as

saddles and weldoletsFT400 Series Indicator available for meter or remote mount


Proper Meter Installation

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Follow Manufacturers recommendations on straight run pipe to ensure the meter is working properly and within specified accuracy range


Flow Profile and Meter Performance

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As velocity varies, is there a place where the average velocity is most representative?

Is the flow laminar (smooth)? Is the pipe full?

Proper insertion depth for mechanicals is critical

Velocity slows to zero at pipe wall

As velocity increases, curve becomes parabolic

(bullet shaped)


How They Work: Mechanical Meters

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Paddlewheel/turbine spins with flow

Magnets in wheel pass near sensor

Sensor has either reed switch, or Hall-effect electronic switch, with “pulse out” via open collector, current sinking output


How they Work: Mechanical Meters

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Example of irrigation mechanical propeller meter – Require minimum of 10 pipe diameters upstream, 5 downstream to ensure accuracy

Straightening vanes available –Require minimum 5 upstream/2 downstream


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Use Michael Faraday’s Law of Electromagnetic Induction to determine the flow of liquid in a pipe Magnetic field is generated and channeled into the liquid flowing through the pipe Flow of a conductive liquid through the magnetic field will cause a voltage signal to be sensed by

electrodes As the fluid moves faster, the voltage generated is proportional to the movement of the liquid The electronic transmitter processes the voltage signal to determine liquid flow (rate and total)

How They Work: Electromagnetic Meters

Michael Faraday1791-1867


How They Work: Electromagnetic Meters

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Electrical coils placed outside the flow are momentarily energized.

A magnetic field crosses the flow at right anglesMotion of a conductive fluid through the field generates a

small amount of electricity, as in a generator (more flow = more voltage)

Electrodes measure the changing voltageDisplay unit shows rate and total


How Magmeters Work

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Electrodes sense the change in voltage

Increasing Flow


Flow Meter OptionsNew trends in flow meters, mechanical vs no moving parts, cost benefitsElectromagnetic – More accurate, no moving parts to wear out,

install in tight spaces, come standard with outputs, very low maintenance, good for clean or dirty water, typically telemetry ready

Ultrasonic – No need to break into piping, no moving parts to wear out, no obstruction in flow path, complete chemical compatibility, measure wide range of flowing media from clean liquids to slurries

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Introducing the jWAVE with Data LoggingSeametrics Portable Ultrasonic Flow Meter


jWAVE Description• The jWAVE Flow Meter solution starts with the jWAVE App and

works on both iOS and Android devices

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What is an Ultrasonic Meter?• An ultrasonic flow meter is a type of flow meter that measures the

velocity of a fluid with ultrasound to calculate volume flow. • Using ultrasonic transducers, the flow meter can measure the average

velocity along the path of an emitted beam of ultrasound• An ultrasonic flow meter is installed on the outside of the pipe and is able

to sense, or meter, through the wall of the pipe.• Types –Open Channel, Doppler, Transit Time – jWAVE is a transit time

meter

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What is an Ultrasonic Meter?• Ultrasonic flow meters are affected by the acoustic properties of

the fluid and can be impacted by temperature, density, viscosity and suspended particulates depending on the specific flow meter.

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• Transit Time (jWAVE)• Transit-time flowmeters measure the difference in travel time between

pulses transmitted in a single path along and against the flow. Transit Time meters prefer relatively clean fluids.

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SpacingDownstream Transducer

Clamp Fixture

Upstream Transducer

Acoustic Path


jWAVE Features• PORTABLE• The clamp-on ultrasonic sensor design mounts onto the outside

of your pipe and senses through the pipe wall• It should only take a few minutes to install and is the only piece of

hardware you transport• Wireless Bluetooth connection sends readings to the jWAVE app

on your mobile device• Installs in minutes• +/- 2% accurate

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The jWAVE Anatomy

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Movable Acoustic

TransducersIntegrated

RulerPower Button

USB External Power Plug &

Battery Charger

Cam Cleat for Mounting Strap

Rugged Acetal End Housing & Foot

Anodized Aluminum Channel

Bi-Directional Flow Sensing


jWAVE Description• The sensor is a compact, clamp-on, transit time, ultrasonic

transducer device that wirelessly transmits flow measurements

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Introducing the AG3000

Water Solutions For Life


AG3000 Series Electromagnetic Irrigation Meter

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AG3000 Electromagnetic Irrigation Meter• 5 year battery life• +/-1% accurate (-P version is +/-.75% accurate)• Easy to use user interface with dozens of totalizer/indicator options• Pulse output is standard• Optional Modbus or 4-20mA outputs• IP68 RATED For Submersion & Direct Burial • 5 Year battery life • Built in datalogger• Telemetry ready for wireless meter reading • Batching capability• Bi-directional flow read capability• No moving parts with unobstructed flow • Installs in tight spaces • Made in the USA

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Field Installations

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Product Certifications and Testing• IP68 Rated:

• Allows for direct burial and submersion• CE• CSA (In process)• Made in the USA• Third party testing conducted at Utah State Water Research Lab

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Benefits of Full Bore Mag Meters• Install in cramped piping –Minimal straight pipe• No bearings to wear out, no meter rebuilds• Built-in pulse output (no additional charge)- Use it now or use it

later• More accurate than insertion mag meters or mechanical flow

meters• Rugged design• Accurate over a wide range of fluid velocity

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Accuracy and Calibration Portable ultrasonic meter can be used for field verification of

meter accuracy

Typically meter manuacturers offer factory calibration.

NIST traceability testing ensures meter is tested to National Institute of Standards Technology standards

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Cloud

Remote Meter Reading – How it Works


Remote Meter Reading – Options

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Pulse or Modbus output ties in to telemetry system

Seametrics meters have been successfully used with the following telemetry systems: Ranch Systems, Observant, and Wildeye


Seametrics Offers

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Electromagnetic, Mechanical and the jWAVE Ultrasonic flow meter Insertion style and inline style flow meters Up to 0.5% accuracy NIST traceable calibration Low voltage DC designs for alternative power User friendly installation and operation Made in the USA meters – mfg in Kent, WA Two-year warranty on all products (flow meters and

controls)


Thank you for your time.

flow meter training coursewhatcom.wsu.edu/.../05flowmetertraining.pdfa flow meter is a device that...

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