Emerson FB1200 Instruction Manual
Emerson FB1200 Flow Computer Instruction Manual
Emerson FB1200 Flow Computer
Instruction Manual
D301782X012
November 2020
Remote Automation Solutions
Emerson FB1200 Flow Computer Instruction Manual
D301782X012
November 2020
Device Safety Considerations
Reading these Instructions
Before operating the device, read these instructions carefully and understand their safety implications. In some situations,
improperly using this device may result in damage or injury. Keep this manual in a convenient location for future reference.
Note that these instructions may not cover all details or variations in equipment or cover every possible situation regarding
installation, operation, or maintenance. Should problems arise that are not covered sufficiently in the text, immediately
contact Customer Support for further information.
Protecting Operating Processes
A failure of this device – for whatever reason -- may leave an operating process without appropriate protection and could result
in possible damage to property or injury to persons. To protect against this, you should review the need for additional backup
equipment or provide alternate means of protection (such as alarm devices, output limiting, fail-safe valves, relief valves,
emergency shutoffs, emergency switches, etc.). Contact Remote Automation Solutions for additional information.
Returning Equipment
If you need to return any equipment to Remote Automation Solutions, it is your responsibility to ensure that the equipment
has been cleaned to safe levels, as defined and/or determined by applicable federal, state and/or local law regulations or
codes. You also agree to indemnify Remote Automation Solutions and hold Remote Automation Solutions harmless from any
liability or damage which Remote Automation Solutions may incur or suffer due to your failure to ensure device cleanliness.
Grounding Equipment
Ground metal enclosures and exposed metal parts of electrical instruments in accordance with OSHA rules and regulations as
specified in Design Safety Standards for Electrical Systems, 29 CFR, Part 1910, Subpart S, dated: April 16, 1981 (OSHA rulings are
in agreement with the National Electrical Code). You must also ground mechanical or pneumatic instruments that include
electrically operated devices such as lights, switches, relays, alarms, or chart drives.
Important: Complying with the codes and regulations of authorities having jurisdiction is essential to ensuring personnel
safety. The guidelines and recommendations in this manual are intended to meet or exceed applicable codes and regulations.
If differences occur between this manual and the codes and regulations of authorities having jurisdiction, those codes and
regulations must take precedence.
Protecting from Electrostatic Discharge (ESD)
This device contains sensitive electronic components which be damaged by exposure to an ESD voltage. Depending on the
magnitude and duration of the ESD, it can result in erratic operation or complete failure of the equipment. Ensure that you
correctly care for and handle ESD-sensitive components.
System Training
A well-trained workforce is critical to the success of your operation. Knowing how to correctly install, configure, program,
calibrate, and trouble-shoot your Emerson equipment provides your engineers and technicians with the skills and confidence
to optimize your investment. Remote Automation Solutions offers a variety of ways for your personnel to acquire essential
system expertise. Our full-time professional instructors can conduct classroom training at several of our corporate offices, at
your site, or even at your regional Emerson office. You can also receive the same quality training via our live, interactive
Emerson Virtual Classroom and save on travel costs. For our complete schedule and further information, contact the Remote
Automation Solutions Training Department at 800-338-8158 or email us at education@emerson.com.
Ethernet Connectivity
This automation device is intended to be used in an Ethernet network which does not have public access. The inclusion of this
device in a publicly accessible Ethernet-based network is
ii Contents
not recommended.
