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.
This manual is for the Rosemount 2051 Pressure Transmitter with FOUNDATION™ fieldbus
communications.
This manual only describes the topics required for installation, operation, configuration, and
troubleshooting the F
1.2Using this manual
The sections in this manual provide information on configuring, installing, operating and
maintaining, troubleshooting, and calibrating 2051 Transmitters specifically for F
fieldbus protocol.
Section 2: Configuration provides instruction on commissioning and operating 2051
Transmitters. Information on software functions, configuration parameters, and Online
variables is also included.
OUNDATION fieldbus transmitter.
Section 1: Introduction
October 2014
OUNDATION
Section 3: Hardware Installation contains mechanical installation instructions, and field
upgrade options.
Section 4: Electrical Installation contains electrical installation instructions, and field upgrade
options.
Section 5: Operation and Maintenance provides detailed information on calibrating the
transmitter
Section 6: Troubleshooting provides troubleshooting techniques for the most common
operating problems.
Appendix A: Specifications and Reference Data supplies reference and specification data, as well
as ordering information.
Appendix B: Product Certifications contains intrinsic safety approval information, European
ATEX directive information, and approval drawings.
1.3Models covered
The following 2051 Transmitters are covered by this manual:
Rosemount 2051C Coplanar
–Measures differential and gage pressure up to 2000 psi (137,9 bar).
–Measures absolute pressure up to 4000 psia (275,8 bar).
Rosemount 2051T In-Line Pressure Transmitter
™
Pressure Transmitter
Introduction
–Measures gage/absolute pressure up to 10000 psi (689,5 bar).
Rosemount 2051L Level Transmitter
–Measures level and specific gravity up to 300 psi (20,7 bar).
Rosemount 2051CF Series Flowmeter
–Measures flow in line sizes from
1
/2-in. (15mm) to 96-in. (2400 mm).
1
Section 1: Introduction
Start
1. Transmitter
installation
2.
Commissioning
tag
Done
Locate device
7. Zero trim the
transmitter
(Section 5.4)
3. Housing
rotation
5. Grounding,
6. Configuration
(Section 2.1)
wiring and
power up
(Section 4.6)
4. Set switches
and software
write lock
(Section 4.4)
(Section 3.7.4)
(Section 3.6)
(Section 3.7)
October 2014
Reference Manual
00809-0200-4101, Rev BA
1.4FOUNDATION fieldbus installation flowchart
Figure 1-1. FOUNDATION fieldbus Installation Flowchart
1.5Transmitter overview
The Rosemount 2051C Coplanar design is offered for Differential Pressure (DP), Gage Pressure
(GP) and Absolute Pressure (AP) measurements. The Rosemount 2051C utilizes capacitance
sensor technology for DP and GP measurements. The Rosemount 2051T and 2051CA utilize
piezoresistive sensor technology for AP and GP measurements.
The major components of the Rosemount 2051 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 and a memory module. 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 and the terminal block. The basic
block diagram of the Rosemount 2051CD is illustrated in Figure 1-3 on page 3.
For the Rosemount 2051, pressure is applied to the isolating diaphragm(s). The oil deflects the
sensor which then changes its capacitance or voltage signal. This signal is then changed to a
digital signal by the Signal Processing. The microprocessor then takes the signals from the
Signal Processing and calculates the correct output of the transmitter.
An optional 2-line LCD display can be ordered that connects directly to the interface board
which maintains direct access to the signal terminals. The display indicates output and
abbreviated diagnostic messages. A glass display cover is provided. The first line of eight
characters displays the actual measured value, the second line of six characters displays the
engineering units. The LCD display can also display diagnostic messages.
2
Introduction
Reference Manual
ABC
D
Signal Processing
Temp.
Sensor
Sensor Module
Memory
Microprocessor
*Sensor linearization
*Damping
*Diagnostics
*Engineering units
*Control function
blocks
*Communication
Memory
*Configuration
Digital
Communication
00809-0200-4101, Rev BA
Section 1: Introduction
October 2014
Figure 1-2. LCD Display
Figure 1-3. Block Diagram of Operation
A. Sensor Module
B. Electronics Board
OUNDATION fieldbus Signal to Control System
C. F
D. Field Communicator
1.6Service support
Within the United States, call the Emerson Process Management Instrument and Valve
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.
Introduction
3
Section 1: Introduction
October 2014
For inquiries outside of the United States, contact the nearest Emerson Process Management
representative for RMA instructions.
To expedite the return process outside of the United States, contact the nearest Emerson
Process Management representative.
Individuals who handle products exposed to a hazardous substance can avoid injury if they
are informed of and understand the hazard. The product being returned will require a copy
of the required Material Safety Data Sheet (MSDS) for each substance must be included
with the returned goods.
Emerson Process Management Instrument and Valve Response Center representatives will
explain the additional information and procedures necessary to return goods exposed to
hazardous substances.
Reference Manual
00809-0200-4101, Rev BA
1.7Host files
Before configuring the device, ensure the host has the appropriate Device Description (DD) or
Device Type Manager (DTM
www.fieldbus.org. The DTM can be found at www.emersonprocess.com. The current release of
the Rosemount 2051 with F
revision 2.
™
) file revision for this device. The device descriptor can be found on
OUNDATION fieldbus protocol is device revision 2. This manual is for
1.8Product recycling/disposal
Recycling of equipment and packaging should be taken into consideration and disposed of in
accordance with local and national legislation/regulations.
This section contains information on commissioning and tasks that should be performed on the
bench prior to installation, as well as tasks performed after installation.
Section 2: Configure
October 2014
2.1.1DD and DTM™ based interfaces
The 2051 Pressure Transmitter Rev 2 has both DD based and DTM based user interfaces
available. All device configuration and maintenance tasks can be performed using either
technology.
The DD capabilities supported will vary based on host supplier and host revision. Check with
your host supplier to determine and obtain the appropriate DD for your situation. The type of
DD your host supports may influence navigation between different functions, and the exact
steps used to perform different tasks. The device menu tree has multiple ways to navigate
between and perform tasks. Not all ways will be usable on all hosts, but at least one way will be
usable on every host.
2.1.2The device menu tree
Device information and device tasks are organized in a menu tree structure. The complete menu
tree is shown in Figure 2-10. A partial menu tree covering the most common device tasks is
shown in Figure 2-11.
2.1.3Basic organization
Device information and tasks are organized into three different menu tree branches. They are
Overview, Configure, and Service Tools. Information and tasks may be resident in more than a
single branch of the menu tree.
Configuration
The device menu tree is the landing screen for the Handheld user interface. The device menu
tree is also permanently displayed on PC based user interfaces. On PC based user interfaces the
menu tree can be expanded or collapsed as needed to facilitate navigation.
The same device menu tree applies for both handheld and PC based user interfaces. On the
handheld, each menu tree entry has a dedicated screen (see Figure 2-3). On PC based user
5
Section 2: Configure
October 2014
interfaces, several menu tree entries may be displayed on a single screen with each menu tree
entry used as the heading for a section of that screen (see Figure 2-2). The net result is the menu
tree can be used to navigate all DD’s and DTM’s, however the user may need to perform actions
on one screen, or several screens to perform the same task.
On devices with smaller screens the information and parameters necessary to complete a task
may be divided into several screens. In this figure each category of alert to be configured has a
dedicated screen shown. There are four total screens used for alert configuration.
Figure 2-2. Configure Device Alerts-Single Screen
On this PC based configuration screen, alert configuration for all four alert categories is
performed on a single screen.
2.1.4The Home Screen
The home screen provides access to the three main branches of the menu tree. These branches
are “Overview”, “Configure”, and “Service Tools”. From this screen select any of the three main
branches to access detailed device functionality.
6
Configuration
Reference Manual
Overview
Configure
Service Tools
(Overview)
Pressure
Calibration
Device Information
Locate Device
Scale Gauges
(Calibration)
Primary Value
Sensor Trim
Sensor Limits
Restore Factory Calibration
Last Calibration Points
Calibration Details
(Device Information)
Identification
Revisions
Materials of Construction
Security & Simulation
(Materials of Construction)
Sensor
Sensor Range
Flange
Remote Seal
(Security & Simulation)
Write Lock Setup
(Primary Value)
Change Damping
(Sensor Trim)
Upper
Lower
Zero
Restore
(Revisions)
Device Driver
Black Text – Navigation selections available
(Text) – Name of selection used on parent menu
screen to access this screen
Green Text – Automated methods
Red Text – Configuration task numbers from
configuration flow chart
00809-0200-4101, Rev BA
Figure 2-3. Home Screen Menu Tree Main Navigation Branches
2.1.5Overview
The overview branch of the menu tree provides device information and single keystroke
shortcuts to view variables and device status, access device diagnostics, and perform basic
calibration functions. The overview screen is the landing screen for PC based user interfaces.
Figure 2-4. Overview Section of the Menu Tree
Section 2: Configure
October 2014
2.1.6Configure
Figure 2-5. Guided Setup Branch of the Menu Tree
(Configure)
Guided Setup
Manual Setup
Alert Setup
The Configure branch of the menu tree provides both guided setup and manual setup. Guided
setup provides automated step by step methods for performing device configuration. Manual
setup provides user editable screens where the user can perform a configuration task by
selecting or entering the necessary parameters without step by step guidance.
Figure 2-6. Manual Setup Branch of the Menu Tree
(Manual Setup)
Process Variable
Materials of Construction
Analog Input Blocks Configuration
Black Text – Navigation selections available
(Text) – Name of selection used on parent menu
screen to access this screen
Green Text – Automated methods
Red Text – Configuration task numbers from
configuration flow chart
Display
Classic View
(Guided Setup)
Zero Trim
Change Damping
Local Display Setup
Configure Analog Input Blocks
(Materials of Construction)
Advanced Configuration
Black Text – Navigation selections available
(Text) – Name of selection used on parent menu
screen to access this screen
Green Text – Automated methods
Red Text – Configuration task numbers from
configuration flow chart
Black Text – Navigation selections available
(Text) – Name of selection used on parent menu
screen to access this screen
Green Text – Automated methods
Red Text – Configuration task numbers from
configuration flow chart
October 2014
Manual Setup can take less time than guided setup if the user is familiar with the task to be
performed. Manual Setup also allows users to edit specific parameters without needing to step
through all the setup steps. If the user is not familiar with a specific task, Guided Setup is
recommended so task steps are done in the correct order and all needed steps are performed.
Figure 2-7. Classic View of the Menu Tree
The Manual Setup branch also provides a view called ‘classic view’ which lists block parameters
in a single scroll-down menu. Expert users may prefer this view for configuration as multiple
configuration tasks can be performed without leaving the single menu screen.
Reference Manual
00809-0200-4101, Rev BA
Figure 2-8. Alert Setup Branch of the Menu Tree
(Alert Setup)
Device Alerts
Process Alerts
Diagnostic Alerts
Black Text – Navigation selections available
(Text) – Name of selection used on parent menu
screen to access this screen
Green Text – Automated methods
Red Text – Configuration task numbers from
configuration flow chart
(Device Alerts)
Enable Failure Alerts
Enable Out of Specification Alerts
Enable Maintenance Required Alerts
Enable Function Check Alerts
Suppressed Device Alerts
(Process Alerts)
Enable Failure Alerts
Enable Out of Specification Alerts
Enable Maintenance Required Alerts
Enable Function Check Alerts
Suppressed Process Alerts
(Diagnostic Alerts)
Enable Failure Alerts
Enable Out of Specification Alerts
Enable Maintenance Required Alerts
Enable Function Check Alerts
Suppressed Device Alerts
(Suppressed Device Alerts)
Failure Alerts
Out of Specification Alerts
Maintenance Required Alerts
Function Check Alerts
(Suppressed Process Alerts)
Failure Alerts
Out of Specification Alerts
Maintenance Required Alerts
Function Check Alerts
(Suppressed Diagnostic Alerts)
Failure Alerts
Out of Specification Alerts
Maintenance Required Alerts
Function Check Alerts
The final Configure branch supports alert setup of NE107 alerts (The factory default Device
Alerts), or PlantWeb
®
Alerts. Note that the diagnostics performed and the recommended
actions for NE107 Alerts and PlantWeb Alerts are identical. The only difference is that NE107
alerts and PlantWeb Alerts annunciate the alerts using different categories.
NE107 requires device manufacturers to provide a way for users to enable, suppress, and
re-categorize alerts. The Rosemount 2051 organizes alerts as “Device Alerts”, “Process Alerts”,
or “Diagnostic Alerts”. NE107 alerts can be defined as any of four categories. They are “Failure
Alerts”, Out of Specification Alerts”, Maintenance Required Alerts”, and “Function Check
Alerts”. To minimize configuration tasks and time, the Rosemount 2051 ships from the factory
with alerts enabled and pre-categorized. The use of factory default categories is recommended
if the defaults meet plant standards, and there is no identified benefit to changing categories.
Note
The NE107 specification allows a single alert to be included in multiple categories. As a general
8
practice this is not recommended as alarm management can become needlessly complex.
Configuration
Reference Manual
00809-0200-4101, Rev BA
NE107 alerts can be suppressed. If an alert is configured to reside in multiple categories, it can
be suppressed in some categories, but not others. To completely suppress an alert it must be
suppressed in every category where it is configured.
2.1.7Service Tools
Section 2: Configure
October 2014
Figure 2-9. Service Tools
(Service Tools)
Alerts
Variables
Trends
Maintenance
Simulate
Black Text – Navigation selections available
(Text) – Name of selection used on parent menu
screen to access this screen
Green Text – Automated methods
Red Text – Configuration task numbers from
configuration flow chart
(Variables)
Pressure
Sensor Temperature
(Simulate)
Simulate Alerts
Enable / Disable Alert Simulations
(Trends)
Pressure
Sensor Temperature
(Maintenance)
Calibrate
Reset / Restore
(Reset / Restore)
Master Reset
Restore Factory Cal
(Calibrate)
Primary Value
Pressure Unit Conversion
Change Damping
Sensor Trim
Upper / Lower / Zero
Restore
Sensor Limits
Last Calibration Point
Calibration Details
The Service Tools branch of the menu tree allows users to perform typical device maintenance
tasks, simulate alerts and parameters, and perform some configuration resets to return devices
to as-manufactured settings.
Black Text – Navigation selections available
(Text) – Name of selection used on parent menu
screen to access this screen
Green Text – Automated methods
Red Text – Configuration task numbers from
configuration flow chart
October 2014
Figure 2-10. Complete Menu Tree
Reference Manual
00809-0200-4101, Rev BA
10
Configuration
Reference Manual
00809-0200-4101, Rev BA
Figure 2-11. Partial Menu Tree
(Overview)
Pressure
Calibration
Device Information
Locate Device
Scale Gauges
(Calibration)
Primary Value
Sensor Trim
Sensor Limits
Restore Factory Calibration
Last Calibration Points
Calibration Details
Section 2: Configure
October 2014
(Configure)
Guided Setup
Manual Setup
Alert Setup
(Device Information)
Identification (1)
Revisions
Materials of Construction
Security & Simulation
(Guided Setup)
Zero Trim
Change Damping (7. 9)
Local Display Setup (8, 9)
Configure Analog Input Blocks (3, 4, 5, 6,9)
(Manual Setup)
Process Variable
Materials of Construction
Display
Classic View
(Classic View) (9)
View All Parameters
Mode Summary
AI Blocks Channel Mapping
Master Reset
(Materials of Construction)
Sensor
Sensor Range
Flange
Remote Seal
(Security & Simulation)
Write Lock Setup (2, 10)
(Process Variable)
Pressure
Pressure Damping
Sensor Temperature
Change Damping (8, 10)
(Display)
Display Options (8, 9)
Advanced Configuration
Note that some tasks can be performed from multiple locations on the menu tree. This is done
to allow users to perform related tasks with a minimum of screen changes and keystrokes. The
organization of the device menu tree is further described below.
2.1.8Navigation
Navigation is performed by clicking on the navigation button labeled with the task the user
wishes to perform. This takes the user to the next navigation screen, or the screen where the
desired function is performed, or launches a guided configuration automated procedure.
