Emerson FB1200 Product Data Sheet
FB1200 Product Data Sheet
D301790X012 January 2021
Remote Automation Solutions
FB1200 Flow Computer
The FB1200 flow computer measures and controls oil and
gas flow for up to two differential pressure or linear meter
runs. With a rugged housing and multiple I/O,
communications, and power options, the FB1200 provides
accurate and reliable flow measurement in the harshest
conditions.
The FB1200 is part of Emerson’s new field mount flow
computer family that delivers a convenient approach to
remote oil and gas sites by addressing challenges to power,
safety, measurement reliability and accuracy.
Designed for simplified configuration and ease of use, the
FB1200 is also highly configurable and supports multiple
flow and fluid property calculations right out of the box. The
flexible design provides exactly what is required for each
application. The FB1200 can also be equipped with FBxWifi™
allowing you to configure the flow computer and retrieve
site data more safely than before.
The new flow computers also come with the latest
Rosemount™ sensor technology, providing high accuracy
differential pressure and static pressure measurement with
long term stability to help improve measurement
confidence and production efficiency.
Features
The FB1200 flow computer includes the following key
features:
▪ Increased measurement confidence, reduced
measurement uncertainty
▪ Industry leading differential and static pressure
measurement including 5-year stability
▪ High accuracy temperature measurement including
curve matching via the Callendar-Van Dusen equation
▪ Reduced need to re-calibrate resulting in less time spent
on site
▪ Simplified configuration and set-up with the
FBxConnect™ configuration software tool
▪ Flexible design with configurable I/O and communication
ports to meet site needs
▪ Standard firmware supports global calculations for
orifice, cone, Venturi, nozzle, conditioning orifice,
turbine, PD, Auto-Adjust and Coriolis
▪ Standard firmware supports Properties Calculations for
Natural Gas, Pure Gas, and Crude Oil
▪ Flexible PID control with override complimented by
configurable logic blocks and effects
▪ Simple selection of engineering units to suit local
requirements
▪ Global Hazardous Area Approvals – Class 1 Div 1 & 2,
ATEX & IEC Ex d & Ex nA
▪ FBxWifi allows secure local wireless access from safe area
▪ Ease of integration with support for Modbus, ROC, BSAP
and DNP3 protocols
▪ Enhanced security helps prevent unauthorized access
▪ Enhanced alarming and historical data storage, improved
audit trail
▪ Superior performance gives better control of your
operations and maximizes profits
▪ API 21.1 compliant
FBxWifi™
The optional FBxWifi communications enables you to
connect your laptop or tablet to the flow computer through
a secure wireless connection. Once connected wirelessly,
you can use FBxConnect configuration software to view
process values, edit configuration parameters, and collect
logs stored in the flow computer – all from within the safe
area.
FB1200
Aluminum Housing
Stainless Steel Housing
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Firmware
The base firmware in the FB1200 flow computer comes with
all the calculations, features and functionality required to
provide consistent measurement with increased confidence
for gas metering and control. The flow computer measures
static pressure, differential pressure or pulse frequency, and
temperature for up to two meter runs.
The flow computer performs flow calculations based on the
following set of user selectable global calculations. To fully
satisfy local requirements the engineering units are fully user
selectable between either U.S. or metric, or a combination of
each.
