Emerson Rosemount 2051 User manual

www.rosemount.com
Reference Manual
00809-0100-4101, Rev AA
July 2008
Rosemount 2051 Pressure Transmitter
with 4-20 mA HART and 1-5 Vdc Low Power Protocol

Reference Manual
00809-0100-4101, Rev AA
July 2008 Rosemount 2051
www.rosemount.com
Rosemount 2051 Pressure
Transmitter
Rosemount 2051 Pressure Transmitters may be protected by one or more of the following: U.S.
Patent Nos. 4466290; 4612812; 4791352; 4798089; 4818994; 4866435; 4878012; 4988990;
4926340; 5083091; 5122794; 5166678; 5248167; 5278543; 5287746; 5329818; 5333504;
5585777; 6017143; 6119047; 6295875; Des. 317266; Des. 318432; Des 342456. May depend on
model. Other U.S. and foreign patents issued and pending.
NOTICE
Read this manual before working with the product. For personal and system safety, and for
optimum product performance, make sure you thoroughly understand the contents before
installing, using, or maintaining this product.
For technical assistance, contacts are listed below:
Customer Central
Technical support, quoting, and order-related questions.
United States - 1-800-999-9307 (7:00 am to 7:00 pm CST)
Asia Pacific- 65 777 8211
Europe/ Middle East/ Africa - 49 (8153) 9390
North American Response Center
Equipment service needs.
1-800-654-7768 (24 hours—includes Canada)
Outside of these areas, contact your local Emerson Process Management representative.
The products described in this document are NOT designed for nuclear-qualified
applications. Using non-nuclear qualified products in applications that require
nuclear-qualified hardware or products may cause inaccurate readings.
For information on Rosemount nuclear-qualified products, contact your local Emerson
Process Management Sales Representative.

Reference Manual
00809-0100-4101, Rev AA
July 2008
TOC-1
Rosemount 2051
SECTION 1
Introduction
Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Service Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Models Covered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Transmitter Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
SECTION 2
Installation
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Mechanical Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
HART Installation Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Dimensional Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Mount the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Impulse Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Process Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Housing Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
LCD Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Configure Security and Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Electrical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Conduit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Transient Protection Terminal Block . . . . . . . . . . . . . . . . . . . . . . 2-28
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
Hazardous Locations Certifications . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Rosemount 305, 306 and 304 Manifolds . . . . . . . . . . . . . . . . . . . . . 2-31
Rosemount 305 Integral Manifold Installation Procedure . . . . . . 2-32
Rosemount 306 Integral Manifold Installation Procedure . . . . . . 2-32
Rosemount 304 Conventional Manifold Installation Procedure. . 2-32
Integral Manifold Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Liquid Level Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
Open Vessels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
Closed Vessels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
SECTION 3
Configuration
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Setting the Loop to Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Configuration Data Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
HART Communicator Menu Trees . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Fast Key Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Check Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Process Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Sensor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Basic Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Set Process Variable Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Table of Contents

Reference Manual
00809-0100-4101, Rev AA
July 2008
Rosemount 2051
TOC-2
Set Output (Transfer function) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Rerange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
LCD Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
LCD Display Configuration for 4-20 mA HART only . . . . . . . . . . . 3-15
Custom Display Configuration 4-20 mA HART only . . . . . . . . . . . 3-15
Detailed Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Failure Mode Alarm and Saturation . . . . . . . . . . . . . . . . . . . . . . . 3-16
Alarm and Saturation Levels for Burst Mode . . . . . . . . . . . . . . . . 3-17
Alarm and Saturation Values for Multidrop Mode. . . . . . . . . . . . . 3-17
Alarm Level Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Diagnostics and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Transmitter Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Loop Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Advanced Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Saving, Recalling, and Cloning Configuration Data . . . . . . . . . . . 3-20
Burst Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Multidrop Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
Changing a Transmitter Address . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Communicating with a Multidropped Transmitter . . . . . . . . . . . . . 3-24
Polling a Multidropped Transmitter. . . . . . . . . . . . . . . . . . . . . . . . 3-24
SECTION 4
Operation and
Maintenance
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Calibration Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Determining Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Choosing a Trim Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Analog Output Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Digital-to-Analog Trim. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Digital-to-Analog Trim Using Other Scale. . . . . . . . . . . . . . . . . . . . 4-8
Recall Factory Trim—Analog Output . . . . . . . . . . . . . . . . . . . . . . . 4-9
Sensor Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Sensor Trim Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Zero Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Sensor Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Recall Factory Trim—Sensor Trim . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Compensating for Line Pressure . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
SECTION 5
Troubleshooting
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Warnings () . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Diagnostic Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Remove from Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Remove Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Remove the Electronics Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Remove the Sensor Module from the Electronics Housing . . . . . . 5-9
Reassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Attach the Electronics Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Install the Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Reassemble the 2051C Process Flange . . . . . . . . . . . . . . . . . . . 5-10
Install the Drain/Vent Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

