Pressure, Level, and Flow Solutions with WirelessHART™
Protocol
Reference Manual
00809-0100-4102, Rev AA
Rosemount 2051 Wireless Pressure, Flow,
and Level Solutions
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 Emerson Process Management nuclear-qualified products, contact your
local Rosemount Sales Representative.
i
Reference Manual
00809-0100-4102, Rev AA
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-based communicator in an explosive atmosphere, make
sure the instruments in the loop are installed in accordance with intrinsically safe or
non-incendive field wiring practices.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
conditions.
This device may not cause harmful interference. This device must accept any interference
received, including interference that may cause undesired operation.
This device must be installed to ensure a minimum antenna separation distance of 8 in.
(20cm) from all persons.
Process leaks may cause harm or result in death.
To avoid process leaks, only use the o-ring designed to seal with the corresponding
flange adapter.
Electrical shock can result in death or serious injury.
Avoid contact with the leads and the terminals. High voltage that may be present on
leads can cause electrical shock.
The Rosemount 2051 and all other wireless devices should be installed only after the Smart
Wireless Gateway has been installed and is functioning properly. Wireless devices should
also be powered up in order of proximity from the Smart Wireless Gateway, beginning with
the closest. This will result in a simpler and faster network installation.
ii
Reference Manual
00809-0100-4102, Rev AA
Shipping considerations for wireless products (Lithium Batteries: Green Power Module,
model number 701PGNKF):
The unit was shipped to you without the Power Module installed. Please remove the
Power Module from the unit prior to shipping.
Each power module contains one “D” size primary lithium-thionyl chloride battery.
Primary lithium batteries are regulated in transportation by the U.S. Department of
Transportation, and are also covered by IATA (International Air Transport Association),
ICAO (International Civil Aviation Organization), and ARD (European Ground
Transportation of Dangerous Goods). It is the responsibility of the shipper to ensure
compliance with these or any other local requirements. Please consult current
regulations and requirements before shipping.
The power module with the wireless unit contains one “D” size primary lithium-thionyl
chloride battery (Green Power Module, model number 701PGNKF). Each battery contains
approximately 5.0 grams of lithium. Under normal conditions, the battery materials are
self-contained and are not reactive as long as the battery and the pack integrity are
maintained. Care should be taken to prevent thermal, electrical or mechanical damage.
Contacts should be protected to prevent premature discharge.
Battery hazards remain when cells are discharged.
Power modules should be stored in a clean and dry area. For maximum battery life, storage
temperature should not exceed 30 °C (86 °F).
The Power Module may be replaced in a hazardous area. The Power Module has surface
resistivity greater than one gigaohm and must be properly installed in the wireless device
enclosure. Care must be taken during transportation to and from the point of installation to
prevent electrostatic charge build-up.
Using the Rosemount 2051 Wireless Pressure Transmitter in a manner other than what is
specified by the manufacturer may impair the protection provided by the equipment.
The sections in this manual provide information on installing, operating, and maintaining the
Rosemount 2051 Wireless pressure transmitter with WirelessHART
organized as follows:
Section 2: Configuration provides instruction on commissioning and operating 2051
Wireless transmitters. Information on software functions, configuration parameters,
and online variables is also included.
Section 3: Installation contains mechanical and electrical installation instructions.
Section 4: Commissioning contains techniques for properly commissioning the device.
Section 1: Introduction
May 2013
™
protocol. The sections are
Section 5: Operation and maintenance contains operation and maintenance
techniques.
Section 6: Troubleshooting provides troubleshooting techniques for the most common
operating problems.
Appendix A: Specifications and Reference Data supplies reference and specification
Measures differential and gage pressure up to 2000 psi (137,9 bar).
Measures absolute pressure up to 4000 psi (275,8 bar)
1.2.2Rosemount 2051T in-line Pressure Transmitter
Measures gage/absolute pressure up to 10000 psi (689,5 bar).
Introduction
1
Section 1: Introduction
May 2013
1.2.3Rosemount 2051L Level Transmitter
Measures level and specific gravity up to 300 psi (20,7 bar)
1.2.4Rosemount 2051CF Flowmeters
Measures flow in line sizes from
1
/2 in. (15 mm) to 96 in. (2400 mm)
Reference Manual
00809-0100-4102, Rev AA
2
Introduction
Reference Manual
Yes
START HERE
Bench
Configuration
and Calibration
Field Install
No
Set Pressure to
PV
(
page 13)
Set Range
Points
(page 14)
Select Transfer
Function for
Percent of Range
(
page 15)
Ver ify
Apply Pressure
Yes
Within
Specifications?
