Reference Manual
00809-0100-4797, Rev EA
Rosemount™ 3051 Pressure Transmitter
with PROFIBUS® PA Protocol
April 2020
Safety messages
Procedures and instructions in this section may require special precautions to ensure the safety of the personnel performing the
operations. Information that raises potential safety issues is indicated by a warning symbol ( ). Refer to the following safety
messages before performing an operation preceded by this symbol.
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 representative.
CAUTION
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.
WARNING
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. Review the approvals section of this Reference Manual for any restrictions
associated with a safe installation.
In an explosion-proof/flameproof installation, do not remove the transmitter covers when power is applied to the unit.
Process leaks could result in death or serious injury.
Install and tighten process connectors before applying pressure.
Electrical shock could cause death or serious injury.
Avoid contact with the leads and terminals. High voltage that may be present on leads can cause electrical shock.
WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end users’ equipment. This could
be intentional or unintentional and needs to be protected against.
Physical security is an important part of any security program and fundamental to protecting your system. Restrict physical access
by unauthorized personnel to protect end users’ assets. This is true for all systems used within the facility.
2
Reference Manual Contents
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Contents
Chapter 1 Introduction.............................................................................................................. 5
1.1 Using this manual........................................................................................................................ 5
1.2 Models covered........................................................................................................................... 6
1.3 Device revisions...........................................................................................................................7
1.4 Transmitter overview...................................................................................................................7
1.5 Product recycling/disposal...........................................................................................................7
Chapter 2 Configuration............................................................................................................ 9
2.1 Section overview..........................................................................................................................9
2.2 Safety messages.......................................................................................................................... 9
2.3 Hazardous locations certifications............................................................................................... 9
2.4 Configuration guidelines..............................................................................................................9
2.5 Basic setup tasks........................................................................................................................11
2.6 Detailed setup tasks...................................................................................................................13
Chapter 3 Hardware Installation.............................................................................................. 21
3.1 Section overview....................................................................................................................... 21
3.2 Safety messages........................................................................................................................ 21
3.3 Considerations...........................................................................................................................21
3.4 Installation procedures.............................................................................................................. 22
3.5 Rosemount 305, 306, and 304 manifolds.................................................................................. 35
3.6 Liquid level measurement..........................................................................................................46
Chapter 4 Electrical Installation................................................................................................51
4.1 Section overview....................................................................................................................... 51
4.2 Safety messages........................................................................................................................ 51
4.3 LCD display ............................................................................................................................... 52
4.4 LCD display with local operator interface (LOI)...........................................................................52
4.5 Configure security and simulation..............................................................................................52
4.6 Electrical considerations............................................................................................................ 53
Chapter 5 Calibration............................................................................................................... 61
5.1 Section overview....................................................................................................................... 61
5.2 Safety messages........................................................................................................................ 61
5.3 Calibration overview..................................................................................................................61
5.4 Determining calibration frequency............................................................................................ 62
5.5 Zero trim................................................................................................................................... 63
5.6 Sensor trim................................................................................................................................ 64
5.7 Recall factory trim......................................................................................................................65
5.8 Compensating for line pressure .................................................................................................66
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Chapter 6 Troubleshooting...................................................................................................... 69
6.1 Section overview....................................................................................................................... 69
6.2 Safety messages........................................................................................................................ 69
6.3 Service support..........................................................................................................................69
6.4 Diagnostics and recommended action.......................................................................................70
6.5 Plantweb™ and NE107 diagnostics............................................................................................. 73
6.6 Alert messages and fail safe type selection.................................................................................74
6.7 Disassembly procedures............................................................................................................ 75
6.8 Reassembly procedures.............................................................................................................77
Appendix A Reference data......................................................................................................... 81
A.1 Product Certifications................................................................................................................81
A.2 Ordering Information, Specifications, and Drawings..................................................................81
Appendix B Local Operator Interface (LOI) Menu......................................................................... 83
B.1 Overview................................................................................................................................... 83
B.2 Safety messages........................................................................................................................ 83
B.3 Detailed LOI Menu..................................................................................................................... 84
Appendix C PROFIBUS® Block Information.................................................................................. 87
C.1 Overview................................................................................................................................... 87
C.2 Safety messages........................................................................................................................87
C.3 PROFIBUS block parameters...................................................................................................... 87
C.4 Condensed status......................................................................................................................93
4 Emerson.com/Rosemount
Reference Manual Introduction
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1 Introduction
1.1 Using this manual
The sections in this manual provide information on installing, operating, and maintaining
the Rosemount 3051 Pressure Transmitter with PROFIBUS® PA Protocol. The sections are
organized as follows:
• Configuration provides instruction on commissioning and operating Rosemount 3051
Transmitters. Information on software functions, configuration parameters, and online
variables is also included.