Configuration
Black Text – Navigation selections available
(Text) – Name of selection used on parent menu
screen to access this screen
Green Text – Automated methods
Red Text – Configuration task numbers from
configuration flow chart
11
Section 2: Configure
October 2014
Note that some tasks can be performed from several different locations in the menu tree. For
example, a “Sensor Zero Trim” can be performed from the “Overview” branch, the “Configure,
Guided Setup” branch, or the “Ser vice Tools” branch. This allows users to perform multiple tasks
while minimizing the total navigation required to access and use the desired functions.
Guided setup with automated task procedures (methods)
Guided Setup provides automated task procedures for tasks which require multiple steps to
perform. Guided setup also provides notification of recommended actions such as suggesting
the device user contact control room personnel to have the process loop placed in manual mode
prior to configuration.
Guided Setup will generally proceed in three stages. The first is preparation. In this stage user
notifications are given, and steps needed to prepare the device for task setup are performed.
The second is task execution where the task is performed in a series of steps. Sometimes the
number and sequence of steps is changed based on the values or parameters selected. This
eliminates the need for the user to understand and track how each configuration choice may
influence what can be done in succeeding steps. The third task is post-setup processing. In this
step actions needed to return the device to operation, or gracefully cancel a task are performed.
Guided setup handles mode management as part of preparation and post processing. This
means blocks that must be placed in manual or out of service mode for configuration will be
placed in those modes, and upon completion of the configuration task, will return those blocks
to the normal operating mode.
Reference Manual
00809-0200-4101, Rev BA
Guided setup will help the user complete tasks with the highest probability of success, and
gracefully terminate partially completed tasks by returning device parameters to the values that
existed before the terminated task was started. Users who are not very familiar with a device
should consider using Guided Configuration first.
Manual setup with manual and automated task procedures
Manual Setup should be used by users who are familiar with the mode changes and
configuration steps needed to complete a task and properly return the device to service. Manual
Setup is also sometimes used where a single parameter needs to be changed, and the user
doesn’t want to execute the full sequence of steps that are part of Guided Configuration.
Manual Setup can sometimes be performed in less time than Guided Setup, however Manual
Setup doesn’t provide the comprehensive guidance or graceful task termination of Guided
Setup. Users who are very familiar with tasks and wish to perform them in the least time should
consider using Manual Setup.
2.1.9Classic View
Classic View provides an alternate way to view parameters and perform manual setup. In the
Classic View, the individual screens used for Manual Setup are replaced by a single scrollable list
of parameters. The Classic View reduces screen to screen navigation to a minimum, but requires
that the user know all the parameters which need to be used, and the order of those
parameters, to perform each task. The user also needs to know how to manage modes, both to
perform tasks, and to return devices to operation.
12
Expert users will use Classic View to review all block parameters, and to perform some
configuration or service tasks. Classic View is NOT recommended for anyone who is not a device
and F
OUNDATION fieldbus expert.
Configuration
Reference Manual
00809-0200-4101, Rev BA
Control function block configuration
The 2051 uses standard control function blocks. Configuration of these function blocks, and
linking them into control strategies is performed on the control host using the configuration
screens and tools specific to that control host. To configure control function blocks and use
those in control strategies consult your control host users’ documentation.
The 2051 device configuration tools support configuration of Analog Input Blocks as needed to
select the channel and perform signal conditioning and scaling. The 2051 ships from the factory
with Analog Input Block 1 linked to the Primary Variable of the transducer block, and scheduled
to run. This is necessary to configure signal conditioning and scaling. The user is encouraged to
use Analog Input Block 1 for the Primary Variable when configuring control strategies.
2.2Safety 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.
Section 2: Configure
October 2014
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 field 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.
2.2.1Confirm correct device driver
Verify the latest Device Driver (DD/DTM) is loaded on your systems to ensure proper
communications.
1.Download the latest DD at www.emersonprocess.com or www.fieldbus.org.
2. In the Browse by Member dropdown menu, select Rosemount business unit of Emerson
Process Management.
Configuration
3. Select desired product.
a.Within Tab l e 2- 1 , use the Device Revision numbers to find the correct Device Driver.
13
Section 2: Configure
October 2014
Reference Manual
00809-0200-4101, Rev BA
Table 2-1. Rosemount 2051 F
Device
revision
2
1
(1) FOUNDATION fieldbus device revision can be read using a FOUNDATION fieldbus capable configuration tool.
(2) Device driver file names use device and DD revision. To access functionality, the correct device driver must be installed on your control and asset
management hosts, and on your configuration tools.
AMS V 10.5 or higher:
OUNDATION fieldbus Device Revisions and Files
(2)
Obtain atDevice driver (DTM)
DD Rev 2
AMS V 8 to 10.5:
DD Rev 1
AMS Rev 8 or higher:
DD Rev 2
www.emersonprocess.com
www.emersonprocess.com
www.emersonprocess.com
www.emersonprocess.com
www.emersonprocess.com
Manual document
number
00809-0200-4101
Rev. BA or newer
00809-0200-4101
2.3Device capabilities
2.3.1Link active scheduler
Rev. AA
The Rosemount 2051 can be designated to act as the backup Link Active Scheduler (LAS) in the
event that the LAS is disconnected from the segment. As the backup LAS, the 2051 will take
over the management of communications until the host is restored.
The host system may provide a configuration tool specifically designed to designate a particular
device as a backup LAS.
2.3.2Capabilities
Virtual Communication Relationship (VCRs)
There are a total of 20 VCRs. Two are permanent and 18 are fully configurable by the host
system. Twenty-five link objects are available.
Network parameterValue
Slot Time6
Maximum Response Delay4
Maximum Inactivity to Claim LAS Delay47
Minimum Inter DLPDU Delay7
Time Sync class4 (1ms)
Maximum Scheduling Overhead21
Per CLPDU PhL Overhead4
Maximum Inter-channel Signal Skew0
Required Number of Post-transmission-gab-ext Units0
Required Number of Preamble-extension Units1
14
Configuration
Reference Manual
00809-0200-4101, Rev BA
Host timer recommendations
T1 = 96000
T2 = 9600000
T3 = 480000
Table 2-2. Block Execution Times
BlockTime (in ms)
Analog Input20
PID25
Arithmetic20
Input Selection20
Signal Characterizer20
Integrator20
Output Splitter20
Control Selector20
2.4Node address
Section 2: Configure
October 2014
The transmitter is shipped at a temporary (248) address. This enables FOUNDATION fieldbus host
systems to automatically recognize the device and move it to a permanent address.
2.5General block information
2.5.1FOUNDATION fieldbus function blocks
Reference information on the process control function blocks can be found in the Function Block
manual document number 00809-0100-4783.
Resource block
The Resource block contains diagnostic, hardware and electronics information. There are no
linkable inputs or outputs to the Resource Block.
Sensor transducer block
The Sensor Transducer Block contains sensor information including the sensor diagnostics and
the ability to trim the pressure sensor or recall factory calibration.
LCD display transducer block
Configuration
The LCD Display Transducer Block is used to configure the LCD display meter.
Analog input block
The Analog Input (AI) Function Block processes the measurements from the sensor and makes
them available to other function blocks. The output value from the AI block is in engineering
units and contains a status indicating the quality of the measurement. The AI block is widely
used for scaling functionality.
15
Section 2: Configure
October 2014
Note
The channel, Set XD_Scale, Set L_Type, and sometimes Set Out_Scale are typically configured
by instrument personnel. Other AI block parameters, block links, and schedule are typically
configured by the control systems configuration engineer.
Input selector block
The Input Selector (ISEL) Function Block can be used to select the first good, Hot Backup™,
maximum, minimum, or average of as many as eight input values and place it at the output. The
block supports signal status propagation.
Integrator block
The Integrator (INT) Function Block integrates one or two variables over time. The block
compares the integrated or accumulated value to pre-trip and trip limits and generates discrete
output signals when the limits are reached.
The Integrator Block is used as a totalizer. This block will accept up to two inputs, has six options
how to totalize the inputs, and two trip outputs.
Reference Manual
00809-0200-4101, Rev BA
Arithmetic block
The Arithmetic (ARTH) Function Block provides the ability to configure a range extension
function for a primary input. It can also be used to compute nine different arithmetic functions
including flow with partial density compensation, electronic remote seals, hydrostatic tank
gauging, ratio control and others.
Signal characterizer block
The Signal Characterizer (SGCR) Function Block characterizes or approximates any function that
defines an input/output relationship. The function is defined by configuring as many as twenty
X,Y coordinates. The block interpolates an output value for a given input value using the curve
defined by the configured coordinates. Two separate analog input signals can be processed
simultaneously to give two corresponding separate output values using the same defined curve.
PID block
The PID Function Block combines all of the necessary logic to perform proportional/integral/derivative (PID) control. The block supports mode control, signal scaling and limiting, feed
forward control, override tracking, alarm limit detection, and signal status propagation.
The block supports two forms of the PID equation: Standard and Series. You can choose the
appropriate equation using the MATHFORM parameter. The Standard ISA PID equation is the
default selection.
16
Control selector block
The Control Selector (CSEL) Function Block selects one of two or three inputs to be the output.
The inputs are normally connected to the outputs of PID or other function blocks. One of the
inputs would be considered Normal and the other two overrides.
Configuration
Reference Manual
00809-0200-4101, Rev BA
Output splitter block
The Output Splitter (OSPL) Function Block provides the capability to drive two control outputs
from a single input. It takes the output of one PID or other control block to control two valves or
other actuators.
Function Blocks with default block index numbers up to 1500 are permanent. Function Blocks
with default block indexes 1600 and higher are instantiated and can be deleted by the user.
2.5.2Modes
The Resource, Transducer, and all function blocks in the device have modes of operation. These
modes govern the operation of the block. Every block supports both automatic (AUTO) and out
of service (OOS) modes. Other modes may also be supported.
Changing modes
To change the operating mode, set the MODE_BLK.TARGET to the desired mode. After a short
delay, the parameter MODE_BLK.ACTUAL should reflect the mode change if the block is
operating properly. Appropriate resource, transducer, and Analog Input block mode changes
are made by the automated procedures (Methods) for most configuration tasks.
Permitted modes
It is possible to prevent unauthorized changes to the operating mode of a block. To do this,
configure MODE_BLK.PERMITTED to allow only the desired operating modes. It is
recommended to always select OOS as one of the permitted modes.
Types of modes
Configuration
For the procedures described in this manual, it will be helpful to understand the following
modes:
17
Section 2: Configure
Resource Block
Tra ns duc er
Block
Analog Input
(AI Block)
Other
function
blocks
October 2014
AUTO
The functions performed by the block will execute. If the block has any outputs, these will
continue to update. This is typically the normal operating mode.
Out of Service (OOS)
The functions performed by the block will not execute. If the block has any outputs, these will
typically not update and the status of any values passed to downstream blocks will be “BAD”. To
make some changes to the configuration of the block, change the mode of the block to OOS.
When the changes are complete, change the mode back to AUTO.
MAN
In this mode, variables that are passed out of the block can be manually set for testing or
override purposes.
Other types of modes
Other types of modes are Cas, RCas, ROut, IMan and LO. Some of these may be supported by
different function blocks in the Rosemount 2051. For more information, see the Function Block
manual, document 00809-0100-4783.
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00809-0200-4101, Rev BA
Mode propagation
Note
When an upstream block is set to OOS, this will impact the output status of all downstream
blocks. The figure below depicts the hierarchy of blocks:
2.5.3Block instantiation
The Rosemount 2051 supports the use of Function Block Instantiation. When a device supports
block instantiation, the number of blocks and block types can be defined to match specific
application needs.The number of blocks that can be instantiated is only limited by the amount
of memory within the device and the block types that are supported by the device. Instantiation
does not apply to standard device blocks like the Resource, Sensor Transducer, and LCD Display
Transducer Blocks.
Block instantiation is done by the host control system or configuration tool, but not all hosts are
required to implement this functionality. Please refer to your specific host or configuration tool
manual for more information.
2.5.4Simulation
Simulation is the functionality of the AI block. There are two ways to simulate values as follows:
18
Configuration
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1.Change the mode of the block to manual and adjust the output value.
2. Enable simulation through the configuration tool and manually enter a value for the
measurement value and its status (this single value will apply to all outputs).
In both cases, first set the ENABLE switch on the field device.
With simulation enabled, the actual measurement value has no impact on the OUT value or the
status. The OUT values will all have the same value as determined by the simulate value.
2.6Resource block
2.6.1FEATURES and FEATURES_SEL
The FEATURES parameter is read only and defines which host accessible features are supported
by the 2051. Below is a list of the FEATURES the 2051 supports. See Appendix A: Specifications
and Reference Data for the complete list.
Section 2: Configure
October 2014
Reference the feature list in the parameter table in Appendix A: Specifications and Reference
Data .
FEATURES_SEL is used to turn on any of the supported features that are found in the FEATURES
parameter. The default setting of the Rosemount 2051 does not select any of these features.
Choose one or more of the supported features if any.
UNICODE
All configurable string variables in the 2051, except tag names, are octet strings. Either ASCII or
Unicode may be used. If the configuration device is generating Unicode octet strings, you must
set the Unicode option bit.
REPORTS
The 2051 supports alert reports. The Reports option bit must be set in the features bit string to
use this feature. If it is not set, the host must poll for alerts. If this bit is set, the transmitter will
actively report alerts.
SOFT W LOCK and HARD W LOCK
Inputs to the security and write lock functions include the hardware security switch, the
hardware and software write lock bits of the FEATURE_SEL parameter, and the WRITE_LOCK
parameter.
Configuration
The WRITE_LOCK parameter prevents modification of parameters within the device except to
clear the WRITE_LOCK parameter. During this time, the block will function normally updating
inputs and outputs and executing algorithms. When the WRITE_LOCK condition is cleared, a
WRITE_ALM alert is generated with a priority that corresponds to the WRITE_PRI parameter.
The FEATURE_SEL parameter enables the user to select any one of the following: a hardware
write lock, a software write lock, or no write lock capability. To enable the hardware security
function, enable the HARD W LOCK bit in the FEATURE_SEL parameter. When this bit has been
enabled the WRITE_LOCK parameter becomes read only and will reflect the state of the
19
Section 2: Configure
October 2014
hardware switch. In order to enable the software write lock, place the hardware write lock
switch in the unlocked position. Then the SOFT W LOCK bit must be set in the FEATURE_SEL
parameter. Once this bit is set, the WRITE_LOCK parameter may be set to “Locked” or “Not
Locked.” Once the WRITE_LOCK parameter is set to “Locked” by either the software or the
hardware lock, all user requested writes shall be rejected.
2.6.2MAX_NOTIFY
The MAX_NOTIFY parameter value of 7 is the maximum number of alert reports that the
resource can have sent without getting a confirmation from the host, corresponding to the
amount of buffer space available for alert messages. The number can be set lower, to control
alert flooding, by adjusting the LIM_NOTIFY parameter value. If LIM_NOTIFY is set to zero, then
no alerts are reported.
2.6.3Alerts/alarms
Note
See “Damping” on page 38 for Alert Configuration.
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The 2051 Rev 2 pressure transmitter supports both PlantWeb Alerts and NE107 alerts. All alerts
are configured, masked, and mapped as NE 107 Status Signals. If the control host is DeltaV
version 11.5 or older alerts are automatically annunciated as PlantWeb Alerts. No user
configuration is needed for this conversion.
The alerts and recommended actions should be used in conjunction with Section 6: Trouble-
shooting. See “Resource block” on page 97for more information on resource block parameters.
The Resource Block will act as a coordinator for alerts. Depending on user configuration each
device will have either three or four alert Parameters. If PlantWeb alerts are configured, the
three alert parameters will be (FAILED_ALARM, MAINT_ALARM, and ADVISE_ALARM). If NE107
alerts are configured the four alert parameters will be (FD_FAIL_ACTIVE, FD_OFFSPEC_ACTIVE,
FD_MAINT_ACTIVE, and FD_CHECK_ACTIVE).
Note
NE107 alerts and PlantWeb Alerts annunciate the same diagnostics and display the same
recommended actions. The only difference in the alerts reported is the parameters used to
annunciate the alert conditions. The default factory configuration has NE107 alerts enabled.
Alerts processing within the device
1.Diagnostics perform comprehensive checks and update status within the device. These
status conditions allow the user to troubleshoot probable causes and take corrective
actions.
20
2. The status conditions are then mapped into four status signals that can be used for
annunciation on the segment to the host.
