Rosemount 3144 User manual

00809-0100-4724
English
Rev. CA
Model 3144 and 3244MV
Smart Temperature
Transmitters

Product
Manual
Model 3144 and 3244MV Smart
Temperature Transmitters
Model 3144 and 3244MV Revision: 5.2.1
HART Communicator Field Device Revision: Dev. v2, DD v1
Rosemount Models 3144 and 3244MV Smart Temperature Transmitters may be protected by one or more
U.S. Patents Pending. Other foreign patents pending.
Rosemount, the Rosemount logotype, SMART FAMILY, Hot Backup, and Tri-Loop are registered
trademarks of Rosemount Inc.
Teflon is a registered trademark of E.I. du Pont de Nemours & Co.
HART is a registered trademark of the HART Communication Foundation.
Minigrabber is a trademark of Pomona Electronics.
Inconel is a registered trademark of International Nickel Co.
COVER PHOTO: 3144-010AC
NOTICE
Read this manual before working with the product. For personal and system safety, and
for optimum product performance, make sure you thoroughly understand the contents
before installing, using, or maintaining this product.
Within the United States, Rosemount Inc. 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 CST)
North American Response Center
Equipment service needs.
1-800-654-7768 (24 hours—includes Canada)
Outside of the United States, contact your local Rosemount representative.
The products described in this document are NOT designed for nuclear-qualified
applications. Using non-nuclear qualified products in applications that require nuclear-
qualified hardware or products may cause inaccurate readings.
For information on Rosemount nuclear-qualified products, contact your local Rosemount
Sales Representative.
Fisher-Rosemount satisfies all obligations coming from legislation
to harmonise product requirements in the European Union.
Rosemount Inc.
8200 Market Boulevard
Chanhassen, MN 55317 USA
Tel [phone]
Telex 4310012
Fax [phone]
00809-0100-4724
© Rosemount Inc. 1999
http://www.rosemount.com

v
Table of Contents
SECTION 1
Introduction UsingthisManual..................................1-1 Getting Acquainted with the Transmitter ................1-2
Software Compatibility..............................1-2
SECTION 2
Installation Overview.........................................2-1 SafetyMessages...................................2-1
Warnings......................................2-1
Commissioning: On the Bench or in the Loop ............2-2
GeneralConsiderations..............................2-3
ElectricalConsiderations............................2-3
Power Supply...................................2-3
FieldWiring....................................2-4
Power/CurrentLoopConnections...................2-4
Grounding .....................................2-5
Surges/Transients................................2-6
Multichannel Installations .........................2-6
FailureModeandSecurityJumpers....................2-7
FailureModeJumper.............................2-7
TransmitterSecurityJumper.......................2-7
Changing the Position of the Failure Mode or
SecurityJumper.................................2-7
SensorConnections.................................2-8
RTD or Ohm Inputs ..............................2-8
Thermocouple or Millivolt Inputs ...................2-8
MechanicalConsiderations...........................2-9
Mounting......................................2-9
AccessRequirements.............................2-9
EnvironmentalConsiderations........................2-11
TemperatureEffects..............................2-11
MoistorCorrosiveEnvironments...................2-12
Hazardous Locations Installations ...................2-13
InstallationProcedure...............................2-13
TypicalNorthAmericanConfiguration...............2-13
TypicalEuropeanConfiguration....................2-15
Installation in Conjunction with a Model 333
HART Tri-Loop HART-to-Analog Signal Converter ......2-16
Commissioning the Transmitter for Use with the
HARTTri-Loop...................................2-17