• Hardware Installation contains mechanical installation instructions, and field upgrade
options.
• Electrical Installation contains electrical installation instructions, and field upgrade
options.
• Calibration contains operation and maintenance techniques.
• Troubleshooting provides troubleshooting techniques for the most common operating
problems.
• Specifications and Reference Data supplies reference and specification data, as well as
ordering information.
• Product Certifications contains intrinsic safety approval information, European ATEX
directive information, and approval drawings.
• Local Operator Interface (LOI) Menu contains the complete local operator interface
menu.
• PROFIBUS® Block Information contains PROFIBUS block and parameter information.
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1.2 Models covered
Figure 1-1: Commissioning and Installation Flowchart
The following Rosemount 3051 Pressure Transmitters are covered by this manual:
• Rosemount 3051C Coplanar™ Pressure Transmitter
• Rosemount 3051CD Differential Pressure Transmitter
— Measures differential pressure up to 2000 psi (137,9 bar)
• Rosemount 3051CG Gage Pressure Transmitter
— Measures gage pressure up to 2000 psi (137,9 bar)
• Rosemount 3051CA Absolute Pressure Transmitter
— Measures absolute pressure up to 4000 psia (275,8 bar)
• Rosemount 3051T In-Line Pressure Transmitter
• Rosemount 3051T Gage and Absolute Pressure Transmitter
— Measures gage pressure up to 10000 psi (689,5 bar)
• Rosemount 3051L Liquid Level Transmitter
— Provides precise level and specific gravity measurements up to 300 psi (20,7 bar) for
a wide variety of tank configurations
Note
For Rosemount 3051 with HART® Protocol, see Reference Manual. For Rosemount 3051
with FOUNDATION™ Fieldbus, see Reference Manual.
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1.3 Device revisions
Date Software
revision
10/16 2.6.1 3.02 3051 GSD: rmt4444.gsd
PROFIBUS
profile
Compatible files Manual
Profile 3.02 GSD: pa139700.gsd
DD: ROPA3__TP_3051.ddl
DTM:
Pressure_PROFIBUS_3.02_DTM_v1.0.8.
exe
1.4 Transmitter overview
The Rosemount 3051C Coplanar design is offered for differential pressure (DP), gage
pressure (GP), and absolute pressure (AP) measurements. The Rosemount 3051C utilizes
Emerson Process Management capacitance sensor technology for DP and GP
measurements. Piezoresistive sensor technology is utilized in the Rosemount 3051T and
3051CA measurements.
The major components of the Rosemount 3051 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 optional local operator
interface (LOI) buttons, and the terminal block.
revision
DB
For the Rosemount 3051C 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.
1.5 Product recycling/disposal
Recycling of equipment and packaging should be taken into consideration and disposed of
in accordance with local and national legislation/regulations.
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2 Configuration
2.1 Section overview
This section contains information on commissioning the Rosemount™ 3051Pressure
Transmitter with PROFIBUS® PA Protocol using either the local operator interface (LOI) or
Class 2 Master.
2.2 Safety messages
Procedures and instructions in this section may require special precautions to ensure the
safety of the personnel performing the operations. Information that raises potential safety
issues is indicated by a warning symbol ( ). Refer to the following safety messages before
performing an operation preceded by this symbol.
WARNING
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. Review the
approvals section of this Reference Manual for any restrictions associated with a safe
installation.
In an explosion-proof/flameproof installation, do not remove the transmitter covers
when power is applied to the unit.
Process leaks could result in death or serious injury.
Install and tighten process connectors before applying pressure.
Electrical shock could cause death or serious injury.