The firmware supports the following flow calculations:
▪ AGA 3 1992/2013 (volume, mass/density, and
mass/relative density)
▪ ISO 5167 1991/1998/2003 (orifice, Venturi, and nozzle)
▪ Rosemount 405C Compact Orifice and 1595
Conditioning Orifice Plate
▪ McCrometer V-Cone
®
and Wafer Cone®
▪ NUFLO
™
Cone
▪ AGA 7 2006 (pulsed turbine, PD, and ultrasonic)
▪ AGA 11 2013 (Coriolis pulses)
▪ Auto-Adjust
™
meter
▪ AGA 9 (Multipath Ultrasonic)
▪ API 20.1 Liquid Allocation Measurement
▪ API 12.2 Calculation of Petroleum Quantities
The firmware supports the following property calculations:
▪ AGA 8 1994 (Detailed, Gross 1 and Gross 2)
▪ AGA8 2017 Part 1 and Part 2 (GERG 2008)
Note: AGA8 Part 2 / GERG provides support for the
following pure gases: Nitrogen, Carbon Dioxide,
Hydrogen, Oxygen, Carbon Monoxide, Water
Vapor, Hydrogen Sulfide, Helium, and Argon
▪ Speed of Sound calculated via AGA 10 and AGA 8 2017
Part 2
▪ NX-19 1962, MOD, VDI/VDE 2040
▪ ISO 12213 2009 (parts 2 and 3)
▪ SGERG 1991 (Std., Alt 1, Alt 2 and Alt 3)
▪ GPA 2172 2009 (including saturated vapor calculation)
▪ ISO 6976 1995 (Superior and Inferior, incorporating
Technical Corrigendum 2 [1997] and 3 [1999])
▪ API 11.1 Temperature and Pressure correction for Crude
Oils
The firmware accepts gas density, base density, and specific
gravity form any of the following sources:
▪ Up to 2 gas chromatographs (GC)
▪ Fixed value
▪ Periodic download from SCADA
▪ An external signal, such as analog input
▪ Calculated based on gas composition
The firmware includes the following flow rates and totals for
gas DP and gas linear meters:
▪ Indicated volume
▪ Corrected (standard) volume
▪ Mass
▪ Energy
▪ Integral Value (DP meter) or Pulse Totals (linear meter)
The firmware includes the following flow rates and totals for
API 12.2 and API 20.1 (low water):
▪ Indicated Volume / Mass
▪ Gross Volume
▪ Gross Standard Volume
▪ Net Standard Volume
▪ Water Volume
▪ Mass
▪ Flow time
▪ Pulses
The firmware includes the following flow rates and totals for
API 20.1 (high water):
▪ Indicated volume / mass
▪ Gross Volume
▪ Oil (Unshrunk and Theoretical Production)
▪ Natural Gas Liquid
▪ Flashed Gas
▪ Water (Uncorrected and Corrected Volume)
▪ Flow Time
▪ Pulses
Note: The firmware can accept a water cut from an online analyzer or from an off-line analyzer corrected to
metering conditions.
The firmware supports a fallback mode, when a process
variable's value is questionable. The fallback options can be
one of the following:
▪ Use last good value
▪ Use a fixed fallback value
Alarms and Events
The flow computer supports extensive alarming capability to
enhance operational efficiency and improve the audit trail.
Alarms are pre-allocated to meter runs and stations for
standard values such as pressure, temperature, differential
pressure or frequency as well as meter run and station flow
rates. In addition to these standard alarms, the FB1200
provides a number of user alarms that you can assign to
other database parameters simply by “filling in the blanks” in
user alarm templates in the FBxConnect configuration tool.
Storage is provided for the most recent 1000 alarms in the
Alarm log.
The Event log stores the significant events during operation
and can be configured to either store all events in a single log
of 2000 events or the user can select to store the
metrology/legal events in a separate log from the
operational events. With the latter option the event log
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capacity is 1000 metrology events and 1000 operation
events.
History
The FB1200 features expanded and flexible history capability
to ensure measurement confidence and meet the increasing
demands for secure data.
The flow computer has four standard periodic logs available
providing hourly, daily, weekly, and monthly history. These
logs can contain up to 60 variables including flow weighted
average data, totals, and gas composition. For averaging,
the FB1200 supports either flow weighted or flow
dependent which can be linear or formulaic.
For gas meter averages, you can choose between flowdependent linear per API Chapter 21.1 (2013) or flowdependent formulaic, flow-weighted linear, or flowweighted formulaic averages per API Chapter 21.1 (1993).
Liquid allocation meter averages are flow-weighted averages
per API Chapter 21.2 (2000).
The FB1200 can store the following:
▪ Hourly logs 62 days
▪ Daily logs 12 months
▪ Weekly logs 12 months
▪ Monthly logs 60 months
The flow computer also supports two user periodic logs, the
duration or period of each is user selectable between 1
second and 200 hours. The first user periodic logs include 10
parameters over 4,000 periods and the second contains 20
parameters over 500 periods.
