Rosemount 3144P Temperature Transmitter Manuals & Guides

Reference Manual

00809-0100-4021, Rev JC

December 2019

Rosemount™ 3144P Temperature Transmitter

with Rosemount X-well™ Technology

NOTICE

Read this manual before working with the product. For personal and system safety, and for optimum product performance,
ensure you thoroughly understand the contents before installing, using, or maintaining this product.

Within the United States, Emerson has two toll-free assistance numbers:

Customer Central (Technical support, quoting, and order-related questions): 1-800-999-9307 (7:00 am to 7:00 pm Central Time)

North American Response Center (Equipment service needs): 1-800-654-7768 (24 hours)

International: (952)-906-8888

CAUTION

The products described in this document are NOT designed for nuclear-qualified applications.

Using non-nuclear qualified products in applications that require nuclear-qualified hardware or products may cause inaccurate
readings.

For information on Rosemount nuclear-qualified products, contact your local Emerson Sales Representative.

WARNING

Failure to follow these installation guidelines could result in death or serious injury.

Ensure only qualified personnel perform installation or service.

Electrical shock could cause death or serious injury.

Use extreme caution when making contact with the leads and terminals.

Explosions could result in death or serious injury.

Do not remove the connection head cover in explosive atmospheres when the circuit is live.

Before powering a FOUNDATION™ Fieldbus segment in an explosive atmosphere, ensure the instruments in the loop are installed in
accordance with intrinsically safe or non-incendive field wiring practices.

Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications.

All connection head covers must be fully engaged to meet explosion-proof requirements.

Process leaks could result in death or serious injury.

Do not remove the thermowell while in operation.

Install and tighten thermowells or sensors before applying pressure.

Physical access

Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end users’ equipment. This could
be intentional or unintentional and needs to be protected against.

Physical security is an important part of any security program and fundamental to protecting your system. Restrict physical access
by unauthorized personnel to protect end users’ assets. This is true for all systems used within the facility.

2

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00809-0100-4021 December 2019

Contents

Chapter 1 Introduction.................................................................................................................. 5

1.1 Using this manual.............................................................................................................................5

1.2 Rosemount 3144P revisions............................................................................................................. 6

1.3 Confirm HART revision capability....................................................................................................10

Chapter 2 Installation...................................................................................................................11

2.1 Installation considerations..............................................................................................................11

2.2 Commissioning.............................................................................................................................. 13

2.3 Mounting....................................................................................................................................... 16

2.4 Installation..................................................................................................................................... 17

2.5 Wiring............................................................................................................................................ 23

2.6 Foundation Fieldbus....................................................................................................................... 27

2.7 Power supply..................................................................................................................................28

2.8 Grounding......................................................................................................................................29

2.9 Wire and apply power.....................................................................................................................32

Chapter 3 HART Commissioning...................................................................................................33

3.1 Overview........................................................................................................................................ 33

3.2 Confirm HART revision capability....................................................................................................33

3.3 Safety messages.............................................................................................................................34

3.4 Field Communicator.......................................................................................................................34

3.5 Review configuration data..............................................................................................................44

3.6 Check output..................................................................................................................................44

3.7 Configuration................................................................................................................................. 44

3.8 Rosemount X-well Technology configuration................................................................................. 99

3.9 Device output configuration.........................................................................................................102

3.10 Device information.....................................................................................................................104

3.11 Measurement filtering................................................................................................................106

3.12 Diagnostics and service.............................................................................................................. 108

3.13 Multidrop communication..........................................................................................................109

3.14 Use with the HART Tri-Loop........................................................................................................110

3.15 Configure Thermocouple Degradation in guided setup.............................................................. 113

3.16 Configure Thermocouple Degradation in manual setup............................................................. 118

3.17 Active Thermocouple Degradation Alerts...................................................................................123

3.18 Minimum/maximum tracking diagnostic....................................................................................128

3.19 Calibration..................................................................................................................................136

3.20 Trim the transmitter...................................................................................................................137

3.21 Output trim or scaled output trim.............................................................................................. 147

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December 2019 00809-0100-4021

3.22 Troubleshooting.........................................................................................................................148

Chapter 4 FOUNDATION Fieldbus Configuration......................................................................... 157

4.1 Overview...................................................................................................................................... 157

4.2 Safety messages...........................................................................................................................157

4.3 Device description........................................................................................................................157

4.4 Node address............................................................................................................................... 158

4.5 Modes.......................................................................................................................................... 158

4.6 Link Active Scheduler (LAS)...........................................................................................................159

4.7 Capabilities...................................................................................................................................159

4.8 FOUNDATION Fieldbus function blocks............................................................................................ 160

4.9 Resource block............................................................................................................................. 162

4.10 Analog Input (AI)........................................................................................................................ 175

4.11 Operation...................................................................................................................................182

4.12 Troubleshooting guides..............................................................................................................188

Chapter 5 Operation and maintenance.......................................................................................193

5.1 Safety messages...........................................................................................................................193

5.2 Maintenance................................................................................................................................ 193

5.3 Return of materials.......................................................................................................................195

Chapter 6 Safety Instrumented Systems (SIS) requirements....................................................... 197

6.1 SIS certification.............................................................................................................................197

6.2 Safety certified identification........................................................................................................197

6.3 Installation................................................................................................................................... 197

6.4 Configuration...............................................................................................................................198

6.5 Operation and maintenance.........................................................................................................200

6.6 Specifications............................................................................................................................... 201

6.7 Spare parts................................................................................................................................... 202

Appendix A Reference data........................................................................................................... 203

A.1 Product Certifications...................................................................................................................203

A.2 Ordering Information, Specifications, and Drawings.................................................................... 203

iv Rosemount 3144P

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00809-0100-4021 December 2019

Introduction

1 Introduction

1.1 Using this manual

The sections in this manual provide information on installing, operating, and maintaining
the Rosemount™ 3144P Temperature Transmitter. The sections are organized as follows:

• Installation contains mechanical and electrical installation instructions.

• HART Commissioning contains techniques for properly commissioning the device.

• FOUNDATION Fieldbus Configuration provides instruction on commissioning and

operating the Rosemount 3144P Transmitter. This chapter also includes information
on software functions, configuration parameters, and online variables.

• Operation and maintenance contains operation and maintenance techniques.

• Safety Instrumented Systems (SIS) Requirements provides identification, installation,

configuration, operation and maintenance, and inspection information for Safety
Instrumented Systems.

1.1.1

• Reference Data supplies reference and specification data, as well as ordering

information and contains intrinsic safety approval information, European ATEX
directive information, and approval drawings.

Transmitter

Industry-leading temperature transmitter delivers unmatched field reliability and
innovative process measurement solutions:

• Rosemount X-Well™ Technology provides a Complete Point Solution™ for accurately

measuring process temperature in monitoring applications without the requirement of
a thermowell or process penetration

• Superior accuracy and stability

• Dual and single sensor capability with universal sensor inputs (RTD, T/C, mV, ohms)

• Comprehensive sensor and process diagnostics offering

• IEC 61508 safety certification

• Dual-compartment housing

• Large LCD display

• Selectable HART® Revision (5 and 7) or FOUNDATION Fieldbus protocols

Improve efficiency with Best-in-Class product specifications and capabilities:

• Reduce maintenance and improve performance with industry leading accuracy and

stability.

• Improve measurement accuracy by 75 percent with Transmitter-Sensor Matching.

• Ensure process health with system alerts and easy-to-use Device Dashboards.

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December 2019 00809-0100-4021

• Easily check device status and values on local LCD display with large percent range

graph.

• Achieve high reliability and installation ease with the industry's most rugged dual

compartment design.

Optimize measurement reliability with diagnostics designed for any protocol on any host
system.

• Thermocouple Degradation Diagnostic monitors the health of a thermocouple loop,

enabling preventative maintenance.

• Minimum and Maximum Temperature Tracking tracks and records temperature

extremes of the process sensors and the ambient environment.

• Sensor Drift Alert detects sensor drift and alerts you.

• The Hot Backup™ feature provides temperature measurement redundancy.

Refer to the following literature for a full range of compatible connection heads, sensors,
and thermowells provided by Emerson:

• Rosemount Volume 1 Temperature Sensors and Accessories Product Data Sheet

• Rosemount DIN-Style Temperature Sensors and Thermowells (Metric) Product Data

Sheet

1.2 Rosemount 3144P revisions

HART protocol

The initial release of the Rosemount 3144P HART was device revision 3. Each additional
revision contains incremental improvements. summarizes these changes.

Table 1-1: HART Revisions

Software
release date

April 2017 1.2.1 1.0.0 3 7 7

April 2012 1.1.1 N/A 2 7 6

Feb 2007 N/A N/A 1 5 4

Identify device Field device driver Review

NAMUR
software
revision

NAMUR
hardware
Revision

HART
software
revision

HART
universal

(1)

revision

5 5

5 5

(2)

)

Device
revision

(3)

(4)

(4)

(4)

instructions

Manual
document
number

00809-0100-40
21

Dec 2003 N/A N/A N/A 5 3

(1) NAMUR software revision is located in the hardware tag of the device. You can read the HART

software revision with a HART capable configuration tool.

(2) Device driver file names use device and DD devision (e.g. 10_07). HART protocol is designed to

enable legacy driver revisions to continue to communicate with new HART devices. To access this
functionality, download the new device driver. Emerson recommends downloading the new
device driver to ensure new functionality.

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(3) Rosemount X-well sensor type.
(4) HART Revision 5 and 7 selectable, Thermocouple Degradation Diagnostic, Min/Max Tracking.

FOUNDATION Fieldbus

The following table summarizes the Rosemount 3144P FOUNDATION™ Fieldbus revision
history.

Table 1-2: FOUNDATION Fieldbus Revisions

Device
revision

Rev 1 1.00.011 5 N/A N/A Initial release. Mar.

Rev 1 1.00.024 5 N/A N/A Minor product

Rev 1 1.00.024 6 N/A N/A Minor product

Rev 1 1.01.004 6 N/A N/A Software update. Oct.

Rev 1 1.01.010 7 N/A N/A Component

Rev 2 2.02.003 7 N/A N/A FF Sensor and Process

Software
revision

Hardware
revision

NAMUR
software
revision

NAMUR
hardware
revision

Description Date

2004

Sep.

maintenance, software.

maintenance,
hardware.

obsolescence hardware
change and software to
support the hardware
change.

Diagnostic Release
(D01): Thermocouple
Degradation Diagnostic
and Minimum and
Maximum Temperature
Tracking.

2004

Dec.
2004

2005

Feb.
2007

Nov.
2008

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Table 1-2: FOUNDATION Fieldbus Revisions (continued)

Device
revision

Rev 3 3.10.23 7 1.3.1 1.0.0 Device Compliance to

Software
revision

Hardware
revision

NAMUR
software
revision

NAMUR
hardware
revision

Description Date

ITK 6.0.1. Addition of
NE107 device
diagnostic information.
Ease of use
improvements
including:

• Hot Backup

functionality has
been moved to the
transducer block,
allowing easier
configuration from
the DD.