3. Before annunciation a check is made to determine if the user has masked any alert
parameters. Any masked parameters will not be annunciated to the host, but will be visible
using the device DD or DTM.
4. Unmasked alert conditions are annunciated by the appropriate status signal to the host.
Configuration
Reference Manual
1. Detailed status includes
conditions found by all
diagnostics the device
runs.
Detailed status for
NE 107 and PlantWeb
alerts are identical.
2. Consolidated status
groups diagnostics by
probable cause and
corrective action.
Consolidated status for
NE 107 and PlantWeb
alerts are identical.
3. Mapping of conditions
defines how conditions will
be reported. NE 107
mapping can be user
modified.
4. Masking of conditions
determines which
conditions
are reported to
the host and which are not
by status signal. All
status signals remain
5. Unmasked active
conditions are reported to
the host. The unmasked
or PlantWeb Alert
Sensor Status condition 1
Detailed Status
Sensor Status condition N
Electronics Status condition
1
Electronics Status condition
N
Extended Sensor Status
condition
“Sensor Failure”
Extended Electronics
Status condition
“Electronics Failure”
Additional Status
conditions
User Actionable
Consolidated Status
Mapping of Status
Conditions to Status
Signals
FD _FAIL _MAP
FD _MAINT _MAP
Additional Status
Signals Mapped
Masking of Alert Parameters
FD _MAINT _MASK
Alert Conditions reported to host
as NE 107 Status Signals or
Sensor Failure
Electronics Failure
Additional Alert Conditions
by Status Signal
within each status signal
diagnostic conditions and
visible within the device.
conditions are reported by
status signal categories
categories.
PlantWeb Alerts
FD _OFFSPEC
ADVISE
FAILED
FD _CHECK
FD _FAIL
FD _MAINT
MAINT
NE 107 Status SignalPlantWeb Alert
00809-0200-4101, Rev BA
PlantWeb Alerts and NE107 alerts are both processed using the steps described above, and
annunciate the same consolidated status parameters.
Figure 2-12. NE107 Alert Processing Diagram
Section 2: Configure
October 2014
Figure 2-13. NE 107 Status Signal to PlantWeb Alert Mapping
The alert priority enumeration value
Alerts have priorities that determine if they occur, and where and how they are annunciated.
NE107 Status Signals and PlantWeb Alerts use the same priorities and annunciate the same
ways.
Configuration
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Section 2: Configure
October 2014
0 = Alerts will not occur. If there is an existing alert and the priority is changed from a number
greater than zero to zero the alert will clear. Active device diagnostics are still shown within the
Device Description even if the alert has been cleared.
1 = The associated alert is not sent as a notification. If the priority is above 1, then the alert must
be reported.
2 = Reserved for alerts that do not require the attention of a plant operator, e.g. diagnostic and
system alerts. Block alert, error alert, and update event have a fixed priority of 2.
NE107 has four alert parameters. They are in order from highest to lowest priority:
1.FD_FAIL_ACTIVE
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2. FD_OFFSPEC_ACTIVE
3. FD_MAINT_ACTIVE
4. FD_CHECK_ACTIVE
Any of the seven alert conditions can be user configured to annunciate as any of the four alert
parameters. Individual alert conditions can also be mapped into multiple alert parameters.
Alert parameter definitions and factory defaults
Note
All seven alert conditions are factory assigned to appropriate alert parameters. Change the
parameter assignment of individual alert conditions only if needed.
Devices are shipped from the factory with all applicable alerts enabled. The factory default alert
conditions reported in each parameter are:
1.FD_FAIL_ACTIVE
a.Incompatible module
b. Sensor failure
c.Electronics failure
A FD_FAIL_ACTIVE alert indicates a failure within a device that will make the device or some part
of the device non-operational. This implies that the process variable may no longer be available
and the device is in need of immediate repair.
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2. FD_OFFSPEC_ACTIVE
A FD_OFFSPEC_ACTIVE alert indicates that the device is experiencing pressure or temperature
conditions that are outside the device operating range. This implies that the process variable
may no longer be accurate. It also implies that if the condition is ignored the device will
eventually fail.
3. FD_MAINT_ACTIVE
A FD_MAINT_ACTIVE alert indicates the device is still functioning but an abnormal device
condition exists. The device should be checked to determine the type of abnormal condition
and recommended actions to resolve it.
4. FD_CHECK_ACTIVE
Section 2: Configure
October 2014
a.Pressure out of limits
b. Sensor temperature out of limits
a.Display update failure
a.Function check
A FD_CHECK_ACTIVE alert indicates a transducer block is not in “Auto” mode. This may be due
to configuration or maintenance activities.
Mapping alert conditions
Any of the alert conditions can be mapped into any of the NE107 alert parameters. This is done
using the following parameters.
1.FD_FAIL_MAP assigns a condition to FD_FAIL_ACTIVE.
2. FD_OFFSPEC_MAP assigns a condition to FD_OFFSPEC_ACTIVE.
3. FD_MAINT_MAP assigns a condition to FD_MAINT_ACTIVE.
4. FD_CHECK_MAP assigns a condition to FD_CHECK_ACTIVE.
Masking alert conditions
Any combination of alert conditions can be masked. When a status signal is masked, it will not
be annunciated to the host system but will still be active in the device and viewable in the device
DD or DTM. The recommended action, FD_RECOMMEN_ACT will continue to show the
recommended action for the most severe condition or conditions detected as determined by
the condition priority. This allows maintenance personnel to view and correct device conditions
without annunciating the conditions to operational staff. They are masked using the following
parameters:
Configuration
1.FD_FAIL_MASK to mask FD_FAIL_ACTIVE conditions
2. FD_OFFSPEC_MASK to mask FD_OFFSPEC_ACTIVE conditions
3. FD_MAINT_MASK to mask FD_MAINT_ACTIVE conditions
4. FD_CHECK_MASK to mask FD_CHECK_ACTIVE conditions
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Section 2: Configure
October 2014
If a consolidated diagnostic condition is configured to annunciate in multiple status signal
categories it can be masked in one or several status signal categories, but left active and
annunciate in others. This provides significant flexibility but can lead to confusion when
responding to alerts. Generally alert conditions are assigned to only a single status signal.
Alert priorities
NE107 alerts can have any of 16 different condition priorities ranging from the lowest priority of
0 to the highest priority of 15. This is done using the following parameters.
1.FD_FAIL_PRI to specify the priority of FD_FAIL_ACTIVE conditions
2. FD_OFFSPEC_PRI to specify the priority FD_OFFSPEC_ACTIVE conditions
3. FD_MAINT_PRI to specify the priority FD_MAINT_ACTIVE conditions
4. FD_CHECK_PRI to specify the priority FD_CHECK_ACTIVE conditions
Note
F
at manufacturing.
Zero priority behavior shows any active device diagnostics in the DD or DTM but alerts are not
generated based on the diagnostic conditions or published on the bus.
An alert priority of 2 or higher is required for every status signal category where status signals
are to be published on the bus.
Check with your host provider to determine the alarm priorities assigned to each status signal
category by your host. Manual configuration may be required.
DeltaV
The status signal priority determines the behavior of both real and simulated alerts.
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OUNDATION fieldbus standards require that NE 107 alert priority is set to zero for all status signals
™
assigns a priority of two or higher. The priority is based on status signal category.
2.6.4PlantWeb alerts overview
Alerts are generated, mapped, and masked as NE 107 Status Signals. If PlantWeb alerts are
required the NE 107 Status Signals are automatically converted to PlantWeb Alerts for
annunciation and display. PlantWeb alerts have three alert parameters. They are in order from
highest to lowest priority:
1.FAILED_ALM
2. MAINT_ALM
3. ADVISE_ALM
The eight alert conditions are factory configured to annunciate as one of the three specific alert
parameters.
PlantWeb alert parameter conditions and factory defaults
Devices are shipped from the factory with all applicable alerts enabled. The alert conditions
reported in each parameter are:
1.FAILED_ALM
a.Incompatible module
b. Sensor failure
c.Electronics failure
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Configuration
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A FAILED_ALM indicates a failure within a device that will make the device or some part of the
device non-operational. This implies that the process variable may no longer be available and
the device is in need of immediate repair.
2. MAINT_ALM
A MAINT_ALM indicates that the device is experiencing pressure or temperature conditions that
are outside the device operating range. This implies that the process variable may no longer be
accurate. It also implies that if the condition is ignored the device will eventually fail. The device
should be checked to determine the type of abnormal condition and recommended actions to
resolve it.
3. ADVISE_ALM
An ADVISE_ALM indicates a transducer block is not in “Auto” mode. This may be due to
configuration or maintenance activities. It can also indicate an abnormal process or device
condition exists. The device should be checked to determine the type of abnormal condition
and recommended actions to resolve it.
Section 2: Configure
October 2014
a.Pressure out of limits
b. Sensor temperature out of limits
a.Function check
b. Display update failure
PlantWeb alert priorities
PlantWeb alert priorities are configured in DeltaV. PlantWeb Alerts can have any of 16 different
condition priorities ranging from the lowest priority of 0 to the highest priority of 15. This is
done using the following parameters.
1.FAILED_PRI to specify the priority of FAILED_ALM
2. MAINT_PRI to specify the priority of MAINT_ALM
3. ADVISE_PRI to specify the priority of ADVISE_ALM
PlantWeb alert priority is configured using DeltaV and is not part of the Device Description
functionality.
2.7Basic device setup
Set all transmitter hardware adjustments during commissioning to avoid exposing the
transmitter electronics to the plant environment after installation.
Note
The information contained within Section 2.7-Basic device setup is the same as in the Quick
Start Guide. Reference Section 2.8-Analog Input (AI) function block through Section
2.9-Advanced device setup for more detailed configuration information.
Configuration
25
Section 2: Configure
October 2014
2.7.1Configure
Each FOUNDATION fieldbus host or configuration tool has a different way of displaying and
performing configurations. Some use Device Descriptions (DD) or DD methods for
configuration and to display data consistently across platforms. There is no requirement that a
host or configuration tool support these features. Use the following block examples to do basic
configuration to the transmitter. For more advanced configurations, reference Section
2.8-Analog Input (AI) function block through Section 2.9-Advanced device setup in this
manual.
Note
DeltaV users should use DeltaV Explorer for the Resource and Transducer blocks and Control
Studio for the Function Blocks.
AI block quick configuration
The screens used for each step are shown in Figure 2-14, Basic Configuration Menu Tree. In
addition, step-by-step instructions for each step of AI block configuration are provided in Figure
2-14 on page 26.
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00809-0200-4101, Rev BA
Figure 2-14. Basic Configuration Menu Tree
(Overview)
Pressure
Calibration
Device Information
Locate Device
Scale Gauges
(Configure)
Guided Setup
Manual Setup
Alert Setup
(Calibration)
Primary Value
Sensor Trim
Sensor Limits
Restore Factory Calibration
Last Calibration Points
Calibration Details
(Device Information)
Identification (1)
Revisions
Materials of Construction
Security & Simulation
(Guided Setup )
Zero Trim
Change Damping (7, 9)
Local Display Setup (8, 9)
Configure Analog Input Blocks (3, 4, 5, 6, 9)
(Manual Setup )
Process Variable
Materials of Construction
Display
Clas
s
ic View
(Classic View )(9)
View All Parameters
Mode Summary
AI Blocks Channel Mapping
Master Reset
(Materials of Construction )
Sensor
Sensor Range
Flange
Remote Seal
(Security & Simulation)
Write Lock Setup (2, 10)
(Process Variable )
Pressure
Pressure Damping
Sensor Temperature
Standard Text – Navigation selections available
(Text) – Name of selection used on parent menu screen to access this screen
Bold Text – Automated methods
Underlined Text -- Configuration task numbers from configuration flow chart
Configuration
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Figure 2-15. Configuration Flowchart
Section 2: Configure
October 2014
Start
Device Configuration
Here
1. Verify Device Tag:
PD_TAG
2. Check Switches and
Software Write Lock
3. Se t Sig nal
Conditioning:
L_TYPE
4. Set Scaling
XD_SCALE
5. Set Scaling
OUT_SCALE
6. Set Low Cutoff:
LOW_CUT
7. Set Damping:
PRIMARY_VALUE_
DAMPING
8. Set up LCD Display
9. Review Transmitter
Configuration
10. Set Switches and
Software Write Lock
Done
Before you begin
See Figure 2-14 to graphically view the step by step process for basic device configuration.
Before beginning configuration you may need to verify the Device Tag or deactivate hardware
and software write protection on the transmitter. To do this follow Step 1 through Step b below.
Otherwise continue at “Section -AI block configuration ” below.
1.To verify the device tag:
a.Navigation: from the overview screen, select “Device Information” to verify the device
tag.
2. To check the switches (see Figure 2-28):
a.The write lock switch must be in the unlocked position if the switch has been enabled in
software.
b. To disable the Software Write Lock (devices ship from the factory with the software
write lock disabled):
Navigation: from the overview screen, select “Device Information” and then select
the “Security and Simulation” tab.
Perform “Write Lock Setup” to disable Software Write Lock.
Note
Place the control loop in “Manual” mode before beginning Analog Input Block configuration.
AI block configuration
Note
Always check and reconcile function block configuration (with the exception of Resource and
Transducer blocks) after commissioning the transmitter to the control host. Function block
configuration, including AI blocks, made prior to device commissioning to the control host may
not be saved to the control host database during the commissioning process. In addition, the
control host may download configuration changes to the transmitter as part of the
commissioning process.
Configuration
27
Section 2: Configure
October 2014
Note
Changes to the AI block configuration performed after the transmitter is commissioned are
typically performed using the control host configuration software. Consult your host system
documentation to see if the AI Block guided configuration method provided in the DD or DTM
should be used after the device has been commissioned.
Note
For DeltaV users, final AI block configuration and AI block configuration changes should only be
made using the DeltaV Explorer.
1.To use guided setup:
Note
Guided setup will automatically go through each step in the proper order.
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a.Navigate to Configure, then Guided Setup.
b. Select “AI Block Unit Setup”.
Note
For convenience, AI Block 1 is pre-linked to the transmitter primary variable and should be used
for this purpose. AI Block 2 is pre-linked to the transmitter sensor temperature. The control host,
and some asset management hosts can reconfigure the factory assigned links and assign the
primary variable and sensor temperature to other AI blocks.
Channel 1 is the primary variable.
Channel 2 is the sensor temperature.
Note
Step 3 through Step 6 are all performed in a single step by step method under guided setup, or
on a single screen using manual setup.
Note
If the L_TYPE selected in Step 2 is “Direct”, Step 3, Step 4 and Step 5 are not needed. If the
L_TYPE selected is “Indirect”, Step 5 is not needed. If guided setup is used any unneeded steps
will automatically be skipped.
2. To select the Signal Conditioning “L_TYPE” from the drop down menu:
a.Select L_TYPE: “Direct” for pressure measurements using the device default units.
b. Select L_TYPE: “Indirect” for other pressure or level units.
c.Select L_TYPE: “Indirect Square Root” for flow units.
28
3. To set “XD_SCALE” to the 0% and 100% scale points (the transmitter range):
a.Select the XD_SCALE_UNITS from the drop down menu.
b. Enter the XD_SCALE 0% point. This may be elevated or suppressed for level
applications.
c.Enter the XD_SCALE 100% point. This may be elevated or suppressed for level
applications.
d. If L_TYPE is “Direct”, the AI Block may be placed in AUTO mode to return the device to
service. Guided Setup does this automatically.
Configuration
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4. If L_TYPE is “Indirect” or “Indirect Square Root”, set “OUT_SCALE” to change engineering
5. If L_TYPE is “Indirect Square Root”, a “LOW FLOW CUTOFF” function is available.
6. Change damping.
Section 2: Configure
October 2014
units.
a.Select the OUT_SCALE UNITS from the drop down menu.
b. Set the OUT_SCALE low value. This may be elevated or suppressed for level
applications.
c.Set the OUT_SCALE high value. This may be elevated or suppressed for level
applications.
d. If L_TYPE is “Indirect”, the AI Block may be placed in AUTO mode to return the device to
service. Guided Setup does this automatically.
a.Enable LOW FLOW CUTOFF.
b. Set the LOW_CUT VALUE in XD_SCALE UNITS.
c.The AI Block may be placed in AUTO mode to return the device to service. Guided Setup
does this automatically.
a.To use guided setup:
Navigate to Configure, Guided Setup, and select “Change Damping”.