Reference Manual
00809-0100-4101, Rev AA
July 2008
TOC-3
Rosemount 2051
APPENDIX A
Reference Data
Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Conformance To Specification (±3s (Sigma)). . . . . . . . . . . . . . . . . A-1
Reference Accuracy(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Long Term Stability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Dynamic Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Line Pressure Effect per 1000 psi (6,9 MPa) . . . . . . . . . . . . . . . . . A-2
Ambient Temperature Effect per 50°F (28°C) . . . . . . . . . . . . . . . . A-3
Mounting Position Effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Vibration Effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Power Supply Effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Electromagnetic Compatibility (EMC). . . . . . . . . . . . . . . . . . . . . . . A-3
Transient Protection (Option Code T1). . . . . . . . . . . . . . . . . . . . . . A-3
Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Range and Sensor Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Protocols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Overpressure Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Static Pressure Limit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Burst Pressure Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Temperature Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Humidity Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Volumetric Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Failure Mode Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Process Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
2051C Process Wetted Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
2051T Process Wetted Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
2051L Process Wetted Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Non-Wetted Parts for 2051C/T/L . . . . . . . . . . . . . . . . . . . . . . . . . A-10
Shipping Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-12
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-22
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-25
APPENDIX B
Approval Information
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Approved Manufacturing Locations . . . . . . . . . . . . . . . . . . . . . . . . B-1
European Directive Information . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
HART Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Hazardous Locations Certifications . . . . . . . . . . . . . . . . . . . . . . . . B-2
Approval Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-8
Factory Mutual (FM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-8
Canadian Standards Association (CSA). . . . . . . . . . . . . . . . . . . . B-21
APPENDIX C
Glossary
Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1 to C-2

Reference Manual
00809-0100-4101, Rev AA
July 2008
Rosemount 2051
TOC-4

Reference Manual
00809-0100-4101, Rev AA
July 2008 Rosemount 2051
www.rosemount.com
Section 1 Introduction
USING THIS MANUAL The sections in this manual provide information on installing, operating, and
maintaining Rosemount 2051 pressure transmitters with HART®protocol. The
sections are organized as follows:
•Section 2: Installation contains mechanical and electrical installation
instructions, and field upgrade options.
•Section 3: Configuration provides instruction on commissioning and
operating Rosemount 2051 transmitters. Information on software
functions, configuration parameters, and online variables is also
included.
•Section 4: Operation and Maintenance contains operation and
maintenance techniques.
•Section 5: Troubleshooting provides troubleshooting techniques for
the most common operating problems.
•Appendix A: Reference Data supplies reference and specification
data, as well as ordering information.
•Appendix B: Approval Information contains intrinsic safety approval
information, European ATEX directive information, and
approval drawings.
• Appendix C: Glossary
SERVICE SUPPORT To expedite the return process outside of the United States, contact the
nearest Emerson Process Management representative.
Within the United States, call the Emerson Process Management Instrument
and Valves Response Center using the 1-800-654-RSMT (7768) toll-free
number. This center, available 24 hours a day, will assist you with any needed
information or materials.
The center will ask for product model and serial numbers, and will provide a
Return Material Authorization (RMA) number. The center will also ask for the
process material to which the product was last exposed.
Emerson Process Management Instrument and Valves Response Center
representatives will explain the additional information and procedures
necessary to return goods exposed to hazardous substances.
Individuals who handle products exposed to a hazardous substance can avoid injury if they
are informed of and understand the hazard. If the product being returned was exposed to a
hazardous substance as defined by OSHA, a copy of the required Material Safety Data Sheet
(MSDS) for each hazardous substance identified must be included with the returned goods.

