Emerson FB2100 Data Sheet

FB2100 Product Data Sheet

D301791X012 January 2021

Remote Automation Solutions

FB2100 Flow Computer

The FB2100 is a cost-effective low-power field mount flow
computer that measures and monitors oil and gas flow for a
differential or linear meter run.

The FB2100 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 simple configuration and ease of use, the cost
effective FB2100 flow computer focuses on metering
applications where control is not required. The FB2100
provides a full audit trail, including enhanced history, alarm
and event logs. The I/O options can be as simple as a single
discrete output (DO) for driving an odorizer or can be
expanded to give two user configurable analog (AI or AO)
channels and two user configurable discrete (DI, DO or PI)
channels. The FB2100 includes power options for remote
sites and flexible communication capabilities for both
remote and SCADA connected sites.

The new flow computers also come with the latest
RosemountTM multivariable measurement sensor
technology, providing high accuracy differential pressure
and static pressure measurement with long term stability to
help measurement confidence and production efficiency.

Features

The FB2100 flow computer includes the following key
features:

▪ Increased measurement confidence and reduced

measurement uncertainty

▪ Measurement and I/O capability focused on metering

applications

▪ 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 power and

communication options 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

▪ Simple selection of engineering units suits local

requirements

▪ Global Hazardous Area Approvals – Class 1 Div2, ATEX &

IECEx nA

▪ Corrosion resistant aluminum and fiberglass enclosure

options include radio mounting bracket and battery box
for solar use

▪ 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 and

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.

FB2100

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Firmware

The base firmware in the FB2100 flow computer measures
static pressure, differential pressure or pulse frequency, and
temperature for a single meter run. The flow computer
performs gas flow calculations based on those inputs in
either U.S., metric, or other user-selectable units based on
the calculation type.

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., Alt1, Alt2, and Alt3)
▪ 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:

▪ 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 analyser 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 for standard values
such as pressure, temperature, differential pressure or
frequency as well as meter run flow rates. In addition to
these standard alarms, the FB2100 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
capacity is 1000 metrology events and 1000 operation
events.

History

The FB2100 features expanded and flexible history capability
to ensure measurement confidence and meet the increasing
demands for secure data.

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The flow computer has four standard periodic logs available
providing hourly, daily, weekly, and monthly history. These
logs can contain up to 35 variables including flow weighted
average data, totals, and gas composition. For averaging,
the FB2100 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 FB2100 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
minute 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-compliant .cfx files through the
FBxConnect tool as well as calibration reports which contain
U.S. Bureau of Land Management specific parameters.

Power Options

You can power the FB2100 with an external DC power supply
or from an internal rechargeable battery linked to a solar
system. The internal battery can power the device for up to
45 days depending on the application.

Note: The internal battery option is available only with Class

1 Div 2.

Housing Options

The FB2100 has two housing options both suitable for
hazardous area installation. The corrosion resistant
Aluminum and the Fiberglass enclosures each protect the
electronics from physical damage and harsh environments.
The enclosures include a battery box to house a
rechargeable battery for use with solar systems and an
optional radio mounting bracket. The lockable door also
provides a viewing window for the optional LCD. The door
can also be fitted with an optional security switch, to
generate an alarm each time the door is opened.

Hazardous Area Certifications

The FB2100 has the following Global Hazardous Area
Approvals:

▪ North American certification for Class I Division 2 Groups

A, B, C and D.

▪ ATEX and IECEx certification for Ex nA, Zone 2 hazardous

locations.

Configuration Software

Emerson’s new FBxConnect™ tool is a Microsoft® Windows®-
based tool that enables you to easily monitor, configure,
service, and calibrate the FB2100 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 or
optionally through the FBxWifi wireless connection. For
more information, refer to product data sheet FBxConnect
(D301789X012).

Security

To secure your valuable process and data, the FB2100
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.