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Contents
Section 1. Introduction 1
1.1 Safety Labels ........................................................................................................................................... 3
1.2 Features .................................................................................................................................................. 3
1.3 FB1200 Flow Computer Models ............................................................................................................... 4
FB1200 Flow Computer (with Multi-variable or Static Pressure Sensor) ........................................ 4
1.3.1
1.3.2 FB1200 Flow Computer (without Integral Sensor) ....................................................................... 5
1.4 Central Processing Unit (CPU) .................................................................................................................. 5
1.4.1 Memory ...................................................................................................................................... 5
1.5 Explosion-proof Enclosure ....................................................................................................................... 5
1.5.1 Physical Security .......................................................................................................................... 6
1.6 I/O ........................................................................................................................................................... 7
1.7 Power Options......................................................................................................................................... 7
1.8 Communications ..................................................................................................................................... 8
1.9 Human-Machine Interface (HMI) Module ................................................................................................. 8
1.10 FBxWifi™ Communications ..................................................................................................................... 9
1.11 Software Tools ...................................................................................................................................... 10
1.12 RoHS2 Compliance ................................................................................................................................ 10
Section 2. Installation 11
2.1 Hazardous Locations ............................................................................................................................. 11
2.2 Environmental Specifications ................................................................................................................ 11
2.3 Required Tools ...................................................................................................................................... 12
2.4 Site Considerations ............................................................................................................................... 12
2.5 General Wiring Guidelines ..................................................................................................................... 15
2.6 Front or Rear End Caps .......................................................................................................................... 15
2.6.1 Removing/Replacing Retaining Clamp on End Caps ................................................................... 16
2.6.2 Removing the Front or Rear End Caps ........................................................................................ 17
2.6.3 Replacing the Front or Rear End Caps......................................................................................... 18
2.7 Mounting the Enclosure ........................................................................................................................ 18
2.7.1 Bolting Considerations .............................................................................................................. 18
2.7.2 O-rings with Flange Adapters..................................................................................................... 20
2.7.3 Direct Mount ............................................................................................................................. 21
2.7.4 Indirect Mount .......................................................................................................................... 21
2.7.5 Rotating the Housing ................................................................................................................ 24
2.8 Grounding the Device ........................................................................................................................... 26
2.9 Terminal Plate ....................................................................................................................................... 27
2.10 Power Modes ........................................................................................................................................ 28
2.10.1 Low Power Mode ....................................................................................................................... 28
2.10.2 Standard Power Mode ............................................................................................................... 30
2.10.3 Notes on Battery Life ................................................................................................................. 31
2.11 Connecting Power ................................................................................................................................. 31
2.11.1 Connecting DC Power ............................................................................................................... 32
2.11.2 Connecting Battery Power ......................................................................................................... 33
2.12 Installing the Optional Solar Panel ......................................................................................................... 34
2.12.1 Attaching Mounting Hardware to the Solar Panel ...................................................................... 34
2.12.2 Mounting the Solar Panel (Integral Mount) ................................................................................ 36
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2.12.3 Mounting the Solar Panel (Remote Mount) ................................................................................ 38
2.12.4 Connecting Solar Power ............................................................................................................ 39
2.12.5 Adjusting the Optional Solar Panel Tilt Angle ............................................................................. 40
2.13 Connecting Communication Ports ......................................................................................................... 41
2.13.1 Connecting to COM1 ................................................................................................................. 41
2.13.2 Connecting to COM2 and COM3 ............................................................................................... 44
2.13.3 Ethernet Port ............................................................................................................................. 49
Section 3. I/O Configuration and Wiring 51
3.1 Analog Inputs ........................................................................................................................................ 55
3.1.1 AI Wiring ................................................................................................................................... 55
3.2 Analog Outputs ..................................................................................................................................... 59
3.2.1 AO Wiring ................................................................................................................................. 59
3.3 Digital Inputs ......................................................................................................................................... 61
3.3.1 DI Wiring ................................................................................................................................... 62
3.4 Digital Outputs ...................................................................................................................................... 64
3.4.1 DO Wiring ................................................................................................................................. 65
3.5 Pulse Inputs ........................................................................................................................................... 67
3.5.1 PI Wiring ................................................................................................................................... 67
3.6 Connecting the RTD .............................................................................................................................. 69
3.7 Connecting a Rosemount 4088B Transmitter for Use in a Second Meter Run ......................................... 72
Section 4. Operation 75
4.1 Powering Up/Powering Down the Device .............................................................................................. 75
4.2 Establishing Communications ............................................................................................................... 75
4.2.1 Communicating with the SCADA Host ....................................................................................... 75
4.2.2 Communicating with a Laptop Using One of the Serial Ports ...................................................... 76
4.2.3 Communicating with a Laptop Using Ethernet ........................................................................... 76
4.2.4 Communicating with a Laptop Wirelessly with FBxWifi .............................................................. 77
4.3 Communicating using the HMI Module ................................................................................................. 78
Section 5. Service and Troubleshooting 81
5.1. Returning the Unit for Repairs ............................................................................................................... 82
5.2. Interpreting the Status LEDs .................................................................................................................. 83
5.3. Switch and Buttons ............................................................................................................................... 85
5.4. Removing/Replacing the HMI Module ................................................................................................... 85
5.5. Replacing the Main Battery Pack ............................................................................................................ 86
5.6. Removing/Replacing the SRAM Battery ................................................................................................. 88
5.7. Upgrading System Firmware ................................................................................................................. 90
Appendix A. Special Instructions for Class I Division 2 Locations 91
Appendix B. Special Instructions for Class I Division 1 Locations 95
Appendix C. ATEX Non-Sparking Zone 2 Certifications 99
Appendix D. ATEX Flame-Proof Zone 1 Certifications 101
Index 103
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Contents v
Section 1: Introduction
This section covers the following topics:
Safety Labels
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Features
FB1200 Flow Computer Models
Central Processing Unit (CPU)
Explosion-proof Enclosure
I/O
Power Options
Communications
Human-Machine Interface (HMI) Module
FBxWifi™ Communications
Software Tools
RoHS2 Compliance
The Emerson FB1200 Flow Computer supports measurement for one or two meter runs. This
manual describes how to install and configure the Emerson FB1200 Flow Computer hardware.