Reference Manual
00809-0100-4101, Rev AA
July 2008
Rosemount 2051
1-2
MODELS COVERED The following Rosemount 2051 Pressure Transmitters are covered by this
manual:
Rosemount 2051C Coplanar™Pressure Transmitter
2051CD - Differential Pressure Transmitter
Measures differential pressure up to 2000 psi (137,9 bar)
2051CG - Gage Pressure Transmitter
Measures gage pressure up to 2000 psi (137,9 bar)
Rosemount 2051T In-Line Pressure Transmitter
2051TG - Gage Pressure Transmitter
Measures gage pressure up to 10000 psi (689,5 bar)
2051TA - Absolute Pressure Transmitter
Measures absolute pressure up to 10000 psi (689,5 bar)
Rosemount 2051L Liquid Level Pressure Transmitter
2051L - Flange-Mounted Liquid Level Transmitter
Provides precise level and specific gravity measurements up to 300 psi
(20,7 bar) for a wide variety of tank configurations

Reference Manual
00809-0100-4101, Rev AA
July 2008
1-3
Rosemount 2051
TRANSMITTER
OVERVIEW
The Rosemount 2051C Coplanar design is offered for Differential Pressure
(DP) and Gage Pressure (GP) measurements where it utilizes Emerson
Process Management capacitance sensor technology. Piezoresistive sensor
technology is utilized in the Rosemount 2051T measurements.
The major components of the Rosemount 2051C are the sensor module and
the electronics housing. The sensor module contains the oil filled sensor
system (isolating diaphragms, oil fill system, and sensor) and the sensor
electronics. The sensor electronics are installed within the sensor module and
include a temperature sensor (RTD), a memory module, and the capacitance
to digital signal converter (C/D converter). The electrical signals from the
sensor module are transmitted to the output electronics in the electronics
housing. The electronics housing contains the output electronics board, the
local zero and span buttons, and the terminal block. The basic block diagram
of the Rosemount 2051CD is illustrated in Figure 1-1.
For the Rosemount 2051C design, pressure is applied to the isolating
diaphragms, the oil deflects the center diaphragm, which then changes the
capacitance. This capacitance signal is then changed to a digital signal in the
C/D converter. The microprocessor then takes the signals from the RTD and
C/D converter calculates the correct output of the transmitter. This signal is
then sent to the D/A converter, which converts the signal back to an analog
signal and superimposes the HART signal on the 4-20 mA output.
Figure 1-1. Block diagram of
operation
Sensor Module Electronics Board
4—20 mA Signal
to Control System
Signal Processing
Temp.
Sensor
Sensor Module
Memory
Microcomputer
• Sensor linearization
• Rerange
• Damping
• Diagnostics
• Engineering
• Communication
Module Memory
• Rerange values
• Configuration
Digital-to-
Analog Signal
Conversion
Digital
Communication
Local Span
and Zero
Adjustment
(optional)
HART Communicator

Reference Manual
00809-0100-4101, Rev AA
July 2008
Rosemount 2051
1-4

Reference Manual
00809-0100-4101, Rev AA
July 2008 Rosemount 2051
www.rosemount.com
Section 2 Installation
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1
General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2
Mechanical Considerations . . . . . . . . . . . . . . . . . . . . . . . . page 2-3
Environmental Considerations . . . . . . . . . . . . . . . . . . . . . page 2-3
HART Installation Flowchart . . . . . . . . . . . . . . . . . . . . . . . page 2-4
Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-5
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . page 2-5
Electrical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-25
Hazardous Locations Certifications . . . . . . . . . . . . . . . . . page 2-31
Rosemount 305, 306 and 304 Manifolds . . . . . . . . . . . . . . page 2-31
Liquid Level Measurement . . . . . . . . . . . . . . . . . . . . . . . . . page 2-35
OVERVIEW The information in this section covers installation considerations for the
Rosemount 2051 with HART protocols. A Quick Installation Guide for HART
protocol (document number 00825-0100-4101) is shipped with every
transmitter to describe basic pipe-fitting and wiring procedures for initial
installation. Dimensional drawings for each 2051 variation and mounting
configuration are included on page 2-5.
HART Communicator and AMS Device Manager instructions are given to
perform configuration functions. For convenience, HART Communicator fast
key sequences are labeled “Fast Keys” for each software function below the
appropriate headings.
SAFETY MESSAGES Procedures and instructions in this section may require special precautions to
ensure the safety of the personnel performing the operation. Information that
raises potential safety issues is indicated with a warning symbol ( ). Refer
to the following safety messages before performing an operation preceded by
this symbol.