Monitor Screen

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DP Meter

Integral Pressure Sensor Options

The flow computer can be supplied with one of three sensor
options to suit your metering needs:

▪ Integral Multivariable Sensor (MVS) measuring both

Static Pressure and Differential Pressure (DP)

▪ Integral inline static pressure sensor
▪ NO integral pressure sensor – external transmitters are

used

The NO integral sensor option is typically used at locations
where regulations classify the location of the pressure
measurement sensor as either C1 D1 or ATEX/IEC Exd Zone

1. In this instance, the FB2100 without an integral sensor
can be mounted in the C1 D2 / Zone 2 area and be
connected via a serial port to a remote 4088B MVT
transmitter.

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.

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 FB2100 ensures 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 also 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 FB2100 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 FB2100
includes the following I/O points in the base unit:

▪ One discrete output (DO)
▪ One RTD/PRT (2-, 3-, or 4-wire)

The DO can be software configured as scaled pulse output,
latched, toggled, momentary, or timed duration output. The
solid state, normally open switch is rated at 500mA and is
often used to drive an odorizer.

Expansion I/O

The FB2100 can also be supplied with the following
expanded I/O:

▪ Integral pressure sensor
▪ Two analog channels – individually software selectable as

analog inputs (AI) or analog outputs (AO)

▪ Two discrete channels – individually software selectable

as either discreet inputs (DI), discrete outputs (AO) or
pulsed inputs (PI)

▪ One PRT/RTD (2-, 3-, or 4-wire)
▪ Two optional relays allow for additional loads up to

30Vdc at 6A. 24 Vdc power is required to energize the
relays.

Note: This option is available only with Class 1 Div 2

approval.

Analog Inputs (AI) are individually software configurable for
either 4 to 20mA 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 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.

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Communications

The FB2100 has three user selectable serial communications
ports with support for RS-232, RS-422, and/or RS-485
operation and one optional port that provides FBxWifi
(802.11 b/g) communications using DNP3 protocol:

▪ 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.

▪ COM4 –FBxWifi (802.11 b/g) communications (optional)

The FB2100 supports DNP3, Modbus slave (ASCII and RTU),
BSAP and ROC protocols on all serial ports.

Mounting Options

The FB2100 supports either direct mount to a manifold on
the pipeline, simple wall mounting or mounted on a two­inch pipe with the stainless steel pipe mounting kit.

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FB2100 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 variablesand 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)

Protocols

Serial ports support DNP3, Modbus slave (ASCII or RTU), BSAP, and ROC.
Wi-Fi supports DNP3
DNP3 includes level 3 protocol subset

Base I/O

The base FB2100 includes the following I/O:

▪ 1 multivariable or static pressure sensor
▪ 1 process temperature input (PRT/RTD)
▪ 1 discrete output (DO)

Expansion I/O (optional)

When the FB2100 is supplied with the expanded I/O option, the following options are available:

▪ 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)

Temperature Input
(RTD/PRT)

Type

2-wire, 3-wire, or 4-wire (software selectable)

Measuring Range

-200 to +850 °C (-328 to 1562 °F)

Reference
Accuracy

+/- 0.07 °C from -30 to 60 °C (±0.126 °F from -22 to +140 °F)
+/- 0.1 °C from -60 to 200 °C (±0.18 °F from -76 to 392 °F)

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Ambient
Temperature
Effect

−30 to 60°C

+/- 0.017 °C per 10 °C (+/- 0.03 °F per 18 °F) from the
calibration temperature

−60 to 200°C

+/- 0.034 °C per 10 °C (+/- 0.06 °F per 18 °F) from the
calibration temperature

Calculation Type

User selectable
between:

Callendar–Van Dusen

IEC 751/DIN 43760 (α 0.00385/°C)

IEC (α 0.003920/°C)

Resolution

24 bits

Scan Rate

1 second

Voltage Input
Impedance

Greater than 3 MΩ DC
Excitation Current

205 µA

Surge Suppression

36 Vdc

Common Mode
Rejection

100 dB at DC

Normal Mode
Rejection

100 dB at 50/60 Hz

Relays (Optional)

Provides two relays inside the flow computer enclosure.
Note: This option is available only with Class 1 Div 2 approval.