For information on using the FBxConnect
accompanies FBxConnect.
™
configuration software, see the online help that
Introduction 1
Emerson FB1200 Flow Computer Instruction Manual
1
HMI module
2
Front end cap (cover)
3
Data plate
4
Rear end cap (cover)
5
Conduit fittings
6
Enclosure
7
Sensor module
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Figure 1-1: FB1200 Flow Computer
2 Introduction
1.1 Safety Labels
DANGER
WARNING
CAUTION
SAFETY FIRST
This product may display safety label(s) to identify potential hazards. The same types of notices
appear within the documentation. Whenever you see an exclamation point (!) enclosed within a
triangle (shown to the left), consult the documentation for additional safety information about the
hazard and how to avoid it. The labels used are :
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MAY CAUSE DEATH
Observe all precautionary signs posted on the equipment.
Failure to do so may result in death or serious injury to personnel.
DANGER TO PERSONNEL AND EQUIPMENT
Observe all precautionary signs posted on the equipment.
Failure to do so may result in injury to personnel or cause damage to the equipment.
MAY CAUSE INJURY TO PERSONNEL OR DAMAGE EQUIPMENT
Observe all precautionary signs posted on the equipment.
Failure to do so may result in injury to personnel or cause damage to the equipment.
1.2 Features
Introduction 3
General instructions and safety reminders.
The FB1200 Flow Computer includes the following key features:
Enclosure suitable for use in Class I Division 1 explosion proof and Ex db Zone 1 flame- proof
environments
Enclosure suitable for use in Class I Division 2 non-incendive and Ex nA Zone 2 non- sparking
environments
Integral multi-variable sensor for measurement of Pressure (P) and Differential Pressure (DP)
Connections for customer-supplied resistance temperature detector (RTD) for measurement
of temperature (T)
Support for a second meter run through communication with a separate external transmitter
Base I/O consists of two on-board channels you can individually configure as either digital
input (DI), digital output (DO) or pulse input (PI) and two on-board I/O channels you can
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individually configure as either analog input (AI) or analog output (AO). Optional 6-channel
expansion I/O board available
Power from a DC power supply, or an optional lead acid battery/solar panel combination
Serial communication options for RS-232, RS-485 (2-wire), and RS-485/422 (4-wire).
Ethernet
HMI module with optional display and back light for local operator interaction
Optional Wi-Fi
from a laptop without physical cable connection.
Application software supports AGA3, AGA8, ISO 5167, ISO 6976, and API 21.1 calculations in
U.S., metric, or other natural gas standard units.
Application software optionally supports API Chapter 11.1, API Chapter 12.2, API 20.1, and
API 21.2 calculations in U.S., metric, or other hydrocarbon liquid standard units.
®
transceiver (802.11 b/g) for field technician to access the flow computer
1.3 FB1200 Flow Computer Models
You can purchase the FB1200 Flow Computer with or without integrated sensors.
1.3.1 FB1200 Flow Computer (with Multi-variable or Static Pressure
Sensor)
The flow computer with sensors has either a multi-variable sensor module or a static pressure
sensor:
Figure 1-2: FB1200 Flow Computer – Multivariable (Left); Static Pressure (Right)
4 Introduction
Emerson FB1200 Flow Computer Instruction Manual
Memory
Usage
8 MB SRAM
Holds in-use configuration, current state of all variables
Holds firmware image, historical logs, configuration backup (if saved to flash),
1.3.2 FB1200 Flow Computer (without Integral Sensor)
The no integral sensor version includes no sensor module. In this case the process variable data
used in flow computer calculations comes from external devices and enters the device through the
serial ports or I/O channels.