• Device is shipped

with the simulate
switch ON, allowing
device alerts
simulation without
cover removal.

• Device has unique

block names using
the last four digits
(XXXX) of the
output board serial
number, e.g.
AI_1400_XXXX

• All blocks are

instantiated before
shipping, including
model option code
dependent blocks.
The product also
has all parameters
initialized so that its
primary
measurement is
available with no
user changes
required.

• All devices ship will

AI block scheduled.

• Customer will be

able to use old DD
files when replacing
a device with a
newer rev device;
this is possible for
devices with device

June
2013

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00809-0100-4021 December 2019

Device
revision

Software
revision

Hardware
revision

NAMUR
software
revision

NAMUR
hardware
revision

Description Date

revision number 3
and above.

• Wherever possible,

the product ships
with parameters
initialized to
common values.
The product shall
ship with no
uninitialized
parameters that will
keep the
transmitter from
providing its
primary
measurement right
out of the box.

• The product's

default block tags
are be less than or
equal to 16
characters in
length.

• Custom function

blocks were
replaced with
enhanced function
blocks.

• Default block tags

include
underscores, “_”,
instead of white
spaces.

• The CF file has a

better description
of the device,
including
meaningful defaults
and example values.

• Device provides

means to properly
range graphs and
charts in the device
dashboards.

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Introduction Reference Manual

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1.3 Confirm HART revision capability

Confirm the HART capability of the system devices prior to transmitter installation.

Prerequisites

If using HART based control or asset management systems, confirm the HART capability of
those systems prior to transmitter installation. Not all systems are capable of
communicating with HART Revision 7protocol. You can configure the transmitter for
either HART Revision 5 or Revision 7.

Switch HART revision mode

If the HART configuration tool is not capable of communicating with HART Revision 7, the
transmitter will load a Generic Menu with limited capability. The following procedures will
switch the HART revision mode from the Generic Menu.

Procedure

Select Manual Setup → Device Information → Identification → Message.

a) To change to HART Revision 5, enter HART5 in the Message field.

b) To change to HART Revision 7, enter HART7 in the Message field.

10 Rosemount 3144P

(1,500

°F)

T

emperat

u

r

e

Oven

(

1,

0

00 °F)

Tempera

ture

Oven

(

4

82 °

F)

T

em

p

er

ature

Oven

Housing Temperature

Rise Above

Ambient °C (°F)

60 (108)

50 (90)

40 (72)

0

30 (54)

20 (36)

10 (18)

3

4

5 6

7 8 9

Extension Length (in.)

815 °C

250 °

C

5

40 °C

22

3.6

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00809-0100-4021 December 2019

2 Installation

2.1 Installation considerations

2.1.1 General

Electrical temperature sensors, such as resistance temperature detectors (RTDs) and
thermocouples (T/Cs), produce low-level signals proportional to temperature. The
Rosemount X-well™ 3144P Temperature Transmitter converts low-level signals to HART
or FOUNDATION™ Fieldbus and then transmits the signals to the control system via two
power/signal wires.

®

2.1.2

2.1.3

Electrical

Proper electrical installation is essential to prevent errors due to sensor lead resistance and
electrical noise. For HART communications, the current loop must have between 250 and
1100 ohms resistance. Refer to for sensor and current loop connections. Foundation
Fieldbus devices must have proper termination and power conditioning for reliable
operation. Shielded cables must be used for Foundation Fieldbus and may only be
grounded in one place.

Temperature effects

Temperature effects

The transmitter will operate within specifications for ambient temperatures between –40
and 185 °F (–40 and 85 °C). Since heat from the process is transferred from the thermowell
to the transmitter housing, if the expected process temperature is near or beyond
specification limits, consider using additional thermowell lagging, an extension nipple, or
a remote mounting configuration to isolate the transmitter from the process. Figure 2-1
details the relationship between housing temperature rise and extension length.

Figure 2-1: Transmitter Housing Temperature Rise versus Extension Length for a Test
Installation

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Installation

December 2019 00809-0100-4021

Example

The maximum permissible housing temperature rise (T) can be calculated by subtracting
the maximum ambient temperature (A) from the transmitter’s ambient temperature
specification limit (S). For instance, if A = 40 °C.

T = S – A

T = 85 °C – 40 °C

T = 45 °C

For a process temperature of 540 °C (1004 °F), an extension length of 3.6-in (91.4 mm)
yields a housing temperature rise (R) of 22 °C (72 °F), providing a safety margin of 23 °C
(73 °F). A 6.0-in.(152.4 mm) extension length (R = 10 °C [50 °F]) offers a higher safety
margin (35 °C [95 °F]) and reduces temperature-effect errors but would probably require
extra transmitter support. Gauge the requirements for individual applications along this
scale. If a thermowell with lagging is used, the extension length may be reduced by the
length of the lagging.

Reference Manual

2.1.4

2.1.5

Moist or corrosive environments

The Rosemount 3144P Transmitter has a highly reliable dual compartment housing
designed to resist moisture and corrosion. The sealed electronics module is mounted in a
compartment that is isolated from the terminal side with conduit entries. O-ring seals
protect the interior when the covers are properly installed. In humid environments,
however, it is possible for moisture to accumulate in conduit lines and drain into the
housing.

Note

Each transmitter is marked with a tag indicating the approvals. Install the transmitter
according to all applicable installation codes, and approval and installation drawings (see
Rosemount 3144P Product Data Sheet). Verify that the operating atmosphere of the
transmitter is consistent with the hazardous locations certifications. Once a device labeled
with multiple approval types is installed, it should not be reinstalled using any of the other
labeled approval types. To ensure this, the approval label should be permanently marked
to distinguish the approval type(s) used.

Location and position

When choosing an installation location and position, take access to the transmitter into
account.

Terminal side of electronics housing

Mount the transmitter so the terminal side is accessible, allowing adequate clearance for
cover removal. Best practice is to mount the transmitter with the conduit entries in a
vertical position to allow for moisture drainage.

Circuit side of electronics housing

Mount the transmitter so the circuit side is accessible, providing adequate clearance for
cover removal. Additional room is required for LCD display installation. The transmitter
may be mounted directly to or remotely from the sensor. Using optional mounting

12 Rosemount 3144P

Reference Manual Installation

00809-0100-4021 December 2019

brackets, the transmitter may be mounted to a flat surface or a 2.0-in. (50.8 mm)
diameter pipe (see Mounting).

2.1.6 Software compatibility

Replacement transmitters may contain revised software that is not fully compatible with
the existing software. The latest device descriptors (DD) are available with new Field
Communicators or they can be loaded into existing communicators at any Emerson
Service Center or via the Easy Upgrade process. For more information on upgrading a Field
Communicator, see HART Commissioning.

To download new device drivers, visit Emerson.com/Rosemount/Device-Install-Kits.

2.2 Commissioning

The transmitter must be configured for certain basic variables to operate. In many cases,
these variables are pre-configured at the factory. Configuration may be required if the
variables need to be changed.

Commissioning consists of testing the transmitter and verifying transmitter configuration
data. Transmitters can be commissioned either before or after installation. Commissioning
the transmitter on the bench before installation using a Field Communicator or AMS
Device Manager ensures that all transmitter components are in working order.

For more information on using the Field Communicator with the transmitter, see HART

Commissioning. For more information on using the Rosemount 3144 with FOUNDATION

Fieldbus, see FOUNDATION Fieldbus Configuration.

Figure 2-2: Installation Flowchart

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Installation

December 2019 00809-0100-4021

Reference Manual

2.2.1 Setting the loop to manual

Set the process application loop to manual when sending or requesting data that would
disrupt the loop or change the output of the transmitter. The Field Communicator or AMS
Device Manager will prompt to set the loop to manual, when necessary. Acknowledging
the prompt does not set the loop to manual, it is only a reminder. Setting the loop to
manual is a separate operation.

2.2.2 Set switches

The security and simulate switches are located on the top center of the electronics
module.

Note

The factory ships the simulate switch in the "ON" position.

HART

Set the switches without an LCD display

Procedure

1. If the transmitter is installed in a loop, set the loop to manual mode and disconnect
the power.

2.

Remove the housing cover on the electronics side of the transmitter. Do not

remove the transmitter cover in explosive atmospheres with a live circuit.

3. Set the switches to the desired position (see Figure 2-3).

4. Replace the transmitter cover. Both transmitter covers must be fully engaged to
meet explosion-proof requirements.

5. Apply power and set the loop to automatic mode.

Set the switches with an LCD display

Procedure

1. If the transmitter is installed in a loop, set the loop to manual mode and disconnect
the power.

2. Remove the housing cover on the electronics side of the transmitter. Do not
remove the transmitter cover in explosive atmospheres with a live circuit.

3. Unscrew the LCD display screws and gently slide the meter straight off.

4. Set the switches to the desired position (see Figure 2-3).

5. Gently slide the LCD display back into place, taking extra precautions with the 10
pin connection.

6. Replace and tighten the LCD display screws to secure the LCD display.

7. Replace the transmitter cover. Both transmitter covers must be fully engaged to
meet explosion-proof requirements.

8. Apply power and set the loop to automatic mode.

14 Rosemount 3144P

4.37-in. (110,9 mm)

4.40-in. (111,8 mm)

A

B

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00809-0100-4021 December 2019

Installation

FOUNDATION Fieldbus

Set switches without LCD display

Procedure

1. Set the loop to Out-of-Service (OOS) mode (if applicable) and disconnect the
power.

2. Remove the electronics housing cover.

3. Set the switches to the desired position.

4. Reattach housing cover.

5. Apply power and set the loop to in-service mode.

Set switches with LCD display

Procedure

1. Set the loop to OOS (if applicable) and disconnect the power.

2. Remove the housing cover on the electronics side of the transmitter.

3. Unscrew the LCD display screws and gently pull the meter straight off.

4. Set the switches to the desired position.

5. Replace and tighten the LCD display screws to secure the LCD display.

6. Replace the transmitter cover.

7. Apply power and set the loop to In-service mode.

Figure 2-3: Transmitter Switch Locations

Write protect switch (HART and FOUNDATION Fieldbus)

The transmitter is equipped with a write-protect switch that can be positioned to prevent
accidental or deliberate change of configuration data.

Alarm switch (HART Protocol)

An automatic diagnostic routine monitors the transmitter during normal operation. If the
diagnostic routine detects a sensor failure or an electronics failure, the transmitter goes
into alarm (high or low, depending on the position of the failure mode switch).

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The analog alarm and saturation values used by the transmitter depend on whether it is
configured to standard or NAMUR-compliant operation. These values are also custom­configurable in both the factory and the field using the HART Communications. The limits
are:

• 21.0 ≤ I ≤ 23 for high alarm

• 20.5 ≤ I ≤ 20.9 for high saturation

• 3.70 ≤ I ≤ 3.90 for low saturation

• 3.50 ≤ I ≤ 3.75 for low alarm

Note

A 0.1 mA separation between low saturation and low alarm is required.

