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Product Specification Sheet
00815-0100-4810, Rev AA
June 2005
Emerson Process Management
© 2005 Rosemount Inc. All rights reserved.
¢00815-0100-4810¤
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OUNDATION fieldbus is a registered trademark of the Fieldbus Foundation.
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Rosemount Inc.
8200 Market Boulevard
Chanhassen, MN 55317 USA
T (U.S.) 1-800-999-9307
T (International) (952) 906-8888
F (952) 949-7001
www.rosemount.com
Emerson Process
Management GmbH & Co.
Argelsrieder Feld 3
82234 Wessling
Germany
T 49 (8153) 9390
F 49 (8153) 939172
Emerson Process Management Asia Pacific
Private Limited
1 Pandan Crescent
Singapore 128461
T (65) 6777 8211
F (65) 6777 0947
Enquiries@AP.EmersonProcess.com
Mass Flow Flowmeters
For compressible fluid applications (i.e. steam and
gases), multivariable differential pressure flowmeters
are ideal. These flowmeters shall perform real-time
calculations by compensating for changes in the
COP flow coefficient (Cd) factor, gas expansion
factor, velocity of approach factor, density or
compressibility, viscosity, and Reynolds Number.
When a multivariable transmitter is integrated with
the COP, the flowmeter shall perform within ±0.7% to
±0.9% of mass flow rate in gas and steam. The
vendor shall make independent testing
documentation available demonstrating this
performance.
Functional Specifications
• The flowmeter shall provide a fully
compensated mass flow output.
• The flowmeter shall have the capability of
either a Gage Pressure (GP) sensor or an
Absolute Pressure (AP) sensor.
• The pressure instrument shall be two-wire,
multivariable (differential pressure, pressure,
and temperature).
Software Specifications
• Pressure Instrument outputs shall be a 4-20
mA analog signal, user-selectable to represent
mass flow, differential pressure, static
pressure, or temperature, with a
superimposed digital signal, using HART
®
protocol.
• The pressure instrument shall perform
continuous diagnostics, capable of self-test
functions and be able to provide specific
diagnostic information.
• Basic configuration capabilities of the pressure
instrument shall allow the user the ability to
input and store information including the
range, engineering units, damping, drain / vent
valves, flange, and O-ring materials, date,
message, descriptor, tag number, and serial
number.
• Mass flow configuration shall allow the user to
input and store information including the fluid
name, fluid density, fluid viscosity and the
COP primary element calibration factor.
To calculate mass flow, the transmitter shall utilize
the full DP mass flow equation:
Where,
Q
m
= Mass Flow
N = Units Conversion Factor
C
d
= Discharge Coefficient
Y
1
= Gas Expansion Factor
E = Velocity of Approach Factor
d
2
= Bore of the Differential Producer
ρ=Density
DP = Differential Pressure
Q
m
NC
d
EY
1
d
2
DP ρ(){}
1
2
-
=