Reference Manual
00809-0100-4101, Rev AA
July 2008
Rosemount 2051
2-2
Warnings
GENERAL
CONSIDERATIONS
Measurement accuracy depends upon proper installation of the transmitter
and impulse piping. Mount the transmitter close to the process and use a
minimum of piping to achieve best accuracy. Also, consider the need for easy
access, personnel safety, practical field calibration, and a suitable transmitter
environment. Install the transmitter to minimize vibration, shock, and
temperature fluctuation.
IMPORTANT
Install the enclosed pipe plug (found in the box) in unused conduit opening
with a minimum of five threads engaged to comply with explosion-proof
requirements.
For material compatibility considerations, see document number
00816-0100-3045 on www.emersonprocess.com/rosemount.
Explosions could result in death or serious injury:
Installation of this transmitter in an explosive environment must be in accordance with the
appropriate local, national, and international standards, codes, and practices. Please review the
approvals section of the 2051 reference manual for any restrictions associated with a safe
installation.
• Before connecting a HART communicator in an explosive atmosphere, ensure the
instruments in the loop are installed in accordance with intrinsically safe or non-incendive
field wiring practices.
• In an Explosion-Proof/Flameproof installation, do not remove the transmitter covers when
power is applied to the unit.
Process leaks may cause harm or result in death.
• Install and tighten process connectors before applying pressure.
Electrical shock can result in death or serious injury.
• Avoid contact with the leads and terminals. High voltage that may be present on leads can
cause electrical shock.
Electrical shock can result in death or serious injury.
• Avoid contact with the leads and terminals.
Process leaks could result in death or serious injury.
• Install and tighten all four flange bolts before applying pressure.
• Do not attempt to loosen or remove flange bolts while the transmitter is
in service.
Replacement equipment or spare parts not approved by Emerson Process
Management for use as spare parts could reduce the pressure retaining
capabilities of the transmitter and may render the instrument dangerous.
• Use only bolts supplied or sold by Emerson Process Management as spare
parts.
• Refer to page A-25 for a complete list of spare parts.
Improper assembly of manifolds to traditional flange can damage sensor module.
• For safe assembly of manifold to traditional flange, bolts must break back
plane of flange web (i.e., bolt hole) but must not contact sensor module
housing.

Reference Manual
00809-0100-4101, Rev AA
July 2008
2-3
Rosemount 2051
MECHANICAL
CONSIDERATIONS
NOTE
For steam service or for applications with process temperatures greater than
the limits of the transmitter, do not blow down impulse piping through the
transmitter. Flush lines with the blocking valves closed and refill lines with
water before resuming measurement.
NOTE
When the transmitter is mounted on its side, position the Coplanar flange to
ensure proper venting or draining. Mount the flange as shown in Figure 2-8 on
page 2-18, keeping drain/vent connections on the bottom for gas service and
on the top for liquid service.
ENVIRONMENTAL
CONSIDERATIONS
Best practice is to mount the transmitter in an environment that has minimal
ambient temperature change. The transmitter electronics temperature
operating limits are –40 to 185 °F (–40 to 85 °C). Refer to Appendix A:
Reference Data that lists the sensing element operating limits. Mount the
transmitter so that it is not susceptible to vibration and mechanical shock and
does not have external contact with corrosive materials.