Table 2-1: Values for Standard and NAMUR Operation

Standard operation (factory default) NAMUR-compliant operation

Fail high 21.75 mA ≤ I Fail high 21.0 mA ≤ I

High saturation 20.5 mA High saturation 20.5 mA

Low saturation 3.9 mA Low saturation 3.8 mA

Fail low I ≤ 3.75 mA Fail low I ≤ 3.6 mA

Simulate switch (FOUNDATION Fieldbus)

Simulate switch is used to replace the channel value coming from the sensor transducer
block. For testing purposes, it manually simulates the output of the analog input block to a
desired value.

2.3 Mounting

If possible, the transmitter should be mounted at a high point in the conduit run so
moisture from the conduits will not drain into the housing. The terminal compartment
could fill with water if the transmitter is mounted at a low point in the conduit run. In some
instances, the installation of a poured conduit seal, such as the one pictured in Figure 2-5,
is advisable. Remove the terminal compartment cover periodically and inspect the
transmitter for moisture and corrosion.

Figure 2-4: Incorrect Conduit Installation

16 Rosemount 3144P

A

D

B

E

F

C

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Figure 2-5: Recommended Mounting with Drain Seal

A. Sealing compound

B. Union coupling with extension
C. Conduit for field wiring
D. Thermowell

E. Sensor hex

F. Poured conduit seal (where required)

If mounting the transmitter directly to the sensor assembly, use the process shown in

Figure 2-6. If mounting the transmitter apart from the sensor assembly, use conduit

between the sensor and transmitter. The transmitter accepts male conduit fittings with ½
–14 NPT, M20 × 1.5 (CM 20), PG 13.5 (PG 11), or JIS G ½ threads (M20 × 1.5 (CM 20),
PG 13.5 (PG 11), or JIS G ½ threads are provided by an adapter). Make sure only qualified
personnel perform the installation.

The transmitter may require supplementary support under high-vibration conditions,
particularly if used with extensive thermowell lagging or long extension fittings. Pipe­stand mounting, using one of the optional mounting brackets, is recommended for use in
high-vibration conditions.

2.4 Installation

Installation is to be performed by qualified personnel. No special installation is required in
addition to the standard installation practices outlined in this document. Always ensure a
proper seal by installing the electronics housing cover(s) so that metal contacts metal.

The loop should be designed so the terminal voltage does not drop below 12 Vdc when
the transmitter output is 24.5 mA.

Environmental limits are available in the Rosemount 3144P Temperature Transmitter

Product Page.

Reference Manual 17

A

B

C

E

D

Installation Reference Manual

December 2019 00809-0100-4021

2.4.1 Typical North American installation

Figure 2-6: Typical Direct-Mounted Configuration

A. Thermowell

B. Extension (nipple)
C. Union or coupling
D. Conduit for field wiring (dc power)

E. Extension fitting length

Procedure

1. Mount the thermowell to the process container wall.

2. Install and tighten thermowells.

3. Perform a leak check.

4. Attach any necessary unions, couplings, and extension fittings. Seal the fitting

threads with an approved thread sealant, such as silicone or PTFE tape (if required).

5. Screw the sensor into the thermowell or directly into the process (depending on

installation requirements).

6. Verify all sealing requirements.

7. Attach the transmitter to the thermowell/sensor assembly. Seal all threads with an

approved thread sealant, such as silicone or PTFE tape (if required).

8. Install field wiring conduit into the open transmitter conduit entry (for remote

mounting) and feed wires into the transmitter housing.

9. Pull the field wiring leads into the terminal side of the housing.

10. Attach the sensor leads to the transmitter sensor terminals.
The wiring diagram is located inside the housing cover.

11. Attach and tighten both transmitter covers.

18 Rosemount 3144P

A

B

C

D

E

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00809-0100-4021 December 2019

Installation

2.4.2 Typical European installation

Figure 2-7: Typical Remote-Mounted Configuration with Cable Glands

A. Cable gland

B. Shielded cable from sensor to transmitter
C. Shielded cable from transmitter to control room
D. 2-in. (50 mm) pipe

E. B4 mounting bracket

2.4.3

Procedure

1. Mount the thermowell to the process container wall.

2. Install and tighten thermowells.

3. Perform a leak check.

4. Attach a connection head to the thermowell.

5. Insert sensor into the thermowell and wire the sensor to the connection head.

The wiring diagram is located inside the connection head.

6. Mount the transmitter to a 2-in. (50 mm) pipe or a panel using one of the optional

mounting brackets.

7. Attach cable glands to the shielded cable running from the connection head to the

transmitter conduit entry.

8. Run the shielded cable from the opposite conduit entry on the transmitter back to

the control room.

9. Insert shielded cable leads through the cable entries into the connection head/

transmitter. Connect and tighten cable glands.

10. Connect the shielded cable leads to the connection head terminals (located inside
the connection head) and to the sensor wiring terminals (located inside the
transmitter housing).

Rosemount X-well installation

Rosemount X-well™ Technology is for temperature monitoring applications and is not
intended for control or safety applications. It is available in the Rosemount 3144P
Temperature Transmitter in a factory assembled direct mount configuration with a
Rosemount 0085 Pipe Clamp Sensor. It cannot be used in a remote mount configuration.
Rosemount X-well Technology will only work as specified with factory supplied and

Reference Manual 19

assembled Rosemount 0085 Pipe Clamp silver tipped single element sensor with an 80
mm extension length. It will not work as specified if used with other sensors. Installation

Installation

December 2019 00809-0100-4021

and use of incorrect sensor will result in inaccurate process temperature calculations. It is

extremely important that the above requirements and installation steps below are
followed to ensure that Rosemount X-well Technology works as specified.

In general, pipe clamp sensor installation best practices shall be followed. See Rosemount
0085 Pipe Clamp Sensor Quick Start Guide with Rosemount X-well Technology specific
requirements noted:

1. Mount transmitter directly on pipe clamp sensor in order for Rosemount X-well
Technology to properly function.

2. Install assembly away from dynamic external temperature sources such as a boiler
or heat tracing.

3. Ensure for the pipe clamp sensor tip to make direct contact with the pipe surface for
Rosemount X-well Technology. Moisture build-up between sensor and pipe surface,
or sensor hang-up in assembly can cause inaccurate process temperature
calculations. Refer to installation best practices in Rosemount 0085 Pipe Clamp
Sensor Quick Start Guide to ensure proper sensor to pipe surface contact.

4. Insulation ½-in. thick minimum with a R-value of > 0.42 m² × K/W) is required over
the sensor clamp assembly and sensor extension up to transmitter head to prevent
heat loss. Apply a minimum of six inches of insulation on each side of the pipe
clamp sensor. Care should be taken to minimize air gaps between insulation and
pipe.

Reference Manual

2.4.4

Note

DO NOT apply insulation over transmitter head as it will result in longer response
times and may damage transmitter electronics.

5. Although it will come factory configured as such, ensure that pipe clamp RTD
sensor is assembled in 4-wire configuration.

Figure 2-8: Rosemount 3144P Transmitter with Rosemount X-well Technology
Installation

Install Rosemount X-well in conjunction with a Rosemount 333 Tri-Loop (HART/4–20 mA only)

Use the dual-sensor option Rosemount 3144P Transmitter that is operating with two
sensors in conjunction with a Rosemount 333 HART Tri-Loop™ HART-to-Analog Signal
Converter to acquire an independent 4–20 mA analog output signal for each sensor input.

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The transmitter can be configured to output four of the six following digital process
variables:

• Sensor 1

• Sensor 2

• Differential temperature

• Average temperature

• First good temperature

• Transmitter terminal temperature

• Surface temperature (Rosemount X-well only)

The HART Tri-Loop reads the digital signal and outputs any or all of these variables into as
many as three separate 4–20 mA analog channels.

Refer to Figure 2-9 for basic installation information. Refer to the Rosemount 333 HART­to-Analog Reference Manual signal converter for complete installation information.

Figure 2-9: HART Tri-Loop Installation Flowchart

(1)

(1) See Use with the HART Tri-Loop for configuration information.

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2.4.5 LCD display

Transmitters ordered with the LCD display option (code M5) are shipped with the LCD
display installed. After-market installation of the LCD display on a conventional transmitter
requires a small instrument screwdriver and the LCD display kit, which includes:

• LCD display assembly

• Extended cover with cover O-ring in place

• Captive screws (quantity 2)

• 10-pin interconnection header

To install the LCD display:

Procedure

1. If the transmitter is installed in a loop, set the loop to manual (HART)/out-of-service
(FOUNDATION Fieldbus) mode and disconnect the power.

2. Remove the housing cover from the electronics side of the transmitter. Do not
remove the transmitter covers in explosive atmospheres with a live circuit.

3. Ensure that the transmitter write protect switch is set to the Off position. If
transmitter security is On, the transmitter cannot be configured to recognize the
LCD display. If security On is desired, configure the transmitter for the LCD display,
and then install the meter.

4. Insert the interconnection header in the 10-pin socket on the face of the electronics
module. Insert the pins into the electronics LCD display interface.

5. The meter can be rotated in 90-degree increments for easy viewing. Position one of
the four 10-pin sockets on the back of the meter to accept the interconnection
header.

6. Attach the LCD display assembly to the interconnection pins, then thread and
tighten the LCD display screws into the holes on the electronics module.

7. Attach the extended cover; tighten at least one-third turn after the O-ring contacts
the transmitter housing. Both transmitter covers must be fully engaged to meet
explosion proof requirements.

8. Apply power and set the loop to automatic (HART)/in-service (FOUNDATION Fieldbus)
mode.

Once the LCD display is installed, configure the transmitter to recognize the meter
option. Refer to LCD display options or LCD display transducer block (index number

1200) (FOUNDATION Fieldbus).

Note

Observe the following LCD display temperature limits:

Operating: –40 to 185 °F (–40 to 85 °C)

Storage: –76 to 185 °F (–60 to 85 °C)

22 Rosemount 3144P

A

B

C

D

E

F

G

H

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Installation

2.4.6 Multichannel installation (HART/4–20 mA only)

Several transmitters can be connected to a single master power supply (see figure below).
In this case, the system may be grounded only at the negative power supply terminal. In
multichannel installations, where several transmitters depend on one power supply and
the loss of all transmitters would cause operational problems, consider an uninterrupted
power supply or a back-up battery. The diodes shown in Figure 2-10 prevent unwanted
charging or discharging of the back-up battery.

Figure 2-10: Multichannel Installations

Between 250 and 1100 Ω If no load resistor

A. Transmitter 1

B. Transmitter 2

C. R

Lead

D. Readout or controller 1

E. Readout or controller 2

F. Battery backup

G. Power supply dc

2.5 Wiring

2.5.1 HART/4–20 mA

Field wiring

The power to the transmitter is supplied over the signal wiring. Signal wiring does not
need to be shielded, but twisted pairs should be used for best results. Do not run
unshielded signal wiring in conduit or open trays with power wiring or near heavy electrical
equipment because high voltage may be present on the leads and may cause an electrical
shock.

Note

Do not apply high voltage (e.g., AC line voltage) to the power or sensor terminals, since
high voltage can damage the unit.

