Rosemount 8800 Multivariable Vortex Flowmeter--MARISEM

Rosemount 8800 Multivariable Vortex Flowmeter

Category: 涡街流量计 Publish Time: 2013-11-19 14:48

Rosemount 8800 Multivariable Vortex Flowmeter

The Rosemount 8800 Multivariable Vortex Flowmeter combines your temperature and flow devices into a single, highly accurate instrument, eliminating the costly installation of two separate devices. And with its non-wetted sensor design, shutdowns for maintenance or repair aren’t even an issue.

MultiVariable™ Vortex can save up to 30% per installation by eliminating the need for external temperature compensation for saturated steam applications.

Integral temperature sensor enables temperature compensated mass flow for saturated steam
Removable temperature sensor eliminates the need for process shutdown for temperature sensor verification or replacement
Mass flow, volumetric flow or temperature are available as configurable outputs

Features & Benefits：

Reliable, Cost-Effective Steam Measurement


Reduce Cost, Improve Performance
Uncompensated vortex meters have moderate accuracy in saturated steam and externally compensated vortex meters are expensive. The Rosemount MultiVariable Vortex provides a cost-effective flowmeter with improved accuracy.



Rosemount Reducer Vortex Technology
Many steam applications require flowmeters for low flows due to seasonal or process demands. Much of the measuring range of traditional vortex is at higher velocities and is susceptible to missed measurement at low flows due to low flow cutoff. Reducer Vortex eliminates this problem by using a smaller meter body to achieve the application rangeability required, allowing you to capture steam usage even at low flow rates.

Increased Plant Availability

• Emerson has integrated a temperature sensor into our MultiVariable Vortex meter body that is isolated from the process and separate from the vortex sensor. This facilitates independent verification or replacement of each sensor without breaking the process seal.

• Plant Availability is further improved by providing the ability to bring the additional measured and calculated variables back to the control system for improved process control and monitoring. Variables can be assigned to the 4-20 mA output, the HART output, or the optional pulse output.

Reduced Maintenance Costs

• Maintenance costs are reduced by using one flow sensor for all line sizes, eliminating the need for gaskets, and by being able to use one spare temperature sensor for any line size.

Increased Safety and Environmental Compliance

• The MultiVariable vortex flowmeter improves safety and environmental compliance by keeping both the flow sensor and temperature sensor from directly contacting the process fluid. This eliminates the need for additional gaskets and seals required in many other designs.

Easier verification and troubleshooting through device diagnostics

• Internal signal generator standard in every vortex for easy electronics verification

• Also able to easily accept an external frequency source

• Diagnostics constantly monitor health of temperature sensor

Specifications：

Key Specifications
Flowmeter Volumetric Accuracy	± 0.65 % of rate for liquids ± 1% of rate for gas and steam
Temperature Sensor Accuracy	± 2.2°F (1.2°C)
Mass Flow Accuracy	± 2.0 % of rate for saturated steam
Turndown	38:1
Output	4-20 mA with HART® 4-20 mA with HART® and Scalable Pulse Output
Wetted Material	Stainless Steel - 316 ⁄ 316L and CF3M Consult Factory for other wetted material options
Flange Options	ANSI Class 150 to 600 DIN PIN 10 to 100 Flanges are available in variety of facings
Operating Temperatures	-330°F to 800°F (-200°C to 427°C)

Applications：

The Rosemount 8800 MultiVariable Vortex Flowmeter is suitable for liquid, gas, and steam applications. The MultiVariable Vortex has all the same great features of the standard 8800D in addition to the ability to provide multiple, independent outputs and a temperature compensated mass flow output for saturated steam.

MultiVariable Vortex Applications

Temperature compensated mass flow of saturated steam
Temperature and volumetric flow output as independent variables for compensation in a flow computer or control system
Volumetric flow as primary output with temperature output for use in a monitoring application (especially where it may be cost prohibitive to try to install a separate temperature sensor and transmitter)
MultiVariable Vortex Technology Improves Custody Transfer of Saturated Steam
We Energies Reduces Costs, Improves Performance and Reliability on Saturated Steam

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