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DS-9900 Datasheet(PDF) 2 Page - List of Unclassifed Manufacturers |
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DS-9900 Datasheet(HTML) 2 Page - List of Unclassifed Manufacturers |
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2 / 6 page  2 Brodie Smart Meter Manager (SMM)Technology • 2-wire, loop-powered device for ease of wiring and installation • 4-20 mA analog output with Bell-202 modulated HART communication channel • User selectable 0% and 100% analog output ranges with optional smoothing • Flexible (mix & match) units of measure for flowrates, totals, temperatures, densities, etc. • Capability for two flow totalizers: Resettable and inventory • User configurable, scalable pulse output for various engineering units • Comprehensive alarms for both process flow and internal diagnostic checks Flowmeters are supplied with the SMM mounted within the explosion proof UMB enclosure. Capabilities include: • Volumetric and Mass Measurement in selected en- gineering units • Automatic Temperature Compensation • Analog and Pulse Output to remote instrumentation • Diagnostic and System Alarms • 2-Wire Mass or Volume Output • Model 275 Hand-held Interface The Smart Meter Manager provides multivariable flow measurement capabilities that include net/gross volume, low flow cutoff, temperature compensation, accumulative and resettable totalization, product density and mass flow inference. All measure parmeters are factory set with the capability of field programming. The BERT must be located remotely. PRINCIPLE OF OPERATION The Oval Flowmeter accurately measures liquid flow by using a slight pressure differential to rotate a pair of oval gears located within the measuring chamber. Each complete rotation of the gears (rotors) displaces a fixed amount of liquid from the inlet to the outlet of the meter in a continuous flow pattern. When in the position as shown in Figure 1, Diagram 1, all of the driving torque resulting from differential pressure is applied to Gear A. Gear B has zero driving torque since equal areas of gear surface on opposite sides of the axis of rotation are exposed to higher inlet pressure. As the gears begin to rotate (Diagram 2), the torque applied to Gear A decreases but Gear B now has driving torque due to increased area exposed to the high pressure. At the position shown in Diagram 3, all of the driving torque is exerted on Gear B and Gear A has decreased to zero. This alternate driving action provides a smooth rotation of almost constant torque without dead spots. Because slippage between the gears and the wall is minimal, the meter is essentially unaffected by the viscosity and lubricity of the liquids being metered. Figure 1 Principle of Operation SPECIFICATIONS FLOWMETER Viscosity Basic viscosity classifications include: Standard viscosity class from 0.2 to 500 centipoise High viscosity class above 500 centipoise Materials of Construction Body: Stainless Steel CF8M w/Polyurethane Paint Rotors: 316 Stainless Steel Shafts: 316 Stainless Steel (Standard), Chrome Plated (Optional) Rotor Bearings: Carbon (Standard) Waukesha or Carbon Ceramic (Optional) for corrosive/abrasive products O-rings: Viton® (Standard), Teflon®, EPR, Silicon (Optional) See Model Meter Code. Capacities: See Tables 1A (Mass) and 1B (Volumetric) Performance Accuracy: ±0.25% on viscosities of 5 centipoise and above ±0.05% on viscosities from 0.2 to 5 centipoise Repeatability: ±0.05% or better Accuracy vs. Pressure Drop: See Figure 3 Ratings Maximum Working Temperature (Limited to electronics) Process Operating Temperature Class A: -40 to 230°F (-40 to 110°C) Class C: 230 to 356°F (110 to 180°C) Ambient Operating Temperature: -40°F to 150°F (-40°C to 65°C) Storage Temperature: -58°F to 175°F (-50°C to 79°C) Diagram 1 Diagram 2 Diagram 3 |
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