To wire the transmitter for power:

Reference Manual 23

“-”

“+”

Test

A

B

B

A

“+”

“-”

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Figure 2-11: Transmitter Terminal Block Wiring Connection

Wiring connection

Wiring connection

(with “T1” integral transient protection

option)

A. Sensor terminals (1–5)

B. Ground

Figure 2-12: Sensor Wiring Diagram for HART/4–20 mA

Single-sensor connections

Dual-sensor connections

(1) (2)

(1) Transmitter must be configured for a 3-wire RTD in order to recognize an RTD with a

compensation loop.

(2) Emerson provides 4-wire sensors for all single-element RTDs. Use these RTDs in 2- or 3-wire

24 Rosemount 3144P

configurations by leaving the unneeded leads disconnected and insulated with electrical tape.

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Procedure

1. Remove the transmitter covers.
Do not remove the transmitter covers in an explosive atmosphere when the circuit

is live.

2. Connect the positive power lead to the terminal marked “+” and the negative
power lead to the terminal marked “–” as shown in Figure 2-11.

Crimped lugs are recommended when wiring to screw terminals.

3. Tighten the terminal screws to ensure good contact is made. No additional power
wiring is required.

4. Replace the transmitter covers making sure both transmitter covers are fully
engaged to meet explosion-proof requirements.

Power/current loop connections

Use copper wire of a sufficient size to ensure that the voltage across the transmitter power
terminals does not go below 12.0 Vdc.

1. Connect the current signal leads as shown in Figure 2-13.

2. Recheck the polarity and connections.

3. Turn the power ON.

For information about multichannel installations, refer to Multichannel installation

(HART/4–20 mA only).

Note

Do not connect the power/signal wiring to the test terminal. The voltage present on the
power/signal leads may burn out the reverse-polarity protection diode built into the test
terminal. If the test terminal’s reverse polarity protection diode is burned out by the
incorrect power/signal wiring, the transmitter can still be operated by jumping the current
from the test terminal to the “–” terminal. See Test terminal (HART/4–20 mA only) for use
of the terminal.

Reference Manual 25

A

C

or*

B

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Figure 2-13: Connecting a Field Communicator to a Transmitter Loop (HART/4–20
mA)

A. Power/signal terminals

B. 250 ≤ RL ≤ 1100

C. Power supply

Note

The signal wire may be grounded at any point or left ungrounded.

Note

AMS Device Manager software or a Field Communicator can be connected at any
termination point in the signal loop. The signal loop must have between 250 and 1100
ohms load for communications.

26 Rosemount 3144P

A

C

B

B

C

A

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2.6 Foundation Fieldbus

Figure 2-14: Transmitter Terminal Block

Wiring connection Wiring connection

(with “T1” integral transient protection option)

A. Sensor terminals (1–5)

B. Power terminals

C. Ground

Figure 2-15: Sensor Wiring Diagram for FOUNDATION Fieldbus

Single-sensor connections

Dual-sensor connections

(1) (2)

(1) Transmitter must be configured for a 3-wire RTD in order to recognize an RTD with a

compensation loop.

(2) Emerson provides 4-wire sensors for all single-element RTDs. Use these RTDs in 2- or 3-wire

Reference Manual 27

configurations by leaving the unneeded leads disconnected and insulated with electrical tape.

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RTD or ohm inputs

If the transmitter is mounted remotely from a 3- or 4-wire RTD, it will operate within
specifications, without recalibration, for lead wire resistances of up to 60 ohms per lead
(equivalent to 1,000 ft. of 20 AWG wire). In this case, the leads between the RTD and
transmitter should be shielded. If using only two leads (or a compensation loop lead wire
configuration), both RTD leads are in series with the sensor element, so significant errors
can occur if the lead lengths exceed one foot of 20 AWG wire. For longer runs, attach a
third or fourth lead as described above. To eliminate 2-wire lead resistance error, the 2­wire offset command can be used. This allows the user to input the measured lead wire
resistance, resulting in the transmitter adjusting the temperature to correct the error.

When using Rosemount X-well Technology, the Rosemount 3144P Temperature
Transmitter is required to be assembled to a Rosemount 0085 Pipe Clamp RTD Sensor in a
direct mount 4-wire configuration. It can be changed to 3- or 2-wired configuration, if
required, in the field.

Thermocouple or millivolt inputs

For direct-mount applications, connect the thermocouple directly to the transmitter. If
mounting the transmitter remotely from the sensor, use appropriate thermocouple
extension wire. Make connections for millivolt inputs with copper wire. Use shielding for
long runs of wire.

Reference Manual

Note

For HART transmitters, the use of two grounded thermocouples with a dual option
transmitter is not recommended. For applications in which the use of two thermocouples
is desired, connect either two ungrounded thermocouples, one grounded and one
ungrounded thermocouple, or one dual element thermocouple.

2.7 Power supply

HART

An external power supply is required to operate the transmitter (not included). The input
voltage range of the transmitter is 12 to 42.4 Vdc. This is the power required across the
transmitter power terminals. The power terminals are rated to 42.4 Vdc. With 250 ohms
of resistance in the loop, the transmitter requires a minimum of 18.1 Vdc for
communication.

The power supplied to the transmitter is determined by the total loop resistance and
should not drop below the lift-off voltage. The lift-off voltage is the minimum supply
voltage required for any given total loop resistance. See Figure 2-16 to determine the
required supply voltage. If the power drops below the lift-off voltage while the transmitter
is being configured, the transmitter may output incorrect information.

The dc power supply should provide power with less than two percent ripple. The total
resistance load is the sum of the resistance of the signal leads and the load resistance of
any controller, indicator, or related piece of equipment in the loop. Note that the
resistance of intrinsic safety barriers, if used, must be included.

Note

Permanent damage to the transmitter could result if the voltage drops below 12.0 Vdc at
the power terminals, when changing transmitter configuration parameters.

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Figure 2-16: Load Limits

Maximum load = 40.8 × (Supply voltage–12.0)

FOUNDATION Fieldbus

Powered over FOUNDATION Fieldbus with standard Fieldbus power supplies, the transmitter
operates between 9.0 and 32.0 Vdc, 11 mA maximum. Transmitter power terminals are
rated to 42.4 Vdc.

Installation

The power terminals on the transmitter are polarity insensitive.

2.7.1

Surges/transients

The transmitter will withstand electrical transients of the energy level usually encountered
in static discharges or induced switching; however, high-voltage transients, such as those
induced in wiring from nearby lightning strikes, can damage both the transmitter and the
sensor.

The integral transient protection terminal block (option code T1) protects against high­voltage transients. The integral transient protection terminal block is available as an
ordered option, or as an accessory.

2.8 Grounding

Sensor shielding

The currents in the leads induced by electromagnetic interference can be reduced by
shielding. Shielding carries the current to ground and away from the leads and electronics.
If the ends of the shields are adequately grounded, only a small amount of current will
actually enter the transmitter.

If the ends of the shield are left ungrounded, voltage is created between the shield and the
transmitter housing and also between the shield and earth at the element end. The
transmitter may not be able to compensate for this voltage, causing it to lose
communication and/or go into alarm. Instead of the shield carrying the currents away
from the transmitter, the currents will now flow through the sensor leads into the
transmitter circuitry where it will interfere with the circuit operation.

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2.8.1 Ungrounded thermocouple, mV, and RTD/ohm inputs

Option 1: Recommended for ungrounded transmitter housing

1. Connect the signal wiring shield to the sensor wiring shield.

2. Ensure the two shields are tied together and electrically isolated from the
transmitter housing.

3. Ground the shield at the power supply end only.

4. Ensure the shield at the sensor is electrically isolated from the surrounding fixtures
that may be grounded.

a. Connect shields together, electrically isolated from the transmitter.

A. Sensor wires
B. Transmitter
C. 4-20 mA loop

D. Shield ground point

E. DCS

Option 2: Recommended for grounded transmitter housing

1. Ground the transmitter housing then connect the sensor wiring shield to the
transmitter housing (see Transmitter housing).

2. Ensure the shield at the sensor end is electrically isolated from surrounding fixtures
that may be grounded.

3. Ground the signal wiring shield at the power supply end.

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A. Sensor wires
B. Transmitter
C. 4-20 mA loop

D. Shield ground point

E. DCS

Option 3

Installation

1. Ground the sensor wiring shield at the sensor, if possible.

2. Ensure the sensor wiring and signal wiring shields are electrically isolated from the
transmitter housing and other fixtures that may be grounded.

3. Ground the signal wiring shield at the power supply end.

A. Sensor wires
B. Transmitter
C. 4-20 mA loop

D. Shield ground point

E. DCS

2.8.2

Reference Manual 31

Grounded thermocouple inputs

Procedure

1. Ground the sensor wiring shield at the sensor.

2. Ensure the sensor wiring and signal wiring shields are electrically isolated from the
transmitter housing and other fixtures that may be grounded.

A

B

D

C

E

D

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3. Ground the signal wiring shield at the power supply end.

A. Sensor wires
B. Transmitter
C. 4–20 mA loop

D. Shield ground point

E. DCS

2.8.3

Transmitter housing

Ground the transmitter housing according to local or site electrical requirements. An
internal ground terminal is standard. An optional external ground lug assembly (option
code G1) can also be ordered, if needed. Ordering certain hazardous approvals
automatically includes an external ground lug.

2.9 Wire and apply power

Connect the transmitter to a FOUNDATION Fieldbus network. Two terminators and a power
conditioner are required. The voltage at the transmitter terminal must be between nine
and 32 Vdc to operate properly.

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3 HART Commissioning

3.1 Overview

This section contains information on commissioning and tasks that should be performed
on the bench prior to installation. This section contains Rosemount™ 3144P HART
Configuration information only. The Field Communicator and 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.

HART 7 Fast Keys

AMS Device Manager help can be found in the AMS Device Manager on-line guides within
the AMS Device Manager system.

1, 2, 3, etc.

3.2 Confirm HART revision capability

If using HART based control or asset management systems, confirm the HART Protocol
capability of those systems prior to transmitter installation. Not all systems are capable of
communicating with HART Revision 7. This transmitter can be configured for either HART
Revision 5 or Revision 7.

3.2.1

Switch HART revision mode

If the HART Protocol configuration tool is not capable of communicating with HART
Revision 7, the transmitter will load a generic menu with limited capability. The following
procedures will switch the HART Revision mode from the generic menu:

®

Procedure

Select Manual Setup > Device Information > Identification > Message.

a. To change to HART Revision 5, Enter “HART5” in the Message field.

b. To change to HART Revision 5, Enter “HART7” in the Message field.

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3.3 Safety messages

Instructions and procedures in this section may require special precautions to ensure the
safety of the personnel performing the operations. Information that potentially raises
safety issues is indicated by a warning symbol ( ). Refer to the following safety messages
before performing an operation preceded by this symbol.

WARNING

Explosions could result in death or serious injury.

• Do not remove the instrument cover in explosive atmospheres when the circuit is live.

• Before connecting a handheld communicator in an explosive atmosphere, ensure that

the instruments in the loop are installed in accordance with intrinsically safe or non­incendive field wiring practices.

• Both transmitter covers must be fully engaged to meet explosion-proof requirements.

Electrical shock could cause death or serious injury.