Rosemount Model 3144 and 3244MV Smart Temperature Transmitters
vi
SECTION 3
On-line Operations Overview.........................................3-1 SafetyMessages...................................3-1
Warnings......................................3-1
Setting the Loop to Manual ........................3-2
ReviewConfigurationData ..........................3-2
Review........................................3-2
CheckOutput.....................................3-2
ProcessVariables................................3-2
BasicSetup.......................................3-5
SelectSensorType...............................3-5
SetOutputUnits.................................3-5
Rerange .......................................3-6
DetailedSetup.....................................3-6
50/60HzFilter..................................3-6
TerminalTemperatureSettings.....................3-6
Signal Condition ................................3-6
AnalogOutput..................................3-6
DisableSpecialSensor............................3-6
HARTOutput...................................3-6
MeterSettings ..................................3-6
AlarmValues...................................3-7
ProcessVariableDamping.........................3-7
DifferentialTemperature..........................3-8
AverageTemperature.............................3-9
HotBackup ....................................3-10
DriftAlert......................................3-11
InformationVariables...............................3-13
Tag...........................................3-13
Descriptor......................................3-13
Message.......................................3-13
Date..........................................3-13
Sensor1SerialNumber...........................3-13
Sensor2SerialNumber...........................3-13
Diagnostics and Service .............................3-14
TestDevice ....................................3-14
LoopTest......................................3-14
SensorCurrent..................................3-15
Calibration .......................................3-15
DecidingWhichTrimProceduretoUse..............3-15
SensorTrim....................................3-16
Transmitter-SensorMatching ......................3-19
OutputTrim....................................3-20
ScaledOutputTrim..............................3-21
ApplyValues...................................3-21
Multidrop Communication.........................3-21

vii
Table of Contents
SECTION 4
Maintenance Overview.........................................4-1 SafetyMessages...................................4-1
Warning.......................................4-1
Hardware Diagnostics...............................4-2
HardwareMaintenance..............................4-3
TestTerminals..................................4-3
Sensor Checkout ................................4-3
DisassemblingtheElectronicsHousing...............4-4
AssemblingtheElectronicsHousing.................4-6
ReturnofMaterials.................................4-6
SECTION 5
Specifications and
Reference Data
Specifications.....................................5-1
FunctionalSpecifications..........................5-1
PerformanceSpecifications........................5-6
PhysicalSpecifications ...........................5-7
TransmitterDimensionalDrawings....................5-8
ReferenceData....................................5-10
OrderingInformation...............................5-12
PartsList.........................................5-14
Intermittent Sensor Algorithm ........................5-14
Intermittent Sensor Detect (Advanced Function) .......5-18
SECTION 6
Options Overview.........................................6-1 SafetyMessages...................................6-1
Warnings......................................6-1
Custom Transmitter Configuration (Option Code C1) . . . 6-1
Trim to Specific Rosemount RTD Calibration Schedule
(Transmitter-Sensor Matching) (Option Code C2) ......6-1
Five-PointCalibration(OptionCodeC4).............6-1
CalibrationCertificate(OptionCodeQ4).............6-2
TrimtoSpecialSensor(OptionCodeC7).............6-2
MountingBrackets(OptionCodesB4andB5).........6-2
AssemblyOptions(OptionCodeX1,X2,andX3)......6-3
External Ground Lug Assembly (Option Code G1) .....6-3
50HzLineVoltageFilter(OptionCodeF5)...........6-3
NAMUR Compliant Operation
(OptionCodesA1andCN)........................6-3
TransientProtection(OptionCodeT1)...............6-4
HotBackup(OptionCodeU1) .....................6-4
Average Temperature with Hot Backup and Drift Alert
(OptionCodeU2)................................6-5
TwoIndependentSensors(OptionCodeU4)..........6-5
DifferentialTemperature(OptionCodeU5)...........6-5
AverageTemperature(OptionCodeU6)..............6-5
LCDMeter(OptionCodeM5)........................6-6
Installing the Meter ..............................6-7
Diagnostic Messages .............................6-8

