Product Specification Sheet
00815-0100-4810, Rev AA
June 2005
Conditioning Orifice Plate Specification Guide
www.rosemount.com
Product Specification Sheet
00815-0100-4810, Rev AA
June 2005
Overview
This Product Specification sheet defines the
requirements for the Conditioning Orifice Plate
(COP). This Specification is also included for
Electronic Pressure Instruments when integrated
with the Conditioning Orifice Plate (COP) primary to
form complete flowmeters.
Vendor Requirements
The manufacturer of the COP shall be certified to the
international standard ISO 9001.
The vendor shall have the ability to pre-assemble the
COP primary with a pressure instrument
(transmitter), perform a leak-test and calibrate the
unit before shipping.
The vendor shall have the ability to provide technical
support for the COP primary element and the
pressure instrument.
When a pressure instrument is supplied with the
COP, each pressure instrument shall be individually
tested for accuracy using calibration equipment
traceable to NIST or an equivalent internationally
recognized authority.
Instrument Specifications
The COP shall perform within ± 0.5% to ± 0.75% of
discharge coefficient (dependant on conditioning
orifice beta size) and the vendor shall make
independent testing documentation available
demonstrating this performance.
The COP shall have the ability to accommodate
isolation valves and connections that are suitable for
connecting a pressure instrument.
All line sizes serviced by the COP shall be able to
accommodate a remote RTD.
Conditioning Orifice Plate
The COP shall consist of four symmetrical orifice
holes to allow flow separation independent of flow
rate, pressure or temperature. As a result, a flow
coefficient (Cd) shall be maintained over a wide
range of Reynolds numbers.
These products shall deliver accurate and repeatable
results when installed downstream of a variety of flow
disturbances, that normally cause measurement
errors in the flow process.
Materials
The primary element shall be available in 316
Stainless Steel, 304L Stainless Steel, Monel
Hastelloy
The COP shall be available for use with industry
standard flanges:
The COP material will be the same or equivalent to
that of the Flange Unions.
®
276 material types.
• ANSI B16.5 (FF, RF, RTJ)
• ANSI B16.36 Orifice Flange Unions
(FF, RF, RTJ)
• DIN EN.1092 (FF, RF)
• DIN 19214 Orifice Flange Unions (FF, RF)
®
and
Conditioning Orifice Type
The COP will be configured as either a Compact
Orifice Plate design or as an Orifice Plate design.
Both designs will have four symmetrical orifice holes
with a specific beta size depending on the process
application.
Compact Conditioning Orifice Plate
• Shall be of all-welded design
• Shall be capable of withstanding 1440 psig at
100°F (99 bar at 38°C)
• Shall be capable of installing between ANSI
Flange Unions
• Shall have a centering mechanism for
installation in center of pipe
• Shall be capable of direct mounting to the
pressure instrument
Conditioning Orifice Plate
• Shall be of Paddle type or Universal Type
• Shall be capable of withstanding 6000 psig at
100°F (408 bar at 38°C)
• Shall be capable of installing between Orifice
Flange Unions
Flowmeter Specifications
The vendor shall be able to supply the COP primary
integrated with the pressure instrument to create a
complete flowmeter.
• The vendor shall have the ability to provide a
flowmeter for both volumetric and mass flow
output.
2
Product Specification Sheet
00815-0100-4810, Rev AA
June 2005
Functional Specifications
• The pressure instrument shall have the
capability to be supplied as mounted directly
on the COP primary when the process
temperature is less than 450°F (232°C).
• Differential pressure instruments shall be
capacitance technology-based.
• The pressure instrument sensor shall be
hermetically sealed from the external
environment.
• The pressure instrument shall have built-in
transient protection.
Communication Specifications
• Communication with the flowmeter can occur
via a hand-held device.
• Digital communication with the flowmeter shall
be via open protocols (e.g. HART,
FOUNDATION
™
Fieldbus). Proprietary
protocols are not permitted.
• The flowmeter shall allow field upgrading of
communication protocols and the addition of
advanced instrument software functions
without changing the pressure sensor.
Software Specifications
• The flowmeter shall contain user definable low
flow cut-off functionality.
• The pressure instrument shall be able to fully
communicate with a Microsoft
®
Windows®
based instrument management software via
an open communication protocol.
• It shall be possible to store last calibration date
and next calibration due date in the pressure
instrument memory using a hand held
configurator. This information should be
available on Windows-based instrument
management software.
• All instruments shall retain original factory
calibration settings in a permanent memory. It
shall be possible to recall this calibration using
a hand-held communicator.
LCD Specifications
• The instrument indicator shall be LCD type. It
shall display the numeric value and also have
a 0-100% scale bar graph corresponding to
the analog output. It shall be possible to
configure the indicator to display more than
one parameter (pressure, scaled output); in
this case the display will toggle / scroll to show
all selected parameters. The indicator will
display all alarms and alerts.
Volumetric Output Flowmeters
A volumetric measurement is ideal for liquid fluid
types.
When the COP is integrated with a differential
pressure instrument for volumetric output, the
flowmeter shall perform as follows:
• Within ± 0.75% to ± 0.95% of flow rate,
dependant on beta size.
• The vendor shall make independent testing
documentation available demonstrating this
performance.
Functional Specifications
• Pressure instrument hardware / software
failure alarm shall be selectable as high, low,
or any user-defined value.
• The flowmeter shall have the ability to detect
impulse line plugging or should allow field
upgrading to include this by the addition of an
electronics card.
Software Specifications
• The flowmeter shall allow the digital output of
the pressure instrument to be scaled to any
user-defined unit (e.g 0-200 m
gallons/min).
• The flowmeter shall allow custom
user-entered digital alerts for both high and
low values for the pressure reading. This
digital alert will not affect the analog output.
• Flowmeters for custody transfer will have
hardware and software write protect security.
Hardware security will override software.
3
/hr, 0-9000
LCD Specifications
• It shall be possible to remote mount
electronics with a display up to 100 ft (30 m)
from the pressure sensor. These electronics
will allow full configuration of the instrument
via a hand-held communicator.
3
Product Specification Sheet
00815-0100-4810, Rev AA
June 2005
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:
1
-
Q
NCdEY1d2DP ρ(){}
=
m
2
Where,
Q
= Mass Flow
m
N = Units Conversion Factor
C
= Discharge Coefficient
d
Y
= Gas Expansion Factor
1
E = Velocity of Approach Factor
d
= Bore of the Differential Producer
2
ρ=Density
Rosemount and the Rosemount logotype are registered trademarks of Rosemount Inc.
HART is a registered trademark of the HART Communications Foundation.
OUNDATION fieldbus is a registered trademark of the Fieldbus Foundation.
F
Hastelloy is a registered trademark of Haynes International, Inc.
Monel is a registered trademark of E.I. du Pont de Nemours & Co.
All other marks are the property of their respective owners.
Emerson Process Management
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
¢00815-0100-4810¤
© 2005 Rosemount Inc. All rights reserved.
DP = Differential Pressure
Emerson Process Management Asia Pacific
Private Limited
1 Pandan Crescent
Singapore 128461
T (65) 6777 8211
F (65) 6777 0947
Enquiries@AP.EmersonProcess.com
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