• If the sensor is installed in a high-voltage environment and a fault or installation error

occurs, high voltage may be present on transmitter leads and terminals.

• Use extreme caution when making contact with the leads and terminals.

Process leaks could result in death or serious injury.

• Do not remove the thermowell while in operation.

• Install and tighten thermowells and sensors before applying pressure.

3.4 Field Communicator

The menu tree and Fast Key sequences use the following device revisions:

• Device dashboard: Device revision 5 and 7, DD v1

The Field Communicator exchanges information with the transmitter from the control
room, the instrument site, or any wiring termination point in the loop. To facilitate
communication, connect the Field Communicator in parallel with the transmitter (see

Figure 2-16) using the loop connection ports on the top of the field communicator. The

connections are non-polarized. Do not make connections to the nickel–cadmium (NiCad)
recharger jack in explosive atmospheres. Before connecting the Field Communicator in an
explosive atmosphere, make sure the instruments in the loop are installed according to
intrinsically safe or non-incendive field wiring practices.

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3.4.1 Updating the HART communication software

The Field Communicator software may need to be updated to take advantage of the
additional features available in the latest Rosemount 3144P Transmitter. Perform the
following steps to determine if an upgrade is necessary.

Procedure

1. Select Rosemount from the list of manufacturers 5 and 6 and 3144 Temp from the

list of models

2. If the Field Device Rev choices include “Dev v1”, “Dev v2”, “Dev v3”, or “Dev v4”

(with any DD version), then the user will be able to connect to the device with
reduced functionality. To unlock full functionality, download and install the new
DD.

Note

The original release of the safety-certified Rosemount 3144P uses the name “3144P
SIS” from the model list and requires “Dev v2, DD v1.”

Note

If communication is initiated with an improved Rosemount 3144P using a
communicator that only has a previous version of the transmitter device descriptors
(DDs), the communicator will display the following message:

NOTICE: Upgrade to the field communicator software to access new XMTR functions.
Continue with old description?

YES: The communicator will communicate properly with the transmitter using the
existing transmitter

DDs. However, new software features of the DD in the communicator will not be
accessible.

NO: The communicator will default to a generic transmitter functionality.

If YES is selected after the transmitter is configured to utilize the new features of the
improved transmitters (such as Dual Input configuration or one of the added sensor
input types–DIN Type L or DIN Type U), the user will experience trouble
communicating with the transmitter and will be prompted to turn the
communicator off. To prevent this from happening, either upgrade the
communicator to the latest DD or answer NO to the above question and default to
the generic transmitter functionality.

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3.4.2 Device Dashboard menu tree

Figure 3-1: HART 5- Overview

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Figure 3-2: HART 5 - Configure

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Figure 3-3: HART 5- Service Tools

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Figure 3-4: HART 7- Overview

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Figure 3-5: HART 7- Configure

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Figure 3-6: HART 7- Service Tools

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3.4.3 Device dashboard Fast Key sequence

Fast Key sequences are listed below for common Rosemount 3144P Transmitter functions.

Note

The Fast Key sequences assume that “Device Revision Dev 5 (HART 5) or v7 (HART 7), DD
v1” is being used. Table 3-1 provides alphabetical function lists for all Field Communicator
tasks as well as their corresponding Fast Key sequences.

Table 3-1: Fast Key Sequences

Function HART 5 Fast Keys HART 7 Fast Keys

2-wire offset Sensor 1 2, 2, 1, 5 2, 2, 1, 6

2-wire offset Sensor 2 2, 2, 2, 5 2, 2, 2, 6

Alarm values 2, 2, 5, 6 2, 2, 5, 6

Analog calibration 3, 4, 5 3, 4, 5

Analog output 2, 2, 5 2, 2, 5

Average temperature setup 2, 2, 3, 3 2, 2, 3, 3

Burst mode N/A 2, 2, 8, 4

Comm status N/A 1, 2

Configure additional messages N/A 2, 2, 8, 4, 7

Configure Hot Backup

Date 2, 2, 7, 1, 2 2, 2, 7, 1, 3

Descriptor 2, 2, 7, 1, 3 2, 2, 7, 1, 4

Device information 2, 2, 7, 1 2, 2, 7, 1

Differential temperature setup 2, 2, 3, 1 2, 2, 3, 1

Filter 50/60 Hz 2, 2, 7, 5, 1 2, 2, 7, 5, 1

Find device N/A 3, 4, 6, 2

First good temperature setup 2, 2, 3, 2 2, 2, 3, 2

Hardware revision 1, 8, 2, 3 1, 11, 2, 3

HART Lock N/A 2, 2, 9, 2

Intermittent sensor detect 2, 2, 7, 5, 2 2, 2, 7, 5, 2

Lock status N/A 1, 11, 3, 7

Long tag N/A 2, 2, 7, 2

Loop test 3, 5, 1 3, 5, 1

™

2, 2, 4, 1, 3 2, 2, 4, 1, 3

LRV (Lower Range Value) 2, 2, 5, 5, 3 2, 2, 5, 5, 3

Message 2, 2, 7, 1, 4 2, 2, 7, 1, 5

Open sensor holdoff 2, 2, 7, 4 2, 2, 7, 4

Percent range 2, 2, 5, 4 2, 2, 5, 4

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Table 3-1: Fast Key Sequences (continued)

Function HART 5 Fast Keys HART 7 Fast Keys

Sensor 1 configuration 2, 2, 1 2, 2, 2

Sensor 1 serial number 2, 2, 1, 7 2, 2, 1, 8

Sensor 1 setup 2, 2, 1 2, 2, 1

Sensor 1 status N/A 2, 2, 1, 2

Sensor 1 type 2, 2, 1, 2 2, 2, 1, 3

Sensor 1 unit 2, 2, 1, 4 2, 2, 1, 5

Sensor 2 configuration 2, 2, 2 2, 2, 2

Sensor 2 serial number 2, 2, 2, 7 2, 2, 2, 8

Sensor 2 setup 2, 2, 2 2, 2, 2

Sensor 2 status N/A 2, 2, 2, 2

Sensor 2 type 2, 2, 2, 2 2, 2, 2, 3

Sensor 2 unit 2, 2, 2, 4 2, 2, 2, 5

Sensor drift alert 2, 2, 4, 2 2, 2, 4, 2

Simulate device variables N/A 3, 5, 2

Software revision 1, 8, 2, 4 1, 11, 2, 4

Tag 2, 2, 7, 1, 1 2, 2, 7, 1, 1

Terminal temperature units 2, 2, 7, 3 2, 2, 7, 3

URV (Upper Range Value) 2, 2, 5, 5, 2 2, 2, 5, 5, 2

Variable mapping 2, 2, 8, 5 2, 2, 8, 5

Thermocouple diagnostic 2, 1, 7, 1 2, 1, 7, 1

Min/max tracking 2, 1, 7, 2 2, 1, 7, 2

Rosemount X-well™ setup N/A 2, 2, 1, 11

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3.5 Review configuration data

Before operating the transmitter in an actual installation, review all of the factory-set
configuration data to ensure that it reflects the current application.

3.5.1 Review

HART 5 Fast Keys 1, 4

HART 7 Fast keys 2, 2

Field Communicator

Review the transmitter configuration parameters set at the factory to ensure accuracy and
compatibility with the particular application. After activating the Review function, scroll
through the data list and check each variable. If changes to the transmitter configuration
data are necessary, refer to Configuration.

3.6 Check output

Before performing other transmitter online operations, review the configuration of the
Rosemount 3144P Transmitter digital output parameters to ensure that the transmitter is
operating properly.

3.6.1

Analog output

HART 5 Fast Keys 2, 2, 5

HART 7 Fast Keys 2, 2, 5

Field Communicator

The Rosemount 3144P process variables provide the transmitter output. The PROCESS
VARIABLE menu displays the process variables, including sensed temperature, percent
range, and analog output. These process variables are continuously updated. The primary
variable is 4–20 mA analog signal.

3.7 Configuration

The Rosemount 3144P must have certain basic variables configured to operate. In many
cases, these variables are pre-configured at the factory. Configuration may be required if
the configuration variables need revision.

3.7.1

44 Rosemount 3144P

Variable mapping

HART 5 Fast Keys 2, 2, 8, 5

HART 7 Fast Keys 2, 2, 8, 5

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Field Communicator

The Variable Mapping menu displays the sequence of the process variables. Select 5
Variable Re-Map to change this configuration. The Rosemount 3144P single sensor input
configuration screens allow selection of the primary variable (PV) and the secondary
variable (SV). When the Select PV screen appears Snsr 1 or Terminal Temperature must
be selected.

The Rosemount 3144P dual-sensor option configuration screens allow selection of the
primary variable (PV), secondary variable (SV), tertiary variable (TV), and quaternary
variable (QV). Variable choices are Sensor 1, Sensor 2, Differential Temperature, Average
Temperature, First-Good Temperature, Terminal Temperature, and Not Used. The primary
variable is the 4–20 mA analog signal.

3.7.2 Sensor configuration

HART 5 Fast Keys 2, 1, 1

HART 7 Fast Keys 2, 1, 1

3.7.3

Field Communicator

Sensor configuration contains information for updating the sensor type, connections,
units, and damping.

Change type and connections

HART 5 Fast Keys

HART 7 Fast Keys

The connections command allows the user to select the sensor type and the number of
sensor wires to be connected from the following list:

• 2-, 3-, or 4-wire Pt 100, Rosemount X-well, Pt 200, Pt 500, Pt 1000 (platinum) RTDs (α =

0.00385 Ω/Ω/°C)

• 2-, 3-, or 4-wire Pt 100, Pt 200 (platinum) RTDs (α = 0.003916 Ω/Ω/°C)

• 2-, 3-, or 4-wire Ni 120 (nickel) RTDs

• 2-, 3-, or 4-wire Cu 10 (copper) RTDs

• IEC/NIST/DIN Type B, E, J, K, R, S, T thermocouples

Sensor 1: 2, 2, 1
Sensor 2: 2, 2, 2

Sensor 1: 2, 2, 1
Sensor 2: 2, 2, 2

• DIN type L, U thermocouples

• ASTM Type W5Re/W26Re thermocouple

• GOST Type L thermocouples

• –10 to 100 millivolts

• 2-, 3-, or 4-wire 0 to 2000 ohms

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Contact an Emerson representative for information on temperature sensors, thermowells,
and accessory mounting hardware that is available through Emerson.

3.7.4 Output units

3.7.5

HART 5 Fast Keys

HART 7 Fast Keys

The Sensor 1 unit and Sensor 2 unit commands set the desired primary variable units. The
transmitter output can be set to one of the following engineering units:

• Degrees Celsius

• Degrees Fahrenheit

• Degrees Rankine

• Kelvin

• Ohms

• Millivolts

Sensor 1: 2, 2, 1, 4
Sensor 2: 2, 2, 2, 4

Sensor 1: 2, 2, 1, 5
Sensor 2: 2, 2, 2, 5

Sensor 1 serial number

HART 5 Fast Keys 2, 2, 1, 7

HART 7 Fast Keys 2, 2, 1, 8

3.7.6

The serial number of the attached sensor can be listed in the sensor 1 S/N variable. It is
useful for identifying sensors and tracking sensor calibration information.