Rosemount Model 3144 and 3244MV Smart Temperature Transmitters
viii
APPENDIX A
Transmitter Improvements Overview.........................................A-1 RevisionDifferencesSummary.......................A-1
APPENDIX B
Model 275
HART Communicator
Overview.........................................B-1
SafetyMessages...................................B-2
Warnings......................................B-2
Model 3144 and 3244MV Menu Trees..................B-2
Connections and Hardware...........................B-4
CommunicatorKeys................................B-6
Fast-KeySequences..............................B-8
MenusandFunctions...............................B-8
MainMenu.....................................B-8
OnlineMenu ...................................B-9
Diagnostic Messages .............................B-9
APPENDIX C
Model 268
SMART FAMILY Interface
Overview.........................................C-1
SafetyMessages...................................C-1
Warnings......................................C-1
3144/3244MV ..................................C-2
Connections and Hardware...........................C-3
BasicFeatures.....................................C-3
DedicatedKeys.................................C-3
AlphanumericandShiftKeys......................C-4
FunctionKeys ..................................C-5
FunctionKeySequences..........................C-5
Diagnostics Messages ............................C-6
APPENDIX D
Hazardous Area Approval
Installation Drawings
Overview.........................................D-1
GLOSSARY Glossary.........................................G-1
INDEX Index............................................I-1

Section
1-1
1Introduction
USING THIS MANUAL This manual is intended to assist in installing, operating, and
maintaining Rosemount Model 3144 and 3244MV Smart Temperature
Transmitters.
Section 2: Installation
Section 2 explains how to commission transmitters; provides an
installation flowchart; and describes electrical, mechanical, and
environmental installation considerations.
Section 3: On-line Operations
Section 3 describes how to configure transmitter software, select a
sensor type, adjust the input and output electronics; and how to change
output characteristics (range settings, output type, damping, and units)
and non-output-related transmitter characteristics (including the
transmitter tag number, date, and message).
Section 4: Maintenance
Section 4 describes hardware diagnostics, maintenance tasks, and
hardware troubleshooting.
Section 5: Specifications and Reference Data
Section 5 lists functional, performance, and physical specification data
for the transmitter. This section also includes transmitter drawings,
ordering information, and a list of spare parts.
Section 6: Options
Section 6 presents options including the LCD meter, mounting
brackets, custom configuration and calibration, trim to special sensor,
and external ground-lug assembly.
Appendix A: Transmitter Improvements
Appendix A describes the enhancements that have been made to the
Model 3144 and 3244MV Smart Temperature Transmitters, and
includes a chart that compares previous transmitter versions to the
current improved transmitter version.
Appendix B: Model 275 HART®Communicator
Appendix B provides a complete menu tree, a table of fast key
sequences, and other information regarding use of the Model 275
HART®Communicator.
Appendix C: Model 268 SMART FAMILY®Interface
Appendix C provides a complete menu tree and other information
regarding use of the Model 268 SMART FAMILY®Interface.
Appendix D: Hazardous Area Approval Installation Drawings
Appendix D provides hazardous location installation drawings.

