Rosemount FISHER-ROSEMOUNT 244EH User manual

Models 244EH and 244ER
PC-Programmable Temperature
Transmitters
00809-0100-4737
English
Rev. EA

¢00809-0100-4737f¤
00809-0100-4737 Rev EA 10/00
Product
Manual
Models 244EH and 244ER
PC-Programmable
Temperature Transmitters
Fisher-Rosemount
satisfies all obligations
coming from legislation
to harmonise product
requirements in the
European Union.
© Rosemount Inc., 2000
Rosmeount Inc.
8200 Market Boulevard
Chanhassen, MN 55317
USA
Tel [phone]
Fax [phone]
Fisher-Rosemount Limited
Heath Place
Bognor Regis
West Sussex PO22 9SH
England
Tel [phone]
Fax [phone]
Fisher-Rosemount
Singapore Pte Ltd.
1 Pandan Crescent
Singapore 128461
Tel [phone]
Fax [phone]
[e-mail]
P
R
I
N
T
E
D
IN
U.
S.
A.
Product documentation available at...
www.rosemount.com
Rosemount Models 244EH and 244ER Smart Temperature Transmitters may be protected by one or more
U.S. Patents pending. Other foreign patents pending.
Rosemount and the Rosemount logotype are registered trademarks of Rosemount Inc.
Noryl and Lexan are registered trademarks of General Electric.
Microsoft, Windows, Windows 95, and Windows NT are registered trademarks of Microsoft Corp.
MINIGRABBER is a trademark of Pamona Electronics.
WAGO is a registered trademark of Kontakttechnik GmbH.
Cover photo: 644-244C901
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.

1
Table of Contents
SECTION 1
Introduction SafetyMessages.....................................1-1 Transmitter Overview.................................1-1
ManualOverview....................................1-2
Considerations ......................................1-3
General..........................................1-3
Mechanical.......................................1-3
Electrical ........................................1-3
Environmental....................................1-3
SECTION 2
Installation SafetyMessages.....................................2-1 Warnings........................................2-1
ToolsneededforInstallation ...........................2-2
Mounting...........................................2-3
SpecialMountingConsiderations.....................2-4
InstallationProcedures................................2-5
Transmitter.......................................2-5
ConfigurationSoftware.............................2-9
Model 244EC Configuration Interface ................2-11
FieldWiring.......................................2-12
SensorConnections...............................2-13
FailureMode.......................................2-16
ChangingSwitchPositions .........................2-16
SECTION 3
Operation SafetyMessages.....................................3-1 Warning.........................................3-1
Power Supply .......................................3-1
Surges/Transients..................................3-1
Grounding .......................................3-2
Configuration.......................................3-2
ConfiguringaSingleTransmitter .....................3-3
ConfiguringSeveralTransmittersIdentically............3-4
ViewingtheProcessVariable........................3-5
Intermittent Sensor Algorithm ..........................3-5
CaseExamples....................................3-6
Intermittent Sensor Algorithm and Damping.............3-7
Intermittent Sensor Detect (Advanced Feature)...........3-8
Implementation ...................................3-9
SECTION 4
Maintenance and
Troubleshooting
SafetyInformation...................................4-1
Warning.........................................4-1
Troubleshooting .....................................4-1
Model 244EH software version 5.5.1 ..................4-1

Rosemount Models 244EH and 244ER PC-Programmable Temperature Transmitters
2
APPENDIX A
Reference Data Transmitter Specification .............................A-1 Functional.......................................A-1
Performance.....................................A-2
Physical........................................A-5
Model 244EC Configuration Interface ................A-5
OrderingInformation................................ A-6
Ordering Flameproof and Explosion-proof Approvals
forTemperatureAssemblies........................A-8
DimensionalDrawings...............................A-9
Transmitter......................................A-9
Enclosure and Model 244EC Configuration Interface.....A-9
APPENDIX B
Approvals SafetyMessages.................................... B-1 Hazardous Locations Installations ...................... B-1
LocationsCertifications.............................. B-2
InstallationDrawings................................ B-4
APPENDIX C
Models 644 and 244E
Temperature Transmitters
Manual Supplement
Old Transmitter..................................... C-2
Transmitter Design................................ C-2
SensorWiringDiagrams........................... C-2
SpecialMountingConsiderations.................... C-2
New Transmitter.................................... C-3
Transmitter Design................................ C-3
SensorWiringDiagrams........................... C-3
SpecialMountingConsiderations.................... C-3
HART Communicator (Model 644H only) ............. C-3
Specifications...................................... C-4