No
Refer to
Section 5:
Operation and
maintenance
Mount
Tra ns mit te r
(
page 36)
Install Power
Module
(
page 13)
Trim th e
Tra ns mit te r
(page 67)
Done
Review
Tra ns mi tt er
Configuration
(
page 20)
Confirm
Tra ns mit te r
Configuration
(
page 20)
Configure for
Pressure
Configure
Scaled Variable
(
page 16)
Set Scaled
Variab le to PV
(page 13)
Configure for
Level
Configure for
Flow
Configure
Scaled Variable
(
page 16)
Set Scaled
Variab le to PV
(page 13)
Check Process
Connection
(
page 43)
Join Device to
Network by
Setting Network
ID and Join Key
(
page 12)
Configure
Update Rate
(page 12)
Set Device Tag
(
page 11)
Set Process
Variable Units
(page 13)
Set Range Points
(page 14)
Set Range Points
(page 14)
00809-0100-4102, Rev AA
1.3WirelessHART installation flowchart
Figure 1-1. WirelessHART installation flowchart
Section 1: Introduction
May 2013
Introduction
3
Section 1: Introduction
May 2013
1.4Transmitter 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
piezo-resistive sensor technology for AP and GP measurements.
The major components of the Rosemount 2051 Wireless transmitter 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, a memory module, and
the analog to digital signal converter (A/D converter). The electrical signals from the sensor
module are transmitted to the output electronics in the electronics housing. The electronics
housing contains the output electronics board, the antenna, and the battery. The basic block
diagram of the Rosemount 2051CD Wireless device is illustrated in Figure 1-3 on page 5.
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 Module. The microprocessor then takes the signals from
the Signal Processing Module and calculates the correct output of the transmitter. This signal is
then sent via wireless communication to the Gateway.
Reference Manual
00809-0100-4102, Rev AA
An optional LCD can be ordered that connects directly to the output electronics board which
maintains direct access to the signal terminals. The display indicates output and abbreviated
diagnostic messages. A clear display cover is provided. For WirelessHART output, the LCD
Display features a three-line display. The first line describes the process variable measured, the
second line displays the measured value, and the third line displays engineering units. The LCD
can also display diagnostics messages.
Note
LCD Display utilizes a 3-line, 7-digit character display and can display output and diagnostic
messages. See Figure 1-2.
Figure 1-2. LCD Display
LCD Display
4
Introduction
Reference Manual
ABC
D
Signal Processing
Tem p.
Sensor
Sensor Module
Memory
Microprocessor
Sensor linearization
Rerange
Diagnostics
Engineering units
Communication
Memory
Configuration
Local HART
Handheld
Communicator
WirelessHART
Communication
00809-0100-4102, Rev AA
Figure 1-3. Block diagram of operation
Section 1: Introduction
May 2013
A. Sensor Module
B. Electronics Board
C. WirelessHART Signal to Control System
D. Field Communicator
1.5Considerations before transmitter installation
1.5.1Wireless considerations
Power up sequence
The Power Module should not be installed on any wireless device until the Smart Wireless
Gateway is installed and functioning properly. This transmitter uses the Green Power Module
(order model number 701PGNKF). Wireless devices should also be powered up in order of
proximity from the Smart Wireless Gateway, beginning with the closest. This will result in a
simpler and faster network installation. Enable Active Advertising on the Gateway to ensure that
new devices join the network faster. For more information, see the Smart Wireless Gateway
Manual (Doc. No. 00809-0200-4420).
Antenna position
The internal antenna is designed for multiple mounting orientations. The transmitter should be
mounted according to best practices for your pressure measurement application.
Introduction
5
Section 1: Introduction
May 2013
Network design best practices
When mounting the device, recommended practices should be considered to achieve the best
wireless performance. See Appendix D: Network design best practices for more information on
recommended practices.
Field communicator connections
The Power Module needs to be installed in the device for the Field Communicator to interface
with the Rosemount 2051. The Field Communicator connections are located on the Power
Module. To communicate to the transmitter, connect the Field Communicator to the COMM
port connections on the Power Module. This transmitter uses the Green Power Module; please
order model number 701PGNKF. Field communication with this device requires a HART-based
Field Communicator using the correct Rosemount 2051 Wireless DD. The Power Module is
keyed and can only be inserted in one orientation. Refer to Figure 1-4 for instructions on
connecting the Field Communicator to the 2051.