Note
Guided Setup will automatically go through each step in the proper order.
Enter the desired damping value in seconds. The permitted range of values is 0.4 to
60 seconds.
b. To use manual setup:
Navigate to Configure, Manual Setup, Process Variable, and select “Change
Damping”.
Enter the desired damping value in seconds. The permitted range of values is 0.4 to
60 seconds.
7. Configure optional LCD display (if installed).
a.To use guided setup:
Navigate to Configure, Guided Setup, and select “Local Display Setup”.
Note
Guided setup will automatically go through each step in the proper order.
Check the box next to each parameter to be displayed to a maximum of four
parameters. The LCD display will continuously scroll through the selected
parameters.
b. To use manual setup:
Navigate to Configure, Manual Setup, and select “Local Display Setup”.
Check each parameter to be displayed. The LCD display will continuously scroll
through the selected parameters.
Configuration
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Section 2: Configure
October 2014
8. Review transmitter configuration and place in service.
Note
If hardware or software write protection is not needed, Step 9 can be skipped.
9. Set switches and software write lock.
Note
The write lock switch can be left in the locked or unlocked position. The simulate enable/disable
switch may be in either position for normal device operation.
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a.To review the transmitter configuration navigate using the manual setup navigation
sequences for “AI Block Unit Setup”, “Change Damping”, and “Set up LCD Display”.
b. Change any values as necessary.
c.Return to the “Overview” screen.
d. If Mode is “Not in Service”, click on the “Change” button, and then click on “Return All
to Service”.
a.Check switches (see Figure 4-2).
Enable software write lock
1.Navigate from the overview screen.
a.Select “Device Information”.
b. Select the “Security and Simulation” tab.
2. Perform “Write Lock Setup” to enable Software Write Lock.
2.8Analog Input (AI) function block
2.8.1Configure the AI block
Note
Always check and reconcile function block configuration (with the exception of Resource and
Transducer blocks) after commissioning the transmitter to the control host. unction block
configuration, including AI blocks, made prior to device commissioning to the control host may
not be saved to the control host database during the commissioning process. In addition, the
control host may download configuration changes to the transmitter as part of the
commissioning process.
Note
Changes to the AI block configuration performed after the transmitter is commissioned are
typically performed using the control host configuration software. Consult your host system
documentation to see if the AI Block guided configuration method provided in the DD or DTM
should be used after the device has been commissioned.
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Configuration
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Note
For DeltaV users, final AI block configuration and AI block configuration changes should only be
made using the DeltaV Explorer.
A minimum of four parameters are required to configure the AI Block. The parameters are
described below with example configurations shown at the end of this section.
CHANNEL
Select the channel that corresponds to the desired sensor measurement. The 2051 measures
both pressure (channel 1) and sensor temperature (channel 2).
Table 2-4. I/O Channel Definitions
L_TYPE
The L_TYPE parameter defines the relationship of the sensor measurement (pressure or sensor
temperature) to the desired output of the AI Block (e.g. pressure, level, flow, etc.). The
relationship can be direct, indirect, or indirect square root.
Section 2: Configure
October 2014
Channel number Channel description
1Pressure in AI.XD_SCALE units
2Sensor temperature in AI.XD_SCALE units
Direct
Select direct when the desired output will be the same as the sensor measurement (pressure or
sensor temperature).
Indirect
Select indirect when the desired output is a calculated measurement based on the sensor
measurement (e.g. a pressure measurement is made to determine level in a tank). The
relationship between the sensor measurement and the calculated measurement will be linear.
Indirect square root
Select indirect square root when the desired output is an inferred measurement based on the
sensor measurement and the relationship between the sensor measurement and the inferred
measurement is square root (e.g. flow).
XD_SCALE and OUT_SCALE
The XD_SCALE and OUT_SCALE each include three parameters: 0%, 100%, and, engineering
units. Set these based on the L_TYPE:
L_TYPE is direct
When the desired output is the measured variable, set the XD_SCALE to the “Primary_Value_Range”. This is found in the Sensor Transducer Block. Set OUT_SCALE to match XD_SCALE.
Configuration
L_TYPE is indirect
When an inferred measurement is made based on the sensor measurement, set the XD_SCALE
to represent the operating range that the sensor will see in the process. Determine the inferred
measurement values that correspond to the XD_SCALE 0 and 100% points and set these for the
OUT_SCALE.
31
Section 2: Configure
October 2014
L_TYPE is indirect square root
When an inferred measurement is made based on the sensor measurement AND the
relationship between the inferred measurement and sensor measurement is square root, set the
XD_SCALE to represent the operating range that the sensor will see in the process. Determine
the inferred measurement values that correspond to the XD_SCALE 0 and 100% points and set
these for the OUT_SCALE.
ParametersEnter data
Channel1=Pressure, 2=Sensor Temp
L-TypeDirect, Indirect, or Square Root
XD_ScaleScale and Engineering Units
Pabartorr @ 0 °Cft H20 @ 4°Cm H20 @ 4 °C
Note
Select only the
units that are
supported by the
device.
Out_ScaleScale and Engineering Units
kPambarkg/cm
mPapsfkg/m
hPaAtmin H20 @ 4°Cmm H20 @ 4 °Cin Hg @ 0 °C
Deg Cpsiin H20 @ 60 °Fmm H20 @ 68 °Cm Hg @ 0 °C
Deg Fg/cm
2
2
2
in H20 @ 68 °Fcm H20 @ 4 °C
Reference Manual
00809-0200-4101, Rev BA
ft H20 @ 60 °Fmm Hg @ 0 °C
ft H20 @ 68 °Fcm Hg @ 0 °C
Note
When the engineering units of the XD_SCALE are selected, this causes the engineering units of
the PRIMARY_VALUE_RANGE in the Transducer Block to change to the same units. THIS IS THE
ONLY WAY TO CHANGE THE ENGINEERING UNITS IN THE SENSOR TRANSDUCER BLOCK,
PRIMARY_VALUE_RANGE parameter.
Configuration examples
Pressure transmitter
Situation #1
A pressure transmitter with a range of 0 – 100 psi.
Solution
Table 2-5 lists the appropriate configuration settings.
Table 2-5. Analog Input function block configuration for a typical pressure transmitter
Parameter Configured values
L_TYPEDirect
XD_SCALEPrimary_Value_Range
OUT_SCALEPrimary_Value_Range
Channel1 - pressure
32
Configuration
Reference Manual
16 ft
7.0 psi measured at
the transmitter
Full Tank
OUT = PV – XD_SCALE_0%* (OUT_SCALE_100% – OUT_SCALE_0%) + OUT_SCALE_0%
XD_SCALE_100% – XD_SCALE_0%
OUT = 5 psi – 0 psi * (16 ft. – 0 ft.) + 0 ft. = 11.43 ft.
7 psi – 0 psi
00809-0200-4101, Rev BA
Pressure transmitter used to measure level in an open tank
Situation #2
The level of an open tank is to be measured using a pressure tap at the bottom of the tank. The
maximum level at the tank is 16 ft. The liquid in the tank has a density that makes the maximum
level correspond to a pressure of 7.0 psi at the pressure tap (see Figure 2-16).
Figure 2-16. Situation #2 Diagram
Section 2: Configure
October 2014
Solution to Situation #2
The table below lists the appropriate configuration settings.
Analog Input function block configuration for a pressure transmitter used in level measurement
(situation #1).
Parameter Configured values
L_TYPEIndirect
XD_SCALE0 to 7 psi
OUT_SCALE0 to 16 ft
Channel1 - pressure
Output calculation for Situation #2
When the L_Type is configured as Indirect, the OUT parameter
is calculated as:
In this example, when PV is 5 psi, then the OUT parameter will be calculated as follows:
Configuration
33
Section 2: Configure
16 ft
0 ft
2.0 psi measured at
the transmitter
Empty Tank
OUT = 4 psi – 2 psi * (16 ft. – 0 ft.) + 0 ft. = 4.57 ft.
9 psi – 2 psi
October 2014
Situation #3
The transmitter in situation #3 is installed below the tank in a position where the liquid column
in the impulse line, with an empty tank, is equivalent to 2.0 psi (see Figure 2-17).
Figure 2-17. Situation #3 Diagram
Reference Manual
00809-0200-4101, Rev BA
Solution to situation #3
The table below lists the appropriate configuration settings.
Analog Input function block configuration for a pressure transmitter used in level measurement
(Situation #3).
Parameter Configured values
L_TYPEIndirect
XD_SCALE2 to 9 psi
OUT_SCALE0 to 16 ft
Channel1 - pressure
In this example, when the PV is 4 psi, OUT will be calculated as follows:
Differential pressure transmitter to measure flow
Situation #4
The liquid flow in a line is to be measured using the differential pressure across an orifice plate in
the line. Based on the orifice specification sheet, the differential pressure transmitter was
calibrated for 0 to 20 inH
The table below lists the appropriate configuration settings.
Filtering
The filtering feature changes the response time of the device to smooth variations in output
readings caused by rapid changes in input. Adjust the filter time constant (in seconds) using the
PV_FTIME parameter. Set the filter time constant to zero to disable the filter feature.
Section 2: Configure
October 2014
Parameter Configured values
L_TYPEIndirect Square Root
XD_SCALE0 to 20 in.H2O
OUT_SCALE0 to 800 gal/min.
Channel1 - pressure
Figure 2-18. Analog Input PV_FTIME filtering Diagram
Low cutoff
When the converted input value is below the limit specified by the LOW_CUT parameter, and
the Low Cutoff I/O option (IO_OPTS) is enabled (True), a value of zero is used for the converted
value (PV). This option is useful to eliminate false readings when the differential pressure
measurement is close to zero, and it may also be useful with zero-based measurement devices
such as flowmeters.
Configuration
Note
Low Cutoff is the only I/O option supported by the AI block. Set the I/O option in Manual or Out
of Service mode only.
35
Section 2: Configure
October 2014
Process alarms
Process alarms are part of the process loop control strategy. They are configured in the control
host. Process alarm configuration is not included in the configuration menu tree. See your
control host documentation for information on configuration of process alarms. Process Alarm
detection is based on the OUT value. Configure the alarm limits of the following standard
alarms:
High (HI_LIM)
High high (HI_HI_LIM)
Low (LO_LIM)
Low low (LO_LO_LIM)
In order to avoid alarm chattering when the variable is oscillating around the alarm limit, an
alarm hysteresis in percent of the PV span can be set using the ALARM_HYS parameter. The
priority of each alarm is set in the following parameters:
HI_PRI
HI_HI_PRI
LO_PRI
Reference Manual
00809-0200-4101, Rev BA
LO_LO_PRI
Alarm priority
Alarms are grouped into five levels of priority:
Priority
number
0The alarm condition is not used.
1An alarm condition with a priority of 1 is recognized by the system, but is not reported to
2An alarm condition with a priority of 2 is reported to the operator.
3-7Alarm conditions of priority 3 to 7 are advisory alarms of increasing priority.
8-15Alarm conditions of priority 8 to 15 are critical alarms of increasing priority.
Priority description
the operator.
Status options
Status Options (STATUS_OPTS) supported by the AI block are shown below:
Propagate fault forward
If the status from the sensor is Bad, Device failure or Bad, Sensor failure, propagate it to OUT
without generating an alarm. The use of these sub-status in OUT is determined by this option.
Through this option, the user may determine whether alarming (sending of an alert) will be
done by the block or propagated downstream for alarming.
36
Uncertain if limited
Set the output status of the Analog Input block to Uncertain if the measured or calculated value
is limited.
BAD if limited
Set the output status to Bad if the sensor is violating a high or low limit.
Configuration
Reference Manual
00809-0200-4101, Rev BA
Uncertain if Man mode
Set the output status of the Analog Input block to Uncertain if the actual mode of the block is
Man.
Note
The instrument must be in Out of Service mode to set the status option.
Advanced features
The AI Function Block provides added capability through the addition of the following
parameters:
ALARM_TYPE
ALARM_TYPE allows one or more of the process alarm conditions detected by the AI function
block to be used in setting its OUT_D parameter.
OUT_D
OUT_D is the discrete output of the AI function block based on the detection of process alarm
condition(s). This parameter may be linked to other function blocks that require a discrete input
based on the detected alarm condition.
Section 2: Configure
October 2014
2.9Advanced device setup
2.9.1Overall configuration
Configuration tasks will be listed in alphabetical order. Each task will start with navigation per
the menu tree navigation diagram, to an appropriate configuration starting screen. Next
individual configuration steps will be listed. In many cases the steps can be used for either
guided or manual configuration. Specific parameter names and valid input ranges are located in
Appendix “A”.
The summary of the sections are as follows:
Section 2.9.2-Damping
Section 2.9.3-Gauge scaling
Section 2.9.4-Local display (LCD display)
Section 2.9.5-Mode
Section 2.9.6-Alert configuration NE107 and PlantWeb
Section 2.9.7-Alert simulation
Section 2.9.8-Write lock
Note
Many configuration tasks can be initiated from more than one appropriate configuration
starting screen. This manual will describe configuration from one starting screen only. The
starting screen used in the manual should not be interpreted as the preferred starting screen.
Configuration
37
Section 2: Configure
October 2014
Note
Physical layout of the parameters on the screen may be different for different configuration
tools. The parameters, parameter names, and operations performed will be consistent
regardless of screen layout.
Note
Before performing any configuration or service task contact the control room and have the loop
placed in manual mode. When configuration or service tasks are complete, contact the control
room so appropriate return to automatic control can take place.
2.9.2Damping
Note
Damping, gauge scaling, calibration, and sensor trims are performed in the Sensor Transducer
Block. For block oriented user interfaces, configure Damping in the Sensor Transducer Block.
Menu Navigation: <Configure>, <Manual Setup>, <Process Variable>
Reference Manual
00809-0200-4101, Rev BA
Damping can be changed using the Overview, Configure, or Service Tools branches of the menu
tree. All perform the same function. The Configure branch is used here.
Navigate to the Process Variables screen and click on the ‘Change Damping’ button. An
automated task procedure called a ‘Method’ will guide the user through changing the damping.
Alternately an operator or configuration engineer can change the damping from the control
system Analog Input Block configuration screens. Consult your control system documentation
for more information.
Figure 2-19. Process Variables Screen
The ‘Change Damping’ button shown in Figure 2-19 above starts an automated procedure
called a Method which allows damping to be changed.
38
The sequence of steps used is:
1.The device will be placed ‘out of service’.
2. Enter the new damping value in seconds.
3. The device will be returned to ‘Auto’ mode.
Configuration
Reference Manual
00809-0200-4101, Rev BA
2.9.3Gauge scaling
Menu Navigation: <Overview>
Scale Gauges is used to change the scaling displayed on the Gauges used to view variables. From
the Overview screen, click on the ‘Scale Gauges’ button. An automated task procedure called a
‘Method’ will guide the user through scaling the Gauges.
The sequence of steps used is:
1.Enter the desired value for the lower range of the pressure gauge.
2. Enter the desired value for the upper range of the pressure gauge.
Figure 2-20. Overview Screen
Section 2: Configure
October 2014
The ‘Scale Gauges’ button shown in Figure 2-20 above starts an automated procedure called a
method which allows the user to change the scaling on the gauge.
2.9.4Local display (LCD display)
Note
Local Display setup is performed in the LCD display transducer block. For block oriented user
interfaces, perform local display configuration in the LCD display transducer block.
Menu Navigation: <Configure>, <Manual Setup>, <Display>
The Local Display can be configured using ‘Guided Setup’ or ‘Manual Setup’.
Basic display setup
Basic Display Setup provides a check - the - box way for the user to configure up to four
parameters to display on the LCD display. These parameters are displayed on a rotating basis.
Configuration
39
Section 2: Configure
October 2014
The sequence of steps used is:
1.Check the box next to each parameter the LCD display should display.
2. If ‘Scaled Output’ is selected, use the ‘Pressure Scaled Unit’ dropdown menu to select units.
Figure 2-21. Local Display Basic Configuration Screen
Reference Manual
00809-0200-4101, Rev BA
The screen shown in Figure 2-21 above allows the user to select parameters to be displayed on
the LCD display by checking the box next to each parameter. Clicking on the ‘Advanced
Configuration’ button accesses more display configuration options.