Section
1-1
1Introduction
SafetyMessages ................................page1-1
TransmitterOverview.............................page1-1
ManualOverview ................................page1-2
Considerations ..................................page1-3
SAFETY MESSAGES Procedures and instructions in this manual may require special
precautions to ensure the safety of the personnel performing the
operations. Information that raises potential safety issues is indicated
by a warning symbol ( ). Refer to the safety messages listed at the
beginning of each section before performing an operation preceded by
this symbol.
TRANSMITTER OVERVIEW Thank you for choosing the Model 244E. Features of the Model 244EH
and Model 244ER transmitters include:
• Configuration using the Model 244EC Configuration Interface
and a Microsoft®Windows®-based PC running the Models 244EH
and 244ER Configuration Software
• The ability to convert RTD and thermocouple inputs to 4–20 mA,
2-wire outputs that are less susceptible to electrical noise
• The capability to linearize RTD and thermocouple inputs
with temperature
• Electrical input-output isolation
• Electronics that are completely encapsulated in epoxy and
enclosed in a metal housing, making the transmitter extremely
durable and ensuring long-term reliability
• A compact size and two housing options allowing mounting
flexibility for the control room or the field
Rosemount Inc. has a full range of compatible connection heads,
sensors, and thermowells to provide complete assemblies for process
temperature measurements. Refer to Volume 1 of the Rosemount
Temperature Sensors and Assemblies Product Data Sheet (document
number 00813-0100-2654) for thread mount sensors and accessories, or
refer to Volume 2 (document number 00813-0100-2654) for DIN-style
sensors and accessories.
Failure to follow these installation guidelines could result in death or
serious injury.
• Make sure only qualified personnel perform the installation.

Rosemount Models 244EH and 244ER PC-Programmable Temperature Transmitters
1-2
MANUAL OVERVIEW This manual is designed to assist in the installation, operation, and
maintenance of Rosemount®Model 244EH and 244ER PC
Programmable Temperature Transmitters and the Model 244EC
Configuration Interface.
Section 2: Installation
• Tools for installation
• Mounting
• Installation
• Field wiring
Section 3: Operation
• Power Supply
• Configuration
Section 4: Maintenance and Troubleshooting
• Software Troubleshooting
Appendix A: Reference Data
• Specifications
• Dimensional drawings
• Ordering information
Appendix B: Approvals
• Locations certifications
• Installation drawings
Appendix C: Models 644 and 244E Temperature Transmitters Manual
Supplement
• Comparison between new and old Models 644 and 244E
• Specifications

1-3
CONSIDERATIONS
General Electrical temperature sensors such as RTDs and thermocouples
produce low-level signals proportional to their sensed temperature. The
Models 244EH and 244ER transmitters convert the low-level sensor
signal 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.
Mechanical When choosing an installation location and position, take into account
the need for access to the transmitter.
Wiring Connections
Make wiring connections through the cable entry in the side of the
connection head. Be sure to provide adequate clearance for
cover removal.
Electrical Proper electrical installation is necessary to prevent errors due to
sensor lead resistances and electrical noise. Shielded cable should be
used in electrically noisy environments.
Environmental The transmitter electronics module is permanently sealed within the
housing, resisting moisture and corrosive damage. Verify that the
operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.

Section
2-1
2Installation
SafetyMessages ................................page2-1
ToolsneededforInstallation.......................page2-2
Mounting . ......................................page2-3
InstallationProcedures ...........................page2-5
FieldWiring.....................................page2-12
FailureMode ....................................page2-16
SAFETY MESSAGES Instructions and procedures in this section may require special
precautions to ensure the safety of the personnel performing the
operations. Information that raises potential safety issues is indicated
by a warning symbol ( ). 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 enclosure cover in explosive atmospheres when the circuit
is live.
• Verify that the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certification.
• Enclosure covers must be fully engaged to meet explosion-proof requirements.
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. Doing so 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 condition or
installation error occurs, high voltage may be present on transmitter leads
and terminals.
• Use extreme caution when making contact with leads and terminals.