Avoid contact with the leads and terminals. High voltage that may be present on leads can
cause electrical shock.
2.3 Hazardous locations certifications
Individual transmitters are clearly marked with a tag indicating the approvals they carry.
Transmitters must be installed in accordance with all applicable codes and standards to
maintain these certified ratings. Refer to Product Certifications for information on these
approvals.
2.4
Emerson.com/Rosemount 9
Configuration guidelines
The Rosemount 3051 can be configured either before or after installation. Configuring the
transmitter on the bench using the LOI or Class 2 Master ensures that all transmitter
components are in working order prior to installation.
Configuration Reference Manual
April 2020 00809-0100-4797
To configure on the bench, required equipment includes a power supply, an LOI (option
M4) or a Class 2 Master with DP/PA coupler, proper cable and terminators.
Verify the Security hardware jumper is set to the OFF position in order to proceed with
configuration. See Figure 4-2 for jumper location.
2.4.1 Profile 3.02 identification number adaptation mode
Rosemount 3051 PROFIBUS Profile 3.02 devices are set to Identification Number
Adaptation mode (0127) when shipped from the factory. This mode allows the transmitter
to communicate with any PROFIBUS Class 1 Master with either the generic Profile GSD
(9700) or Rosemount 3051 specific GSD (4444).
2.4.2 Block modes
When configuring a device with the LOI, the output status will change to Good – Function
Check to alert hosts that the transmitter is not in standard operation mode.
When configuring a device with a Class 2 Master, blocks must be set to Out of Service
(OOS) to download parameters that could affect the output. This prevents the Class 1
Master from seeing a jump in output without a status change. Setting the blocks OOS and
back into Auto might be done automatically using the Class 2 Master when using the
Rosemount 3051 DD or DTM™, if no additional action is required when configuring the
device. Verify the block mode is set back to Auto.
2.4.3
Configuration tools
The Rosemount 3051 can be configured using two tools: LOI and/or Class 2 Master.
The LOI requires option code M4 to be ordered. To activate the LOI, push either
configuration button located under the top tag of the transmitter. See Table 2-1 and
Figure 2-1 for operation and menu information. See Local Operator Interface (LOI) Menu
for a complete LOI menu tree.
Class 2 Masters require either DD or DTM files for configuration. These files can be found at
Emerson.com/Rosemount or by contacting Emerson representative. Some configurations
steps may need to be completed in offline mode or using the LOI.
The remainder of this section covers the configuration tasks using the applicable
configuration tool.
Note
Instructions in this section use the language found in the Class 2 Master or LOI. See to
cross reference parameters between the Class 2 Master, LOI and PROFIBUS specification.
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2.5 Basic setup tasks
The following tasks are recommended for initial configuration of the Rosemount 3051
PROFIBUS Device.
2.5.1 Assign address
The Rosemount 3051 is shipped with a temporary address of 126. This must be changed
to a unique value between 0 and 125 in order to establish communication with the Class 1
Master. Usually, addresses 0–2 are reserved for masters, therefore transmitter addresses
between 3 and 125 are recommended for the device.
Address can be set using either:
• LOI – see Table 2-1 and Figure 2-1
• Class 2 Master – see respective Class 2 Master manual for setting instrument addresses
2.5.2
Pressure configuration
The Rosemount 3051 ships with the following settings:
• Measurement type: Pressure
• Engineering units: Inches H2O
• Linearization: None
• Scaling: None
Each of these parameters can be set using,
• LOI – see Table 2-1 and Figure 2-1
• Class 2 Master – see Pressure configuration using Class 2 Master
Pressure unit parameters
The LOI was designed to automatically set the following parameters when selecting a
Pressure Unit:
• Measurement type: Pressure
• Linearization (Transducer Block): None
• Scaling: None
See Flow or Level Configuration for defaults when configuring with the LOI.
Table 2-1: LOI Operation
Button Action Navigation Character entry Save?
Scroll Moves down menu
Enter Select menu category Enters character and
(1) Characters flash when they can be changed.