I/O Specifications

Analog Inputs

Type

Single-ended

Input Range

1 to 5 Vdc or 4 to 20 mA (software selectable)

Over Range

1 to 5 Vdc

0.8 to 5.2 Vdc

4 to 20 mA

3.2 to 20.8 mA

Resolution

16 bits

Scan Rate

10 samples per second

Input Impedance

1 to 5 Vdc
Inputs

200 kΩ

4 to 20 mA
Inputs

250 Ω
Fault Mode

User-entered default value or last good value

Software Filter

Software damping is available in FBxConnect configuration software

Input Filter

20 HZ @ -3 dB

Surge Suppression

30 Vdc

Reference
Accuracy

+/- 0.05% of span

Note: To achieve the stated accuracy when analog inputs are used in voltage mode, you

must wire analog input reference(s) to the AGND terminals separately from the
discrete and communication ground references.

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Ambient
Temperature
Effect

+/- 0.05% of span per 10°C (18°F) from the calibration temperature
Long Term
Stability

3 years
SNR

87 dB

Loop Power

External

Analog Outputs

Type

Single-ended, externally sourced

Output Range

4 to 20 mA

Resolution

14 bits

Surge Suppression

30 Vdc

Reference
Accuracy

+/- 0.1% of span

Note: To achieve the stated accuracy when analog outputs are used in voltage mode,

you must wire analog output reference(s) to the AGND terminals separately from
the discrete and communication ground references.

Ambient
Temperature
Effect

+/- 0.05% of span per 10°C (18°F) from the calibration temperature
Long Term
Stability

3 years
Fault Mode

User-entered default value or last good value

Scan Rate

1 second

Surge Suppression

30 Vdc

Impedance

Current Mode

Configured to drive a load impedance of 0 to 900 Ω

Voltage Mode

100 kΩ

Load Loop
Resistance

0 to 900 Ω

Max External
Supply

30 Vdc
Loop Power

External

Discrete Inputs

Type

Dry contact or an open collector

Scan Rate

1 second

Input Filter

10 Hz

Input Current

Software selectable 66µA or 2mA

Voltage Rating

30 Vdc maximum

Frequency

10 Hz maximum

Input Type

Latched or unlatched

Loop Power

Internally sourced

Surge Suppression

30 Vdc

Fault Mode

User-entered default value or last good value

Discrete Outputs

Type

Open drain

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Current

500 mA maximum

Operating Voltage
Range

30 Vdc maximum
Frequency

50 Hz maximum

Output Type

Latched, momentary, toggle, TDO, or scaled pulse

Surge Suppression

30 Vdc

Fault Mode

User-entered default value or last good value

Notes:

Discrete outputs are rated to 500mA maximum. In a small number of applications, however, the load on the DO
could have an effect on the uncertainty of the analog inputs and outputs. The typical increase in uncertainty is
around 0.05% and only occurs when all of the following are true:

• Either of the two analog channels is used as an AI (in voltage mode) or as an AO and

• Either of the two discrete channels is used as a DO and

• The total current load on these two DOs is greater than 300mA

Analog inputs in current mode are not affected.

Pulse Inputs

Type

Dry contact or open collector

Frequency

Low Range

0 to 300 Hz

High Range

0 to 10.5 kHz

Input Filter

Low Frequency

1 ms software selectable filter

High Frequency

30 µs software selectable filter

Input Current

Software selectable 66 µA or 2 mA

Voltage Rating

30 Vdc maximum

Loop Power

Internally sourced

Surge Suppression

30 Vdc

Relay Option

SPDT Relay

Internally
mounted

Quantity

2

(Relays each require a digital output from the flow computer)

Input

24 Vdc
(24 Vdc is required to energize relays)

Contact Rating

0 to 30 Vdc
Maximum Current 6A

Note: This option is available only with Class 1 Div 2 approval.