Figure 1-3: FB1200 Flow Computer (No Integral Sensor Version)
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1.4 Central Processing Unit (CPU)
The flow computer’s CPU is a NXP® Kinetis® K61 series CPU with an ARM® Cortex® M4 processor
that operates at 4 MHz to 60 MHz depending on the power mode. The CPU runs the Micrium
operating system.
1.4.1 Memory
The flow computer includes both static and flash memory.
Table 1-1: Memory
128 MB Flash
and the executing program
1.5 Explosion-proof Enclosure
The FB1200 Flow Computer includes an explosion-proof enclosure made of either aluminum or
stainless steel. The enclosure consists of the main housing, two threaded covers, and four conduit
entry points.
Introduction 5
Emerson FB1200 Flow Computer Instruction Manual
1
Retaining clamp (For ATEX & IEC approved products only)
2
Tie holes in end caps
3
Tie holes in coupling screws
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The four conduit entry points are ¾ in NPT pipe threaded holes that permit entry of field conduit
for I/O and communication wiring. ATEX installations use a ¾ in NPT to M20 thread reducer.
Unused apertures shall be closed with suitable blanking elements.
The FB1200 Flow Computer can operate in an unprotected outdoor environment. Wiring for I/O,
communications, and power enters the enclosure through the four conduit fittings with
appropriate protective seals and connects to the terminal plate.
The front end cap (cover) provides a viewing window for the HMI module. You can access the
terminal plate by removing the rear end cap (cover).
The FB1200 Flow Computer has 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 (non-incendive) hazardous locations or
non-hazardous locations. See Appendix A and Appendix B for more information.
The FB1200 Flow Computer has European certification for EExd Zone 1 (flame proof) and EExd
Zone 2 (non-sparking) hazardous locations or non-hazardous locations. See Appendix C and
Appendix D for more information.
Details on certification information are included on the data plate screwed to the top of the
enclosure.
1.5.1 Physical Security
The flow computer end caps include retaining clamps for ATEX/IEC applications. In addition, if local
regulations require it, you can wire a tamper-resistant seal using the tie holes located in the front
and rear end caps, and in the coupling screws.
Figure 1-4: Retaining Clamps and Tie Holes for Tamper-resistant Seals
6 Introduction
1.6 I/O
FB1200 Flow Computer
without optional I/O
FB1200 Flow Computer
with optional I/O
MV (P, DP, T) or Static Pressure Sensor
MV (P, DP, T) or Static Pressure Sensor
2 DI/DO/PI channels
6 DI/DO/PI channels (4 of these reside on the 6-channel
2 AI/AO channels
4 AI/AO channels (these reside on the 6-channel
The flow computer comes with base I/O from both the CPU and the built-in multi-variable (MV)
sensor. Base I/O consists of:
An optional 6-channel expansion I/O board includes:
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Pressure (P) input from the MV sensor, differential pressure (DP) input from the MV sensor,
connections for temperature (T) input from a customer-supplied RTD
pressure sensor.
Two on-board I/O channels that you can individually configure as digital input (DI), digital
output (DO), or pulse input (PI)
Two on-board I/O channels that you can individually configure as either analog input (AI) or
analog output (AO)
Four I/O channels that you can individually configure as digital inputs (DI), digital outputs
(DO), or pulse inputs (PI)
Two I/O channels that you can individually configure as either analog inputs (AI), or analog
outputs (AO)
or a single static
Table 1-2: FB1200 Flow Computer I/O Configurations
1.7 Power Options
You can power the flow computer using an external DC input, an internal battery, or an internal
rechargeable battery connected to a solar panel.