Emerson.com/Rosemount 11
categories
Changes character
(1)
value
advances
Changes between Save
and Cancel
Saves
6. IDENTIFICATION #
5. DISPLAY
4. DAMPING
3. UNITS
2. CALIBRATION
1. ADDRESS
7. EXIT
1
- 126
RESET FACTORY
UPPER SENSOR
LOWER SENSOR
ZERO
TEMPERATURE
LEVEL
FLOW
PRESSURE
ENTER into menu
SCROLL down list
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Figure 2-1: LOI Menu
Note
See Local Operator Interface (LOI) Menu for a more detailed LOI menu and unit list.
Pressure configuration using Class 2 Master
Procedure
1. From the Basic Setup → Units → Primary Value → Primary Value Type dropdown,
select Pressure.
2. Select units.
Note
Pressure units in steps Step 3, 3.a, and 3.b must match.
3. From the Basic Setup → Units → Primary Value → Scale In (Transducer Block) →
Unit (Secondary Value 1) dropdown, select engineering unit.
a) From the Basic Setup → Units → Primary Value → Unit (PV) dropdown,
select engineering unit.
b) From the Basic Setup → Units → Output Signal (Analog Input Block) →
Unit (Out Scale) dropdown, select engineering unit.
4. Enter scaling.
Note
Scaling is done in the Transducer Block.
5. In the Basic Setup → Units → Primary Value → Scale In (Transducer Block) field,
enter upper and lower values (this value should correspond to the unit selected in
step Step 3).
a) In the Basic Setup → Units → Primary Value → Scale Out (Transducer
Block) field, enter upper and lower values (this value should correspond to
the unit selected in step 3.a).
6. Verify Analog Input (AI) Block.
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Note
Scaling should not be repeated in the Al Block. To ensure no additional scaling is
being done on the Al Block, set the lower values in steps Step 7 and 7.a to 0 and the
upper values to 100.
7. In the Basic Setup → Units → Process Value Scale (Analog Input Block) field, enter
upper and lower values (this value should correspond to the unit selected in step
3.a).
a) In the Basic Setup → Units → Output Signal (Analog Input Block) field,
enter upper and lower values (this value should correspond to the unit
selected in step 3.b).
b) From the Basic Setup → Units → Output Signal (Analog Input Block) →
Linearization Type dropdown, select No Linearization.
2.6 Detailed setup tasks
The following tasks explain how to configure the Rosemount 3051 for Flow or Level
measurement and how to configure additional parameters found in the device.
2.6.1
2.6.2
LOI Flow configuration
To configure the Rosemount 3051 for Flow measurement with the LOI, select UNITS →
FLOW. When configuring Flow units, the following parameters are set:
• Measurement type: Flow
• Linearization (Transducer Block): Square Root
During unit configuration, the user defines scaling, units and low flow cutoff per the
application requirements. See Local Operator Interface (LOI) Menu for detailed menu for
further scaling help.
Note
The LOI assumes a zero based scaling (minimum pressure = minimum flow = zero) for Flow
applications in order to improve configuration efficiency. Class 2 Masters can be used if
non-zero based scaling is required. Low flow cutoff has a default value of five percent. Low
Flow cutoff can be set to zero percent if required.
Class 2 Master flow configuration
To configure the transmitter for a flow application, use the flow output in the Transducer
Block.
Procedure
1. From the Basic Setup → Units → Primary Value → Primary Value Type dropdown,
select Flow.
2. Select units.
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Note
Flow units in steps 2.b and 2.c must match.
a) From the Basic Setup → Units → Primary Value → Scale In (Transducer
Block) → Unit (Secondary Value 1) dropdown, select engineering unit.
b) From the Basic Setup → Units → Primary Value → Unit (PV) dropdown,
select engineering unit.
c) From the Basic Setup → Units → Output Signal (Analog Input Block) →
Unit (Out Scale) dropdown, select engineering unit.
3. Enter scaling.
Note
Scaling is done in the Transducer Block.
a) In the Basic Setup → Units → Primary Value → Scale In (Transducer Block)
field, enter upper and lower values (this value should correspond to the unit
selected in step 2.a).
b) In the Basic Setup → Units → Primary Value → Scale Out (Transducer
Block) field, enter upper and lower values (this value should correspond to
the unit selected in step 2.b).