Integral Sensors

The FB2100 is available with the following integral sensor options:

▪ Multi-Variable Sensor – providing differential pressure and static pressure
▪ Static Pressure Sensor – providing static pressure only
▪ No integral sensor fitted – with interface to Rosemount™ 4088B MVT transmitters or analog transmitters

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Multivariable Sensor (optional)

The standard Rosemount™ MultiVariable™ sensor has a stainless steel coplanar flange, a stainless steel (316L) diaphragm, and
silicone fill fluid. Optional versions include:

▪ A Hastelloy

®

C-276 sensor diaphragm, a Hastelloy C-276 coplanar flange, with either NACE MRO175/ISO 15156 or

MRO103 certification

▪ Stainless steel traditional flange, a stainless steel diaphragm, and silicon fill fluid.

Differential Pressure
Input

DP Range 1

−25 to 25 Inches H2O (−62.16 to 62.16 mbar)

Reference Accuracy

± 0.1% span;
For spans less than 5:1, ± (0.025+0.015 [USL/Span]) % span

Stability

±0.2% USL for 1 year

Ambient
Temperature Effect
per 50°F (28°C)

from 1:1 to
30:1

± (0.2% USL + 0.25% span)

from 30:1
to 50:1

± (0.24% USL + 0.15% span)

Static Pressure
Effects

Zero Error

± 0.25% USL per 1000 psi (69 bar)

Span Error

± 0.4% USL per 1000 psi (69 bar)

Over Pressure Limit

SP Range 3

2000 psi (137.89 bar)
Burst Pressure Limit

10,000 psi (689.47 bar)

Notes:

▪ 25-inch sensor is only available with static pressure SP Range 3, maximum

pressure limited to 2000 psi.

▪ 25-inch sensor is only available with stainless steel sensor & coplanar flange.

DP Range 2:
Standard

0 to 250 Inches H2O (623 mbar)

Reference
Accuracy

± 0.1% span;
For spans less than 10:1, ± (0.01 [USL/Span]) % span

Stability

±0.1% USL for 1 year

Ambient
Temperature
Effect per 50°F
(28°C)

from 1:1 to
30:1

± (0.15% USL)

from 30:1 to
50:1

± (0.20% USL)

Static Pressure
Effects

Zero Error

± 0.1% USL per 1000 psi (69 bar)
For Static Pressures above 2000 psi:
± [0.2 + 0.0001 * (Ps - 2000)] % per 1000 psi

Span Error

± 0.2% USL per 1000 psi (69 bar)

Over Pressure
Limit

SP Range 1

1600 psi (110.32 bar)

SP Range 2

3626 psi (250.00 bar)

SP Range 3

3626 psi (250.00 bar)

Burst Pressure
Limit

10,000 psi (689.47 bar)

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Note: 0.1% Accuracy is not available on traditional flange.

DP Range 2:
Enhanced

0 to 250 Inches H2O (623 mbar)

Reference
Accuracy

± 0.075% span;
For spans less than 10:1, ± (0.025 +0.005 [USL/Span]) % span

Stability

±0.125% USL for 5 years;
For ±50 °F (28 °C) temperature changes, up to 1000 psi (68.9

bar) line pressure

Ambient
Temperature
Effect per 50°F
(28°C)

± (0.0175% USL + 0.1% span) from 1:1 to 5:1,
± (0.035% USL + 0.125% span) from 5:1 to 100:1

Static Pressure
Effects

Zero Error

± 0.05% USL per 1000 psi (69 bar)
For Static Pressures above 2000 psi:
± [0.1 + 0.0001 * (Ps - 2000)] % per 1000 psi

Span Error

± 0.2% USL per 1000 psi (69 bar)

Over Pressure
Limit

SP Range 1

1600 psi (110.32 bar)

SP Range 2

3626 psi (250.00 bar)

SP Range 3

3626 psi (250.00 bar)

Burst Pressure
Limit

10,000 psi (689.47 bar)

DP Range 3:
Standard

0 to 1000 Inches H2O (2.5 bar)

Reference
Accuracy

± 0.1% span;
For spans less than 10:1, ± (0.01 [USL/Span]) % span

Stability

±0.1% USL for 1 year

Ambient
Temperature
Effect per 50°F
(28°C)

from 1:1 to
30:1

± (0.15% USL)

from 30:1 to
50:1

± (0.20% USL)