Rosemount Model 3144 and 3244MV Smart Temperature Transmitters
1-2
GETTING ACQUAINTED
WITH THE TRANSMITTER The Rosemount Model 3144 and 3244MV Smart Temperature
Transmitters are microprocessor-based instruments that accept input
from a wide variety of sensors, and transmit temperature data to a
control system or transmitter interface. The transmitters combine
Rosemount reliability with the flexibility of digital electronics. The
transmitters are ideal for applications that require high performance or
remote communication.
Each transmitter is designed to communicate with a HART
communicator. Communicators are used to interrogate, configure, test,
or format the transmitter, as well as other products in the Rosemount
family of microprocessor-based instruments. Moreover, HART
communicators can communicate with a transmitter from the control
room, from the transmitter site, or from any other wiring termination
point in the loop where there is between 250 and 1100 ohms resistance
between the transmitter power connection and the power supply.
Special dual-sensor features of the Model 3244MV include Hot
Backup®, drift alert, differential and average temperature
measurements, and four simultaneous measurement variable outputs
in addition to the analog output signal.
SOFTWARE
COMPATIBILITY Software for Rosemount SMART FAMILY products is revised
periodically. Replacement transmitters may contain revised software
that is incompatible with the existing software in your HART
communicator.
Software loaded into the Model 275 HART Communicator that contains
device descriptors (DDs) compatible with the Model 3144 and 3244MV
transmitters can be included in the communicator initially, or entered
at any Rosemount Service Center upon request. Rerange and read-only
capabilities can be attained with revision 5.0 or later Model 268
communicator software. The HART Communicator Field Device
Revision Dev v2, DD v1 should be loaded into the Model 257 HART
Communicator in order to utilize all of the features available in the
Model 3144 and 3244MV. See Appendix B: Model 275 HART
Communicator for more information concerning device revisions.
Upgrading the Model 268 software to revision 7.0 will allow limited
functionality such as changing the sensor type and number of wires,
and performing trim functions. The Model 275 HART Communicator is
the necessary interface for complete functionality, and is recommended.
Contact the Rosemount Service Center nearest you to obtain the
appropriate HART communicator software.

Section
2-1
2Installation
OVERVIEW The information in this section includes transmitter installation
instructions, an installation flowchart (Figure 2-1 on page 2-2),
installation drawings, and special installation considerations.
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 ( ). Please refer to the following safety messages
before performing an operation preceded by this symbol.
Warnings
Explosions could result in death or serious injury:
• Do not remove the transmitter cover in explosive atmospheres when the circuit
is alive.
• Before connecting a HART communicator in an explosive atmosphere, make
sure the instruments in the loop are installed in accordance with intrinsically
safe or non-incendive field wiring practices.
• Verify that the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.
• Both transmitter covers must be fully engaged to meet explosion-proof
requirements.
Failure to follow these installation guidelines could result in death or serious
injury:
• Make sure only qualified personnel perform the installation.
Process leaks could result in death or serious injury:
• Install and tighten thermowells or sensors before applying pressure, or process
leakage may result.
• Do not remove the thermowell while in operation. Removing while in operation
may cause process fluid leaks.
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 the transmitter leads and terminals:
• Use extreme caution when making contact with the leads and terminals.

Rosemount Model 3144 and 3244MV Smart Temperature Transmitters
2-2
COMMISSIONING: ON THE
BENCH OR IN THE LOOP The transmitter may be commissioned before or after installation.
However, it may be useful to commission the transmitter on the bench
before installation to ensure proper operation and to familiarize
yourself with its functionality.
Figure 2-1. Installation Flowchart.
START
HERE
Set Units
Set Range
Values
Set Sensor
Type
Set Number
of Wires
Set Damping
Set Jumpers
or Switches
Mount the
Transmitter
Wire the
Transmitter
Power the
Transmitter
Check for
Process Leaks
DONE
Simulate
Sensor Input
No
Yes
No
Yes
Bench
Calibration?
BASIC SETUP VERIFY FIELD INSTALL
Within
Specifications?
Refer to
Section 4:
Maintenance