Sensor 2 serial number

HART 5 Fast Keys 2, 2, 2, 7

HART 7 Fast Keys 2, 2, 2, 8

The serial number of a second sensor can be listed in the sensor 2 S/N variable.

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3.7.7 2-wire RTD offset

3.7.8

3.7.9

HART 5 Fast Keys

HART 7 Fast Keys

The 2-wire offset command allows the measured lead wire resistance to be input, which
results in the transmitter adjusting its temperature measurement to correct the error
caused by this resistance. Because of a lack of lead wire compensation within the RTD,
temperature measurements made with a 2-wire RTD are often inaccurate.

Sensor 1: 2, 2, 1, 5
Sensor 2: 2, 2, 2, 5

Sensor 1: 2, 2, 1, 6
Sensor 2: 2, 2, 2, 6

Terminal (body) temperature

HART 5 Fast Keys 2, 2, 7, 3

HART 7 Fast Keys 2, 2, 7, 3

The Terminal Temp command sets the terminal temperature units to indicate the
temperature at the transmitter terminals.

Dual-sensor configuration

HART 5 Fast Keys 2, 2, 3

HART 7 Fast Keys 2, 2, 3

Dual-sensor configuration sets the functions that can be used with a dual-sensor
configured transmitter, including differential temperature, average temperature, first
good temperature.

Differential pressure

HART 5 Fast Keys

HART 7 Fast Keys 2, 2, 3, 1

Field Communicator

The transmitter configured for a dual-sensor can accept any two inputs then display the
differential temperature between them. Use the following procedure with traditional Fast
Keys to configure the transmitter to measure differential temperature:

Note

This procedure reports the differential temperature as the primary variable analog signal.
If this is not needed, assign differential temperature to the secondary, tertiary, or
quaternary variable.

Note

The transmitter determines the differential temperature by subtracting the reading of
Sensor 2 from Sensor 1 (S1– S2). Ensure this order of subtraction is consistent with the

2, 2, 3, 1

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desired reading for the application. Refer to Figure 2-4, or inside the transmitter terminal­side cover for sensor wiring diagrams.

If using an LCD display for local indication, configure the meter to read the appropriate
variables by using LCD display options.

Average temperature

HART 5 Fast Keys 2, 2, 3, 3

HART 7 Fast Keys 2, 2, 3, 3

Field Communicator

The transmitter configured for dual-sensors can output and display the average
temperature of any two inputs. Use the following procedure with Traditional Fast Keys to
configure the transmitter to measure the average temperature:

Configure sensor 1 and sensor 2 appropriately. Select 1 Device Setup, 3 Configuration, 2
Sensor Configuration, 1 Change Type and Conn. to set the sensor type and number of wires
for sensor 1. Repeat for Sensor 2.

Note

This procedure configures the average temperature as the primary variable analog signal.
If this is not needed, assign the average temperature to the secondary, tertiary, or
quaternary variable.

If using an LCD display, configure it to read the appropriate variables using LCD display

options.

Note

If Sensor 1 and/or sensor 2 should fail while PV is configured for average temperature and
the Hot Backup feature is not enabled, the transmitter will go into alarm. For this reason, it
is recommended when PV is sensor average, that the Hot Backup feature be enabled when
dual-element sensors are used, or when two temperature measurements are taken from
the same point in the process. If a sensor failure occurs when the Hot Backup feature is
enabled, while PV is sensor average, three scenarios could result:

• If sensor 1 fails, the average will only be reading from sensor 2, the working sensor.

• If sensor 2 fails, the average will only be reading from sensor 1, the working sensor.

• If both sensors fail simultaneously, the transmitter will go into alarm and the status

available (via HART) states that both sensor 1 and sensor 2 have failed.

In the first two scenarios, the 4–20 mA signal is not disrupted and the status available to
the control system (via HART Protocol) specifies which sensor has failed.

First good configuration

HART 5 Fast Keys

HART 7 Fast Keys 2, 2, 3, 2

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Field Communicator

The first good device variable is useful for applications where dual-sensors (or a single dual
element sensor) are used in a single process. The first good variable will report the sensor 1
value, unless sensor 1 fails. When sensor 1 fails, the sensor 2 value will be reported as the
first good variable. Once the first good variable has switched to sensor 2, it will not revert
back to sensor 1 until a master reset occurs or “Suspend Non-PV alarms” is disabled. When
the PV is mapped to first good variable and either sensor 1 or sensor 2 fails, the analog
output will go to the alarm level, but the digital PV value read through the HART Protocol
interface will still report the proper first good sensor value.

If the user does not want the transmitter to go into analog output alarm when the PV is
mapped to first good and Sensor 1 fails, enable “Suspend Non-PV Alarm” mode. This
combination prevents the analog output from going to the alarm level unless BOTH
sensors fail.

Hot Backup feature configuration

HART 5 Fast Keys

HART 7 Fast Keys 2, 2, 4, 1, 3

Field Communicator

The config hot BU command configures the transmitter to automatically use sensor 2 as
the primary sensor if sensor 1 fails. With the Hot Backup feature enabled, the primary
variable (PV) must either be first good or sensor average. See Average temperature for
details on using the Hot Backup feature when PV is sensor average. Sensors 1 or 2 can be
mapped as the secondary variable (SV), tertiary variable (TV), or quaternary variable (QV).
In the event of a primary variable (Sensor 1) failure, the transmitter enters the Hot Backup
feature mode and sensor 2 becomes the PV. The 4–20 mA signal is not disrupted, and a
status is available to the control system through HART Protocol that sensor 1 has failed. An
LCD display, if attached, displays the failed sensor status.

While configured to the Hot Backup feature, if sensor 2 fails but sensor 1 is still operating
properly, the transmitter continues to report the PV 4–20 mA analog output signal, while
a status is available to the control system through HART Protocol that sensor 2 has failed.
In the Hot Backup feature mode, the transmitter will not revert back to sensor 1 to control
the 4–20 mA analog output, until the Hot Backup feature mode is reset by either re­enabling through HART Protocol or by briefly powering down the transmitter.

For information on using the Hot Backup feature in conjunction with the HART Tri-Loop
see Use with the HART Tri-Loop.

Problem
description:

2, 2, 4, 1, 3

The unexpected failure of a critical temperature measurement can
cause safety issues, environmental or regulatory concerns, and
process shutdowns.

Our solution:

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The Hot Backup feature allows the transmitter to automatically
switch the transmitter input from the primary sensor to the
secondary sensor should the primary sensor fail. This prevents a
process disruption due to the failure of the primary sensor. A
maintenance alert is also generated to notify operators that a sensor
has failed and the Hot Backup feature is active.

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How it works:

Take away:

Target
applications:

Two sensors are wired to a dual-input transmitter. The two sensors
are measured in alternating fashion, so when sensor 1 failure is
detected, the transmitter can immediately switch the output to
reflect the sensor 2 value. The switch is automatic with no disruption
to the analog output. The transmitter sends a digital alert to inform
the users that the Hot Backup feature is active and the primary sensor
needs investigation.

“The Hot Backup feature prevents primary sensor failure from
disrupting process control.”

Redundant measurements, critical measurements, trouble spots.

Configure Hot Backup in guided setup

Enable Hot Backup in guided setup: Fast Keys 2-1-5

Procedure

1. From the Home Screen, select 2 Configure.

2. Select 1 Guided Setup.

3. Select 5 Config Hot Backup.

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4. When prompted, select 1 Yes to disable Hot Backup. To reconfigure Hot Backup,

select 2 No.

5. When prompted, choose which variable you would like as your primary variable (PV)

and select ENTER. With Hot Backup disabled, the PV may be Sensor 1 Temperature,

Sensor 2 Temperature, Differential Temperature, Average Temperature, or First Good
Temperature.

Disable Hot Backup in guided setup: Fast Keys 2-1-5

Procedure

1. From the Home Screen, select 2 Configure.

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2. Select 1 Guided Setup.

3. Select 5 Config Hot Backup.

4. When prompted, select 1 Yes to disable Hot Backup. To reconfigure Hot Backup,

select 2 No.

5. When prompted, choose which variable you would like as your primary variable (PV)

and select ENTER. With Hot Backup disabled, the PV may be Sensor 1 Temperature,

Sensor 2 Temperature, Differential Temperature, Average Temperature, or First Good
Temperature.

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Configure Hot Backup in manual set up

Enabling Hot Backup in manual setup: Fast Keys 2-2-4-1-3

Procedure

1. From the Home Screen, select 2 Configure.

2. Select 2 Manual Setup.

3. Select 4 Diagnostics.

4. Select 1 Hot Backup.

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5. Select 3 Config Hot Backup.

6. When prompted, select 1 Yes to enable Hot Backup. To exit, select 2 No.

7. When prompted, choose which variable you would like as your primary variable (PV)

and select ENTER. With Hot Backup enabled, the PV must either be First Good
Temperature or Average Temperature.

Disabling Hot Backup in manual setup: Fast Keys 2-2-4-1-3

Procedure

1. From the Home Screen, select 2 Configure.

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2. Select 2 Manual Setup.

3. Select 4 Diagnostics.

4. Select 1 Hot Backup.

5. Select 3 Config Hot Backup.

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6. When prompted, select 1 Yes to disable Hot Backup. To reconfigure Hot Backup,

select 2 No.

7. When prompted, choose which variable you would like as your primary variable (PV)

and select ENTER. With Hot Backup disabled, the PV may be Sensor 1 Temperature,

Sensor 2 Temperature, Differential Temperature, Average Temperature, or First Good
Temperature.

Verify Hot Backup is enabled: Fast Keys 2-2-4-1

Procedure

1. From the Home Screen, select 2 Configure.

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2. Select 2 Manual Setup.

3. Select 4 Diagnostics.

4. Select 1 Hot Backup.

5. You will see this screen. Under 1 Mode, it will say either Enabled or Disabled, as well

as indicate what your primary variable is.

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Alerts configuration for Hot Backup

Alerts for Hot Backup when configured with first good temperature

Primary sensor failure

Communicator message

If your primary sensor fails, the second sensor immediately takes over. The transmitter will
report a failed device status, indicating Sensor 1 is open and Hot Backup is active. This is
shown in the Field Communicator in the Overview section.

Select 1 Device Status to view the active alerts.

After the sensor has been repaired or replaced, the Field Communicator will display a
maintenance device status, indicating Hot Backup is still active. This is shown in the Field
Communicator in the Overview section.

Select 1 Device Status to view the active alerts. Hot Backup is still active even though
sensor 1 is repaired.

It is recommended Hot Backup be reset immediately after repairing or replacing the
affected sensor. See Reset Hot Backup: Fast Keys 2-2-4-1-4. After resetting Hot Backup,
the Field Communicator will display an Advisory Device Status, indicating that the
configuration has changed. This is shown in the Overview section. To clear this advisory,
clear the configuration changed flag, as shown below:

1. Select 1 Device Status to view the active alerts.

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2. Select 2 A: Configuration Changed.

