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1.0 Oval Flowmeter Series 9900
1.1 Description
The Brodie 9900 Series Oval Flowmeter/
Transmitter with Smart Meter Manager (SMM) is
a very high accuracy, positive displacement meter
which utilizes microprocessor based electronics
to provide multivariable flow computation and
output for volumetric and mass measurement
requirements. It is designed for use in the
chemical, industrial, food and beverage,
pharmaceutical and hydrocarbon process
industries.
One of the most significant features of these
meters is their ability to handle both low and high
viscosity products with a low pressure drop
across the meter. They are supplied in a
compact, 3-piece design which uses both front
and rear flanges instead of the closed-end body
configuration found in traditional oval flowmeters.
Available sizes are 1/2" through 3".
“Smart Meter Manager inside” best defines the
Brodie 9900 Oval Flowmeter/Transmitter. Past
products have only delivered simple square
wave pulse outputs that represented raw
unfactored meter pulses (K-Factors).
K-Factors require additional processing by a
secondary piece of electronics to convert to
engineering units or factored 4-20 mA analog
output. The need for secondary electronics,
additional wiring and power supplies can be
eliminated by using the SMM. The Smart Meter
Manager (SMM) is a multivariable flow computer
that fits inside the standard Brodie UMB
(Universal Mounting Box). Because the SMM
only requires 4-20 mA loop power it hooks up as
a simple 2-wire transmitter. The SMM expands
the capability of the Oval to include factored 2-
wire, 4-20 mA output, and with ATC (Automatic
Temperature Compensation) the once simple K-
Factor now represents both corrected volume
and mass flow. This can be in the form of a 4-20
mA output, gross total and/or inventory total. In
addition, transistor contacts provide scaled pulse
outputs in both net and gross values. An
additional contact provides an alarm output. This
expanded capability is enhanced by HART’S
communications and the ability to use the
standard 275 HART Communicator.
Brodie Smart Meter Manager Technology
• 2-wire, loop-powered device for ease of wiring
and installation
• 4-20 mA analog output with Bell-202 modulated
HART communication channel
• User selectable 0% and 100% analog output
ranges with optional smoothing
• Flexible (mix & match) units of measure for
flowrates, totals, temperatures, densities, etc.
• User configurable, scalable pulse output for
various engineering units
• Comprehensive alarms for both process flow
and internal diagnostic checks
Flowmeters are supplied with the SMM mounted
with the explosion proof UMB enclosure.
• Capabilities include:
• Automatic Temperature Compensation
• Analog and Pulse Output to remote
instrumentation
• Diagnostic and System Alarms
• 2-Wire Mass or Volume Input
• Model 275 Hand-held Interface
1.2 Design Features - Oval Flowmeter
• 2-Wire loop powered flowmeter/transmitter
• 316 Stainless steel measuring unit
• Automatic temperature compensation
• Pocketless measuring chamber
• Low pressure drop
• 2-Wire Mass or volume output
• 4-20 mA analog output with HART
communication
• User configurable, scalable pulse output
• Comprehensive alarms for both process flow
and internal diagnostic checks
• Easy access programming
• 10-Point meter factor linearization
• Class I, Division 1, Groups C & D; Class II,
Division 1, Groups E, F & G; Type 4
Weatherproof
• Intrinsically safe
1.3 Principle of Operation - Oval
Flowmeter
The Oval Flowmeter accurately measures liquid
flow by using a slight pressure differential to
rotate a pair of oval gears located within the
measuring chamber. Each complete rotation of
the gears (rotors) displaces a fixed amount of
liquid from the inlet to the outlet of the meter in a