2-3
Installation
GENERAL
CONSIDERATIONS Electrical temperature sensors such as resistance temperature
detectors (RTDs) and thermocouples (T/Cs) produce low-level signals
proportional to temperature. The Model 3144 and 3244MV transmitters
convert low-level sensor signals to a standard 4–20 mA dc signal that is
relatively insensitive to lead length and electrical noise. This current
signal is then transmitted to the control room via two wires.
Figures 2-9 and 2-12 show recommended mounting configurations for
transmitters and sensor assemblies. Refer to Section 6: Options for
additional transmitter mounting accessories.
ELECTRICAL
CONSIDERATIONS Proper electrical installation is necessary to prevent errors due to
sensor lead resistance and electrical noise. Shielded cable should be
used for best results in electrically noisy environments. The current
loop must have between 250 and 1100 ohms in order to communicate
with a HART communicator. Refer to Figure 2-4 on page 2-5 for sensor
and current loop connections.
Power Supply To communicate with a transmitter, you will need a 17.75 V dc
minimum power supply. The power supplied to the transmitter should
not drop below the transmitter lift-off voltage (see Figure 2-2). If the
power drops below the lift-off voltage while the transmitter is being
configured, the transmitter may interpret the configuration
information incorrectly.
The dc power supply should provide power with less than 2% 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
Do not allow the voltage to drop below 12.0 V dc at the transmitter
terminals when changing transmitter configuration parameters, or
permanent damage to the transmitter could result.
Figure 2-2. Load Limits.
1322
1000
750
250
0
1012.0 20 30 40 42.4
Supply Voltage (V dc)
Maximum Load = 43.5 3(Supply Voltage – 12.0)
Operating
Region
4–20 mA dc
Load (Ohms)
500
1100

Rosemount Model 3144 and 3244MV Smart Temperature Transmitters
2-4
Field Wiring All 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
the best results. Do not run unshielded signal wiring in conduit or open
trays with power wiring, or near heavy electrical equipment. High
voltage may be present on the leads and may cause electrical shock.
To power the transmitter, follow the steps below.
1. Remove the transmitter covers. Do not remove the transmitter
covers in an explosive atmosphere when the circuit is alive.
2. Connect the positive power lead to the terminal marked “+” and
the negative power lead to the terminal marked “–” as shown in
Figure 2-3. When wiring to screw terminals, the use of crimped
lugs is recommended.
3. Tighten the terminal screws to ensure that good contact is made.
No additional power wiring is required.
4. Replace the transmitter covers. Both transmitter covers must be
fully engaged to meet explosion-proof requirements.
NOTE
Do not apply high voltage (e.g., ac line voltage) to the transmitter
terminals. Abnormally high voltage can damage the unit.
Figure 2-3. Transmitter Terminal Block.
Power/Current Loop
Connections Use ordinary copper wire of sufficient size to ensure that the voltage
across the transmitter power terminals does not go below 12.0 V dc.
1. Connect the current signal leads as shown in Figure 2-4.
2. Recheck the polarity and correctness of connections.
3. Turn the power ON.
For information about multichannel installations, refer to page 2-6. For
information about intrinsically safe installations, refer to page 2-13.
See “Safety Messages” on page 2-1 for complete warning information.
Negative Terminal
Positive Terminal
Test Terminal
Ground Terminal
Sensor Terminals
3144-0200E01D

2-5
Installation
NOTE
Do not connect the power/signal wiring to the test terminals.
The voltage present on the power/signal leads may burn out the
reverse-polarity protection diode that is built in to the test terminal. If
the test terminals’ reverse polarity protection diode is burned out by the
power/signal wiring, the transmitter can still be operated by jumping
the current from one test terminal to the other.
Figure 2-4. Connecting a
Communicator to a Transmitter Loop.
Grounding Transmitters are electrically isolated to 500 V ac rms. You can ground
the signal wiring at any single point, if desired. When using a grounded
thermocouple, the grounded junction serves as this point.
NOTE
Do not ground the signal wire at both ends.
Shielded Wire Recommended grounding techniques for shielded wire usually call for a
single grounding point for each shielded wire to avoid grounding the
loop. The following two examples employ the single point grounding
technique:
Example 1
Connect the shield for the signal wiring to the shield for the sensor
wiring. Make sure that the two shields are tied together and
electrically isolated from the transmitter housing. Ground the shield
at the power supply end.
Example 2
Connect the shield for the sensor wiring to the ground terminal
inside of the terminal compartment of the transmitter housing. The
shield for the signal wiring should be cut and isolated from the
transmitter housing. This shield should be grounded only at the
power supply end. Never connect the shield for the signal wiring to
the ground terminal inside the transmitter housing.
Power/Signal
Terminals
The signal loop may be grounded at any
point or left ungrounded.
Power
Supply
250 V ≤RL≤1100 V
A HART communicator may be
connected at any termination
point in the signal loop. The
signal loop must have between
250 and 1100 ohms load for
communications.
3144-0000A04A