Static Pressure
Effects

Zero Error

± 0.1% USL per 1000 psi (69 bar)
For Static Pressures above 2000 psi:
± [0.2 + 0.0001* (Ps - 2000)] % per 1000 psi

Span Error

± 0.2% USL per 1000 psi (69 bar)

Over Pressure
Limit

SP Range 2

3626 psi (250.00 bar)

SP Range 3

3626 psi (250.00 bar)

Burst Pressure
Limit

10,000 psi (689.47 bar)

Notes:

▪ 0.1% Accuracy is not available on traditional flange.
▪ 1000" DP range with 0.1% accuracy only available with stainless steel sensor

and coplanar flange.

▪ 1000" DP range is not available with 300 psi static pressure (SP Range 1).

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DP Range 3:
Enhanced

0 to 1000 Inches H2O (2.5 bar)

Reference
Accuracy

± 0.075% span;
For spans less than 10:1, ± (0.025 +0.005 [USL/Span]) % span

Stability

±0.125% USL for 5 years;
For ±50 °F (28 °C) temperature changes, up to 1000 psi (68.9 bar)

line pressure

Ambient
Temperature
Effect per 50°F
(28°C)

± (0.0175% USL + 0.1% span) from 1:1 to 5:1,
± (0.035% USL + 0.125% span) from 5:1 to 100:1

Static Pressure
Effects

Zero Error

± 0.05% USL per 1000 psi (69 bar)
For Static Pressures above 2000 psi:
± [0.1 + 0.0001* (Ps - 2000)] % per 1000 psi

Span Error

± 0.2% USL per 1000 psi (69 bar)

Over Pressure
Limit

SP Range 2

3626 psi (250.00 bar)

SP Range 3

3626 psi (250.00 bar)

Burst Pressure
Limit

10,000 psi (689.47 bar)
Note: 1000" DP range is not available with 300 psi static pressure (SP Range 1).

Static Pressure Input

The following details are for the static pressure measurement of the MultiVariable sensor

SP Range 1

Gauge

−14.2 to 300 psig (−0.98 to 20.68 bar)

Absolute

0.5 to 300 psia (0. 03 to 20.68 bar)

Reference Accuracy

Standard

± 0.1% span;
For spans less than 5:1, ± [0.017 (USL/Span)] %

span

Enhanced

± 0.075% span;
For spans less than 5:1, ±[0.013(USL/Span)] %

span

SP Range 2

Gauge

−14.2 to 1500 psig (−0.98 to 103.42 bar)

Absolute

0.5 to 1500 psia (0.03 to 103.42 bar)

Reference Accuracy

Standard

± 0.1% span;
For spans less than 5:1, ± [0.017 (USL/Span)] %

span

Enhanced

± 0.075% span;
For spans less than 5:1, ±[0.013(USL/Span)] %

span

SP Range 3

Gauge

−14.2 to 3626 psig (−0.98 to 250.00 bar)
Note: When used with 25” H20 DP Sensor, maximum static

pressure is 2000 psi.

Absolute

0.5 to 3626 psia (0,03 to 250,00 bar)
Note: When used with 25” H20 DP Sensor, maximum static

pressure is 2000 psi.

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Reference Accuracy

Standard

± 0.1% span;
For spans less than 5:1, ± [0.017 (USL/Span)] %

span

Enhanced

± 0.075% span;
For spans less than 5:1, ±[0.013(USL/Span)] %

span

Stability

Standard Accuracy

±0.1% USL for 1 year

Enhanced Accuracy

±0.125% USL for 5 years

Ambient
Temperature
Effects per 28
°C (50 °F)

Standard Accuracy

± (0.175% USL) from 1:1 to 10:1,

± (0.225% USL) from 10:1 to 25:1

Enhanced Accuracy

± (0.050% USL + 0.125% span) from 1:1 to 10:1,
± (0.060% USL + 0.175% span) from 10:1 to 25:1

Static Pressure Sensor (optional)

The following section applies to the “In-Line” Integral Static Pressure sensor, without differential pressure, which would typically
be used with linear meters that provide a pulsed signal for flow.