2.6.3
4. Verify Analog Input (AI) Block.
Note
Scaling should always be done in the Transducer Block. Ensure the Al Block is always
set to no linearization for flow applications. To ensure no additional scaling is being
done on the Al Block, set the lower values in steps 4.a and 4.b to 0 and the upper
values to 100.
a) In the Basic Setup → Units → Process Value Scale (Analog Input Block)
field, enter upper and lower values (this value should correspond to the unit
selected in step 2.b).
b) In the Basic Setup → Units → Output Signal (Analog Input Block) field,
enter upper and lower values (this value should correspond to the unit
selected in Step 2.c).
c) From the Basic Setup → Units → Output Signal (Analog Input Block) →
Linearization Type dropdown, select No Linearization.
Square root of DP configuration
The Rosemount 3051 has two pressure output settings: Linear and Square Root. Activate
the square root output option to make output proportional to flow.
To configure the transmitter to output square root of differential pressure, a Class 2
Master must be used.
Square Root configuration using Class 2 Master
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Procedure
1. From the Basic Setup → Units → Primary Value → Primary Value Type dropdown
menu, select pressure.
2. Select Units.
Note
Pressure units in steps 2.a, 2.b, and 2.c must match.
a) From the Basic Setup → Units → Primary Value → Scale In (Transducer
Block) → Unit (Secondary Value 1) dropdown, select engineering unit.
b) From the Basic Setup → Units → Primary Value → Unit (PV) dropdown,
select engineering unit.
c) From the Basic Setup → Units → Output Signal (Analog Input Block) →
Unit (Out Scale) dropdown, select engineering unit.
3. Enter scaling.
Note
Scaling is done in the Transducer Block. No scaling required for pressure
measurement.
a) In the Basic Setup → Units → Primary Value → Scale In (Transducer Block)
field, enter upper and lower values (this value should correspond to the unit
selected in step 2.a).
b) In the Basic Setup → Units → Primary Value → Scale Out (Transducer
Block) field, enter upper and lower values (this value should correspond to
the unit selected in step 2.b).
4. Verify Analog Input (AI) Block.
Note
Scaling should not be repeated in the Analog Input Block. To ensure no additional
scaling is being done on the Al Block, set the lower values in steps 4a and 4b to 0
and the upper values to 100.
a) In the Basic Setup → Units → Process Value Scale (Analog Input Block)
field, enter upper and lower values (this value should correspond to the unit
selected in step 2.b).
b) In the Basic Setup → Units → Output Signal (Analog Input Block) field,
enter upper and lower values (this value should correspond to the unit
selected in step 2.c).
c) From the Basic Setup → Units → Output Signal (Analog Input Block) →
Linearization Type dropdown, select Square Root.
2.6.4
Emerson.com/Rosemount 15
LOI Level configuration
To configure the Rosemount 3051 for Level measurement with the LOI, select UNITS →
LEVEL. When configuring Level units, the following parameters are set:
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April 2020 00809-0100-4797
• Measurement type: Level
• Linearization (Transducer Block): None
During unit configuration, the user defines scaling and units per the application
requirements. See Local Operator Interface (LOI) Menu for detailed menu for further
scaling help.
2.6.5 Level configuration using Class 2 Master
To configure the transmitter for a level application, use the level output in the Transducer
Block.
Procedure
1. From the Basic Setup → Units → Primary Value → Primary Value Type dropdown,
select Level.
2. Select units.
Note
Level units in steps 3.a, and 3.b must match.
3. From the Basic Setup → Units → Primary Value → Scale In (Transducer Block) →
Unit (Secondary Value 1) dropdown, select engineering unit.
a) From the Basic Setup → Units → Primary Value → Unit (PV) dropdown,
select engineering unit.
b) From the Basic Setup → Units → Output Signal (Analog Input Block) →
Unit (Out Scale) dropdown, select engineering unit.
4. Enter scaling.
Note
Scaling is done in the Transducer Block.
5. In the Basic Setup → Units → Primary Value → Scale In (Transducer Block) field,
enter upper and lower values (this value should correspond to the unit selected in
step Step 3).
a) In the Basic Setup → Units → Primary Value → Scale Out (Transducer
Block) field, enter upper and lower values (this value should correspond to
the unit selected in step 3.a).