The flow computer with FBxConnect provides pre-formatted
EFM reports for hours and days. The format of the reports
can be .csv, .pdf or secure pdf.
In addition to the above reports, the flow computers can
produce FLOWCAL-complaint. cfx files through the
FBxConnect tool as well as calibration reports which contain
U.S. Bureau of Land Management specific parameters.
Housing
The FB1200 includes an explosion-proof and flame-proof
enclosure made of die-cast aluminum or stainless steel that
can operate in an unprotected outdoor environment. Wiring
for I/O, communications, and power enters the enclosure
through the four conduit fittings. The front end cap provides
a viewing window for the optional LCD. The rear end cap
provides access to the screw terminals with connections for
communications, I/O, and power. The end caps provide the
ability to fit wire security seals.
Hazardous Area Certifications
The FB1200 has the following Global Hazardous Area
Approvals:
▪ North American certification for Class I Division 1 Groups
C and D (explosion proof) and Class I Division 2 Groups A,
B, C and D
▪ ATEX and IECEx certification for Exd Zone 1 (flame proof)
and Exn Zone 2 hazardous locations
Power Options
The FB1200 has the following power options available:
▪ External DC supply
▪ External DC supply with internal battery back-up
▪ Solar panel charging internal battery, unit has built-in
solar regulator
The internal battery can power the device under normal
operating conditions without charging for up to 19 days.
Note: Internal battery option is not available with ATEX or
IEC approval.
Configuration Software
Emerson’s new FBxConnect™ tool is a Microsoft® Windows®-
based tool that enables you to easily monitor, configure,
service, and calibrate the FB1200 flow computer. Designed
for ease of use, FBxConnect provides at-a-glance monitoring,
quick access to commonly performed tasks, and a guided
configuration process to quickly get your measurement up
and running.
The wizard-driven approach simplifies configuration and
ensures that you only need to enter the required data once.
Whether you are an experienced engineer or a new
technician, you can be confident configuration is done
correctly the first time.
FBxConnect runs on a Windows PC or tablet. You connect
securely to the flow computer using one of its serial ports,
Ethernet port, or optionally through the FBxWifi wireless
connection. For more information, refer to product data
sheet FBxConnect (part D301789X012).
Monitor Screen
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DP Meter
Security
To secure your valuable process and data, the FB1200
provides multi-level role-based access, user account
authentication, and password encryption.
The system administrator can set a minimum password
length (up to 20 characters) that accommodates lower case,
upper case, numbers, and symbols, as well as configure a
user lock-out feature that locks out invalid users after a
defined number of failed login attempts.
Integral Pressure Sensor Options
The flow computer can be supplied with one of three sensor
options to suit your metering needs:
▪ Integral Multivariable Transmitter (MVT) measuring both
Static Pressure and Differential Pressure (DP)
▪ Integral inline static pressure sensor
▪ NO integral pressure sensor – external transmitters are
used
If the FB1200 has an integral sensor, it can also
communicate with one remote 4088B transmitter. If it has
no integral sensor it can communicate with one or two
remote 4088B transmitters.
Enabled by superior sensor technology and engineered for
optimal flow performance, the integral pressure sensor on
the flow computer delivers unparalleled accuracy, over a
wide range of operating conditions and industry leading
stability to ensure you meet standards and regulations.
The pressure sensors on the flow computer can measure DPs
of up to 1000” of water / 2500 mBar and static pressures, up
to 4000 psi / 275 Bar in either gauge or absolute with
accuracies up to 0.075%.
Temperature Input (RTD/PRT)
With industry leading measurement accuracy, the
temperature measurement of the FB1200 will ensure that
you minimize your measurement uncertainty in all operating
conditions. The input accepts 2-, 3- or 4-wire connections
reducing any field wiring induced errors and supports sensor
curve matching utilizing the optional Callendar-Van Dusen
constants to define the unique characteristics of the
RTD/PRT to further improve process temperature
measurement uncertainty.