Figure 1-4. Field Communicator Connections
Reference Manual
00809-0100-4102, Rev AA
1.5.2Mechanical
Location
When choosing an installation location and position, take into account access to the power
module compartment for easy power module replacement.
Electronics cover
The electronics cover is tightened so that polymer contacts polymer. When removing the
electronics cover, ensure that there is no damage done to the o-ring. If damaged replace before
reattaching cover, ensuring polymer contacts polymer (i.e. no o-ring visible).
1.5.3Electrical
Power module
The Rosemount 2051 Wireless Pressure Transmitter is self-powered. The Power Module
contains a primary lithium-thionyl chloride battery (Green Power Module, model number
6
Introduction
Reference Manual
00809-0100-4102, Rev AA
701PGNKF). Each battery contains approximately 5 grams of lithium. Under normal conditions,
the battery materials are self-contained and are not reactive as long as the battery and the
Power Module are maintained. Care should be taken to prevent thermal, electrical, or
mechanical damage. Contacts should be protected to prevent premature discharge.
Use caution when handling the Power Module, it may be damaged if dropped from heights in
excess of 6.10 m (20 ft).
1.5.4Environmental
Verify that the operating atmosphere of the transmitter is consistent with the appropriate
hazardous locations certifications.
Temperature effects
The transmitter will operate within specifications for ambient temperatures between -40 and 85
°C (-40 and 185 °F).
Heat from the process is transferred to the transmitter housing. If the process temperature is
high, the ambient temperature will need to be lower to account for heat transferred to the
transmitter housing. See “Process Temperature Limits” on page 96 for process temperature
derating.
Section 1: Introduction
May 2013
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.
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.
Introduction
7
Section 1: Introduction
May 2013
Shipping considerations for wireless products (Lithium Batteries: Green Power Module,
model number 701PGNKF):
The unit was shipped to you without the Power Module installed. Please remove the Power
Module from the unit prior to shipping.
Each power module contains a primary lithium-thionyl chloride battery. Primary lithium
batteries are regulated in transportation by the U.S. Department of Transportation, and are
also covered by IATA (International Air Transport Association), ICAO (International Civil
Aviation Organization), and ARD (European Ground Transportation of Dangerous Goods). It
is the responsibility of the shipper to ensure compliance with these or any other local
requirements. Please consult current regulations and requirements before shipping.
The Power Module contains a primary lithium-thionyl chloride battery (Green Power Module,
model number 701PGNKF). Each Power Module contains approximately 5 grams of lithium.
Under normal conditions, the Power Module materials are self-contained and are not reactive as
long as the batteries and the module integrity are maintained. Care should be taken to prevent
thermal, electrical or mechanical damage. Contacts should be protected to prevent premature
discharge. Power Module hazards remain when cells are discharged.
Reference Manual
00809-0100-4102, Rev AA
Power Module should be stored in a clean and dry area. For maximum battery life, storage
temperature should not exceed 86 °F (30 °C).
Emerson Process Management Instrument and Valve Response Center representatives will
explain the additional information and procedures necessary to return goods exposed to
hazardous substances.
1.7Product 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.
Field Communicator and AMS Device Manager instructions are given to perform configuration
functions. For convenience, Field Communicator fast key sequences are labeled “Fast Keys” for
each software function below the appropriate headings.
Full Field Communicator menu trees and fast key sequences are available in Appendix C: Field
Communicator Menu Trees and Fast Keys.
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.
9Configuration
Section 2: Configuration
May 2013
Warnings ()
Failure to follow these installation guidelines could result in death or
serious injury.
Make sure only qualified personnel perform the installation.
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 Wireless reference manual for any restrictions associated
with a safe installation.
Before connecting a Field Communicator in an explosive atmosphere, make sure the
Verify that the operating atmosphere of the transmitter is consistent with the
Process leaks could result in death or serious injury.
Install and tighten process connectors before applying pressure.
Electrical shock could cause death or serious injury.
Avoid contact with the leads and terminals. High voltage that may be present on leads
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
conditions: This device may not cause harmful interference. This device must accept any
interference received, including interference that may cause undesired operation.
