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Emerson's Rosemount 3051S Ultra for Flow

Source: 8/14/2005, Location: Middle East

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Emerson Process Management has announced that its technology is again revolutionizing flow metering performance, while reducing process variability and lowering installation costs. Whereas traditional orifice-based DP flowmeters have only been able to maintain accuracy over a narrow 3:1 operating window, Emerson's Rosemount® 3051S Ultra for Flow can support up to 14:1 flow turndown with better than a 0.5% of reading accuracy. Performance with the 3051S Ultra is specified as a percent of reading, instead of the traditional percent of span. This method of specification eliminates the performance degradation inherent in the nonlinear relationship between flow and differential pressure. Because a 10:1 flow turndown results in a 100:1 DP turndown, a DP pressure transmitter specified as 0.075% of span will only be 7.5% accurate over the entire flow range.

Emerson's revolutionary approach is based on its SuperModule® platform, the foundation of the Rosemount 3051S transmitter. To deliver enhanced functionality that supports scalable performance, Emerson uses a unique approach to the design and manufacture of the SuperModule platform that optimizes transmitter performance over wide flow turndowns. The hermetic, all-welded SST housing enables the performance to be maintained in the harshest environments. Coplanar™ process isolators allow the sensor to float freely, eliminating the effects of installation-induced errors.

With the 3051S, each transmitter is manufactured according to the performance requirements of its intended application. For flow applications, this results in Ultra for Flow being unsurpassed in performance and capability.

Ultra for Flow technology delivers important user benefits including the following:

Improved accuracy over wide flow turndowns reduces installation costs. Seasonal temperature variations have traditionally resulted in widely fluctuating flow rates. The wide flow turndown of Ultra for Flow eliminates the need for stacking flow transmitters to compensate for these fluctuations. Users realize better performance and lower installation costs. In addition, the common practice of seasonally changing plates is avoided for additional operations savings.
Extended stability minimizes maintenance costs due to the lengthening of calibration intervals. A 10-year stability guarantee is standard.
Better flowmeter accuracy and repeatability enables more accurate control of processes over wider flow ranges.
Unprecedented reliability. Ultra for Flow is backed by a 12-year warranty.

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