Rosemount Model 3144 and 3244MV Smart Temperature Transmitters
2-6
Transmitter Housing Ground the transmitter housing in accordance with local 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 (see table on page 5-9). External grounding is
recommended when using the optional transient protector (Option
Code T1).
Surges/Transients The transmitter will withstand electrical transients of the energy level
usually encountered in static discharges or induced switching.
However, high-energy transients, such as those induced in wiring from
nearby lightning strikes, can damage both the transmitter and the
sensor.
To protect against high-energy transients, install either the integral
transient protection board (Option Code T1) or the Rosemount Model
470 Transient Protector. The integral transient protection board is
available as an ordered option or as an accessory. Refer to “Transient
Protection (Option Code T1)” on page 6-4 for more information. The
Model 470 transient protector is available only as an accessory. Refer to
the Model 470 Transient Protector Product Data Sheet (Rosemount
publication no. 00813-0100-4191) for more information.
Multichannel Installations You can connect several transmitters to a single master power supply,
as shown in Figure 2-5. 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
uninterruptible power supply or a back-up battery. The diodes shown in
Figure 2-5 prevent unwanted charging or discharging of the back-up
battery.
Figure 2-5. Multichannel Installations.
Transmitter
No. 1 Readout or
Controller No. 1
Transmitter
No. 2
Readout or
Controller No. 2
Battery
Backup
To Additional
Transmitters
dc
Power
Supply
3044-0131A
Between 250 and
1100 ΩIf No Load
Resistor
RLead
RLead
RLead

2-7
Installation
FAILURE MODE AND
SECURITY JUMPERS
Failure Mode Jumper The transmitter monitors itself during normal operation with an
automatic diagnostic routine. If the diagnostic routine detects a sensor
failure or a failure in the transmitter electronics, the transmitter goes
into alarm (high or low, depending on the position of the failure mode
jumper).
The analog alarm and saturation values that the transmitter uses
depend on whether it is factory configured to standard or
NAMUR-compliant operation. The values for each are as follows:
Failure Mode Jumper Locations Without a meter installed:
The failure mode jumper is located on the front side of the
electronics module on the electronics side of the transmitter
housing, and is labeled FAIL MODE (see Figure 2-6 on page 2-8).
With a meter installed:
The failure mode jumper is located on the LCD faceplate on the
electronics module side of the transmitter housing, and is labeled
FAIL MODE (see Figure 2-6 on page 2-8).
Transmitter Security
Jumper The transmitter is equipped with a write-protect jumper that can be
positioned to prevent the accidental or deliberate change of
configuration data. The security jumper is located on the front side of
the electronics module and is labeled XMTR SECURITY (see Figure 2-6
on page 2-8).
Changing the Position of
the Failure Mode or
Security Jumper
To change the position of the failure mode or security jumper, follow the
steps below.
1. If the transmitter is installed, set the loop to manual.
2. Remove the housing cover on the electronics side. Do not remove
the transmitter cover in explosive atmospheres when the circuit
is alive.
3. Set the jumper(s) to the desired position. See Figure 2-6 on
page 2-8.
4. Replace the transmitter cover. Both transmitter covers must be
fully engaged to meet explosion-proof requirements.
Standard Operation
Fail High 21.0 mA ≥I≥23.0 mA
High Saturation I ≥20.5 mA
Low Saturation I ≤3.90 mA
Fail Low I ≤3.75 mA
NAMUR-Compliant Operation
Fail High 21.0 mA ≥I≥23.0 mA
High Saturation I ≥20.5 mA
Low Saturation I ≤3.8 mA
Fail Low I ≤3.6 mA
See “Safety Messages” on page 2-1 for complete warning information.

