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Rich Dewar Product Line Manager Itron

Rich Dewar Product Line Manager Itron. DATTUS III. 1900’s. 1930’s. 1950’s. 2000’s. drivers. BENEFITS Helps meet critical gas delivery requirements Robust design Inventory flexibility & savings Streamlining of meter set design Lower Maintenance High rangeability

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Rich Dewar Product Line Manager Itron

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  1. Rich DewarProduct Line ManagerItron

  2. DATTUS III 1900’s 1930’s 1950’s 2000’s

  3. drivers BENEFITS • Helps meet critical gas delivery requirements • Robust design • Inventory flexibility & savings • Streamlining of meter set design • Lower Maintenance • High rangeability • Easier meter upgrades • More information from the meter • Can address a range of otherwise difficult metering applications. • Built-in configuration flexibility

  4. What is the DATTUS meter? DESCRIPTION • Solid-state gas meter • Fluidic oscillation technology • Designed for distribution measurement • Fits the standard footprints • Designed for future value

  5. Operating Principle The operation of the Dattus meter is based on the fluidic oscillation principle. This static metering technology is based on Bernoulli’s theory—a slow moving high pressure gas becomes a fast moving low pressure gas. Described in 3 elements Flow Tranquilizer Jet Formation Nozzle Oscillation Chamber How Does it work?

  6. Flow Tranquilizer • Conditions the Inlet Flow • Removes effects of inlet piping configurations • Produces a known profile for the nozzle • Accelerates the flow to eliminate any dissymmetry in the initial separation

  7. Jet Formation Nozzle • Forms a distinct jet gas flow profile • Enhances separation in boundary layers to reduce frictional effects • Leveraged the ‘Coanda’ effect that the fluidic meter is based on

  8. An obstacle in the chamber is used to control the fluid feedback paths. As the jet is ‘bent’ to one side of the cavity a pressure node is formed. This creates a difference in pressure either side of the jet and hence a force is exerted on the jet. Obstacle Oscillation Chamber

  9. The force causes the jet to bend to the other side of the cavity where the same effect will be seen. This oscillation only depends on the volume of gas passing through the nozzle. One oscillation cycle will represent a characteristic volume of gas. Obstacle Oscillation Chamber (cont.)

  10. The key to deriving the volume is to ‘count’ the number of fluidic oscillations. The example above uses a thermal sensor and produces a sinusoidal ‘pulse’ to electrically monitor the oscillation. Detecting the Oscillations – Making it a meter R1 V R2 Sensor Resistance R = R1 - R2

  11. Solid-State Measurement ATTRIBUTE The DATTUS III meter has no moving parts. BENEFITS • Will not “lock-up”. • With no impellers, can handle fast on/off applications even in short meter runs. • Ensures continuous gas flow even under failure conditions • Eliminates need for parallel meter runs where design goal is continuity of gas service, hospitals for example

  12. Set Design advantages ATTRIBUTE Solid-State measurement and the associated packaging BENEFITS • Can reduce number of set designs • Offers 2” flange up to 11M • Offers 4” flange up to 56M • Eliminate parallel runs designed for safety or for seasonal loads • No upstream piping requirements • Smaller set design for larger capacity meters

  13. Lower In-Service Costs ATTRIBUTE Design implications on periodic maintenance and verification requirements BENEFITS • Easier to install • Aligned flanges not critical • Level installation not necessary • Requires no oil • May be differential pressure tested • Only regular maintenance item is battery change • No damage from “overspin”

  14. Feature Set Differentiation ATTRIBUTE Electronics lends itself to incorporation of certain feature sets and the ability to record information Features • Built-in temperature compensation • Four pulse output channels • Datalogging • Programmable fixed pressure compensation • Event logging • Alarm indications

  15. DATTUS III Size/CapacitieS

  16. Upgradeability EXAMPLE: fM1 – 8C ATTRIBUTE A DATTUS III meter may have its capacity upsized to any capacity within the range of the model BENEFIT • Allows for reduced and very flexible inventory • Can significantly reduce operational costs associated with meter size changes in the field • Allows for more right-sizing of the meter fM1 – 1M fM1 – 3M fM1 – 1.5M fM1 – 2M

  17. New Design Features in DATTUS III Sensor Technology; • Functionally, they are thermal sensors, same as previously generation DATTUS. • Sensors are encapsulated in glass, but sensitive enough to detect oscillations of the gas. • The glass coating considerably improves the robustness of the sensors. Sensitivity to liquids also greatly improved. Integral TC; • The sensor boards in the meter also include a component for temperature measurement. • Temperature compensation may be activated or deactivated by the customer. • Offers accuracy of +/- 1.8 F (1.0 C)

  18. THANK YOU

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