Important
Use only batteries supplied with the flow computer or sold by Emerson Remote Automation
Solutions as spare parts for this flow computer. If you substitute a battery you obtain elsewhere
void your certification unless it is the identical part from the same manufacturer as that supplied
with the flow computer from Emerson.
expansion I/O board)
expansion I/O board)
you
Introduction 7
Emerson FB1200 Flow Computer Instruction Manual
Option
Usage
External DC Power
Lead Acid Battery Pack
6.0 Vdc
Port
Type
Use
COM1 Serial communications
RS-232, RS-485 (2-wire), RS-485/422 (4-wire)
COM2 Serial communications
RS-232 or RS-485 (2-wire) communication to
COM3 Serial communications
RS-232 or RS-485 (2-wire) communication to
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Table 1-3: Power Options
Supply
5.7 Vdc to 30 Vdc external supply (Max power at 10 watts)
1.8 Communications
The flow computer includes three serial communication ports and one Ethernet port. The serial
ports allow communication using DNP3, Modbus, BSAP, and ROC protocols. The Ethernet port is an
RJ-45 connector. The Ethernet port supports a maximum of six concurrent TCP connections
(sockets).
Table 1-4: Serial Ports
Software-selectable for RS-232, RS485 (2-wire), RS-485/422 (4-wire)
operation
4-wire
4.5Ah
Not suitable with ATEX or IECEx applications
Can be optionally charged by a 6-watt solar panel
communication to host or other devices. 4-wire
used with external radio.
Software-selectable for RS-232, or
RS-485 (2-wire) operation
2-wire
Software-selectable for RS-232, or
RS-485 (2-wire) operation
2-wire
1.9 Human-Machine Interface (HMI) Module
The flow computer includes an HMI module with an optional liquid crystal display (LCD) for local
operator access to the device. The LCD, if present, shows a series of menus that sequentially display
the current values of particular process variables. A configuration parameter in FBxConnect
determines whether you must log in first to view the menus. If required, you log in by selecting
alphanumeric characters by scrolling through a list until you select the correct character.
The HMI module includes four LEDs to provide status information. Units with the display include
four infrared (IR) buttons for operator interaction.
8 Introduction
host or other devices.
host or other devices.
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To conserve power, the HMI module enters sleep mode after a period of inactivity. Sleep mode
disables FBxWifi communication. In FBxConnect, you can configure the number of minutes of
inactivity triggering sleep mode through the LCD Sleep Time parameter. Setting this parameter to
0 disables sleep mode which keeps the HMI module on but uses significantly more power.
Figure 1-5: HMI Module with LCD
Figure 1-6: HMI Module without LCD
Note
If your flow computer does not include the LCD option, you still have the status LEDs and a single IR
button for waking up the device (shown in Figure 1-6).
1.10 FBxWifi™ Communications
The flow computer has an optional Wi-Fi® transceiver (FBxWifi) that enables you to connect via a
laptop or tablet from some small distance away.
This capability allows an operator to potentially remain outside the hazardous location and still
communicate with the flow computer. The operator's laptop must have Wi-Fi capability, line-ofsight access to the HMI module, and must be loaded with FBxConnect configuration software.
Once connected, the operator can view process values, edit configuration parameters, and collect
logs.
Introduction 9
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Note
The FBxWifi electronics reside inside the HMI module. The HMI module must be awake to use
FBxWifi communications You can wake it up manually by holding a finger against the front cover
glass over the Hold to Wake button (the left-most button) for typically from five to ten seconds.
1.11 Software Tools
The FBxConnect configuration software provides a series of wizards that allow you to perform
configuration activities for the flow computer. You connect a PC running the FBxConnect
configuration software to the flow computer using one of the communication ports or through a
wireless connection. You can then:
Set parameters within your application
Configure I/O channels
Specify the serial communication method for a port (RS-232 to RS-485) as needed
View or collect audit trail information such as alarm, event, or historical logs
Update system firmware
1.12 RoHS2 Compliance
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-of-scope when used for
the intended design purpose in a Large Scale Fixed Installation (LSFI).
Consult https://www.emerson.com/compliance for up-to-date product information.
10 Introduction
Section 2: Installation
This section covers the following topics:
Hazardous Locations
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Environmental Specifications
Required Tools
Site Considerations
General Wiring Guidelines
Front or Rear End caps
Mounting the Enclosure
Grounding the Device
Terminal Plate
Power Modes
Connecting Power
Installing the Optional Solar Panel
Connecting Communication Ports
The flow computer ships from the factory fully assembled, except for the optional solar panel
assembly.
2.1 Hazardous Locations
The housing for the FB1200 Flow Computer is an explosion-proof case designed to operate in
hazardous locations.
For North America the FB1200 Flow Computer has certifications for Class I, Division 1 (Groups C &
D) explosion-proof, Class I Division 2 (Groups A, B, C & D) non-incendive, and non-hazardous
locations only. Appendix A contains special information for Class I Division 2 installations; Appendix B
contains special information for Class I Division 1 installations.