Reference Manual
00809-0100-4101, Rev AA
July 2008
Rosemount 2051
2-4
HART INSTALLATION
FLOWCHART
Figure 2-1. HART Installation
Flowchart
START HERE
Bench
Calibration? Field Install
No
Set Units
(page 3-9)
Set Range
Points
(page 3-10)
Set Output
Type
(page 3-9)
Set Damping
(page 3-13)
Verify
Apply Pressure
Yes
Within
Specifications
?
Yes
No
Refer to
Section 4:
Operation and
Maintenance
Configure
Security and
Alarm
(page 2-23)
Mount
Transmitter
(page 2-12)
Wire Transmitter
(pages 2-26–2-31)
Power
Transmitter
(page 2-27)
Check Process
Connection
(page 2-19)
Trim Transmitter
for Mounting
Effects
(page 4-10)
Done
Review
Transmitter
Configuration
(page 3-4)
Confirm
Transmitter
Configuration
(page 3-4)
Configure

Reference Manual
00809-0100-4101, Rev AA
July 2008
2-5
Rosemount 2051
INSTALLATION
PROCEDURES
Dimensional Drawings
2051C Coplanar Flange Dimensional Drawing
2051C Coplanar with Rosemount 305 Coplanar Integral Manifold
3.85 (98)
7.03 (179)
4.36 (111)
5.00 (127)
6.40 (163)
3.85 (98)
7.44
(189)
Drain/ Vent
Valve
5.50 (140)
MAX OPEN
6.19
(157)
10.60 (270)
MAX OPEN
4.36 (111)
5.00 (127)

Reference Manual
00809-0100-4101, Rev AA
July 2008
Rosemount 2051
2-6
Coplanar Flange Mounting Configurations with
Optional Bracket (B4) for 2-in. Pipe or Panel Mounting
PANEL MOUNTINGPIPE MOUNTING
Dimensions are in inches (millimeters)
4.36
(111)
2.82
(72)
7.03
(179)
2.81
(71)
4.73
(120)
6.15
(156)
2.18
(55)
5/16 ⫻11/2Bolts
for Panel Mounting
(Not Supplied)
3/8–16 × 11/4Bolts
for Mounting
to Transmitter
2.8 (71)
3.4 (85)
6.22
(158)
3.51
(89)
2-inch U-Bolt
for Pipe Mounting
3.4 (85)
3/8–16 × 11/4Bolts
for Mounting
to Transmitter

Reference Manual
00809-0100-4101, Rev AA
July 2008
2-7
Rosemount 2051
2051C Coplanar with Traditional Flange
2051C Coplanar with Rosemount 305 Traditional Integral Manifold
3.85 (98)
7.76
(197)
3.40 (86)
1.10 (28)
1/2- 14 NPT
Flange
Adapter
(optional) Drain/
Vent Valve
1.05 (27)
5.00 (127)
4.36 (111)
1.626
(41,3)
2.126
(54)
3.85 (98)
1/2- 14 NPT
Flange
Adapter
(optional)
Drain/
Vent Valve
3.50
(89)
1.05
(27)
1.10
(28)
3.75 (95)
MAX OPEN
6.19
(157)
2.126
(54)
6.20
(158)
MAX
OPEN 8.90
(226)
MAX OPEN
2.70
(69)
MAX
OPEN
1.626
(41,3)
5.00 (127)
4.36 (111)

Reference Manual
00809-0100-4101, Rev AA
July 2008
Rosemount 2051
2-8
Traditional Flange Mounting Configurations with
Optional Brackets for 2-in. Pipe or Panel Mounting
Panel Mount (Bracket Option B2 / B8) Pipe Mount (Bracket Option B3 / B9 / BC)
Pipe Mount (Bracket Option B1 / B7 / BA)
9.18 (233)
2.62
(67)
6.19 (157)
5.32
(135)
1.94
(49)
3.50
(89)
1.10
(28)
3.56
(90)
MAX
OPEN
4.85
(123)
6.19
(157)
11.51
(292)
6.76 (172) 3.56 (90)
MAX OPEN
1.10 (28)
3.50 (89)
2.62 (67)
0.93
(24)