Rosemount Model 3144 and 3244MV Smart Temperature Transmitters
2-8
Figure 2-6. Transmitter Jumper
Locations.
SENSOR CONNECTIONS Figure 2-7 on page 2-9 shows the correct input connections to the
sensor terminals on the transmitter. To ensure an adequate sensor
connection, anchor the sensor lead wires beneath the flat washer on the
terminal screw. Do not remove the transmitter cover in explosive
atmospheres when the circuit is alive. Both transmitter covers must be
fully engaged to meet explosion-proof requirements. Use extreme
caution when making contact with the leads and terminals.
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 10 ohms per lead (equivalent to 1,000 feet 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.
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.
NOTE
The use of two grounded thermocouples with a Model 3244MV
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.
Security Jumper
Failure Mode Jumper
(without a Meter Installed)
Failure Mode Jumper
(with a Meter Installed)
3144-0200G01A, 2352A01D
See “Safety Messages” on page 2-1 for complete warning information.

2-9
Installation
Figure 2-7. Sensor Wiring Diagram.
MECHANICAL
CONSIDERATIONS Use the following information when preparing the installation site and
selecting transmitter options.
The transmitter may be mounted directly to or remotely from the
sensor. Using optional mounting brackets, the transmitter may be
mounted to a flat surface or to a two-inch diameter pipe (see Figure 2-8
on page 2-10).
Mounting The transmitter may require supplementary support under
high-vibration conditions, particularly if used with extensive
thermowell lagging or long extension fittings. Pipe-stand mounting,
using one of the optional mounting brackets, is recommended for use in
high-vibration conditions.
Access Requirements Take into account the need for access to the transmitter when choosing
an installation location and position.
Housing Rotation You may rotate the electronics housing up to 90 degrees in either
direction to improve field access to the two compartments.
Terminal Side of Electronics
Housing Mount the transmitter so the terminal side is accessible. Be sure to
allow adequate clearance for cover removal. Make wiring connections
through the conduit openings on the bottom of the housing.
* Transmitter must be configured for a 3-wire RTD in order to recognize an RTD with a compensation loop.
** Rosemount provides 4-wire sensors for all single-element RTDs. You can use these RTDs in 3-wire configurations by leaving
the unneeded leads disconnected and insulated with electrical tape.
*** Typical wiring configuration of a Rosemount dual-element RTD is shown (R=Red, W=White, G=Green, B=Black).
Avg. Temp/DT/
Hot Backup/Dual Sensor with
2RTDs**
2-wire RTD
and Ohms** 3-wire RTD and Ohms** 4-wire RTD and Ohms T/Cs and Millivolts
MODEL 3144 SENSOR CONNECTIONS
MODEL 3244MV SENSOR CONNECTIONS
Avg. Temp/DT/
Hot Backup/Dual Sensor with
2 thermocouples
Avg. Temp/DT/
Hot Backup/Dual Sensor with
RTDs/thermocouples**
Avg. Temp/DT/
Hot Backup/Dual Sensor with
RTDs/thermocouples**
2-wire RTD
and Ohms** 3-wire RTD
and Ohms** 4-wire RTD
and Ohms T/Cs and Millivolts RTD with Compensation Loop*
RTD with
Compensation Loop*
Avg. Temp/∆T/
Hot Backup/Dual Sensor
with2RTDswith
Compensation Loop**
2-wire RTD
and Ohms
2-wire RTD
and Ohms** 3-wire RTD
and Ohms**
2-wire RTD
and Ohms 3-wire RTD and Ohms**
3144-0000E05A, F05A, A04A
RWW&G
G
B
***