For Europe the FB1200 Flow Computer has certifications for Ex db Zone 1 flame-proof and for Ex nA
Zone 2 non-sparking installations and non-hazardous locations only. Appendix C contains special
information for Ex nA Zone 2 installations; Appendix D contains special information for Ex db Zone 1
installations.
All certifications are listed on the data plate located on the top of the device.
2.2 Environmental Specifications
This section summarizes the environmental specifications for the device. For full details, refer to
the product data sheet FB1200 Flow Computer (D301790X012).
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Emerson FB1200 Flow Computer Instruction Manual
Specification
Range
Ambient Temperature
-40°C to +80 °C (-40 °F to +176 °F) - no battery, C1D1/C1D2
Maximum Process
Humidity
5% to 95% non-condensing
Vibration
2g over 10 to 150 Hz; 1g over 150 to 200 Hz
Tool
Use
Torque wrench
For bolting/mounting the flow computer
2.5 mm hexagonal wrench
For manipulating rotation set screw
3 mm hexagonal wrench
For screw for M4 x 0.7 end cap retaining clamp
9/16 in hexagonal wrench
For installing/removing ¾ in NPT conduit plugs
1 1/16 in combination wrench
For installing/removing ¾ in NPT to M20 thread
#1 Phillips-head screwdriver
For screws on HMI module
#2 Phillips-head screwdriver
For screws on other modules and boards
1/8 inch flat-head screwdriver
For 5.08 mm pitch terminal block connections
3/32-inch flat head screwdriver
For 3.81 mm pitch terminal block connections
Laptop PC running Field Tools with FBxConnect
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Table 2-1: Environmental Specifications
Connection Temperature
2.3 Required Tools
Certain tools and equipment are required for installing and servicing the flow computer.
Table 2-2: Required Tools
-40°C to +80 °C (-40°F to +176 °F) – lead acid battery, C1D1/C1D2
-40°C to +80 °C (-40 °F to +176 °F) – no battery, ATEX/IEC Ex db
-40°C to +80 °C (-40 °F to +176 °F) – no battery, ATEX/IEC Ex nA
120 °C (248 °F)
configuration software
2.4 Site Considerations
The flow computer must reside in an accessible location for configuration and service. Refer to the
dimensional drawings for information on the space required.
Ensure the installation location provides easy access to the HMI module.
(ATEX required)
reducer (ATEX required)
For software configuration
12 Installation
Emerson FB1200 Flow Computer Instruction Manual
If your unit includes the optional solar panel, ensure the installation location provides
sufficient space to mount the solar panel and adequate sunlight to charge the battery.
If your unit includes the optional FBxWifi, ensure the installation location provides line-ofsight access to the transceiver.
Figure 2-1: FB1200 Flow Computer Dimensions – Multivariable Sensor Version (Option F1)
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Figure 2-2: FB1200 Flow Computer Dimensions – No Integral Sensor Version (Option F0)
14 Installation
Emerson FB1200 Flow Computer Instruction Manual
Figure 2-3: FB1200 Flow Computer Dimensions – Static Pressure Sensor (Option F2)
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2.5 General Wiring Guidelines
The flow computer’s pluggable terminal blocks use compression-type terminals.
The 5.08 mm pitch terminal blocks accommodate wire between 28 and 12 AWG; the 3.81 mm
pitch terminal blocks accommodate wire between 28 and 14 AWG.
When making a connection, insert the bare end of the wire (approx. 1/4" max) into the clamp
adjacent to the screw and secure the screw.
To prevent shorts, ensure that no bare wire is exposed.
Allow some slack in the wire while making terminal connections. Slack makes the wires more
manageable and helps minimize mechanical strain on the terminal blocks.
Use twisted pair, shielded and insulated cable for communication and I/O wiring to minimize
signal errors caused by electromagnetic interference (EMI), radio frequency interference
(RFI) and transients. When using shielded cable, ground all shields at only one point in the
appropriate system. This prevents circulating ground current loops that can cause signal
errors.
2.6 Front or Rear End Caps
The flow computer includes two threaded covers (end caps). The front end cap includes a window
for viewing the HMI module; the rear end cap provides access to the terminal plate for power and
I/O wiring.