6. Verify Analog Input (AI) Block.
Note
Scaling should not be repeated in the Al Block. To ensure no additional scaling is
being done on the Al Block, set the lower values in steps Step 7 and 7.a to 0 and the
upper values to 100.
7. In the Basic Setup → Units → Process Value Scale (Analog Input Block) field, enter
upper and lower values (this value should correspond to the unit selected in step
3.a).
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a) In the Basic Setup → Units → Output Signal (Analog Input Block) field,
enter upper and lower values (this value should correspond to the unit
selected in step 3.b).
b) From the Basic Setup → Units → Output Signal (Analog Input Block) →
Characterization Type dropdown, select No Linearization.
2.6.6 Damping
User-selected damping will affect the transmitters ability to respond to changes in the
applied process. The Rosemount 3051 has a default damping value of 0.0 seconds applied
in the analog input (AI) block.
Damping can be set using,
• LOI – see Table 2-1 and Figure 2-1
• Class 2 Master – see Damping configuration using Class 2 Master
Damping configuration using Class 2 Master
2.6.7
Procedure
• In the Basic Setup → Damping → Filter Time Const field, enter value (in seconds).
Process alerts
Process alerts activate an output alert status when the configured alert point is exceeded.
A process alert will be transmitted continuously if the output set points are exceeded. The
alert will reset once the value returns within range.
Process Alert parameters are defined as follows
• Upper alarm: Changes Output Status to Good – Critical Alarm – Hi Limit
• Upper warning: Changes Output Status to Good – Advisory Alarm – Hi Limit
• Lower warning: Changes Output Status to Good – Advisory Alarm – Lo Limit
• Lower alarm: Changes Output Status to Good – Critical Alarm – Lo Limit
• Alarm hysteresis: Amount the output value must pass back into range before alarm is
cleared.
Example
Upper alarm = 100 psi. Alarm hysteresis = 0.5 percent. After activation at 100 psi, the
alarm will clear once the output goes below 99.5 psi = 100 – 0.5 psi.
Process alerts can be set using a Class 2 Master.
Process alert configuration using Class 2 Master
Procedure
Enter process alerts.
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a) In the Basic Setup → Output → Output Limits → Upper Limit Alarm Limits field,
enter upper alarm value.
b) In the Basic Setup → Output → Output Limits → Upper Limit Warning Limits
field, enter upper warning value.
c) In the Basic Setup → Output → Output Limits → Lower Limit Alarm Limits field,
enter lower alarm value.
d) In the Basic Setup → Output → Output Limits → Lower Limit Warning Limits
field, enter lower warning value.
e) In the Basic Setup → Output → Output Limits → Limit Hysteresis field, enter a
percent of range value.
2.6.8
2.6.9
LCD display
The LCD display connects directly to the electronics board which maintains direct access
to the signal terminals. A display cover is provided to accommodate the display.
The display always indicates the transmitter output (Pressure, Flow or Level) as well as
abbreviated diagnostic status when applicable. Sensor temperature and pressure are
optional variables that can be configured using LOI or Class 2 Master. When turned on, the
display will alternate between the selected variables.
For LCD display configuration using,
• LOI – see Table 2-1 and Figure 2-1
• Class 2 Master – see LCD display configuration using Class 2 Master
LCD display configuration using Class 2 Master
Procedure
• In Basic Setup → Display Variables → Local Operator Interface (LOI) → Display
Selection, select the process variables to be shown on the local display.
Security
The Rosemount 3051 has a hierarchy of security features. The security jumper on the
electronics board (or optional LCD display) provides the highest level of security. With the
jumper in the ON position, all writes to the transmitter will be disabled (including writes
from the LOI or a Class 2 Master).
See Electrical Installation for details on jumper configuration.
2.6.10
18 Emerson.com/Rosemount
LOI security
To prevent unauthorized changes, either set the security jumper to ON and/or set an LOI
password (Refer to Configure security and simulation). The LOI password requires a user to
enter a non-zero four digit password at the transmitter in order to operate the LOI.
These parameters can be set using a Class 2 Master.
Reference Manual Configuration
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LOI security configuration using Class 2 Master
Procedure
1. To turn on the LOI password, enter value in the Basic Setup → Display Variables →
Local Operator Interface (LOI) → Password field.