3. Select 2 Clear Config Changed Flag.

LCD display message

The LCD display on the transmitter will display a message HOT BU SNSR 1 FAIL as well as
the output of the secondary sensor that has taken over the process.

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After the sensor has been repaired or replaced, the LCD display on the transmitter will
display a message WARN HOT BU as well as the output of the secondary sensor that has
taken over the process.

It is recommended that Hot Backup be reset immediately after repairing or replacing the
affected sensor. See Reset Hot Backup: Fast Keys 2-2-4-1-4. After repairing or replacing
the bad sensor, the LCD display on the transmitter will now display the value of Sensor 1.

DeltaV™ message

Alarms will show up on the bottom toolbar, as shown below:

To view the alarm, simply click on the device on the toolbar. A faceplate with further
information on the active alarms will appear. It will show an ADVISE Sensor Summary, a
FAILED Sensor 1 Open, and a MAINTENANCE Hot Backup Active.

Note

For all of these alarms to appear in DeltaV, all alarms in DeltaV must be configured to
WARNING status.

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After the sensor has been repaired or replaced, the Faceplate window in DeltaV will display
boxes next to each alarm that has been addressed. You must acknowledge each alarm to
clear it by checking the ACK box to the left of the alarm.

It is recommended Hot Backup be reset immediately after repairing or replacing the
affected sensor. See “Reset Hot Backup: Fast Keys 2-2-4-1-4” on page 76. After resetting
Hot Backup, the DeltaV Faceplate window indicates the alarms ADVISE Configuration
Change and MAINTENANCE Hot Backup Active. You must acknowledge these alarms in order
to clear them by checking the ACK boxes next to each alarm.

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Yokogawa’s Centum PRM/DTM™ messages

When the primary sensor fails, alarms will be displayed in the Plant Resource Manager
(PRM) via yellow circles next to the device, as shown below. These yellow circles indicate
that something in your process needs attention. To investigate this further, right click on
the affected device, and select DTM Works… This will open the Device Task Manager
(DTM).

In the DTM, the device status will indicate a Failed status in the Process Variable Overview
section, shown below:

To investigate why the device displays a Failed status, Select Troubleshoot in the red
device status box. Another screen will display the active alerts indicating FAILED Sensor 1

Open, and MAINTENANCE Hot Backup Active, as shown below:

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After the sensor has been repaired or replaced, the device status in the Process Variable
Overview section of the DTM will change from Failed to Maintenance.

Investigate this Maintenance alert by selecting Troubleshoot in the yellow device status
box. Another screen will display the active alerts, indicating MAINTENANCE Hot Backup
Active, as shown below:

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It is recommended that Hot Backup be reset immediately after repairing or replacing the
affected sensor. See Reset Hot Backup: Fast Keys 2-2-4-1-4 with a Field Communicator or
reset it directly in the DTM by going to the Diagnostics tab of the Manual Setup section
and selecting Reset Hot Backup, as shown below:

After resetting Hot Backup, the device status in the Process Variable Overview section of
the DTM will change from Maintenance to Advisory, as shown below:

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Investigate this advisory alert by clicking Investigate in the blue device status box. Another
screen will display the active alerts, indicating ADVISORY Configuration Changed, as
shown below. To clear this advisory, Select Clear Config Changed Flag and follow the
steps.

When all of the alerts for this device have been addressed, the yellow circles in the PRM
change to green, indicating that everything is operating correctly.

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Secondary sensor failure

Communicator message

If Hot Backup is enabled and your secondary sensor fails, your transmitter will report a
Failed device status. The alerts show that Sensor 2 is open, but Hot Backup is not active, as
shown below on the Field Communicator in the Overview section:

Select 1 Device Status to view the active alerts.

After the sensor has been repaired or replaced, the Field Communicator will display a
Good Device Status, indicating the problem is solved.

LCD display message

The LCD display on the transmitter will display a message WARN SNSR 2 FAIL. It will also
continue to display the output of your primary sensor:

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After the sensor has been repaired or replaced, the LCD display warning message will clear
and display the output of the primary variable.

DeltaV message

Alarms will show up on the bottom toolbar, as shown below:

To view the alarm, simply click on the device on the toolbar. A Faceplate with further
information on the active alarms will appear. It will show an ADVISE Sensor Summary,
FAILED Sensor 2 Open, and MAINTENANCE Hot Backup Active.

Note

For all of these alarms to appear in DeltaV, all alarms in DeltaV must be configured to
WARNING status.

After the sensor has been repaired or replaced, the faceplate in DeltaV will display boxes
next to the alarms, shown below. You must acknowledge these alarms by clicking on the
boxes in order to clear them.

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Yokogawa’s Centum PRM/DTM messages

When the secondary sensor fails, alarms will be displayed in the PRM via yellow circles next
to the device, as shown below. These yellow circles indicate that something in your
process needs attention. To investigate this further, right click on the affected device, and
select DTM Works… This will open the DTM.

In the DTM, the device status will indicate a Failed status in the Process Variable Overview
section, shown below:

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To investigate why the device displays a Failed status, select Troubleshoot in the red
device status box. Another screen will display the active alerts indicating FAILED Sensor 2
Open, as shown below:

After the sensor has been repaired or replaced, the alerts will clear, and the yellow circles
in the PRM change to green, indicating that everything is operating correctly. Hot Backup
does not need to be reset in this case.

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Alerts for Hot Backup when configured with average temperature

Primary sensor failure

Communicator message

If your primary sensor fails, there will be a seamless transition where the second sensor
immediately takes over the process. The transmitter will report a Failed status, indicating
Sensor 1 is open and Hot Backup is active. This alert is shown on the Field Communicator
in the Overview section.

Select 1 Device Status to view the active alerts.

After the sensor has been repaired or replaced, the Field Communicator will display a
Maintenance Device Status, indicating Hot Backup is still active. This is shown on the Field
Communicator in the Overview section.

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Hot Backup is still active even though Sensor 1 is repaired. Hot Backup is still active even
though Sensor 1 is repaired.

It is recommended that Hot Backup be reset immediately after repairing or replacing the
affected sensor. See Reset Hot Backup: Fast Keys 2-2-4-1-4. After resetting Hot Backup,
the Field Communicator will display an Advisory Device Status, indicating that the
configuration has changed. This is shown in the Overview section. To clear this advisory,
simply clear the configuration changed flag, as shown below:

1. Select 1 Device Status to view the active alerts.

2. Select 2 A: Configuration Changed.

3. Select 2 Clear Config Changed Flag.

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LCD display message

The LCD display on the transmitter will display a message HOT BU SNSR 1 FAIL; WARN AV
DEGRA as well as the output of the average temperature. Because Sensor 1 has failed, this
average temperature output is the value of Sensor 2 only.

After the sensor has been repaired or replaced, the LCD display on the transmitter will
display a message WARN HOT BU, reminding you that Hot Backup is still active, as well as
the normal output of the average temperature. The warning message will clear after you
have reset Hot Backup. It is recommended that Hot Backup be reset immediately after
repairing or replacing the damaged sensor. See Reset Hot Backup: Fast Keys 2-2-4-1-4.

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DeltaV message

Alarms will show up on the bottom toolbar, as shown below:

To view the alarm, simply click on the device on the toolbar. A faceplate with further
information on the active alarms will appear. It will show an ADVISE Sensor Summary, a
FAILED Sensor 1 Open, and a MAINTENANCE Hot Backup Active.

Note

For all of these alarms to appear in DeltaV, all alarms in DeltaV must be configured to
WARNING status.

After the sensor has been repaired or replaced, the faceplate window in DeltaV will display
boxes next to each alarm that has been addressed. You must acknowledge each alarm to
clear it by checking the ACK box to the left of the alarm.

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It is recommended that Hot Backup be reset immediately after repairing or replacing the
affected sensor. See Reset Hot Backup: Fast Keys 2-2-4-1-4. After resetting Hot Backup,
the DeltaV Faceplate window indicates the alarms ADVISE Configuration Change and
MAINTENANCE Hot Backup Active. You must acknowledge these alarms in order to clear
them by checking the ACK boxes next to each alarm.

Yokogawa’s Centum PRM/DTM messages

When the primary sensor fails, alarms will be displayed in the PRM via yellow circles next to
the device, as shown below. These yellow circles indicate that something in your process
needs attention. To investigate this further, right click on the affected device, and select
DTM Works… This will open the DTM.

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In the DTM, the device status will indicate a Failed status in the Process Variable Overview
section, shown below:

To investigate why the device displays a Failed status, select Troubleshoot in the red
device status box. Another screen will display the active alerts indicating FAILED Sensor 1
Open, and MAINTENANCE Hot Backup Active, as shown below:

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After the sensor has been repaired or replaced, the device status in the Process Variable
Overview section of the DTM will change from Failed to Maintenance.

Investigate this Maintenance alert by selecting Troubleshoot in the yellow device status
box. Another screen will display the active alerts, indicating MAINTENANCE Hot Backup
Active, as shown below:

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It is recommended that Hot Backup be reset immediately after repairing or replacing the
affected sensor. See Reset Hot Backup: Fast Keys 2-2-4-1-4 with a Field Communicator or
reset it directly in the DTM by going to the Diagnostics tab of the Manual Setup section
and selecting Reset Hot Backup, as shown below:

After resetting Hot Backup, the device status in the Process Variable Overview section of
the DTM will change from Maintenance to Advisory, as shown below:

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Investigate this advisory alert by choosing Investigate in the blue device status box.
Another screen will display the active alerts, indicating ADVISORY Configuration Changed,
as shown below. To clear this advisory, select Clear Config Changed Flag and follow the
steps.

When all of the alerts for this device have been addressed, the yellow circles in the PRM
change to green, indicating that everything is operating correctly.

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Secondary sensor failure

Communicator message

If Hot Backup is enabled and your secondary sensor fails, your transmitter will report a
Failed device status. The alerts show that Sensor 2 is open, but Hot Backup is not active, as
shown below on the Field Communicator in the Overview section:

Select 1 Device Status to view the active alerts.

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After the sensor has been repaired or replaced, the Field Communicator will display a
Good Device Status, indicating the problem is solved.

LCD display message

The LCD display on the transmitter will display a message WARN SNSR 2 FAIL; WARN AV
DEGRA as well as the output of the average temperature. Because Sensor 2 has failed, this
average temperature output is the value of Sensor 1 only.

After the sensor has been repaired or replaced, the LCD display warning message will clear
and display the output of the primary variable.

DeltaV message

Alarms will show up on the bottom toolbar, as shown below:

To view the alarm, simply click on the device on the toolbar. A faceplate with further
information on the active alarms will appear. It will show an ADVISE Sensor Summary, and a
FAILED Sensor 2 Open.

Note

For all of these alarms to appear in DeltaV, all alarms in DeltaV must be configured to
WARNING status.

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After the sensor has been repaired or replaced, the faceplate in DeltaV will display boxes
next to the alarms, shown below. You must acknowledge these alarms by clicking on the
boxes in order to clear them.