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Emerson FB1200 Flow Computer Instruction Manual
1
End Cap
2
Screw
3
Retaining Clamp
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2.6.1 Removing/Replacing Retaining Clamp on End Caps
For flameproof ATEX/IEC applications, each end cap includes a retaining clamp which screws down
to prevent the end cap from being unscrewed.
Figure 2-4: Front End Cap with Retaining Clamp Fitted
Figure 2-5: Retaining Clamp in Place
To loosen or tighten the screw, use a 3mm hexagonal wrench. When tightening, torque to 12 in-lbs
(1.4 N m).
Figure 2-6: Retaining Clamp and Screw
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Emerson FB1200 Flow Computer Instruction Manual
2.6.2 Removing the Front or Rear End Caps
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DANGER
EXPLOSION HAZARD: Never remove end cap(s) in a hazardous location. Removing end cap(s) in a
hazardous location could result in an explosion.
Note
If you need more leverage place a long screwdriver or other appropriate tool across the two
notches in the end cap to act as a pry bar (see Figure 2-7).
Figure 2-7: Removing or Tightening the End Cap with Long Screwdriver
1. Remove the retaining clamp (if present). (See Section 2.6.1)
2. Grasp the end cap (front or rear).
Figure 2-8: Front (left) and Rear (right) End caps
3. Unscrew the end cap turning it counter-clockwise until it comes off. Set it aside in a safe
location.
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Figure 2-9: Front (left) and Rear (right) End Caps Removal
2.6.3 Replacing the Front or Rear End Caps
DANGER
EXPLOSION HAZARD: Ensure the area in which you perform this operation is non-hazardous.
Performing this operation in a hazardous area could result in an explosion.
1. Grasp the end cap (front or rear).
2.
Carefully align the end cap threads with the threads of the enclosure.
Important
When replacing the rear end cap, ensure wires connecting to the terminal plate do not get
crimped or caught between the end cap threads and the enclosure.
3.
Screw the end cap clockwise (eight full turns) until it is tightly sealed to the enclosure.
4. Replace the retaining clamp (if required). (See Section 2.6.1)
Note
If you need more leverage place a long screwdriver or other appropriate tool across the two
notches in the end cap to act as a pry bar (see Figure 2-7).
2.7 Mounting the Enclosure
You can mount the flow computer either directly to a manifold on the pipeline or indirectly on a
two-inch pipe or pole.
Direct mount installations use either a traditional mounting kit or a coplanar mounting kit. Indirect
mount installations use an inline mounting kit.
2.7.1 Bolting Considerations
If the flow computer installation requires assembly of a process flange, manifold, or flange
adapters, follow these assembly guidelines to ensure a tight seal for optimal performance
characteristics of the flow computer.
Only use bolts supplied with the flow computer or sold by Emerson Remote Automation Solutions
as spare parts. Refer to the figure for common flow computer assemblies with the bolt length
required for proper flow computer installation.
DANGER
18 Installation
Emerson FB1200 Flow Computer Instruction Manual
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EXPLOSION HAZARD: Ensure the area in which you perform this operation is non-hazardous.
Performing this operation in a hazardous area could result in an explosion.
Note
For all other manifolds, contact your local Emerson Sales office or Emerson Impact Partner.
Bolts are typically carbon steel or stainless steel. Confirm the material by viewing the markings on
the head of the bolt and referencing the figure. If bolt material is not shown in the figure, contact
your local Emerson Remote Automation Solutions representative for more information.
Figure 2-10: Transmitter with Coplanar Flange
Figure 2-11: Transmitter with Coplanar Flange and Optional Flange Adapters
Figure 2-12: Transmitter with Traditional Flange and Optional Flange Adapters
Use the following bolt installation procedure:
1. Carbon steel bolts do not require lubrication. Stainless steel bolts are factory-coated with a
lubricant to ease installation. Do not apply any additional lubricant when installing either
type of bolt.
2. Finger-tighten the bolts.
3. Torque the bolts to the initial torque value using a crossing pattern. See Table 2-3 for initial
torque value.
Installation 19
Emerson FB1200 Flow Computer Instruction Manual
Bolt Material
Head markings
Initial Torque
Final Torque
1
Bolt
2
Sensor module
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4. Torque the bolts to the final torque value using the same crossing pattern. See Table 2-3 for
final torque value.