These static pressure sensors are provided in stainless steel with a 1/2” – 14 NPT Female process connections.

Static Pressure Input

SP Range 1

Gauge

−14.7 to 150 psig (−1.01 to 10.34 bar)

Absolute

0 to 150 psia (0 to 10.34 bar)

SP Range 2

Gauge

−14.7 to 800 psig (−1.01 to 55.15 bar)

Absolute

0 to 800 psia (0 to 55.15 bar)

SP Range 3

Gauge

−14.7 to 4000 psig (−1.01 to 275.79 bar)

Absolute

0 to 4000 psia (0 to 275.79 bar)

Reference
Accuracy

Standard

± 0.1% span
For spans less than 10:1, ± (0.01 [USL/Span]) % span

Enhanced

± 0.075% span
For spans less than 10:1, ± (0.025 + 0.005 [USL / Span]) %

span

Stability

Standard

±0.1% USL for 1 year

Enhanced

±0.125% USL for 5 years

Ambient
Temperature
Effects per 28
°C (50 °F)

Standard

± (0.175% USL) from 1:1 to 30:1

± (0.225% USL) for 30:1 to 50:1

Enhanced

± (0.050% USL + 0.125% span) from 1:1 to 30:1

± (0.060% USL + 0.175% span) for 30:1 to 100:1

FB2100 January 2021

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Over Pressure
Limit

SP Range 1

1500 psi (103.42 bar)

SP Range 2

1600 psi (110.32 bar)

SP Range 3

6000 psi (413.69 bar)

Burst-Pressure
Limit

11000 psi (758.42 bar)

Power

External DC Power
Supply

10.5 Vdc to 30 Vdc external supply (Max power at 10 watts)

Optional Rechargeable
Lead Acid Battery

Internal mounted 10.5 Ah 12 Vdc battery
The battery can power the unit for up to 45 days without any solar charging depending on the

application, ambient temperature, and solar regulator type and can be charged by a suitable solar
panel and solar charge regulator/controller panel.

Note: This option is available only with Class 1 Div 2 approval

Solar Panel and
Regulator Options

Optional 30W 12 Vdc solar panel with built-in SunKeeper™ SK-6 regulator
With the SunKeeper SK-6 solar regulator the battery can power the unit without charging up to 32

days the depending on the application.
Optional internally mounted SunSaver SS-6-12 Vdc regulator
With the SunSaver S-6-12 solar regulator the battery can power the unit without charging up to 45

days depending on the application.

Note: These options are available only with Class 1 Div 2 approval

SRAM Battery

Lithium coin cell type BR2335 or BR2330
Typical battery life 5-7 years with power; 10,000 hours without power

Power Modes

To keep power consumption to a minimum, especially for remote sites, the FB2100 can run in two different power modes, low
and standard. The FB2100 normally runs in low power mode for standard metering applications.

When running in low power mode, the radio power control function is used to switch to standard power mode and enable the
serial ports. During communication periods, the unit uses the standard power mode and then automatically reverts to low power
mode when the communication period is over.

Note: Serial connection to a remote 4088B MVT can run in low power mode.
The local display and FBxWifi can be configured to switch off after a period of inactivity (configurable between 1 and 60 minutes)

or be permanently left on.
When running in low power mode, if you need to use more than the default number of data points for logging, consult the

Emerson FB2100 Flow Computer Instruction Manual (D301783X012) to determine the possible impact on power consumption.
The figures below are typical power values in mW measured at room temperature.