Rosemount Model 3144 and 3244MV Smart Temperature Transmitters
2-10
Circuit Side of Electronics
Housing Mount the transmitter so that the circuit side is accessible. Be sure to
provide adequate clearance for cover removal. Also, be sure to account
for extra room if an LCD meter is installed. Refer to Section 6: Options
for more information on the LCD meter option.
Figure 2-8. Option Code B4 Mounting
Bracket.
Figure 2-9. Option Code B5 Mounting
Bracket.
3.65 ±0.06
1.0
1.55
(39.4)
2.81 ±0.03
(71.4)
0.375 (9.5)
Diameter
(2)5/16-inch Bolts not provided
PANEL MOUNT
2.0 ± 0.03
(50.8)
PIPE MOUNT
0.41 (10.4)
Diameter
1.04 (26)
(25.4)
2-inch
Pipestand
NOTE
Dimensions are in inches (millimeters).
3144-3144A14A, 0000A01A; 3044-2101A01A; 3144-1081A01B
1.0 (25)
6.4 (163) 7.2 (182
3144-0427B, 0427C

2-11
Installation
ENVIRONMENTAL
CONSIDERATIONS
Temperature Effects The transmitter will operate within specifications for ambient
temperatures between –40 and 185 °F (–40 and 85 °C). 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 the use of additional thermowell lagging, an extension
nipple, or a remote mounting configuration to isolate the transmitter
from the process. Figure 2-11 describes the relationship between
transmitter housing temperature rise and extension length.
Figure 2-10. Model 3144/3244MV
Transmitter Housing Temperature Rise
versus Extension Length for a Test
Installation.
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, suppose A = 40 °C.
For a process temperature of 540 °C (see Figure 2-10), an extension
length of 3.6 inches yields a housing temperature rise (R) of 22 °C,
which provides a safety margin of 23 °C. A six-inch extension length
(R = 10 °C) would offer a higher safety margin (35 °C) and would
reduce temperature-effect errors but would probably require extra
support for the transmitter. 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.
HOUSING TEMPERATURE RISE
ABOVE AMBIENT °C (°F)
3 4 5 6 7 8 9
0
60 (108)
50 (90)
40 (72)
30 (54)
20 (36)
10 (18)
3.6
22
Transmitter Housing
Temperature Rise vs.
Extension Length for a
Test Installation
EXTENSION LENGTH (IN.)
3044-0123A
540°C
250°
C
Oven
Temperature
(1,000°F)
815°C
(1,500°F)
Oven
Temperature
(482°F)
Oven
Temperature
TSA–=
T 85 °C 40 °C–=
T 45 °C=

Rosemount Model 3144 and 3244MV Smart Temperature Transmitters
2-12
Moist or Corrosive
Environments The Model 3144 and 3244MV transmitters have a highly reliable
dual compartment housing designed to resist attack by moisture and
corrosives. The sealed electronics module is mounted in a
compartment that is isolated from the terminal side conduit entries.
O-ring seals protect the interior when the covers are installed. In
humid environments, however, it is possible for moisture to
accumulate in conduit lines and drain into the housing.
Proper transmitter installation can ensure optimal operation and
service life and prevent moisture from accumulating in the housing.
Refer to Figure 2-11, and Figure 2-12 before mounting a transmitter.
Mount the transmitter at a high point in the conduit run, if possible,
so that moisture from the conduits will not drain into the housing. If
the transmitter is mounted at a low point in the conduit run, the
terminal compartment could fill with water. In some instances, the
installation of a poured conduit seal, such as the one pictured in
Figure 2-12, is advisable. Remove the terminal compartment cover
periodically and inspect the transmitter for moisture and corrosion.
Figure 2-11. Incorrect Conduit
Installation.
Figure 2-12. Recommended Mounting
with Drain Seal.
Conduit
Lines Conduit
Lines
3144-0429A, 0429B
Thermowell
Sensor Hex
Conduit for
Field Wiring
Poured Conduit Seal
(Where Required)
Union Coupling
with Extension
Sealing
Compound
3144-0430B