5. Verify that the flange bolts protrude through the sensor module before applying pressure.
Table 2-3: Torque Values for the Flange and Flange Adapter Bolts
Carbon
Steel (CS)
Stainless Steel
(SST)
Figure 2-13: Proper Bolt Installation
300 in. -lbs.
(33.9 N m)
150 in. -lbs.
(16.9 N m)
650 in. -lbs.
(73.4 N m)
300 in. -lbs.
(33.9 N m)
2.7.2 O-rings with Flange Adapters
20 Installation
DANGER
Failure to install proper flange adapter O-rings may cause process leaks, which can result in death
or serious injury. Only use the O-ring that is designed for its specific flange adapter.
Emerson FB1200 Flow Computer Instruction Manual
1
Flange
2
O-ring
3
Square PTFE-based profile
4
Round Elastomer profile
Figure 2-14: O-rings with Flange Adapters
1. Whenever the flange or adapters are removed, visually inspect the O-rings.
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2. Replace the O-rings if there are any signs of damage, such as nicks or cuts.
3. If the O-rings are replaced, re-torque the flange bolts and alignment screws after installation
to compensate for seating of the O-rings.
2.7.3 Direct Mount
Direct mount installations use either a traditional mounting kit or a coplanar mounting kit. Mount
the flow computer directly to the pipeline only if the pipeline includes a process manifold.
DANGER
EXPLOSION HAZARD: Ensure the area in which you perform this operation is non-hazardous.
Performing this operation in a hazardous area could result in an explosion.
1. Place taps in the top or side of the line.
2. Mount the flow computer beside or above the taps.
2.7.4 Indirect Mount
You can mount the flow computer to a two-inch pipe or pole. Indirect mount can use the inline,
coplanar, or traditional flange mounting kits.
Installation 21
DANGER
EXPLOSION HAZARD: Ensure the area in which you perform this operation is non-hazardous.
Performing this operation in a hazardous area could result in an explosion.
Emerson FB1200 Flow Computer Instruction Manual
1
2.0 in. pipe diam. U-bolt assembly (5/16-18 x 4.0 LG) with (2) nuts (item 3)
2
Mounting bracket
3
Apply Loctite® 222™ Low Strength Purple Threadlocker to nuts. Torque nuts to 30
4
7/16-20 x .625 cs/zinc cobalt screws (4). Torque to 30 in-lbs (3.4 N m)
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Figure 2-15: Traditional Flange Mounting Kit
in-lbs (3.4 N m
22 Installation
Figure 2-16: Coplanar Mounting Kit
1
Tubular L-shaped bracket
2
3/8-16 x 1 ½ in socket head wire lockable screw (2) – Apply Killark® LUBG-6 Thread
3
Split 3/8 lock washer (2)
4
5/16-18 keps nut (2). Apply Loctite 222 Low Strength Purple Threadlocker to nuts. Torque
5
U-bolt bracket
6
2-inch diameter pipe U-bolt
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Lubricant to threads. Torque screws to 30 in-lbs (3.4 N m)
nuts to 30 in-lbs (3.4 N m)
Installation 23
Emerson FB1200 Flow Computer Instruction Manual
1
Pipe mounting bracket
2
U-bolt 2 ½ inch diam. pipe (5/16-18 x 3.75 long)
3
5/16 flat lock washer (2)
4
5/16-18 300 series hex nut (2) - Apply Loctite 222 Low Strength Purple Threadlocker to
5
U-bolt clamp assembly - Apply Loctite 222 threadlocker to threads. Torque nuts to 30 in-lbs
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Figure 2-17: Inline Mounting Kit
threads. Torque nuts to 30 in-lbs (3.4 N m)
(3.4 N m)
2.7.5 Rotating the Housing
To improve accessibility to the HMI module or to ease wiring, you can optionally rotate the
housing.
Important
Never rotate the housing more than 180 degrees from its original (as-shipped) position. Overrotation can break electronics within the unit.
24 Installation
Emerson FB1200 Flow Computer Instruction Manual
1
Set Screw (one each side)
Figure 2-18: Housing Rotation Set Screw (1 each side)
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Installation 25
DANGER
EXPLOSION HAZARD: Ensure the area in which you perform this operation is non-hazardous.
Performing this operation in a hazardous area could result in an explosion.
3. Loosen the two housing rotation set screws.
4. Rotate the housing no more than 180 degrees from its original (as-shipped) position.
5. Re-tighten the two housing rotation set screws. Torque to 6 in-lbs. (0.7 N m).
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