Rosemount Models 244EH and 244ER PC-Programmable Temperature Transmitters
2-2
Figure 2-1. Transmitter
Installation Flowchart
TOOLS NEEDED FOR
INSTALLATION The tools needed for installation are as follows:
Begin Here Transmitter
Configured?
Configure
Transmitter
Set Sensor
Type
SetNumber
of Wires
Set50/60Hz
Filter
Set Units
Set Range
Values
Set
Damping
Field
Install
Set Failure
Mode Switch
Mount
Transmitter
Wire
Transmitter
Power
Transmitter
Check for
Leaks
Done
244-244_02A
Models 244EH and 244ER: • Transmitter
• Mounting apparatus
Model 244EC Configuration Interface: • Transmitter
• 9-pin connector cable
• MINIGRABBER™clips
Model 244EH and 244ER Configuration Software: •PC
• Windows-based software

2-3
MOUNTING The Model 244EH installs in a connection head or universal head
mounted directly on a sensor assembly, apart from a sensor assembly
using a universal head, or to a DIN rail using an optional mounting
clip. The Model 244ER mounts directly to a wall or to a DIN rail.
The Models 244EH and 244ER transmitters will operate within
specifications for ambient temperatures between –40 and 185 °F
(–40 and 85 °C).
In a direct mounting configuration using a Model 244EH transmitter,
process heat is transferred from the thermowell to the transmitter via
the connection head. If the expected connection head 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 excessive temperatures.
Figure 2-2 provides an example of the relationship between transmitter
housing temperature rise and extension length. Use Figure 2-2 as a
guide for determining adequate thermowell extension length.
Figure 2-2. Model 244EH Connection
Head Temperature Rise vs. Extension
Length
Example
The transmitter specification limit is 85 °C. If the ambient temperature
is 55 °C and the process temperature to be measured is 800 °C, the
maximum permissible connection head temperature rise is the
transmitter specification limit minus the ambient temperature
(85 –55 °C), or 30 °C. In this case, an extension of 100 mm meets this
requirement, but 125 mm provides a margin of 8 °C, thereby reducing
any temperature effects in the transmitter.
3044-0123A
60
50
40
30
20
10
075 100 125 150 175 200 225
Temperature Rise Above Ambient (°C)
Extension Length (mm)
815°
C
Process
Temperature
540°C
Process
Temperature
250°C
Process
Temperature

Rosemount Models 244EH and 244ER PC-Programmable Temperature Transmitters
2-4
Special Mounting
Considerations Special mounting hardware is available for mounting a
Model 244EH head mount transmitter to a DIN rail, or assembling
a new Model 244EH to an existing threaded sensor connection head
(former option code L1).
Mounting a Model 244EH to a DIN Rail
To attach a head mount transmitter to a DIN rail, assemble the
appropriate rail mounting kit (part number 00644-5301-0010) to the
transmitter as shown in Figure 2-3, then follow the procedure under
“Rail Mount Transmitter with Integral Mount Sensor” on page 2-7.
Figure 2-3. Assembling Rail Clip
Hardware to a Model 244EH
Retrofitting a Model 244EH for Use in an Existing Threaded Sensor
Connection Head
To mount a Model 244EH in an existing threaded sensor connection
head (former option code L1), order the Model 244EH retrofit kit (part
number 00644-5321-0010). The retrofit kit includes a new mounting
bracket and all associated hardware necessary to facilitate the
installation of the Model 244EH in the existing head.
Figure 2-4. Assembling Model
244EHforUseinanExistingL1
Connection Head
G-Rail (asymmetric) Top Hat Rail (symmetric)
Note: Kit includes Mounting Hardware and both types of rail kits.
Transmitter
Mounting
Hardware
Rail Clip
Transmitter
Mounting
Hardware
Rail Clip
644-5302B01A, D02A
644-5321A01A
Kit includes replacement
bracket and screws.
Existing Threaded Sensor
Connection Head
(Former option code L1)