Low Power Mode

Base unit with integral multivariable DP and pressure sensor
and temperature measurement, single DO available

55 mW @ 12Vdc

Base unit with expanded I/O, integral multivariable DP, and
pressure sensor and temperature measurement, 2 discrete
and 2 analog channels available

67 mW @ 12Vdc

Additional Load
Options

Display and Backlight active

340 mW @ 12Vdc

FBxWifi

379 mW @ 12Vdc

FBxWifi and Display active

398 mW @ 12Vdc

DO active (1 Hz, 50:50 duty cycle, no
load)

12 mW @ 12Vdc

January 2021 FB2100

www.Emerson.com/FlowComputers 15

PI active (10KHz, 50:50 duty square
wave)

12 mW @ 12Vdc

Standard Power Mode

Base unit with integral multivariable DP and
pressure sensor and temperature measurement,
single meter run

240 mW @ 12Vdc

290 mW @ 24Vdc

Base unit with temperature measurement, (no
integral sensor) communicating to remote 4088
(externally powered), single meter run

220 mW @ 12Vdc

268 mW @ 24Vdc

Base unit with integral multivariable DP and
pressure sensor and temperature measurement, 2
discrete and 2 analog channels available, single
meter run

260 mW @ 12Vdc

313 mW @ 24Vdc
Base unit with temperature measurement, integral

static pressure sensor, and pulsed input, single
meter run

276 mW @ 12Vdc

330 mW @ 24Vdc

Additional Load
Options

Display and Backlight active

159 mW @ 12Vdc

188 mW @ 24Vdc
FBxWiFi

191 mW @ 12Vdc

202 mW @ 24Vdc

FBxWiFi and Display active

233 mW @ 12Vdc

245 mW @ 24Vdc

DO active (1 Hz, 50:50 duty
cycle, no load)

20 mW @ 12Vdc

23 mW @ 24Vdc

PI active (10KHz, 50:50 duty
square wave)

14 mW @ 12Vdc

15 mW @ 24Vdc

Physical

Aluminum Enclosure

Construction

Powder coat aluminum, with lockable door

Ingress Protection

IEC 60529 IP66 & NEMA 4X

Dimensions

356 mm H by 305 mm W by 152 mm D (14 in. H by 12 in. W by 6 in. D)

Mounting

2 In. pipe, direct manifold or panel mount

Wiring

Size 12 to 28 American Wire Gauge (AWG) (0.3 to 2mm diameter)

Wiring Access

2 conduit entry points, 3/4 in. NPT, 1 blanked 5/8” (16mm) hole

Weight

FB2100 with MVS coplanar flange sensor: 10.75 Kg (23.7 lb)

FB2100 with static pressure sensor: 9.98 Kg (22 lb)

FB2100 without sensor: 8.21 Kg (18.1 lb)

Internal battery: 3.28 Kg (7.23 lb)

Fiberglass Enclosure

Construction

Compression-molded fiberglass, with lockable door

Ingress Protection

IEC 60529 IP66 & NEMA 4X

Dimensions

356mm by 305mm by 152mm (12 in. by 10 in. by 6 in.)

Mounting

2-inch pipe, direct manifold, or panel mount

Wiring

Size 12 to 28 American Wire Gauge (AWG) (0.3 to 2mm diameter)

Wiring Access

2 conduit entry points, 3/4 in. NPT, 1 blanked 5/8” (16mm) hole

FB2100 January 2021

16 www.Emerson.com/FlowComputers

Weight

FB2100 with MVS coplanar flange sensor: 6.94 Kg (15.3 lb)

FB2100 with static pressure sensor: 6.17 Kg (13.6 lb)

FB2100 without sensor: 4.4 Kg (9.7 lb)

Internal battery: 3.28 Kg (7.23 lb)

HMI

20 characters per line; 4 lines in display.

Security Switch
(Optional)

Provides an alarm each time the enclosure door is opened.
Local Display (Optional)

Type

Backlight LCD display

Environmental

Operating Temperature

−40 °C to +80 °C (−40 °F to +176 °F) (see ambient temps in Approvals section)

Note: Please check Approvals section for any restrictions. The display exhibits increased response time and

decreased contrast at temperatures below –30 C (–22 F).

Storage Temperature

–40 to 85 °C (–40 to 185 °F)

Operating Humidity

5 to 95%, non-condensing

Conformal Coating

All boards are conformal coated with a coating that complies with ANSI/ISA 71.04 Class G3

environments.

Environmental Rating

Product conforms to ANSI/ISA 71.04 Class G3 environmental standards with all conduit openings

sealed.