The FB1200 flow computer’s superior static pressure, DP,
and temperature measurement performance and stability
ensures you meet standards and regulations so you can
avoid fines, penalties, leaseholder disputes, and lost
revenue.
Inputs and Outputs
Base I/O
In addition to the integral pressure sensor, the FB1200
includes the following I/O points in the base un it:
▪ Two analog channels - individually software selectable as
analog inputs (AI) or analog outputs (AO)
▪ Two discrete channels - individually software selectable
as discrete inputs (DI), discrete outputs (DO), or pulse
inputs (PI)
▪ One RTD/PRT (2-, 3-, or 4 wire)
Analog Inputs (AI) are individually software configurable for
either 4 to 20 mA or 1 to 5 Vdc operation.
To keep measurement uncertainty at a minimum when
external transmitters are being used, both the AI and AO
channels have industry-leading measurement accuracy with
an excellent performance over a wide ambient temperature
range.
Each Discrete Input (DI) channel can also be software
configured to function as a latched DI.
The Discrete Output (DO) channels are solid-state, normally
open switches rated at 500 mA, enough to directly drive
most samplers. Each DO channel can be software configured
as a latched, toggled, momentary, timed duration output
(TDO), or scaled pulse output.
The PI channels are most commonly used to interface with
turbine meters, Coriolis meters, ultrasonic meters, and
positive displacement (PD) meters. The high-speed input
supports signal up to 10.5 kHz.
Expansion I/O (optional)
In addition to the base I/O provided, the optional 6-point I/O
board adds the following I/O capabilities to the FB1200:
▪ Two additional channels that are individually software
selectable as either analog inputs or analog outputs
▪ Four additional channels that are individually software
selectable as discrete inputs, discrete outputs, or pulse
inputs
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Control
The FB1200 optionally supports control functions including
PID control, basic programming through action blocks,
effects, and math blocks.
PID Control – The FB1200 supports up to three Proportional,
Integral, and Derivative (PID) control loops. Each PID
instance supports a primary and an override loop. Each loop
has its own user-defined input, output, and override
capability.
Typically, a PID control maintains a process variable at set
point. If you configure a PID override control, the primary
loop is normally in control of the control device but the
override loop can take over control of the process if required.
A typical example would be primary flow control with a
pressure override.
Action Blocks – The FB1200 supports up to 30 action blocks.
Action blocks are used in conjunction with effect blocks to
monitor a configured condition and to perform an action
(effect) when the logic is “true.” An action block consists of a
user defined Boolean logic statement with two variables.
These variables can either be live parameter values or
constants.
Multiple action blocks can be chained together to create
more complex logic. Each action block includes multiple
bypasses, which can temporarily halt the action to be taken
for maintenance and safety.
Effects – The FB1200 supports up to ten effects. Effects
cause an action to occur when the result of one or more
action blocks is active (“true”). Multiple action blocks can
cause the same effect, such as shutting a valve or enabling
an alert beacon.
You configure an effect by defining an output parameter and
the values to write to that parameter when the effect is
either active or inactive. You can also configure an active
effect to be self-clearing or to require a manual reset.
Math Blocks – The FB1200 supports up to ten math blocks.
Math blocks perform mathematical equations using userdefined variables as inputs. Each math block consists of up to
four user-defined variables, three mathematical calculations,
and the results of each calculation.
The result of the math block equation can be assigned to a
user data point, to drive an output point, to a calculated
value or to any other database parameter. Mathematical
calculations also support standard math functions (POW,
EXP, LOG, SQRT, etc.), constants, and operators.
FBxConnect checks each calculation string for the correct
syntax and uses double precision floating point math
throughout the calculation.
User Data Points
User data points are configurable storage areas in the data
base. These user data points can store the constants /
variables that are inputs to the math blocks in addition to the
calculated results of math blocks. They can also be used to
represent interim calculation values or values of additional
inputs or outputs etc. There are eight user data instances,
each with a tag and description, 30 integers (split between
byte, short and long), 20 single floating points, and 10
double floating points, providing storage for up to 480
variables.