2. To turn off the LOI password, enter 0 in the Basic Setup → Display Variables →
Local Operator Interface (LOI) → Password field.
Note
Security jumper must be in the off position for the LOI to operate. The password
appears after the LOI is activated using the local configuration buttons.
2.6.11 Simulation
The Rosemount 3051 has a simulation jumper located on the electronics board (or
optional LCD display) that must be set to the ON position in order to simulate.
With the AI Block simulation enabled, the actual measurement value has no impact on the
OUT value or the status.
Simulation configuration using Class 2 Master
Procedure
1. Set the simulation jumper to on.
2. To enable simulation, select the following in Basic Setup → Simulation:
a) Select Enabled.
b) Enter Simulation Value.
c) Select Simulation Status.
d) Select Transfer.
3. To disable simulation, select the following in Basic Setup → Simulation:
a) Select Disabled.
b) Select Transfer.
4. Set the simulation jumper to off.
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3 Hardware Installation
3.1 Section overview
The information in this section covers installation considerations for the Rosemount
3051 Pressure Transmitter with PROFIBUS® PA Protocol. A Quick Start Guide is shipped
with every transmitter to describe pipe-fitting, wiring procedures and basic configuration
for initial installation.
3.2 Safety messages
Procedures and instructions in this section may require special precautions to ensure the
safety of the personnel performing the operations. Information that raises potential safety
issues is indicated by a warning symbol ( ). Refer to the following safety messages before
performing an operation preceded by this symbol.
WARNING
™
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. Review the
approvals section of this Reference Manual for any restrictions associated with a safe
installation.
In an explosion-proof/flameproof installation, do not remove the transmitter covers
when power is applied to the unit.
Process leaks could result in death or serious injury.
Install and tighten process connectors before applying pressure.
Electrical shock could cause death or serious injury.
Avoid contact with the leads and terminals. High voltage that may be present on leads can
cause electrical shock.
3.3 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
tapered threads, install the plug wrench tight. For material compatibility considerations,
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see Material Selection and Compatibility Consideration Technical Note on Emerson.com/
Rosemount.
3.3.1 Mechanical considerations
Steam service
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.
Side mounted
When the transmitter is mounted on its side, position the coplanar flange to ensure proper
venting or draining. Mount the flange as shown in Mounting requirements, keeping drain/
vent connections on the bottom for gas service and on the top for liquid service.
3.3.2
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). Mount the transmitter so that it is not susceptible to vibration and
mechanical shock and does not have external contact with corrosive materials.
3.4 Installation procedures
3.4.1 Mount the transmitter
For dimensional drawing information, refer to Dimensional drawings.
Process flange orientation
Mount the process flanges with sufficient clearance for process connections. For safety
reasons, place the drain/vent valves so the process fluid is directed away from possible
human contact when the vents are used. In addition, consider the need for a testing or
calibration input.
Housing rotation
To improve field access to wiring or to better view the optional LCD display:
Procedure
1. Loosen the housing rotation set screw using a 5/64 -in. hex wrench.
2. Turn the housing left or right maximum up to 180° from its original position.
The Rosemount 3051C original position aligns with “H” side; Rosemount 3051T original position is the opposite side of
(1)
bracket holes.
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CAUTION
Over rotating can damage the transmitter.
3. Re-tighten the housing rotation set screw to no more than seven in-lb when desired
location is reached.
Figure 3-1: Housing Rotation
A. Housing rotation set screw (5/64 -in.)
Terminal side of electronics housing
Mount the transmitter so the terminal side is accessible. Clearance of 0.75-in. (19 mm) is
required for cover removal. Use a conduit plug on the unused side of the conduit opening.
Circuit side of electronics housing
Provide 0.75-in. (19 mm) of clearance for units without an LCD display. Provide 3-in. (76
mm) of clearance for units installed with LCD display.
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Conduit entry threads
For NEMA® 4X, IP66, and IP68 requirements, use thread seal (PTFE) tape or paste on male
threads to provide a watertight seal.
Environmental seal for housing
Thread sealing (PTFE) tape or paste on male threads of conduit is required to provide a
water/dust tight conduit seal and meets requirements of NEMA Type 4X, IP66, and IP68.