Advanced display setup
Menu Navigation: <Configure>, <Manual Setup>, <Display>, <Advanced Configuration>
Advanced Display Setup provides a fill in the blanks screen where the user can configure
parameters from any function block in the device to be displayed on the LCD display. Setup is a
two-step process. First, each of up to four parameters is defined. To define a parameter the user
selects the ‘Block Type’, ‘Parameter Index’, and ‘Units Type’ from dropdown menus. The user
can enter ‘Block Tag’, ‘Custom Tag’, and ‘Custom Units’.
Once all desired parameters have been defined, the second step is parameters are selected for
display by checking the box in the ‘Display Parameter Select’ area.
The screen shown in Figure 2-22 above provides the capability to define parameters for display
beyond those defined in ‘Basic Configuration’. Configuration fields for Parameters 2, 3, and 4
are provided but not shown in the image.
Note
The LCD display can be configured to display a mix of basic and advanced parameters.
Configuration
Reference Manual
00809-0200-4101, Rev BA
2.9.5Mode
Note
Each block has modes. For block oriented user interfaces modes must be managed individually
in each block.
Menu Navigation: <Configure>, <Manual Setup>, <Classic View>, <Mode Summary>
F
OUNDATION fieldbus blocks have modes. Modes propagate, so if a block is in out-of-service
mode, for example, other blocks linked to it may not function as anticipated. The 2051 DD’s and
DTM’s have automated procedures that manage transducer, resource, and analog input block
modes, placing them out of service to allow configuration, then returning them to auto mode
when the configuration task is completed or canceled. If tasks are done using manual
procedures, the user is responsible for managing modes.
The ‘Mode Summary’ function displays the active mode for all resource and transducer blocks,
and allows the user to change modes of those blocks individually, or collectively. This is most
frequently used to ‘Return All to Service’. Analog input modes are managed from the analog
input block configuration screens, or from the control host.
Section 2: Configure
October 2014
Figure 2-23. Mode Summary Screen
The screen shown in Figure 2-23 above shows the modes of all resource and transducer blocks,
and provides a mechanism to individually or collectively take blocks out of service and return
them to automatic mode.
Configuration
41
Section 2: Configure
October 2014
2.9.6Alert configuration NE107 and PlantWeb
The objective of alerts is to inform users of conditions of interest, and guide the user to effective
corrective actions. The Rosemount 2051 Revision 2 Pressure Transmitter with F
fieldbus communications provides alerts in both NE107 format and PlantWeb Alerts format. The
detailed diagnostics performed and the consolidated status which is annunciated are the same
for both NE107 and PlantWeb Alerts.
Note
Alerts are located in the Resource block. For block oriented user interfaces, configure NE107 and
PlantWeb alerts, alert suppression, and alert simulation in the Resource Block.
Menu Navigation: <Configure>, <Alert Setup>, <Device Alerts OR Process Alerts OR Diagnostic
Alerts OR PlantWeb Alerts>
Note
Device Alerts, Process Alerts, and Diagnostic Alerts are configured the same way. One example
will be shown.
Reference Manual
00809-0200-4101, Rev BA
OUNDATION
Note
Device Alerts Suppression, Process Alerts Suppression, and Diagnostic Alerts Suppression are
configured the same way. One example will be shown.
NE107 Alerts category configuration
NE107 alerts are divided into Device Alerts, Process Alerts, or Diagnostics Alerts. Each alert type
has a dedicated configuration screen, and a dedicated Suppress Alerts screen. The Configure
Device Alerts Screen is used here. See “Aler ts/alarms” on pag e 20 for more information on the
conditions of each. The alerts are categorized as Failure alerts, Out of Specification alerts,
Maintenance - Required alerts, and Function Check alerts. Each category contains the same list
of Device Alerts and check boxes. Alerts are assigned to a category by checking the check box
next to the alert. This activates the alert in that category. Alerts can be assigned to more than a
single category by checking the same alert check box in multiple categories. This is not
recommended as alarms can proliferate increasing the complexity of alarm management and
delaying corrective action. Use of the factory default alert categories is recommended.
Figure 2-24. Configure Device Alerts Screen
42
Configuration
Reference Manual
00809-0200-4101, Rev BA
The screen shown in Figure 2-24 above is where the alerts are assigned by checking the box next
to the desired alert in the desired category.
Alerts suppression
Menu Navigation: <Configure>, <Alert Setup>, <Device Alerts OR Process Alerts OR Diagnostic
Alerts>
Once alerts have been configured they can be suppressed. To suppress alerts click on the
‘Suppressed Device Alerts’ button on the configuration screen. Alerts can be suppressed by
checking the check box next to the alert. This suppresses the alert in that category. Alerts can be
suppressed by category if the alert is configured to multiple categories. This allows alerts to be
selectively suppressed. To stop suppressing an alert, click on the checked box suppressing the
alert.
The screen shown in Figure 2-25 above is where alerts are suppressed by checking the box next
to the alert to be suppressed.
PlantWeb alerts configuration
PlantWeb alerts are automatically configured during the NE 107 alert configuration process.
There is not a separate process for configuration of PlantWeb alerts.
PlantWeb alerts suppression
Menu Navigation: <Configure>, <Alert Setup>, <PlantWeb Alerts>
There are two methods to suppress PlantWeb Alerts. The first is to assign an alert category,
Failed, Maintenance, or Advisory, a priority of 0 or 1. This will suppress all alerts in that category.
The second is to suppress individual alerts using NE 107 Alert suppression.
43
Section 2: Configure
October 2014
Figure 2-26. PlantWeb Alerts Suppression Screen
The screen shown in Figure 2-26 above allows categories of alerts or individual alerts to be
suppressed.
2.9.7Alert simulation
Reference Manual
00809-0200-4101, Rev BA
Alert Simulation provides the capability to simulate configured NE107 or PlantWeb alerts.
NE107 Alerts and PlantWeb Alerts show the same consolidated status derived from the same
diagnostics so the single Alert Simulation is used for both. Alert Simulation is typically used for
training or to verify alert configuration.
Menu Navigation: <Service Tools>, <Simulate>
To enable alert simulation click the ‘Enable/Disable Alerts Simulation’ button. When simulate is
active it will display on the screen. Once Alerts Simulation is active individual alerts can be
simulated by checking the check box next to the desired alert condition. The device status
indication located on the upper right corner of the screen will change to show the device status
associated with the simulated alert. The simulated status will be displayed everywhere device
status is displayed. Alert Simulation is Enabled and Disabled using an automated procedure
called a ‘Method’.
The screen shown in Figure 2-27 above enables/disables overall alert simulation capability and
allows individual alerts to be selected for simulation.
Configuration
Reference Manual
00809-0200-4101, Rev BA
The sequence of steps to Enable Alert Simulation is:
1.A screen displays stating ‘Alert Simulation is disabled.’
2. The screen presents the question ‘Do you want to enable alerts simulation? Below this
sentence are two radio buttons labeled ‘Yes’ and ‘No’. Select the Yes radio button.
The sequence of steps to Disable Alert Simulation is:
1.A screen is displayed stating ‘Alert Simulation is enabled.’
2. The screen presents the question ‘Do you want to disable alerts simulation? Below this
sentence are two radio buttons labeled ‘Yes’ and ‘No’. Select the Yes radio button.
2.9.8Write lock
Note
Write lock functions are performed in the Resource Block. For block oriented user interfaces,
perform write lock management in the Resource Block.
Section 2: Configure
October 2014
Menu Navigation: <Overview>, <Device Information>, <Security and Simulation>
An automated task procedure called a “Method” will guide the user through Write Lock setup.
Write lock permits users to configure, enable, and disable the various write lock options. Write
lock can be implemented as a hardware lock or a software lock. If it is implemented as a
hardware lock the position of the hardware lock switch on the 2051 electronics board will
determine if device writes are permitted. Hardware write lock is typically used to prevent writes
from a remote location. Software write lock is used to prevent local or remote writes unless the
write lock is disabled.
When the write lock procedure is initiated, it first informs the user if write lock is currently
enabled, and if it is configured as hardware or software write lock.
If Hardware write lock is enabled the physical switch on the electronics board must be set in the
unlocked position to enable changes, including changes to write lock, to be permitted.
If software write lock is enabled follow the on-screen instructions to enable changes.
The selection of the hardware or software write lock is done by clicking on the radio button next
to the desired option.
Configuration
45
Section 2: Configure
October 2014
Figure 2-28. Security and Simulation Display Screen
The screen shown in Figure 2-28 above allows users to see if the device has simulation active, to
see if any form of write lock is active, and to configure hardware and software write lock.
The information in this section covers installation considerations for the Rosemount 2051 with
F
OUNDATION
shipped with every transmitter to describe recommended pipe-fitting and wiring procedures
for initial installation. Dimensional drawings for each 2051 variation and mounting
configuration are included on “Dimensional drawings” on page 138.
™
fieldbus protocols. A Quick Start Guide (document number 00825-0200-4101) is
October 2014
Note
For transmitter disassembly and reassembly refer to “Disassembly procedures” on page 86, and
“Reassembly procedures” on page 88.
3.2Safety 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.
47Hardware Installation
Section 3: Hardware Installation
October 2014
3.2.1Warnings
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
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.
Reference Manual
00809-0200-4101, Rev BA
®
communicator in an explosive atmosphere, ensure the
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 193 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.
3.3Considerations
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.
48
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, see document number 00816-0100-3045 on
www.emersonprocess.com/rosemount.
Hardware Installation
Reference Manual
00809-0200-4101, Rev BA
3.4Mechanical 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 3-8 on page 56, keeping drain/vent
connections on the bottom for gas service and on the top for liquid service.
3.5Environmental 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: Specifications and 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.
Section 3: Hardware Installation
October 2014
3.6Tagging
3.6.1Commissioning tag
The 2051 has been supplied with a removable commissioning tag that contains both the Device
ID (the unique code that identifies a particular device in the absence of a device tag) and a space
to record the device tag (PD_TAG) (the operational identification for the device as defined by
the Piping and Instrumentation Diagram [P&ID]).
When commissioning more than one device on a fieldbus segment, it can be difficult to identify
which device is at a particular location. The removable tag, provided with the transmitter, can
aid in this process by linking the Device ID to its physical location. The installer should note the
physical location of the transmitter on both the upper and lower location of the commissioning
tag. The bottom portion should be torn off for each device on the segment and used for
commissioning the segment in the control system.
Figure 3-1. Commissioning Tag
Commissioning Tag
DEVICE ID:
0011512051010001440-12169809172
DEVICE REVISION: 1.1
PHYSICAL DEVICE TAG
DEVICE ID:
0011512051010001440-12169 809172
Device Barcode
DEVICE REVISION: 1.1
S / N :
PHYSICAL DEVICE TAG
A
Commissioning Tag
DEVICE ID:
001151AC00010001440-12169809172
DEVICE REVISION: 2.1
PHYSICAL DEVICE TAG
DEVICE ID:
001151AC00010001440-12169809172
Device Barcode
DEVICE REVISION: 2.1
S / N :
PHYSICAL DEVICE TAG
A. Device revision
Hardware Installation
49
Section 3: Hardware Installation
October 2014
3.6.2Transmitter tag
If permanent tag is ordered:
Transmitter is tagged in accordance with customer requirements
Tag is permanently attached to the transmitter
Software (PD_TAG)
If permanent tag is ordered, the PD Tag contains the permanent tag information up to
32 characters.
If permanent tag is NOT ordered, the PD Tag contains the transmitter serial number.
3.7Installation procedures
3.7.1Mount the transmitter
Process flange orientation
Reference Manual
00809-0200-4101, Rev BA
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 accessibility for a testing or calibration input.
Note
Most transmitters are calibrated in the horizontal position. Mounting the transmitter in any
other position will shift the zero point to the equivalent amount of liquid head pressure caused
by the varied mounting position. To reset zero point, refer to “Trim the pressure signal” on
page 80.
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.
Cover installation
Always ensure a proper seal by installing the electronics housing covers so that metal contacts
metal. Use Rosemount O-rings.
50
Mounting brackets
Rosemount 2051 Transmitters may be panel-mounted or pipe-mounted through an optional
mounting bracket. Refer to Ta bl e 3 - 1 for the complete offering and see Figure 3-2 through
Figure 3-5 on pages 51 and 52 for dimensions and mounting configurations.
Hardware Installation
Reference Manual
5
/163 11/2 Bolts
for Panel Mounting
(Not Supplied)
3
/8–16 × 11/4 Bolts
for Mounting
to Transmitter
2.8 (71)
3.4 (85)
00809-0200-4101, Rev BA
Section 3: Hardware Installation
Table 3-1. Mounting Brackets
2051 brackets
Process connectionsMountingMaterials
Flat
Option
code
B4XXN/AXXXN/AXN/AX
B1N/AN/AXXN/AN/AXN/AXN/A
B2N/AN/AXN/AXN/AXN/AXN/A
B3N/AN/AXN/AN/AXXN/AXN/A
B7N/AN/AXXN/AN/AXN/AN/AX
B8N/AN/AXN/AXN/AXN/AN/AX
B9N/AN/AXN/AN/AXXN/AN/AX
BAN/AN/AXXN/AN/AN/AXN/AX
BCN/AN/AXN/AN/AXN/AXN/AX
CoplanarIn-lineTra di tio na l
Pipe
mount
Panel
mount
panel
mount
CS
bracket
SST
bracket
CS
bolts
October 2014
SST
bolts
Figure 3-2. Mounting Bracket Option Code B4
Hardware Installation
51
Section 3: Hardware Installation
4.09 (104)
3.75 (95)
1.63 (41)
2.73 (69)
4.97 (126)
2.81
(71)
1.63 (41)
4.09 (104)
4.5 (114)
1.405
(35,7)
Mounting holes
0.375 diameter
(10)
3.75 (95)
2.81
(71)
1.40
(36)
1.405
(35,7)
2.125 (54)
2.81 (71)
8.00 (203)
Dimensions are in inches (millimeters).
1.625 (41)
October 2014
Figure 3-3. Mounting Bracket Option Codes B1, B7, and BA
Figure 3-4. Panel Mounting Bracket Option Codes B2 and B8
Reference Manual
00809-0200-4101, Rev BA
Figure 3-5. Flat Mounting Bracket Option Codes B3 and BC
52
Hardware Installation
Reference Manual
Carbon Steel (CS) Head Markings
Stainless Steel (SST) Head Markings
* The last digit in the F593_ head marking may
be any letter between A and M.
F593
B7M
B8M
316
00809-0200-4101, Rev BA
Section 3: Hardware Installation
October 2014
Flange bolts
The 2051 is shipped with a coplanar flange installed with four 1.75-in. (44 mm) flange bolts. See
Figure 3-6 on page 54 and Figure 3-7 on page 54. Stainless steel bolts are coated with a
lubricant to ease installation. Carbon steel bolts do not require lubrication. No additional
lubricant should be applied when installing either type of bolt. Bolts are identified by their head
markings:
Bolt installation
Only use bolts supplied with the 2051 or provided by Emerson Process Management as spare
parts. When installing the transmitter to one of the optional mounting brackets, torque the
bolts to 125 in-lb. (0,9 N-m). Use the following bolt installation procedure:
1.Finger-tighten the bolts.
2.Torque the bolts to the initial torque value using a crossing pattern.
3.Torque the bolts to the final torque value using the same crossing pattern.
Torque values for the flange and manifold adapter bolts are as follows:
Table 3-2. Bolt Installation Torque Values
Bolt materialInitial torque valueFinal torque value
Figure 3-6. Traditional Flange Bolt Configurations
Reference Manual
00809-0200-4101, Rev BA
A. Drain/vent
B. Plug
Dimensions are in inches (millimeters).
Figure 3-7. Mounting Bolts and Bolt Configurations for Coplanar Flange
Dimensions are in inches (millimeters).
Flange Bolts1.75 (44)
Flange/Adapter Bolts2.88 (73)
Manifold/Flange Bolts2.25 (57)
Note: Rosemount 2051T transmitters are direct mount and do not require bolts for process connection.