This device must be installed to ensure a minimum antenna separation distance of
Reference Manual
00809-0100-4102, Rev AA
instruments are installed in accordance with intrinsically safe or non-incendive field
wiring practices.
appropriate hazardous locations certifications
can cause electrical shock.
20cm (8 in.) from all persons.
2.3Required bench top configuration
Bench top configuration requires a Field Communicator, AMS, or any WirelessHART
Communicator. Connect the Field Communicator leads to the terminals labeled “COMM” on the
Power Module. See Figure 2-1 on page 11.
Bench top configuration consists of testing the transmitter and verifying transmitter
configuration data. 2051 Wireless transmitters must be configured before installation.
Configuring the transmitter on the bench before installation using a Field Communicator, AMS,
or any WirelessHART Communicator ensures that all network settings are working correctly.
When using a Field Communicator, any configuration changes made must be sent to the
transmitter by using the “Send” key (F2). AMS configuration changes are implemented when
the “Apply” button is clicked.
AMS Wireless Configurator
AMS is capable of connecting to devices either directly, using a HART modem, or wirelessly via
the Smart Wireless Gateway. When configuring the device, double click the device icon or right
click and select Configure.
10
Configuration
Reference Manual
00809-0100-4102, Rev AA
2.3.1Connection diagrams
Bench hook-up
Connect the bench equipment as shown in Figure 2-1 on page 11, and turn on the Field
Communicator by pressing the ON/OFF key or log into AMS. The Field Communicator or AMS
will search for a HART-compatible device and indicate when the connection is made. If the Field
Communicator or AMS fail to connect, it indicates that no device was found. If this occurs, refer
to Section 6: Troubleshooting.
Field hook-up
Figure 2-1 on page 11 illustrates the wiring for a field hook-up with a Field Communicator or
AMS. The Field Communicator or AMS may be connected at “COMM” on the transmitter Power
Module.
Figure 2-1. Field Communicator Connection
Section 2: Configuration
May 2013
For HART communication, a 2051 WirelessHART DD is required.
2.4Basic setup
2.4.1Set device tag
Fast Keys
The tag is used to identify the device. You can use an 8 to 32 character tag.
1.From the Home screen, select 2: Configure
2.Select 2: Manual Setup
3.Select 9: Device Information
4.Select 1: Identification
Configuration
5.Select 1: Tag
2, 2, 9, 1, 1
11
Section 2: Configuration
May 2013
2.4.2Join device to network
Reference Manual
00809-0100-4102, Rev AA
Fast Keys
In order to communicate with the Smart Wireless Gateway, and ultimately the Host System, the
transmitter must be configured to communicate over the wireless network. This step is the
wireless equivalent of connecting wires from a transmitter to the host system.
1.From the Home screen, select 2: Configure.
2.Select 1: Guided Setup.
3.Select 3: Join Device to Network.
Using a Field Communicator or AMS, enter the Network ID and Join Key so that they match the
Network ID and Join Key of the Smart Wireless Gateway and other devices in the network. If the
Network ID and Join Key are not identical to those set in the Gateway, the transmitter will not
communicate with the network. The Network ID and Join Key may be obtained from the Smart
Wireless Gateway on the Setup>Network>Settings page on the web server.
2, 1, 3
2.4.3Configure update rate
Fast Keys
The Update Rate is the frequency at which a new measurement is taken and transmitted over
the wireless network. This by default is 1 minute. This may be changed at commissioning, or at
any time via AMS Wireless Configurator. The Update Rate is user selectable from 1 second to 60
minutes.
2, 1, 4
1.From the Home screen, select 2: Configure.
2.Select 1: Guided Setup.
3.Select 4: Configure Update Rate.
12
Configuration
Reference Manual
00809-0100-4102, Rev AA
2.4.4Set process variable units
Section 2: Configuration
May 2013
Fast Keys
2, 2, 2, 3
The PV Unit command sets the process variable units to allow you to monitor your process using
the appropriate units of measure.
To select a unit of measure for the PV:
1.From the Home screen, select 2: Configure.
2.Select 2: Manual Setup.
3.Select 2: Pressure.