2-5
INSTALLATION
PROCEDURES
Transmitter Refer to the appropriate procedure and the accompanying illustrations
when installing the transmitter.
Head Mount Transmitter with DIN Plate Style Sensor
The least complicated assembly uses:
• an integral mount sensor with flying leads
• an integral DIN style connection head
•astandardextension
•athreadedthermowell
Refer to Volume 2 of the Rosemount Sensors Product Data Sheet
(document number 00813-0101-2654) for complete sensor and
mounting accessory information.
To complete the assembly, follow the steps described below.
1. Attach the thermowell to the pipe or process container wall. Install
and tighten the thermowell before applying pressure.
2. Set the transmitter failure mode switch
(see Figure 2-13 on page 2-16).
3. Assemble the transmitter to the sensor. Push the transmitter
mounting screws through the sensor mounting plate and insert the
snap rings (optional, part number 00644-4432-0001) into the
groove of each transmitter mounting screw.
4. Insert the transmitter-sensor assembly into the connection head.
Thread the transmitter mounting screw into the connection head
mounting holes.
5. Assemble the extension to the connection head. Insert the
assembly into the thermowell.
6. Attach a cable gland into the shielded cable.
7. Insert the shielded cable leads into the connection head through
the cable entry. Connect and tighten the cable gland.
8. Connect the shielded cable leads to the transmitter power
terminals. Avoid contact with leads and terminals.
9. Install and tighten the connection head cover. Enclosure covers
must be fully engaged to meet explosion-proof requirements.
Figure 2-5. Typical Model 244EH
Mounting Configuration Using Integral
Mount Sensor and Assembly
644-0000B04A
Model 244EH
Transmitter
Integral Mount Sensor
with Flying Leads Threaded Extension
Threaded
Thermowell
C
onnection
Head

Rosemount Models 244EH and 244ER PC-Programmable Temperature Transmitters
2-6
Head Mount Transmitter with Threaded Sensor
The least complicated assembly uses:
• a threaded sensor with flying leads
• the universal connection head
• a union and nipple extension assembly
•athreadedthermowell
Refer to Volume 1 of the Rosemount Sensors Product Data Sheet
(document number 00813-0100-2654) for complete sensor and
mounting accessory information.
To complete the assembly, follow the steps as described below.
1. Attach the thermowell to the pipe or process container wall. Install
and tighten thermowells before applying pressure.
2. Attach necessary extension nipples and adapters. Seal the nipple
and adapter threads with silicone tape.
3. Screw the sensor into the thermowell. Install drain seals if
required for severe environments or to satisfy code requirements.
4. Set the transmitter failure mode switch
(see Figure 2-13 on page 2-16).
5. Pull the sensor wiring leads through the extensions and adapters
into the universal head. Mount the transmitter in the universal
head by threading the transmitter mounting screws into the
universal head mounting holes.
6. Mount the assembly into the thermowell. Seal adapter threads
with silicone tape.
7. Install conduit for field wiring to the conduit entry of the universal
head. Seal conduit threads with silicone tape.
8. Pull the field wiring leads through the conduit into the universal
head. Attach the sensor and power leads to the transmitter. Avoid
contact with leads and terminals.
9. Install and tighten the universal head cover. Enclosure covers
must be fully engaged to meet explosion-proof requirements.
Figure 2-6. Typical Model 244EH
Transmitter Mounting Configuration
Using Threaded Style Sensor
and Assembly
644-0000A04A
Standard
Extension
Threaded Thermowell
Universal Head
Threaded Style Sensor