DescriptionSize in inches (mm)
54
Hardware Installation
Reference Manual
00809-0200-4101, Rev BA
3.7.2Impulse piping
The piping between the process and the transmitter must accurately transfer the pressure to
obtain accurate measurements. There are six possible sources of impulse piping error: pressure
transfer, leaks, friction loss (particularly if purging is used), trapped gas in a liquid line, liquid in a
gas line, and density variations between the legs.
The best location for the transmitter in relation to the process pipe is dependent on the process.
Use the following guidelines to determine transmitter location and placement of impulse
piping:
Keep impulse piping as short as possible.
For liquid service, slope the impulse piping at least 1 in./foot (8 cm/m) upward from the
transmitter toward the process connection.
For gas service, slope the impulse piping at least 1 in./foot (8 cm/m) downward from
the transmitter toward the process connection.
Avoid high points in liquid lines and low points in gas lines.
Make sure both impulse legs are the same temperature.
Section 3: Hardware Installation
October 2014
Use impulse piping large enough to avoid friction effects and blockage.
Vent all gas from liquid piping legs.
When using a sealing fluid, fill both piping legs to the same level.
When purging, make the purge connection close to the process taps and purge
through equal lengths of the same size pipe. Avoid purging through the transmitter.
Keep corrosive or hot (above 250 °F [121 °C]) process material out of direct contact
with the sensor module and flanges.
Prevent sediment deposits in the impulse piping.
Maintain equal leg of head pressure on both legs of the impulse piping.
Avoid conditions that might allow process fluid to freeze within the process flange.
Mounting requirements
Impulse piping configurations depend on specific measurement conditions. Refer to Figure 3-8
for examples of the following mounting configurations:
Liquid flow measurement
Place taps to the side of the line to prevent sediment deposits on the process isolators.
Mount the transmitter beside or below the taps so gases vent into the process line.
Mount drain/vent valve upward to allow gases to vent.
Gas flow measurement
Place taps in the top or side of the line.
Mount the transmitter beside or above the taps so to drain liquid into the process line.
Hardware Installation
55
Section 3: Hardware Installation
LIQUID SERVICE
GAS SERVICE
F
l
o
w
F
l
o
w
STEAM SERVICE
F
l
o
w
October 2014
Steam flow measurement
Place taps to the side of the line.
Mount the transmitter below the taps to ensure that impulse piping will remain filled
with condensate.
In steam service above 250 °F (121 °C), fill impulse lines with water to prevent steam
from contacting the transmitter directly and to ensure accurate measurement start-up.
Note
For steam or other elevated temperature services, it is important that temperatures at the
process connection do not exceed the transmitter’s process temperature limits. See
“Temperature limits” on page 131 for details.
Figure 3-8. Installation Examples
Reference Manual
00809-0200-4101, Rev BA
3.7.3Process connections
Coplanar or traditional process connection
Install and tighten all four flange bolts before applying pressure, or process leakage will result.
When properly installed, the flange bolts will protrude through the top of the sensor module
housing. Do not attempt to loosen or remove the flange bolts while the transmitter is in service.
Flange adapters
Rosemount 2051DP and GP process connections on the transmitter flanges are 1/4–18 NPT.
Flange adapters are available with standard
allow users to disconnect from the process by removing the flange adapter bolts. Use
plant-approved lubricant or sealant when making the process connections. Refer to “Mount the
56
transmitter” on page 50 for the distance between pressure connections. This distance may be
varied ±
To install adapters to a coplanar flange, perform the following procedure:
1.Remove the flange bolts.
2.Leaving the flange in place, move the adapters into position with the O-ring installed.
1
/8 in. (3.2 mm) by rotating one or both of the flange adapters.
1
/2–14 NPT Class 2 connections. The flange adapters
Hardware Installation
Reference Manual
A
A
B
B
C
C
D
D
ROSEMOUNT 1151
ROSEMOUNT 3051S/3051/2051/3001/3095/2024
00809-0200-4101, Rev BA
Section 3: Hardware Installation
October 2014
3.Clamp the adapters and the coplanar flange to the transmitter sensor module using the
larger of the bolts supplied.
4.Tighten the bolts. Refer to “Flange bolts” on page 53 for torque specifications.
Whenever you remove flanges or adapters, visually inspect the PTFE O-rings. Replace with
O-ring designed for Rosemount transmitter if there are any signs of damage, such as nicks or
cuts. Undamaged O-rings may be reused. If you replace the O-rings, retorque the flange bolts
after installation to compensate for cold flow. Refer to the process sensor body reassembly
procedure in Section 6: Troubleshooting.
O-rings
The two styles of Rosemount flange adapters (Rosemount 1151 and Rosemount
3051/2051/2024/3095) each require a unique O-ring (see Figure 3-9). Use only the O-ring
designed for the corresponding flange adapter.
Figure 3-9. O-rings
Failure to install proper flange adapter O-rings may cause process leaks, which can result in
death or serious injury. The two flange adapters are distinguished by unique O-ring
grooves. Only use the O-ring that is designed for its specific flange adapter, as shown below.
A. Flange Adapter
B. O-ring
C. PTFE Based
D. Elastomer
When compressed, PTFE O-rings tend to “cold flow,” which aids in their sealing capabilities.
Note
PTFE O-rings should be replaced if the flange adapter is removed.
Hardware Installation
57
Section 3: Hardware Installation
A
B
A
October 2014
Inline process connection
Do not apply torque directly to the sensor module. Rotation between the sensor module
and the process connection can damage the electronics. To avoid damage, apply torque
only to the hex-shaped process connection.
A. Sensor module
B. Process connection
3.7.4Housing rotation
Reference Manual
00809-0200-4101, Rev BA
To improve field access to wiring or to better view the optional LCD display:
Figure 3-10. Housing Rotation
A. Housing Rotation Set Screw (5/64-inch)
1.Loosen the housing rotation set screw using a 5/64 -in. hex wrench.
2.Rotate the housing clockwise to the desired location.
3.If the desired location cannot be achieved due to thread limit, rotate the housing
counterclockwise to the desired location (up to 360° from thread limit).
4.Re-tighten the housing rotation set screw to no more than 7 in-lbs when desired
location is reached.
3.8Hazardous 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” on page 200 for information
on these approvals.
58
Hardware Installation
Reference Manual
2051C AND 305 INTEGRAL
COPLANAR
2051C AND 305
INTEGRAL TRADITIONAL
2051T AND 306
IN-LINE
2051C AND 304
CONVENTIONAL
00809-0200-4101, Rev BA
Section 3: Hardware Installation
3.9Rosemount 305, 306, and 304 Manifolds
The 305 Integral Manifold is available in two designs: Traditional and Coplanar. The traditional
305 Integral Manifold can be mounted to most primary elements with mounting adapters in the
market today. The 306 Integral Manifold is used with the 2051T In-Line Transmitters to provide
block-and-bleed valve capabilities of up to 10000 psi (690 bar).
Figure 3-11. Manifolds
October 2014
Hardware Installation
59
Section 3: Hardware Installation
October 2014
Reference Manual
00809-0200-4101, Rev BA
3.9.1Rosemount 305 Integral Manifold installation procedure
To install a 305 Integral Manifold to a 2051 Transmitter:
1.Inspect the PTFE sensor module O-rings. Undamaged O-rings may be reused. If the
O-rings are damaged (if they have nicks or cuts, for example), replace with O-rings
designed for Rosemount transmitter.
Important
If replacing the O-rings, take care not to scratch or deface the O-ring grooves or the surface of
the isolating diaphragm while you remove the damaged O-rings.
2.Install the Integral Manifold on the sensor module. Use the four 2.25-in. manifold bolts
for alignment. Finger tighten the bolts, then tighten the bolts incrementally in a cross
pattern to final torque value. See “Flange bolts” on page 53 for complete bolt
installation information and torque values. When fully tightened, the bolts should
extend through the top of the sensor module housing.
3.If the PTFE sensor module O-rings have been replaced, the flange bolts should be
re-tightened after installation to compensate for cold flow of the O-rings.
Note
Always perform a zero trim on the transmitter/manifold assembly after installation to eliminate
mounting effects.
3.9.2Rosemount 306 Integral Manifold installation procedure
The 306 Manifold is for use only with a 2051T In-Line Transmitter.
Assemble the 306 Manifold to the 2051T In-Line Transmitter with a thread sealant.
To install a 304 Conventional Manifold to a 2051 Transmitter:
1.Align the Conventional Manifold with the transmitter flange. Use the four manifold
bolts for alignment.
2.Finger tighten the bolts, then tighten the bolts incrementally in a cross pattern to final
torque value. See“Flange bolts” on page 53 for complete bolt installation information
and torque values. When fully tightened, the bolts should extend through the top of
the sensor module housing.
60
3.Leak-check assembly to maximum pressure range of transmitter.
Hardware Installation
Reference Manual
Drain/Vent
Val ve
Drain/
Vent Valve
Equalize
(closed)
Process
Isolate
(open)
Isolate
(open)
H
L
Drain/
Vent Valve
Equalize
(closed)
Process
Isolate
(closed)
Isolate
(open)
H
L
Drain/
Vent Valve
Drain/Vent
Val ve
Drain/Vent
Valv e
Equalize
(open)
Process
Isolate
(closed)
Isolate
(open)
H
L
Drain/Vent
Val ve
Drain/
Vent Valve
Equalize
(closed)
Process
Isolate
(closed)
Isolate
(open)
H
L
00809-0200-4101, Rev BA
3.9.4Integral manifold operation
Three-valve configuration shown.
In normal operation the two isolate valves
between the process and instrument ports will
be open and the equalizing valve(s) will be
closed.
To zero the 2051, close the isolate valve to the
low pressure (downstream side) of the
transmitter first.
Section 3: Hardware Installation
October 2014
Next, open the center (equalize) valve(s) to
equalize the pressure on both sides of the
transmitter.
The manifold valves are now in the proper
configuration for zeroing the transmitter. To
return the transmitter to service, close the
equalizing valve(s) first.
Hardware Installation
61
Section 3: Hardware Installation
Drain/Vent
Valv e
Drain/
Vent Valve
Equalize
(closed)
Process
Isolate
(open)
Isolate
(open)
H
L
Test (Plugged)
Tes t
(Plugged)
Equalize
(closed)
Process
Isolate
(open)
Isolate
(open)
H
L
Process
Equalize
(closed)
Drain
Vent
(closed)
Test (Plugged)
Tes t
(Plugged)
Equalize
(closed)
Process
Isolate
(closed)
Isolate
(open)
H
L
Process
Equalize
(closed)
Drain Vent
(closed)
October 2014
Next, open the isolate valve on the low pressure
side of the transmitter.
Five-valve Natural Gas configurations shown:
In normal operation, the two block valves
between the process and instrument
ports will be open, and the equalizing
valves will be closed.
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00809-0200-4101, Rev BA
62
To zero the Rosemount 2051, first close
the block valve on the low pressure
(downstream) side of the transmitter.
Note
Do not open the low side equalize valve before the high side equalize valve. Doing so will
overpressure the transmitter.
Hardware Installation
Reference Manual
Tes t (P lug ged)
Tes t
(Plugged)
Equalize
(closed)
Process
Isolate
(closed)
Isolate
(open)
H
L
Process
Equalize
(open)
Drain
Vent
(closed)
Test (Plugged)
Tes t
(Plugged)
Equalize
(open)
Process
Isolate
(closed)
Isolate
(open)
H
L
Process
Equalize
(open)
Drain
Vent
(closed)
00809-0200-4101, Rev BA
Section 3: Hardware Installation
October 2014
Open the equalize valve on the high
pressure (upstream) side of the
transmitter.
Open the equalize valve on the low
pressure (downstream) side of the
transmitter. The manifold is now in the
proper configuration for zeroing the
transmitter.
3.10Liquid level measurement
Differential pressure transmitters used for liquid level applications measure hydrostatic pressure
head. Liquid level and specific gravity of a liquid are factors in determining pressure head. This
pressure is equal to the liquid height above the tap multiplied by the specific gravity of the
liquid. Pressure head is independent of volume or vessel shape.
3.10.1Open vessels
A pressure transmitter mounted near a tank bottom measures the pressure of the liquid above.
Make a connection to the high pressure side of the transmitter, and vent the low pressure side to
the atmosphere. Pressure head equals the liquid’s specific gravity multiplied by the liquid height
above the tap.
Zero range suppression is required if the transmitter lies below the zero point of the desired level
range. Figure 3-12 shows a liquid level measurement example.
3.10.2Closed vessels
Hardware Installation
Pressure above a liquid affects the pressure measured at the bottom of a closed vessel. The
liquid specific gravity multiplied by the liquid height plus the vessel pressure equals the pressure
at the bottom of the vessel.
63
Section 3: Hardware Installation
ZERO
SUPRESSION
mA dc
20
540
900
inH2O
4
T
Y
X
Let X equal the vertical distance between the minimum and maximum measurable levels (500 in.).
Let Y equal the vertical distance between the transmitter datum line and the minimum measurable level (100 in.).
Let SG equal the specific gravity of the fluid (0.9).
Let h equal the maximum head pressure to be measured in inches of water.
Let e equal head pressure produced by Y expressed in inches of water.
Let Range equal e to e + h.
Then h=(X)(SG)
=500 x 0.9
=450 inH
2
O
e=(Y)(SG)
=100 x 0.9
=90 inH
2
O
Range =90 to 540 inH
2
O
October 2014
To measure true level, the vessel pressure must be subtracted from the vessel bottom pressure.
To do this, make a pressure tap at the top of the vessel and connect this to the low side of the
transmitter. Vessel pressure is then equally applied to both the high and low sides of the
transmitter. The resulting differential pressure is proportional to liquid height multiplied by the
liquid specific gravity.
Dry leg condition
Low-side transmitter piping will remain empty if gas above the liquid does not condense. This is
a dry leg condition. Range determination calculations are the same as those described for
bottom-mounted transmitters in open vessels, as shown in Figure 3-12.
Figure 3-12. Liquid Level Measurement Example
Reference Manual
00809-0200-4101, Rev BA
64
Hardware Installation
Reference Manual
Let X equal the vertical distance between the minimum and maximum measurable levels (500 in.).
Let Y equal the vertical distance between the transmitter datum line and the minimum measurable level (50 in.).
Let z equal the vertical distance between the top of the liquid in the wet leg and the transmitter datum line (600 in.).
Let SG
1
equal the specific gravity of the fluid (1.0).
Let SG
2
equal the specific gravity of the fluid in the wet leg (1.1).
Let h equal the maximum head pressure to be measured in inches of water.
Let e equal the head pressure produced by Y expressed in inches of water.
Let s equal head pressure produced by z expressed in inches of water.
Let Range equal e – s to h + e – s.
Then h = (X)(SG
1
)
= 500 x 1.0
= 500 in H
2
O
e= (Y)(SG
1
)
= 50 x 1.0
= 50 inH
2
O
s= (z)(SG
2
)
= 600 x 1.1
= 660 inH
2
0
Range = e – s to h + e – s.
= 50 – 660 to 500 + 50 – 660
= –610 to –110 inH
2
0
ZERO ELEVATION
LT
Y
HL
mA dc
20
0
4
-110-610
inH2O
X
Z
00809-0200-4101, Rev BA
Section 3: Hardware Installation
October 2014
Wet leg condition
Condensation of the gas above the liquid slowly causes the low side of the transmitter piping to
fill with liquid. The pipe is purposely filled with a convenient reference fluid to eliminate this
potential error. This is a wet leg condition.
The reference fluid will exert a head pressure on the low side of the transmitter. Zero elevation of
the range must then be made.
Figure 3-13. Wet Leg Example
Hardware Installation
65
Section 3: Hardware Installation
mA dc
Let X equal the vertical distance between the minimum and maximum measurable levels (100 in.).
Let SG equal the specific gravit y of the fluid (1.1).
Let h equal the maximum head pressure to be measured in inches of water.
Let Rang e equal zero to h.
Then h = (X)(SG)
= 100 x 1.1
= 110 inH
2
O
Range = 0 to 110 inH
2
O
20
inH2O
0
4
110
T
AIR
X
October 2014
Bubbler system in open vessel
A bubbler system that has a top-mounted pressure transmitter can be used in open vessels. This
system consists of an air supply, pressure regulator, constant flow meter, pressure transmitter,
and a tube that extends down into the vessel.