Consult factory if other Ingress Protection ratings are required.
For M20 threads, install conduit plugs to full thread engagement or until mechanical
resistance is met.
Always ensure a proper seal by installing electronics housing cover(s) so that metal
contacts metal. Use Rosemount O-rings.
Mounting brackets
Rosemount 3051 may be panel-mounted or pipe-mounted through an optional mounting
bracket. Refer to Table 3-1 for the complete offering and see Figure 3-2 through Figure 3-6
for dimensions and mounting configurations.
Table 3-1: Mounting Brackets
Option
code
B4 X X X X X X X
B1 X X X X
B2 X X X X
B3 X X X X
B7 X X X X
B8 X X X X
B9 X X X X
BA X X X X
BC X X X X
Process connections Mounting Materials
Coplanar In-line Traditional Pipe
mount
Panel
mount
Flat
Panel
mount
CS
bracket
SST
bracket
CS bolts SST
bolts
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Figure 3-2: Mounting Bracket Option Code B4
A. ⅜
x 1¼ -in. bolts for mounting to transmitter
–16
B.5/16 x 1½ -in. bolts for panel mounting (not supplied)
Dimensions are in inches (millimeters).
Figure 3-3: Mounting Bracket Option Codes B1, B7, and BA
Dimensions are in inches (millimeters).
Figure 3-4: Panel Mounting Bracket Option Codes B2 and B8
A. Mounting holes 0.375 diameter (10)
Dimensions are in inches (millimeters).
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Figure 3-5: Flat Mounting Bracket Option Codes B3 and BC
Dimensions are in inches (millimeters).
Flange bolts
Emerson can ship the Rosemount 3051 with a coplanar flange or a traditional flange
installed with four 1.75-in. flange bolts. Mounting bolts and bolting configurations for the
coplanar and traditional flanges can be found in Bolt installation. Stainless steel bolts
supplied by Emerson are coated with a lubricant to ease installation. Carbon steel bolts do
not require lubrication. Do not apply additional lubricant when installing either type of
bolt. Bolts supplied by Emerson are identified by their head markings.
Figure 3-6: Head Markings
A. Carbon steel (CS) head markings
B. Stainless steel (SST) head markings
C. Alloy K-500 head marking
Note
The last digit in the F593_head marking may be any letter between A and M.
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Bolt installation
Bolt installation procedure.
Only use bolts supplied with the Rosemount 3051 or sold by Emerson as spare parts for
the Rosemount 3051 Transmitter.
Note
Carbon steel bolts do not require lubrication and the stainless steel bolts are coated with a
lubricant to ease installation. However, no additional lubricant should be applied when
installing either type of bolt.
Procedure
1. Finger-tighten the bolts.
2. Torque the bolts to the initial torque value using a crossing pattern (see Table 3-2
for torque values).
3. Torque the bolts to the final torque value using the same crossing pattern.
Table 3-2: Bolt Installation Torque Values
Bolt material Initial torque value Final torque value
CS-ASTM-A445 Standard 300 in-lb (34 N-m) 650 in-lb (73 N-m)
316 SST—Option L4 150 in-lb (17 N-m) 300 in-lb (34 N-m)
ASTM-A-193-B7M—OptionL5300 in-lb (34 N-m) 650 in-lb (73 N-m)
Alloy 400—Option L6 300 in-lb (34 N-m) 650 in-lb (73 N-m)
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Figure 3-7: Traditional Flange Bolt Configurations
Differential transmitter Gage/Absolute transmitter
A. Drain/vent
B. Plug
Dimensions are in inches (millimeters).
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Figure 3-8: Mounting Bolts and Bolt Configurations for Coplanar Flange
Transmitter with flange bolts Transmitter with flange adapters and
flange/adapter bolts
Dimensions are in inches (millimeters).
Description
Differential pressure
Flange bolts 4 1.75 (44)
Flange/adapter bolts 4 2.88 (73)
Gage/absolute pressure
Flange bolts 4 1.75 (44)
Flange/adapter bolts 2 2.88 (73)
(1) Rosemount 3051T Transmitters are direct mount and do not require bolts for process
connection.
(1)
Qty Size (in. [mm])
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