Yokogawa’s Centum PRM/DTM messages

When the secondary sensor fails, alarms will be displayed in the PRM via yellow circles next
to the device, as shown below. These yellow circles indicate that something in your
process needs attention. To investigate this further, right click on the affected device, and
select DTM Works… This will open the DTM.

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In the DTM, the device status will indicate a Failed status in the Process Variable Overview
section, shown below:

To investigate why the device displays a Failed status, select Troubleshoot in the red
device status box. Another screen will display the active alerts indicating FAILED Sensor 2
Open, as shown below:

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After the sensor has been repaired or replaced, the alerts will clear, and the yellow circles
in the PRM change to green, indicating that everything is good. Hot Backup does not need
to be reset in this case.

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Reset Hot Backup: Fast Keys 2-2-4-1-4

When the Primary Variable is set to First Good Temperature, the secondary sensor will
remain on the 4–20 mA output until Hot Backup is reset, even after Sensor 1 has been
replaced. Because of this, it is recommended to reset Hot Backup immediately after
Sensor 1 is replaced. If Hot Backup is not reset and Sensor 2 fails, the transmitter will go
into alarm. It will not transfer back to Sensor 1 even if sensor one has been repaired.

When the Primary Variable is set to Average Temperature, it is also recommended to reset
Hot Backup immediately after Sensor 1 is replaced in order to clear the Hot Backup Active
alarm. However, with the PV set to Average Temperature, if Hot Backup is not reset and
Sensor 2 fails, the transmitter will simply switch to output the average of only Sensor 1.

1. From the Home screen, select 2 Configure.

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2. Select 2 Manual Setup.

3. Select 4 Diagnostics.

4. Select 1 Hot Backup.

5. Select 4 Reset Hot Backup.

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6. Hot Backup has been reset. Select OK.

Sensor Drift Alert configuration

HART 5 Fast Keys

HART 7 Fast Keys 2, 2, 4, 2

Field Communicator

The sensor drift alert command allows the transmitter to set a warning flag (through HART
Protocol), or go into analog alarm when the temperature difference between Sensor 1 and
Sensor 2 exceeds a user-defined limit. This feature is useful when measuring the same
process temperature with two sensors, ideally when using a dual-element sensor. When
sensor drift alert mode is enabled, the user sets the maximum allowable difference, in
engineering units, between Sensor 1 and Sensor 2. If this maximum difference is
exceeded, a sensor drift alert warning flag will be set.

When configuring the transmitter for sensor drift alert, the user also has the option of
specifying that the analog output of the transmitter go into alarm when sensor drifting is
detected.

Note

Using dual sensor configuration in the transmitter supports the configuration and
simultaneous use of the Hot Backup feature and sensor drift alert. If one sensor fails, the
transmitter switches output to use the remaining good sensor. Should the difference
between the two sensor readings exceed the configured threshold, the AO will go to alarm
indicating the sensor drift condition. The combination of sensor drift alert and the Hot
Backup feature improves sensor diagnostic coverage while maintaining a high level of
availability. Refer to the Rosemount 3144P FMEDA report for the impact on safety.

2, 2, 4, 2

Problem
description:

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Sensors often drift before they fail. This causes issues because during
the drift period, the sensor is not reporting as accurate measurement.

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In control loops, and especially safety loops this can lead to improper
process control and potential safety hazards.

Our solution:

How it works:

Take away:

Target
applications:

Note

Enabling drift alert option warning only will set a flag (through HART Protocol) whenever
the maximum acceptable difference between Sensor 1 and Sensor 2 has been exceeded.
For the transmitter’s analog signal to go into alarm when drift alert is detected, select
Alarm in Alarm switch (HART Protocol).

The sensor drift alert continuously monitors two sensor readings to
detect a drifting sensor. The diagnostic monitors the difference
between the two sensors, and when the difference becomes greater
than a value entered by the user, the transmitter sends an alert to
indicate a sensor drift condition.

Two sensors are connected to a dual-input transmitter where the
difference in sensor readings is continuously being measured. A
threshold is set by the user to determine when an excessive drift (i.e. a
significant delta) occurs between the two sensors. The temperature
delta between the two sensors is calculated by taking the absolute
value of the difference between Sensor 1 and Sensor 2. The user
configures the transmitter to send a digital alert or analog alarm when
the alert has been triggered. The Sensor Drift Alert does not indicate
which sensor is failing. Rather the diagnostic provides an indication of
a sensor drifting. The user should view the individual sensor output
trends on the host to determine which sensor is drifting.

“Sensor Drift Alert detects a degrading sensor.”

Redundant measurements, critical measurements, severe
applications.

Configure Sensor Drift in guided setup

Enable Sensor Drift Alert in guided setup: Fast Keys 2-1-6

Procedure

1. From the Home Screen, select 2 Configure.

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2. Select 1 Guided Setup.

3. Select 6 Config Drift Alert.

4. Select 1 Enable to activate Sensor Drift Alert and select ENTER.

5. When prompted, select whether you want Sensor Drift Alert to put the transmitter

into “Alarm” or “Warning”, and select ENTER. Enabling drift alert option warning
only will set a flag (through HART Protocol) whenever the maximum acceptable
difference between Sensor 1 and Sensor 2 has been exceeded. Enabling drift alert
option alarm will send the transmitter's analog signal into alarm when drift alert is
detected.

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6. Select the engineering units you would like to use and select ENTER. Select from

degC, degF, degR, Kelvin, mV, Ohms.

7. Enter the sensor drift Alert threshold value and select ENTER. This is a digital value

that triggers the drift alert feature. When this limit is exceeded, the transmitter will
go into alarm or generate a warning (depending on the alert mode chosen
previously).

8. Enter a damping value between 0 and 32 and select ENTER. This damping value is

additional damping applied to the result of (S1–S2) after each sensor's individual
damping value has already been applied.

9. Configuration is complete. Select OK.

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Disable Sensor Drift Alert in guided setup: Fast Keys 2-1-6

Procedure

1. From the Home Screen, select 2 Configure.

2. Select 1 Guided Setup.

3. Select 6 Config Drift Alert.

4. Select 2 Disable to disable Sensor Drift alert and select ENTER.

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5. Sensor Drift Alert has been disabled. Select OK.

Configure Sensor Drift in manual setup

Enable Sensor Drift Alert in manual setup: Fast Keys 2-2-4-2-5

Procedure

1. From the Home screen, select 2 Configure.

2. Select 2 Manual Setup.

3. Select 4 Diagnostics.

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4. Select 2 Sensor Drift Alert.

5. Select 5 Config Drift Alert.

6. Select 1 Enable to activate Sensor Drift Alert and select ENTER.

7. When prompted, select whether you want Sensor Drift Alert to put the transmitter

into “Alarm” or “Warning”, and select ENTER. Enabling Drift Alert Option Warning
only will set a flag (through HART Protocol) whenever the maximum acceptable
difference between Sensor 1 and Sensor 2 has been exceeded. Enabling Drift Alert
Option Alarm will send the transmitter's analog signal into alarm when Drift Alert is
detected.

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8. Select the engineering units you would like to use and select ENTER. Choose from

degC, degF, degR, Kelvin, mV, Ohms.

9. Enter the Sensor Drift Alert threshold value and select ENTER. This is a digital value

that triggers the Drift Alert feature. When this limit is exceeded, the transmitter will
go into alarm or generate a warning (depending on the alert mode chosen
previously).

10. Enter a damping value between 0 and 32 and select ENTER. This damping value is
additional damping applied to the result of (S1–S2) after each sensor's individual
damping value has already been applied.

11. Configuration is complete. Select OK.

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Disable Sensor Drift Alert in manual setup: Fast Keys 2-2-4-2-5

Procedure

1. From the Home Screen, select 2 Configure.

2. Select 2 Manual Setup.

3. Select 4 Diagnostics.

4. Select 1 Hot Backup.

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5. Select 3 Config Hot Backup.

6. Select 2 Disable to disable Sensor Drift alert and select ENTER.

7. Sensor Drift Alert has been disabled. Select OK.

Verify Sensor Drift Alert is enabled: Fast Keys 2-2-4-2

Procedure

1. From the Home Screen, select 2 Configure.

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2. Select 2 Manual Setup.

3. Select 4 Diagnostics.

4. Select 2 Sensor Drift Alert.

5. You will see this screen. Under 1 Mode, it will say either Alarm or Warning if
enabled, or Disable. If enabled, it will also display the current diagnostic values.

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Active Sensor Drift Alerts

Viewing active sensor drift alerts: Fast Keys 1-1-2

When the Sensor Drift Alert diagnostic detects a drifting sensor, the LCD display will
display a message; “ALARM DRIFT ALERT” if configured in Alarm Mode and “WARN DRIFT
ALERT” if configured in Warning Mode.

Procedure

1. Select 1 Overview.

2. If Sensor Drift Alert is configured in Alarm Mode, select 1 Device Status: Failed.

If Sensor Drift Alert is configured in Warning Mode, select 1 Device Status:
Maintenance.

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3. Select 2 Sensor Drift Alert Active.

Resetting active sensor drift alerts: Fast Keys 1-1-1

Procedure

1. Select 1 Overview.

2. Select 1 Device Status: (Maintenance or Failed).

3. Select 1 Refresh Alerts.

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3.8 Rosemount X-well Technology configuration

Rosemount X-well functionality can easily be enabled and configured via a field
communicator or asset management system. The Rosemount 3144P Temperature
Transmitter can be ordered with Rosemount X-well technology via the “PT” model option
code. The”C1” model option code must be ordered if the “PT” option code is specified.
The “C1’ option code requires user supplied information of process pipe material and pipe
schedule. Rosemount X-well technology can be configured with any asset management
software that supports Electronic Device Description Language (EDDL). The Device
Dashboard interface with DD revision 3144P Dev. 7 Rev. 1 or higher is required to view
Rosemount X-well functionality. The “Rosemount X-well Process” sensor/type option
should be selected as the sensor type in most cases. Once selected, pipe material, line size,
and pipe schedule information is required when configuring Rosemount X-well
technology. This section is referring to the process pipe properties that Rosemount 3144P
and 0085 Pipe Clamp Sensor with Rosemount X-well technology is going to be installed in.
This information is required for the in-transmitter algorithm to accurately calculate
process temperature. In the rare case that the process pipe is not available, a custom value
for the pipe conduction coefficient can be entered. This field becomes available when the
“Rosemount X-well Custom” sensor/type option is selected.

3.8.1

Configure Rosemount X-well technology with a Field Communicator

Procedure

1. From the Home screen, select 2: Configure.

2. Select 1: Guided Setup.

3. Select 1: Configure Sensor.

4. Select 1: Configure Sensor Type and Units.

5. Select either Rosemount X-well Process or Rosemount X-well Custom.

6. Select desired configurations and select Enter.

Configure Rosemount X-well Technology in manual setup: Fast Keys 2-2-1-11

Procedure

1. Under Configure Sensors, select Rosemount X-well Process sensor type.

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2. Select pipe material.

3. Select line size.

4. Select pipe schedule.

5. If process Pipe Material, Line Size, or Pipe Schedule is not available under Rosemount
X-well Process selection, select Rosemount X-well Custom sensor type.

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