Bubble air through the tube at a constant flow rate. The pressure required to maintain flow
equals the liquid’s specific gravity multiplied by the vertical height of the liquid above the tube
opening. Figure 3-14 shows a bubbler liquid level measurement example.
Figure 3-14. Bubbler Liquid Level Measurement Example
The information in this section covers installation considerations for the Rosemount 2051. A
Quick Start Guide is shipped with every transmitter to describe pipe-fitting, wiring procedures
and basic configuration for initial installation.
October 2014
Note
For transmitter disassembly and reassembly refer to sections “Disassembly procedures” on
page 86, and “Reassembly procedures” on page 88.
4.2Safety 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.
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.
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 Installation
67
Section 4: Electrical Installation
October 2014
4.3LCD display
Transmitters ordered with the LCD display option (M5) are shipped with the display installed.
Installing the display on an existing 2051 Transmitter requires a small instrument screwdriver.
Carefully align the desired display connector with the electronics board connector. If
connectors don't align, the display and electronics board are not compatible.
Figure 4-1. LCD Display Assembly
Reference Manual
00809-0200-4101, Rev BA
A
B
A. LCD display
B. Cover
4.3.1Rotating LCD display
1.Secure the loop to manual control and remove power to transmitter.
2.Remove transmitter housing cover.
3.Remove screws from the LCD display and rotate to desired orientation.
a.Insert 10 pin connector into the display board for the correct orientation. Carefully
align pins for insertion into the output board.
4.Re-insert screws.
5.Reattach transmitter housing cover; it is recommended the cover be tightened until
there is no gap between the cover and housing to comply with explosion proof
requirements.
6.Re-attach power and return loop to automatic control.
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Section 4: Electrical Installation
October 2014
4.4Configuring transmitter security and simulation
There are two security methods with the Rosemount 2051 Transmitter, use of the security
switch and software configured security using (see “Enable software write lock” on page 30).
Use of the security switch is described below.
Security switch
Figure 4-2. Simulate and Security Switches
B
A
C
D
E
F
A. Simulate disabled position
B. Simulate switch
C. Simulate enabled position (default)
D. Security locked position
E. Securit y switch
F. Security unlocked position (default)
4.4.1Setting security switch
Set Simulate and Security switch configuration before installation as shown in Figure 4-2.
The simulate switch enables or disables simulated alerts and simulated AI Block status
and values. The default simulate switch position is enabled.
The Security switch allows (unlocked symbol) or prevents (locked symbol) any
configuration of the transmitter.
–Default security is off (unlocked symbol).
–The security switch can be enabled or disabled in software.
Use the following procedure to change the switch configuration:
1.If the transmitter is installed, secure the loop, and remove power.
2.Remove the housing cover opposite the field terminal side. Do not remove the
instrument cover in explosive atmospheres when the circuit is live.
3.Slide the security and simulate switches into the preferred position.
4.Reattach transmitter housing cover; it is recommended the cover be tightened until
Electrical Installation
there is no gap between the cover and housing to comply with explosion proof
requirements.
69
Section 4: Electrical Installation
October 2014
4.4.2Setting simulate switch
The SIMULATE switch is located on the electronics. It is used in conjunction with the transmitter
simulate software to simulate process variables and/or alerts and alarms. To simulate variables
and/or alerts and alarms, the SIMULATE switch must be moved to the ENABLE position and the
software enabled through the host. To disable simulation, the switch must be in the DISABLE
position or the software simulate parameter must be disabled through the host.
4.5Electrical considerations
Note
Make sure all electrical installation is in accordance with national and local code requirements.
Do not run signal wiring in conduit or open trays with power wiring or near heavy electrical
equipment.
Reference Manual
00809-0200-4101, Rev BA
4.5.1Conduit installation
If all connections are not sealed, excess moisture accumulation can damage the
transmitter. Make sure to mount the transmitter with the electrical housing positioned
downward for drainage. To avoid moisture accumulation in the housing, install wiring with
a drip loop, and ensure the bottom of the drip loop is mounted lower than the conduit
connections of the transmitter housing.
Recommended conduit connections are shown in Figure 4-3.
Figure 4-3. Conduit Installation Diagrams
A
B
A. Possible conduit line positions
B. Sealing compound
B
A
INCORRECT
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DP
A
B
C
F
D
E
00809-0200-4101, Rev BA
4.5.2Power supply for FOUNDATION fieldbus
Power supply
The transmitter requires between 9 and 32 V dc (9 and 30 V dc for intrinsic safety, and 9 and
17.5 V dc for FISCO intrinsic safety) to operate and provide complete functionality.
Power conditioner
A fieldbus segment requires a power conditioner to isolate the power supply, filter, and
decouple the segment from other segments attached to the same power supply.
4.6Wiring
4.6.1Transmitter wiring
Section 4: Electrical Installation
October 2014
Wiring and power supply requirements can be dependent upon the approval certification. As
with all F
OUNDATION
™
fieldbus requirements, a conditioned power supply and terminating
resistors are required for proper operation. The standard 2051 Pressure Transmitter terminal
block is shown in Figure 4-5. The terminals are not polarity sensitive. The transmitter requires
9-32 Vdc to operate. Type A F
OUNDATION fieldbus wiring 18 awg twisted shielded pair is
recommended. Do not exceed 5000 ft (1500 m) total segment length.
Note
Avoid running instrument cable next to power cables in cable trays or near heavy electrical
equipment.
It is important that the instrument cable shield be:
- trimmed close and insulated from touching the transmitter housing
- continuously connected throughout the segment
- connected to a good earth ground at the power supply end
Figure 4-4. Wiring Terminals
A. Minimize distance
Electrical Installation
B. Trim shield and insulate
C. Protective Grounding Terminal (do not ground cable shield at the transmitter)
D. Insulate Shield
E. Minimize distance
F. Connect Shield Back to the Power Supply Ground
71
Section 4: Electrical Installation
October 2014
Perform the following procedure to make wiring connections:
1.Remove the housing cover on terminal compartment side. Do not remove the cover in
explosive atmospheres when the circuit is live. Signal wiring supplies all power to the
transmitter.
2.Plug and seal unused conduit connection on the transmitter housing to avoid moisture
accumulation in the terminal side.
4.6.2Grounding the transmitter
Signal cable shield grounding
Signal cable shield grounding is summarized in Figure 4-4 on page 71. The signal cable shield
and unused shield drain wire must be trimmed and insulated, ensuring that the signal cable
shield and drain wire do not come in contact with the transmitter case. See “Transmitter case
grounding” on page 73 for instructions on grounding the transmitter case. Follow the steps
below to correctly ground the signal cable shield.
Do not run signal wiring in conduit or open trays with power wiring, or near heavy electrical
equipment. Grounding terminations are provided on the outside of the electronics housing and
inside the terminal compartment. These grounds are used when transient protect terminal
blocks are installed or to fulfill local regulations.
Reference Manual
00809-0200-4101, Rev BA
1.Remove the field terminals housing cover.
2.Connect the wiring pair and ground as indicated in “Wiring” on page 71.
a.Trim the cable shield as short as practical and insulate from touching the transmitter
housing.
Note
Do NOT ground the cable shield at the transmitter; if the cable shield touches the transmitter
housing, it can create ground loops and interfere with communications.
b. Continuously connect the cable shields to the power supply ground.
c.Connect the cable shields for the entire segment to a single good earth ground at the
power supply.
Note
Improper grounding is the most frequent cause of poor segment communications.
3.Replace the housing cover. It is recommended that the cover be tightened until there is
no gap between the cover and the housing.
4.Plug and seal unused conduit connections.
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Transmitter case grounding
Always ground the transmitter case in accordance with national and local electrical codes. The
most effective transmitter case grounding method is a direct connection to earth ground with
minimal impedance. Methods for grounding the transmitter case include:
Internal ground connection: The internal ground connection screw is inside the FIELD
External ground connection: The external ground connection is located on the exterior
Figure 4-5. Internal Ground Connection
Section 4: Electrical Installation
October 2014
TERMINALS side of the electronics housing. This screw is identified by a ground symbol
(). The ground connection screw is standard on all Rosemount 2051 Transmitters.
Refer to Figure 4-5 on page 73.
of the transmitter housing. Refer to Figure 4-6 on page 73. This connection is only
available with option V5 and T1.
A
A. Internal ground location
Figure 4-6. External Ground Connection (Option V5 or T1)
A
A. External ground location
Note
Grounding the transmitter case via threaded conduit connection may not provide sufficient
ground continuity.
Electrical Installation
73
Section 4: Electrical Installation
A
B
October 2014
Transient protection terminal block grounding
The transmitter can withstand electrical transients of the energy level usually encountered in
static discharges or induced switching transients. However, high-energy transients, such as
those induced in wiring from nearby lightning strikes, can damage the transmitter.
The transient protection terminal block can be ordered as an installed option (Option Code T1)
or as a spare part to retrofit existing 2051 Transmitters in the field. See “Spare parts” on
page 193 for part numbers. The lightning bolt symbol shown in Figure 4-7 on page 74 identifies
the transient protection terminal block.
Figure 4-7. Transient Protection Terminal Block
Reference Manual
00809-0200-4101, Rev BA
A. External ground connection location
B. Lightning bolt location
Note
The transient protection terminal block does not provide transient protection unless the
transmitter case is properly grounded. Use the guidelines to ground the transmitter case. Refer
to Figure 4-7.
Absolute pressure transmitters (2051CA and 2051TA) are calibrated at the factory.
Trimming adjusts the position of the factory characterization curve. It is possible to
degrade performance of the transmitter if any trim is done improperly or with inaccurate
equipment.
This section contains information on operation and maintenance procedures.
Field Communicator and AMS
functions.
®
Device Manager instructions are given to perform configuration
5.1.1Methods and manual operation
Each FOUNDATION™ fieldbus host or configuration tool has different ways of displaying and
performing operations. Some hosts will use Device Descriptions (DD) and DD Methods to
complete device configuration and will display data consistently across platforms. The DD can
be found on F
configuration tool support these features.
For DeltaV
will describe how to use methods in a general fashion.
OUNDATION’s website at www.fieldbus.org. There is no requirement that a host or
™
users, the DD can be found at www.easydeltav.com. The information in this section
5.2Safety 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.
Operation and Maintenance
75
Section 5: Operation and Maintenance
October 2014
5.2.1Warnings
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 Field 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.
Reference Manual
00809-0200-4101, Rev BA
Performing a 'Restart with defaults' will set all function block information in the device to
factory defaults. This includes the clearing of all function block links and schedule, as well as
defaulting all Resource and Transducer Block user data (LCD display Transducer Block
parameter configuration, etc.).
5.3Calibration overview
The Rosemount 2051 Pressure Transmitter is an accurate instrument that is fully calibrated
in the factory. Field calibration is provided to the user to meet plant requirements or
industry standards.
Sensor calibration allows the user to adjust the pressure (digital value) reported by the
transmitter to be equal to a pressure standard. The sensor calibration can adjust the pressure
offset to correct for mounting conditions or line pressure effects. This correction is
recommended. The calibration of the pressure range (pressure span or gain correction) is not
recommended for new instruments.
Calibrate the sensor
Sensor Trim ( "Perform a calibration or sensor trim" on page 81)
76
Zero Trim ( "Perform a calibration or sensor trim" on page 81)
Operation and Maintenance
Reference Manual
ReferenceAccuracy
2
TemperatureEffect
2
StaticPressureEffect
2
++
0.025 URL
Span
-------------------------------------- - 0.125+
% per 50 °F 0.167% of span=
0.1% reading per 1000 psi (69 bar) 0.05% of span at maximum span=
00809-0200-4101, Rev BA
Section 5: Operation and Maintenance
5.3.1Determining necessary sensor trims
Bench calibration is not recommended for new instruments. It is possible to degrade the
performance of the transmitter if a trim is done improperly or with inaccurate equipment. The
transmitter can be set back to factory settings using the Recall Factory Trim command shown in
Figure 5-3 on page 83.
For transmitters that are field installed, the manifolds discussed in "Rosemount 305, 306, and
304 Manifolds" on page 51 allow the differential transmitter to be zeroed using the zero trim
function. Both 3-valve and 5-valve manifolds are discussed. This field calibration will eliminate
any pressure offsets caused by mounting effects (head effect of the oil fill) and static pressure
effects of the process.
Determine the necessary trims with the following steps.
1.Apply pressure.
2.Check the pressure, if the pressure does not match the applied pressure, perform a
sensor trim. See "Perform a calibration or sensor trim" on page 81.
5.3.2Determining calibration frequency
Calibration frequency can vary greatly depending on the application, performance
requirements, and process conditions. Use the following procedure to determine calibration
frequency that meets the needs of your application.
October 2014
1.Determine the performance required for your application.
2.Determine the operating conditions.
3.Calculate the Total Probable Error (TPE).
4.Calculate the stability per month.
5.Calculate the calibration frequency.
Sample calculation for Rosemount 2051
Step 1: Determine the performance required for your application.
Required Performance:0.30% of span
Step 2: Determine the operating conditions.
Transmitter: Rosemount 2051CD, Range 2 [URL=250 inH
Calibrated Span:150 inH2O (374 mbar)
Ambient Temperature
Change:
Line Pressure:500 psig (34,5 bar)
± 50 °F (28 °C)
Step 3: Calculate total probable error (TPE).
TPE == 0.189% of span
Where:
Reference Accuracy =± 0.065% of span
Ambient Temperature Effect =
Span Static Pressure Effect
(1)
=
O(623 mbar)]
2
(1) Zero static pressure effect removed by zero trimming at line pressure.
Operation and Maintenance
77
Section 5: Operation and Maintenance
Stability
0.100 URL
Span
-------------------------------------- -
% of span for 2 years 0.0069% of URL for 1 month==
Sample calculation for Rosemount 2051C with P8 option
(0.05% accuracy & 5-year stability)
Step 1: Determine the performance required for your application.
Required Performance:0.30% of span
Step 2: Determine the operating conditions.
Reference Manual
00809-0200-4101, Rev BA
Transmitter: 2051CD, Range 2 [URL=250 inH
O(623 mbar)]
2
Calibrated Span:150 inH2O (374 mbar)
Ambient
± 50 °F (28 °C)
Tem pera ture Change:
Line Pressure:500 psig (34,5 bar)
Step 3: Calculate total probable error (TPE).
TPE == 0.117% of span
Where:
Reference Accuracy =± 0.05% of span
Ambient Temperature Effect =
(1)
Span Static Pressure Effect
(1) Zero static pressure effect removed by zero trimming at line pressure.
=
Step 4: Calculate the stability per month.
Step 5: Calculate calibration frequency.
5.3.3Compensating for span line pressure effects
78
(range 4 and range 5)
Rosemount 2051 Range 4 and 5 Pressure Transmitters require a special calibration procedure
when used in differential pressure applications. The purpose of this procedure is to optimize
transmitter performance by reducing the effect of static line pressure in these applications. The
Operation and Maintenance
Reference Manual
00809-0200-4101, Rev BA
Rosemount 2051 Differential Pressure Transmitters (ranges 1 through 3) do not require this
procedure because optimization occurs at the sensor.
The systematic span shift caused by the application of static line pressure is -0.95% of reading
per 1000psi (69 bar) for Range 4 transmitters, and -1% of reading per 1000psi (69 bar) for Range
5 transmitters. Using the following procedure, the span effect can be corrected to ±0.2% of
reading per 1000 psi (69 bar) for line pressures from 0 to 3626 psi (0 to 250 bar).
Use the following example to compute correct input values.
Example
A range 4 differential pressure transmitter (Rosemount 2051CD4...) will be used in an
application with a static line pressure of 1200 psi (83 bar). To correct for systematic error caused
by high static line pressure, first use the following formulas to determine the corrected values
for the high trim value.
High trim value
HT = (URV - (S/100 x P/1000 x LRV))
Section 5: Operation and Maintenance
October 2014
Where:HT =Corrected High Trim Value
URV =Upper Range Value
S =Span shift per specification (as a percent of reading)
P =Static Line Pressure in psi
In this example:
URV =1500 inH
S =-0.95%
P =1200 psi
LT = 1500 - (-0.95%/100 x 1200 psi/1000 psi x 1500 inH
LT =1517.1 inH20
O (3.74 bar)
2
O)
2
Complete the Upper Sensor Trim procedure as described in "Perform a calibration or sensor
trim" on page 81. In the example above, at step 4, apply the nominal pressure value of 1500
inH
0. However, enter the calculated correct upper Sensor Trim value of 1517.1 inH20 with a
2
Field Communicator.