4.Select 3: Unit to select from the following engineering units:
inH
inH
inH
ftH
O at 4 °CmmH2O at 68 °FmmHgMpa
2
O at 60 °FcmH2O at 4 °CPsiBar
2
O at 68 °FmH2O at 4 °CAtmMbar
2
O at 4 °CinHg at 0 °CTo rrg/cm
2
ftH2O at 60 °FmmHg at 0 °CPascalskg/cm
ftH2O at 68 °FcmHg at 0 °ChectoPascalskg/m
mmH2O at 4 °CmHg at 0 °CKilopascals
2.4.5Remove Power Module
2
2
2
After the sensor and network have been configured, remove the Power Module and replace the
housing cover. The Power Module should be inserted only when the device is ready to be
commissioned.
Use caution when handling the Power Module. The Power Module may be damaged if dropped
from heights in excess of 6.10 m (20 ft).
2.5Configure for Pressure
2.5.1Re-Mapping device variables
The re-mapping function allows the transmitter primary, secondary, tertiary, and quaternary
variables (PV, SV, TV, and QV) to be configured in one of two configurations. The user may select
either the option of Classic mapping or Scaled Variable Mapping, see Tab l e 2 -1 for what is
mapped to each variable. All variables can be remapped with a Field Communicator or AMS
Device Manager.
Configuration
13
Section 2: Configuration
May 2013
Table 2-1. Variable Mapping
PVPressureScaled Variable
SVSensor TemperaturePressure
TVElectronics TemperatureSensor Temperature
QVSupply VoltageSupply Voltage
Note
The variable assigned to the primary variable drives the output. This value can be selected as
Pressure or Scaled Variable.
Re-mapping using a Field Communicator
From the HOME screen, enter the fast key sequence
Fast Keys
Reference Manual
00809-0100-4102, Rev AA
Classic MappingScaled Variable Mapping
2, 2, 6, 1
Re-mapping using AMS Device Manager
Right click on the device and select Configure.
1.Select Manual Setup and click on the HART tab.
2. Assign Primary, secondary, tertiary and quaternary variables under Variable Mapping.
3. Click Send.
4. Carefully read the warning and click Yes if it is safe to apply the changes.
2.5.2Set range points
From the HOME screen, enter the fast key sequence
Fast Keys
The Range Values command sets the lower and upper range values used for the percent of range
measurement.
Note
Transmitters are shipped from Rosemount Inc. fully calibrated per request or by the factory
default of full scale (span = upper range limit).
2, 1, 1, 5
14
1.From the Home screen, select 2: Configure
2.Select 1: Guided Setup
3.Select 1: Basic Setup
4.Select 5: Range Values
Configuration
Reference Manual
Sq. Root
Curve
Transition Point
Linear Section
Slope=1
Slope=42
Transitio n Poi nt
Sq. Root Curve
Full Scale
Flow (%)
00809-0100-4102, Rev AA
Section 2: Configuration
2.5.3Set transmitter percent of range (transfer function)
The Rosemount 2051 Wireless transmitter has two transfer functions for pressure applications:
Linear and Square Root. As shown in Figure 2-2 on page 15, activating the square root options
the transmitter analog output proportional to flow.
However, for DP Flow and DP Level applications it is recommended to use Scaled Variable. Refer
to “Diagnostics and service” on page 24 for setup instructions.
From 0 to 0.6 percent of the ranged pressure input, the slope of the curve is unity (y = x). This
allows accurate calibration near zero. Greater slopes would cause large changes in output (for
small changes at input). From 0.6 percent to 0.8 percent, curve slope equals 42 (y = 42x) to
achieve continuous transition from linear to square root at the transition point.
Setting transmitter output with a Field Communicator
From the HOME screen, enter the fast key sequence
Fast Keys
2, 2, 4, 2
May 2013
Setting transmitter output with AMS Device Manager
Right click on the device and select Configure.
1.Click Manual Setup and choose output type from Transfer Fu nc tion and click Send.
2.Carefully read the warning and click Yes if it is safe to apply the changes.
Figure 2-2. Square Root Output Transition Point
Configuration
15
Section 2: Configuration
May 2013
2.6Configure for Level and Flow
2.6.1Configuring scaled variable
The Scaled Variable configuration allows the user to create a relationship/conversion between
the pressure units and user-defined/custom units. There are two use cases for Scaled Variable.
The first use case is to allow custom units to be displayed on the transmitter's LCD Display. The
second use case is to allow custom units to drive the transmitter's PV output.
If the user desires custom units to drive the PV output, Scaled Variable must be re-mapped as
the primary variable. Refer to “Re-Mapping device variables” on page 18.
The Scaled Variable configuration defines the following items:
Scaled Variable units - Custom units to be displayed.