2-7
Rail Mount Transmitter with Integral Mount Sensor
The least complicated assembly uses:
• an integral mount sensor with terminal block
• an integral DIN style connection head
•astandardextension
•athreadedthermowell
Refer to Volume 2 of the Rosemount Sensors Product Data Sheet
(document number 00813-0101-2654) for complete sensor and
mounting accessory information.
To complete the assembly, follow the procedure described below.
1. Attach the transmitter to a suitable rail or panel.
2. Attach the thermowell to the pipe or process container wall. Install
and tighten the thermowell before applying pressure.
3. Attach the sensor to the connection head and mount the entire
assembly to the thermowell.
4. Attach sufficient lengths of sensor lead wire to the sensor terminal
block.
5. Attach and tighten the connection head cover. Enclosure covers
must be fully engaged to meet explosion-proof requirements.
6. Run sensor lead wires from the sensor assembly to the transmitter.
7. Set the transmitter failure mode switch
(see Figure 2-13 on page 2-16).
8. Attach the sensor and power leads to the transmitter. Avoid
contact with leads and terminals.
Figure 2-7. Typical Rail Mount
Transmitter Mounting Configuration
Using Integral Mount Sensor
and Assembly Integral Mount Sensor
with Terminal Block
Connection Head
Standard Extension
Threaded Thermowell
Rail Mount Transmitter
Sensor Leads
with Cable Gland
644-0000C04A

Rosemount Models 244EH and 244ER PC-Programmable Temperature Transmitters
2-8
Rail Mount Transmitter with Threaded Sensor
The least complicated assembly uses:
• a threaded sensor with flying heads
• a threaded sensor connection head
• a union and nipple extension assembly
•athreadedthermowell
Refer to Volume 1 of the Rosemount Sensors Product Data Sheet
(document number 00813-0100-2654) for complete sensor and
mounting accessory information.
To complete the assembly, follow the procedure described below.
1. Attach the transmitter to a suitable rail or panel.
2. Attach the thermowell to the pipe or process container wall. Install
and tighten the thermowell before applying pressure.
3. Attach necessary extension nipples and adapters. Seal the nipple
and adapter threads with silicone tape.
4. Screw the sensor into the thermowell. Install drain seals if
required for severe environments or to satisfy code requirements.
5. Screw the connection head to the sensor.
6. Attach the sensor lead wires to the connection head terminals.
7. Attach additional sensor lead wires from the connection head to
the transmitter.
8. Attach and tighten the connection head cover. Enclosure covers
must be fully engaged to meet explosion-proof requirements.
9. Set the transmitter failure mode switch
(see Figure 2-13 on page 2-16).
10. Attach the sensor and power leads to the transmitter. Avoid
contact with leads and terminals.
Figure 2-8. Typical Rail Mount
Transmitter Mounting Configuration
Using Threaded Style Sensor
and Assembly Rail Mount
Transmitter
Threaded
Style Sensor Threaded
Thermowell
Standard
Extension
Threaded Sensor
Connection Head
644-0000A04B

2-9
Multichannel Installations
Several transmitters can be connected to a single master power supply
as shown in Figure 2-9. 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 a back-up
battery or power supply that cannot be interrupted. The diodes shown
in Figure 2-9 prevent unwanted charging or discharging of the
back-up battery.
Figure 2-9. Multichannel Installations
Configuration Software System Requirements
For the configuration software to function properly, the following
minimum PC requirements must be observed.
• 80386 or faster processor
• 1 MB free disk space
• 3.5-inch floppy disk drive
• Mouse or other pointing device
• 256 color display (recommended settings are 16-bit color at
1024 × 728 screen resolution)
• Microsoft Windows 3.1, Windows for Workgroups 3.11,
Windows 95, or Windows NT.
The configuration software is available in English, French, German,
Italian, Spanish, Chinese, Japanese, and Korean language versions.
The configuration software automatically selects the appropriate
language based on the language version of Windows.
NOTE
Close all currently running applications before starting the
installation procedure.
NOTE
Windows 98 is not compatible with this software.
Transmitter
No. 1
Transmitter
No. 2
RLead
RLead
RLead
Readout or
Controller
No.1
Readoutor
Controller
No. 2 To Additional Transmitters
dc
Power
Supply
Backup Battery
3044-0131A