Note
The Range Values for the 4 and 20 mA points should be at the nominal URV and LRV. In the
example above, the values are 1500 inH
0 and 500 inH20 respectively. Confirm the values on
2
the HOME screen of the Field Communicator. Modify, if needed, by following the steps in
"Rerange the transmitter" on page 15.
Operation and Maintenance
79
Section 5: Operation and Maintenance
B
A
A
B
October 2014
5.4Trim the pressure signal
5.4.1Sensor trim overview
A Sensor Trim corrects the pressure offset and pressure range to match a pressure standard. The
upper Sensor Trim corrects the pressure range and the lower Sensor Trim (Zero Trim) corrects
the pressure offset. An accurate pressure standard is required for full calibration. A zero trim can
be performed if the process is vented, or the high and low side pressure are equal (for
differential pressure transmitters).
Zero trim is a single-point offset adjustment. It is useful for compensating for mounting position
effects and is most effective when performed with the transmitter installed in its final mounting
position. Since this correction maintains the slope of the characterization curve, it should not be
used in place of a Sensor Trim over the full sensor range.
When performing a zero trim, ensure that the equalizing valve is open and all wet legs are filled
to the correct levels. Line pressure should be applied to the transmitter during a zero trim to
eliminate line pressure errors. Refer to "Integral manifold operation" on page 61.
Note
F
OUNDATION fieldbus has no analog signal that needs ranging. Therefore, ranging a new device
prior to installation is usually not necessary or recommended.
Reference Manual
00809-0200-4101, Rev BA
Note
Do not perform a zero trim on Rosemount 2051T Absolute Pressure Transmitters. Zero trim is
zero based, and absolute pressure transmitters reference absolute zero. To correct mounting
position effects on a 2051T Absolute Pressure Transmitter, perform a low trim within the Sensor
Trim function. The low trim function provides an offset correction similar to the zero trim
function, but it does not require zero-based input.
Upper and lower sensor trim is a two-point sensor calibration where two end-point pressures are
applied, all output is linearized between them, and requires an accurate pressure source. Always
adjust the low trim value first to establish the correct offset. Adjustment of the high trim value
provides a slope correction to the characterization curve based on the low trim value. The trim
values help optimize performance over a specific measurement range.
Figure 5-1. Sensor Trim Example
80
A. Before Trim
B. After Trim
Operation and Maintenance
Reference Manual
00809-0200-4101, Rev BA
Section 5: Operation and Maintenance
5.4.2Perform a calibration or sensor trim
When performing a Sensor Trim, if both upper and lower trims are to be performed, the lower
trim must be done prior to the upper trim.
Note
Use a pressure input source that is at least four times more accurate than the transmitter, and
allow the input pressure to stabilize for 60 seconds before entering any values.
Performing a sensor trim
Note
Calibration and sensor trims are performed in the sensor transducer block. For block oriented
user interfaces, perform calibrations and trims in the sensor transducer block.
Menu Navigation: <Overview>, <Calibration>, <Sensor Trim>
All sensor trims, and restoring factory calibration can be performed using the Overview and
Service Tools branches of the menu tree. In addition, calibrations and trims can be documented
with the information stored to an asset management system.
October 2014
Navigate to the Sensor Trim screen and click on the button for the type of trim desired. An
automated procedure called a ‘Method’ will guide the user through the desired trim procedure.
The automated procedure for upper and lower sensor trims includes steps for documenting
pressure, units, date, and name of person performing the trim and physical location where the
trim was performed. This information can be entered or edited for full calibrations in “Last
Calibration Points”, and “Calibration Details”.
Note
Generally only a zero trim should be performed. For high static pressure applications, a lower
and upper trim can be performed.
Note
Refer to Section 5: Calibration overview through Section 5: Sensor trim overview for information
on the various types of trims. Refer to "Rosemount 305, 306, and 304 Manifolds" on page 59 for
manifold operation instructions to properly drain/vent valves.
Note
If both an upper and lower sensor trim are needed, perform the lower trim first.
Operation and Maintenance
81
Section 5: Operation and Maintenance
October 2014
Figure 5-2. Sensor Trim Screen
Reference Manual
00809-0200-4101, Rev BA
The “Sensor Trim” “Upper, Lower, Zero, and Restore” buttons start automated procedures
called Methods which guide the user through the sequence of steps needed to perform the
desired trim. “Upper and lower” trims require a pressure source. In addition, for “Upper, lower,
and zero” trims the user will need to place manifold valves in the proper position to perform the
trim, and return the manifold valves to the proper positions for normal operation. “Restore
Factory Calibration” doesn’t require a pressure source or manipulation of manifold valves.
To calibrate the sensor using the Sensor Trim function, perform the following procedure:
1.Select Lower Sensor Trim.
Note
Select pressure points so that lower and upper values are equal to or outside the expected
process operation range.
5.5Status
Along with the measured or calculated PV value, every FOUNDATION fieldbus block passes an
additional parameter called STATUS. The PV and STATUS are passed from the Transducer Block
to the Analog Input Block. The STATUS can be one of the following: GOOD, BAD, or UNCERTAIN.
When there are no problems detected by the self-diagnostics of the block, the STATUS will be
GOOD. If a problem occurs with the hardware in the device, or, the quality of the process
variable is compromised for some reason, the STATUS will become either BAD or UNCERTAIN
depending upon the nature of the problem. It is important that the Control Strategy that makes
use of the Analog Input Block is configured to monitor the STATUS and take action where
appropriate when the STATUS is no longer GOOD.
82
Operation and Maintenance
Reference Manual
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5.6Master reset method
5.6.1Resource block
Menu Navigation: <Service Tools>, <Maintenance>, <Reset / Restore>
Note: Master Reset (sometimes called restart) is performed in the resource block. For block
oriented user interfaces, perform the reset in the resource block.
There are two master reset options. One restarts the transmitter processor but doesn't change
device configuration. The second is a restart with factory defaults. It returns all device and
function block parameters to the factory defaults. An automated procedure called a “Method”
will guide the user through both reset options.
Figure 5-3. Master Reset Button
Section 5: Operation and Maintenance
October 2014
The “Master Reset” button starts the method that initiates the reset and verifies the reset is
complete. Note that during the reset communication between the device and the host will be
lost. There may be some delay before the device is recognized again by the host.
Set the RESTART to one of the options below:
Run - Default State
Resource - Not Used
Defaults - Sets all device parameters to FOUNDATION fieldbus default values
Processor - Does a software reset of the CPU
Operation and Maintenance
83
Section 5: Operation and Maintenance
October 2014
5.7Simulation
Simulate replaces the channel value coming from the Sensor Transducer Block. For testing
purposes, it is possible to manually drive the output of the Analog Input Block to a desired value.
There are two ways to do this.
5.7.1Manual mode
To change only the OUT_VALUE and not the OUT_STATUS of the AI Block, place the TARGET
MODE of the block to MANUAL. Then, change the OUT_VALUE to the desired value.
5.7.2Simulate
1.If the SIMULATE switch is in the OFF position, move it to the ON position.
2.To change both the OUT_VALUE and OUT_STATUS of the AI Block, set the TARGET
MODE to AUTO.
3.Set SIMULATE_ENABLE_DISABLE to ‘Active’.
Reference Manual
00809-0200-4101, Rev BA
4.Enter the desired SIMULATE_VALUE to change the OUT_VALUE and
SIMULATE_STATUS_QUALITY to change the OUT_STATUS.
5.Set SIMULATE_ENABLE_DISABLE to 'Inactive' to return the AI block to normal operation.
This section provides summarized troubleshooting suggestions for the most common
operating problems. This section contains Rosemount 2051 fieldbus troubleshooting
information only. Disassembly and reassembly procedures can be found in the “Disassembly
procedures” on page 86 and “Reassembly procedures” on page 88.
Section 6: Troubleshooting
October 2014
Follow the procedures described here to verify transmitter hardware and process connections
are in good working order. Always deal with the most likely checkpoints first.
Table 6-3 on page 93 provides summarized maintenance and troubleshooting suggestions for
the most common operating problems.
If you suspect malfunction despite the absence of any diagnostic messages on the Field
Communicator display, consider using “Troubleshooting guides” on page 91 to identify any
potential problem.
6.2Safety 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.
Tro u bl esh o oti ng
85
Section 6: Troubleshooting
October 2014
6.2.1Warnings
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 field 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.
Reference Manual
00809-0200-4101, Rev BA
Static electricity can damage sensitive components.
Observe safe handling precautions for static-sensitive components.
6.3Disassembly procedures
Do not remove the instrument cover in explosive atmospheres when the circuit is live.
6.3.1Removing from service
Follow these steps:
1.Follow all plant safety rules and procedures.
2.Power down device.
3.Isolate and vent the process from the transmitter before removing the transmitter from
service.
4.Remove all electrical leads and disconnect conduit.
5.Remove the transmitter from the process connection.
a.The Rosemount 2051C Transmitter is attached to the process connection by four bolts
and two cap screws. Remove the bolts and screws and separate the transmitter from
the process connection. Leave the process connection in place and ready for
re-installation. Reference Figure 3-7 on page 54 for coplanar flange.
86
Tro u bl esh o oti ng
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See “Safety messages” on page 85 for complete warning.
00809-0200-4101, Rev BA
b. The Rosemount 2051T Transmitter is attached to the process by a single hex nut
process connection. Loosen the hex nut to separate the transmitter from the process.
Do not wrench on neck of transmitter. See warning in
6.Do not scratch, puncture, or depress the isolating diaphragms.
7.Clean isolating diaphragms with a soft rag and a mild cleaning solution, and rinse with
clear water.
8.For the 2051C, whenever you remove the process flange or flange adapters, visually
inspect the PTFE O-rings. Replace the O-rings if they show any signs of damage, such as
nicks or cuts. Undamaged O-rings may be reused.
6.3.2Removing terminal block
Electrical connections are located on the terminal block in the compartment labeled “FIELD
TERMINALS.”
1.Remove the housing cover from the field terminal side.
Section 6: Troubleshooting
October 2014
“Housing rotation” on page 58.
2.Loosen the two small screws located on the assembly in the 9 o’clock and 5 o’clock
positions relative to the top of the transmitter.
3.Pull the entire terminal block out to remove it.
6.3.3Removing electronics board
The transmitter electronics board is located in the compartment opposite the terminal side. To
remove the electronics board see Figure 4-1 on page 68 and perform following procedure:
1.Remove the housing cover opposite the field terminal side.
2.If you are disassembling a transmitter with a LCD display, loosen the two captive screws
that are visible (See Figure 4.3LCD Display for screw locations). on the front of the
meter display. The two screws anchor the LCD display to the electronics board and the
electronics board to the housing.
Note
The electronics board is electrostatically sensitive; observe handling precautions for
static-sensitive components
3.Using the two captive screws, slowly pull the electronics board out of the housing. The
sensor module ribbon cable holds the electronics board to the housing. Disengage the
ribbon cable by pushing the connector release.
Note
If an LCD display is installed, use caution as there is an electronic pin connector that interfaces
between the LCD display and electronics board.
Tro u bl esh o oti ng
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Section 6: Troubleshooting
See “Safety messages” on page 85 for complete warning.
October 2014
Reference Manual
00809-0200-4101, Rev BA
6.3.4Removing sensor module from the electronics housing
1.Remove the electronics board. Refer to “Removing electronics board” on page 87.
Important
To prevent damage to the sensor module ribbon cable, disconnect it from the electronics board
before you remove the sensor module from the electrical housing.
2.Carefully tuck the cable connector completely inside of the internal black cap.
Note
Do not remove the housing until after you tuck the cable connector completely inside of the
internal black cap. The black cap protects the ribbon cable from damage that can occur when
you rotate the housing.
5
3.Using a
4.Unscrew the module from the housing, making sure the black cap on the sensor
module and sensor cable do not catch on the housing.
/64-inch hex wrench, loosen the housing rotation set screw one full turn.
6.4Reassembly procedures
1.Inspect all cover and housing (non-process wetted) O-rings and replace if necessary.
Lightly grease with silicone lubricant to ensure a good seal.
2.Carefully tuck the cable connector completely inside the internal black cap. To do so,
turn the black cap and cable counterclockwise one rotation to tighten the cable.
3.Lower the electronics housing onto the module. Guide the internal black cap and cable
on the sensor module through the housing and into the external black cap.
4.Turn the module clockwise into the housing.
Important
Make sure the sensor ribbon cable and internal black cap remain completely free of the housing
as you rotate it. Damage can occur to the cable if the internal black cap and ribbon cable
become hung up and rotate with the housing.
5.Thread the housing completely onto the sensor module. The housing must be no more
than one full turn from flush with the sensor module to comply with explosion proof
requirements.
6.Tighten the housing rotation set screw to no more than 7 in-lbs when desired location is
reached.
88
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6.4.1Attaching electronics board
1.Remove the cable connector from its position inside of the internal black cap and attach
it to the electronics board.
2.Using the two captive screws as handles, insert the electronics board into the housing.
Make sure the power posts from the electronics housing properly engage the
receptacles on the electronics board. Do not force. The electronics board should slide
gently on the connections.
3.Tighten the captive mounting screws.
4.Replace the housing cover. It is recommended the cover be tightened until there is no
gap between the cover and the housing.
6.4.2Installing terminal block
1.Gently slide the terminal block into place, making sure the two power posts from the
electronics housing properly engage the receptacles on the terminal block.
Section 6: Troubleshooting
October 2014
2.Tighten the captive screws.
3.Replace the electronics housing cover. The transmitter covers must be fully engaged to
meet Explosion-Proof requirements.
6.4.3Reassembling the 2051C process flange
1.Inspect the sensor module PTFE O-rings. Undamaged O-rings may be reused. Replace
O-rings that show any signs of damage, such as nicks, cuts, or general wear.
Note
If you are replacing the O-rings, be careful not to scratch the O-ring grooves or the surface of the
isolating diaphragm when removing the damaged O-rings.
2.Install the process connection. Possible options include:
a.Coplanar
– Hold the process flange in place by installing the two alignment screws to finger
– Install the four 1.75-in. flange bolts by finger tightening them to the flange.
b. Coplanar Process Flange with Flange Adapters:
– Hold the process flange in place by installing the two alignment screws to finger
– Hold the flange adapters and adapter O-rings in place while installing (in the desired
c.Manifold:
– Contact the manifold manufacturer for the appropriate bolts and procedures.
™
Process Flange:
tightness (screws are not pressure retaining). Do not over-tighten as this will affect
module-to-flange alignment.
tightness (screws are not pressure retaining). Do not over-tighten as this will affect
module-to-flange alignment.
of the four possible process connection spacing configurations) using four 2.88-inch
bolts to mount securely to the coplanar flange. For gage pressure configurations, use
two 2.88-inch bolts and two 1.75-inch bolts
Tro u bl esh o oti ng
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Section 6: Troubleshooting
October 2014
3.Tighten the bolts to the initial torque value using a crossed pattern. See Table 6-1 on
4.Using same cross pattern, tighten bolts to final torque values seen in Table 6-1 on page
Table 6-1. Bolt Installation Torque Values
Bolt materialInitial torque valueFinal torque value
If you replaced the PTFE sensor module O-rings, re-torque the flange bolts after installation to
compensate for cold flow of the O-ring material.
Reference Manual
00809-0200-4101, Rev BA
page 90 for appropriate torque values.
90.
Note
For Range 1 transmitters: after replacing O-rings and re-installing the process flange, expose the
transmitter to a temperature of 185 °F (85 °C) for two hours. Then re-tighten the flange bolts in
a cross pattern, and again expose the transmitter to a temperature of 185 °F (85 °C) for two
hours before calibration.
See “Safety messages” on page 85 for complete warning.
6.4.4Installing drain/vent valve
1.Apply sealing tape to the threads on the seat. Starting at the base of the valve with the
threaded end pointing toward the installer, apply five clockwise turns of sealing tape.
2.Tighten the drain/vent valve to 250 in-lb. (28.25 N-m).
3.Take care to place the opening on the valve so that process fluid will drain toward the
ground and away from human contact when the valve is opened.
90
Tro u bl esh o oti ng
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