Communications
The FB1200 provides up to five user-selectable
communications ports: three serial ports, one Ethernet port,
and one optional port that supports FBxWifi (802.11 b/g)
communications using DNP3 protocol.
▪ COM1 – 4-wire serial communications. Software
selectable for EIA-232 (RS-232), EIA-422 (RS-422), or EIA-
485 (RS-485) operation.
▪ COM2 – 2-wire serial communications. Software
selectable for EIA-232 (RS-232) or EIA-485 (RS-485)
operation.
▪ COM3 – 2-wire serial communications. Software
selectable for EIA-232 (RS-232) or EIA-485 (RS-485)
operation.
▪ COM4 –FBxWifi (802.11 b/g) communications
(optional).
▪ COM5 – Ethernet. 10/100BASE-T twisted pair. Supports
up to seven sessions.
The FB1200 supports multiple communications protocols,
including DNP3, Modbus master and slave (ASCII and RTU),
BSAP, and ROC on the three serial ports and DNP3 on the
FBxWifi port. In addition, the Ethernet port supports Modbus
over TCP/IP protocol (master and slave), DNP3/IP, ROC, and
BSAP.
FBxNet
FBxNet is a secure, easily configurable, peer-to-peer
communication network for exchanging data between
Emerson FB3000 RTUs and FB1200 and FB2200 flow
computers over an Ethernet connection. FBxNet supports
subscriber and publisher devices, where publishers provide
data to their subscribers. The FB3000 RTUs and FB1200 and
FB2200 flow computers can be publishers; only an FB3000
can be a subscriber. For more information, refer to FBxNet
product data sheet (part D301905X012).
Mounting Options
The FB1200 supports either direct mount to a manifold on
the pipeline or indirect mounting on a two-inch pipe or pole.
A mounting bracket and bolts are available for use with a
traditional flange, coplanar flange, or inline static pressure
options.
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FB1200 Flow Computer
CPU Module
Processor
The central processing unit (CPU) of the flow computer is an NXP® Kinetis® K61 series CPU with an
ARM® Cortex® M4 processor.
Memory
SRAM
8 MB, holds current states of all variables and historical archives.
Flash
128 MB, holds firmware image and configuration files.
Clock
Type
Real-time clock
Accuracy
0 °C to 40 °C
60 seconds/year
-40 °C to 80 °C
110 seconds/year
Watchdog Timer
1175 milliseconds
Diagnostics
Battery voltage monitor, external voltage monitor, SRAM battery status
Communications
Ports
COM1
4-wire serial communications.
Software selectable for RS-232, RS-422, or RS-485 operation.
COM2
2-wire serial communications.
Software selectable for RS-232 or RS-485 operation.
COM3
2-wire serial communications.
Software selectable for RS-232 or RS-485 operation.
Can communicate to 4088B transmitters.
COM4
FBxWifi (optional) 802.11 b/g
COM5
Ethernet 10/100 Base-T supports up to 7 sessions (1 Modbus Master, up to 3
DNP3, others selectable between ROC, BSAP, and Modbus Slave)
Protocols
Serial ports support DNP3, Modbus slave (ASCII or RTU), BSAP, and ROC.
The Ethernet port supports Modbus over TCP/IP protocol (master and slave), DNP3, BSAP, and ROC
protocol.
Wi-Fi supports DNP3
DNP3 includes level 3 protocol subset
Base I/O
The base FB1200 includes the following I/O:
▪ 2 channels that are individually software selectable as either analog inputs or analog outputs
▪ 2 channels that are individually software selectable as either discrete inputs, discrete outputs, or pulse inputs
▪ 1 process temperature input (RTD/PRT)
Expansion I/O (optional)
6 Channel I/O Board
Provides 6 additional I/O channels in addition to the base I/O.
Note: Specifications for expansion I/O channels are identical to base I/O channels except where
noted.
Analog Inputs /
Analog Outputs
Quantity
2 channels
Each channel is individually software selectable as an AI or AO.
Discrete Inputs /
Discrete Outputs /
Pulse Inputs
Quantity
4 channels
Each channel is individually software selectable as a DI, DO, or
PI.
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