Honeywell SMV 3000 User Manual page 200

C.3 Dynamic Compensation Flow Equation,
SMV Operation in a
Steam Application
Example:
Superheated Steam
188
When operating the SMV in a steam application there are number of
considerations you should be aware of.
Be sure the process is at or above saturation when operating the SMV,
since the SMV does not calculate flow when the process is below
saturation.
Operating limit for absolute pressure input is 750 psia(for Model
SMV125), but SMV will continue to make calculations for inputs up
to 1500 psia.
SMV Model SMG170 will operate and calculate to 3000 psig. At
pressures greater than 2000 psia you must operate at less than 100 °F
of saturation temperature.
Operating range for temperature input is saturation to 1500 °F
(815.5 °C), assuming that the temperature sensor used (RTD or
thermocouple) can cover this range, with the exception noted above.
An engineer has specified a SMV 3000 Smart Multivariable Transmitter
to dynamically compensate and calculate the mass flowrate of superheated
steam through a standard 304 SS orifice meter with flange taps. The
engineer has sized the orifice meter to produce a differential pressure of
241.3 inches H2O at 22,345 lb/hr. The flowing pressure is 64.73 psia and
the flowing temperature is 350 degrees F.
The steps in Table C-5 shows how to configure the SMV to calculate the
PV4 flow variable for this application.
SMV 3000 Transmitter User's Manual
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