Scaled data options - Defines the transfer function for the application
–Linear
–Square root
Reference Manual
00809-0100-4102, Rev AA
Pressure value position 1 - Lower known value point with consideration of linear offset.
Scaled Variable value position 1 - Custom unit equivalent to the lower known value
point.
Pressure value position 2 - Upper known value point
Scaled Variable value position 2 - Custom unit equivalent to the upper known value
point
Linear offset - The value required to zero out pressures affecting the desired pressure
reading.
Low flow cutoff - Point at which output is driven to zero to prevent problems caused by
process noise. It is highly recommended to use the low flow cutoff function in order to
have a stable output and avoid problems due to process noise at a low flow or no flow
condition. A low flow cutoff value that is practical for the flow element in the
application should be entered.
Configuring Scaled Variable using a Field Communicator
From the HOME screen, enter the fast key sequence
Device Dashboard Fast Keys
1.Follow the screen prompts to configure Scaled Variable.
a.When configuring for level, select Linear under Select Scaled data options.
b.When configuring for flow, select Square Root under Select Scaled data options.
2, 1, 7
16
Configuring Scaled Variable using AMS Device Manager
Right click on the device and, select Configure.
1.Select the Scaled Variable tab and click the Scaled Variable button.
2. Follow screen prompts to configure Scaled Variable
Configuration
Reference Manual
H
L
A
B
C
D
00809-0100-4102, Rev AA
DP Level Example
Figure 2-3. Example tank
Section 2: Configuration
May 2013
a.When configuring for level applications, select Linear under Select Scaled data options.
b. When configuring for flow applications, select Square Root under Select Scaled data
options.
A. 230 in.
B. 200 in.
C. 12 in.
D. 0.94 sg
A differential transmitter is used in a level application. Once installed on an empty tank and taps
vented, the process variable reading is -209.4 inH2O. The process variable reading is the head
pressure created by fill fluid in the capillary. Based on Table 2-2 on page 2-17, the Scaled
Variable configuration would be as follows:
Table 2-2. Scaled Variable Configuration for Tank Application
Scaled Variable units:inch
Scaled data options:linear
Pressure value position 1:0 inH2O
Scaled Variable position 1:12 in.
Pressure value position 2:188 inH2O
Scaled Variable position 2:212 in.
Linear offset:-209.4 inH2O
DP Flow example
Configuration
A differential pressure transmitter is used in conjunction with an orifice plate in a flow
application where the differential pressure at full scale flow is 125 inH2O. In this particular
application, the flow rate at full scale flow is 20,000 gallons of water per hour. It is highly
17
Section 2: Configuration
May 2013
recommended to use the low flow cutoff function in order to have a stable output and avoid
problems due to process noise at a low flow or no flow condition. A low flow cutoff value that is
practical for the flow element in the application should be entered. In this particular example,
the low flow cutoff value is 1000 gallons of water per hour. Based on this information, the Scaled
Variable configuration would be as follows:
Table 2-3. Scaled Variable Configuration for Flow Application
Scaled Variable units:gal/h
Scaled data options:square root
Pressure value position 2:125 inH2O
Scaled Variable position 2:20,000 gal/h
Low Flow Cutoff:1000 gal/h
Note
Pressure value position 1 and Scaled Variable position 1 are always set to zero for a flow
application. No configuration of these values is required.
Reference Manual
00809-0100-4102, Rev AA
2.6.2Re-Mapping device variables
The re-mapping function allows the transmitter primary, secondary, tertiary, and quaternary
variables (PV, SV, TV, and QV) to be configured in one of two configurations. The user may select
either the option of Classic Mapping or Scaled Variable Mapping, see Ta bl e 2 - 4 for what is
mapped to each variable. All variables can be remapped with a Field Communicator or AMS
Device Manager.
Table 2-4. Variable Mapping
Classic MappingScaled Variable Mapping
PVPressureScaled Variable
SVSensor TemperaturePressure
TVElectronics TemperatureSensor Temperature
QVSupply VoltageSupply Voltage
Note
The variable assigned to the primary variable drives the output. This value can be selected as
Pressure or Scaled Variable.
Re-mapping using a Field Communicator
18
From the HOME screen, enter the fast key sequence
Fast Keys
Re-mapping using AMS Device Manager
Right click on the device and select Configure.
2, 2, 6, 1, 1
Configuration
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