Electro Magnetic
Compatibility

The following EMC Emissions and Immunity are evaluated per EMC directive 2014/30/EU. Harmonized
standards used:

EN 61326-2-3-2013 Immunity
EN 61326-1-2013 Emissions

Immunity

EN 61000-4-2 (Electro Static Discharge)
EN 61000-4-3 (Radiated Immunity) *
EN 61000-4-4 (Fast Transients)
EN 61000-4-5 (Surges)
EN 61000-4-6 (Conducted RF)
EN 61000-4-8 (Power Frequency Magnetic Field)
EN 61000-4-17 (Voltage Ripple)
EN 61000-4-29 (Voltage Dips and Interrupts)

*Meets CE compliance 10V/m industrial requirements (deviations < 1% span for RTD and Pressure readings in
addition to original specification)

Radiated Emissions

EN 550022 Class A

Vibration

2g over 10 to 150 Hz
1g over 150 to 200 Hz

Approvals

Product Markings for
Hazardous Locations

UL

Class I, Div 2 Groups A, B, C, D Hazardous Locations, Temperature Code T4

January 2021 FB2100

www.Emerson.com/FlowComputers 17

Ambient Temperature

Aluminum enclosure

-40 °C to +80 °C (−40 °F to +176 °F) (no battery)

-40 °C to +45 °C (−40 °F to +113 °F) (with
rechargeable lead acid battery)

Note 1

-40 °C to +60 °C (-40 °F to +140 °F) (with optional
relays)

Fiberglass housing

-35 °C to +80 °C (−31 °F to +176 °F) (no battery)

-35 °C to +45 °C (−31 °F to +113 °F) (with

rechargeable lead acid battery)

Note 1

-35 °C to +60 °C (-31 °F to +140 °F) (with optional

relays)

Note: Maximum ambient temperature for models with the internal SunSaver

SS-6-12 Vdc solar regulator is 60 °C (140 °F). However, the internal lead
acid battery is limited to +45 °C (+113 °F).

Evaluated per Approval
Standards

ANSI/ISA 12.12.01-2015
CSA C22.2 No. 213-15, 1st Ed
CSA C22.2 NO. 61010-1-12 3rd Ed.
UL61010-1 3rd Ed.

UL

ATEX Cert: DEMKO 16 ATEX 1579X
IECEx Cert: IECEx UL IECEx UL 16.0069X
Ex nA IIC T4 Gc

Ambient Temperature

II 3 G.

−25 to +55 °C (−13 to +131 °F)

Evaluated per Approval
Standards

Directive 2014/34/EU
EN 60079-0:2012+A11:2013
EN 60079-15:2010

Note: ATEX and IECEx approval requires the use of an external DC power

supply.

Miscellaneous
Approvals

Customs Union

TR CU 004/2011, TR CU 020/2011
Conforms to the requirements of the technical regulations of the Customs
Union

RoHS2

Device without integral MVS or SP Sensor:
RoHS (2) EU Directive 2011/65/EU

Device with integral MVS or SP Sensor:
RoHS (2) EU Directive 2011/65/EU: This product may be considered out-of­scope when used for the intended design purpose in a Large Scale Fixed
Installation (LSFI). Consult https://www.emerson.com/compliance for up-to­date product information.

RoHS

FB2100 January 2021

18 www.Emerson.com/FlowComputers

NEPSI China

National Supervision and Inspection Centre for Explosion Protection and Safety
of Instrumentation
Cert. No. GYJ17.1349X
Ex nA IIC T4 Gc

CCOE India

Chief Controller of Explosives
Approval No. A/P/HQ/MH/104/5883 (P420903)
Ex nA IIC T4 Gc

NMi

Report Number: NMi-1901499-02
API Chapter 21.1:2013 compliance for “Flow measurement using Electronics
Metering Systems – Electronic Gas Measurement” and independent
verification for natural gas properties and flow calculations

January 2021 FB2100

For customer service and technical support,
visit www.Emerson.com/SupportNet.

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Solutions. All rights reserved.

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accuracy, this publication shall not be read to include any warranty or guarantee, express or
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