Rosemount Models 244EH and 244ER PC-Programmable Temperature Transmitters
2-10
Choose the procedure that matches the operating system you are using.
Procedure for Windows 3.1 or Windows for Workgroups 3.11
1. If you do not have Win32s installed, install it now. Follow the
instructions on the diskette label.
2. Insert the Models 244EH and 244ER Configuration Software
diskette into your floppy disk drive.
3. In the File Manager, choose RUN from the FILE menu.
4. The RUN dialog box appears. In the COMMAND LINE text box,
type <drive>:\setup. Substitute the letter of your floppy disk drive
(usually aor b) for <drive>. Click OK.
5. The WELCOME window appears. Click OK.
6. The SELECT DESTINATION DIRECTORY window appears. To
accept the default installation directory, click OK. To specify a
different installation directory, either type a new directory path in
the DESTINATION DIRECTORY text box or select one from the list.
Click OK.
7. The COMM SETTINGS window appears. In the COMM PORT
drop-down box, choose the communication port to which you
intend to connect the Model 244EC. Click OK.
8. The SELECT PROGRAM MANAGER GROUP window appears. To
accept the default Program Manager group name, click OK. To
specify a different group name, either type a new name in the
GROUP NAME text box or select one from the list. Click OK.
Procedure for Windows 95 or Windows NT
1. Insert the Models 244EH and 244ER Configuration Software
diskette into your floppy disk drive.
2. Click the START button on taskbar. Click RUN.
3. The RUN dialog box appears. In the OPEN text box, type
<drive>:\setup. Substitute the letter of your floppy disk drive
(usually aor b) for <drive>. Click OK.
4. The SELECT DESTINATION DIRECTORY window appears. To
accept the default installation directory, click OK. To specify a
different installation directory, either type a new directory path in
the DESTINATION DIRECTORY text box or select one from the list.
Click OK.
5. The COMM SETTINGS window appears. Choose the
communication port to which you intend to connect the
Model 244EC from the COMM PORT drop-down box. Click OK.
6. The SELECT PROGRAM MANAGER GROUP window appears. To
accept the default Program Manager group name, click OK. To
specify a different group name, either type a new name in the
GROUP NAME text box or select one from the list. Click OK.

2-11
Screen Conventions
The Models 244EH and 244ER Configuration Software follows the
Microsoft Windows screen conventions with the following exception:
Configuration parameters change color to indicate fields where
information has changed. Before placing a new transmitter into service,
or before returning a transmitter to service after changing
configuration information, verify that the values in the fields that have
been changed reflect the correct configuration parameters for your
application. For example, if you change the Sensor Type field to PT100–
Alpha 392, the Number of Wires, Units, 4 mA Point, and 20 mA Point
fields all change to reflect the default PT100–Alpha 392 sensor values.
Verify all information before placing the transmitter into service.
Model244ECConfiguration
Interface The Model 244EC Configuration Interface is a portable, self-contained
link between your PC and a Model 244. The Model 244EC connects to a
PC serial port with a standard 9-pin interconnecting plug and connects
to a transmitter with two MINIGRABBER™clips.
The Model 244EC will also operate using a wall power adapter or a
single replaceable 9-volt battery.
Setting Up the Model 244EC Configuration Interface
All necessary power is provided through the configuration leads from
the Model 244EC to the transmitter. The sensor does not need to be
disconnected in order to configure the transmitter.
To set up the Model 244EC Configuration Interface and prepare it for
use, refer to Figure 2-10 on page 2-12 and follow the procedure
described below.
1. Install the 9-volt battery in the Model 244EC. Be sure the power
switch remains in the “OFF” position.
2. Attach the ribbon cable from the Model 244EC to the serial port of
your PC using the 9-pin interconnecting plug. If your PC has a
25-pin serial port, you will need a 25-pin to 9-pin adapter to
accommodate the connection.
NOTE
It is not necessary to power down your PC before you attach the
Model 244EC. However, if you are using a desktop model, you may wish
to power down to reduce the risk of electric shock or computer damage.
3. Attach the configuration leads to the Model 244EC using the
banana jacks provided. Be sure to observe proper polarity—attach
the red lead to the positive (+) jack on the Model 244EC and the
black lead to the negative (–) jack.
4. Attach the configuration leads to the configuration terminals
(labeled “PROG”) on the transmitter using the MINIGRABBER
clips provided. Be sure to observe proper polarity—attach the red
lead to the positive (+) terminal on the transmitter and the black
lead to the negative (–) terminal.

Rosemount Models 244EH and 244ER PC-Programmable Temperature Transmitters
2-12
5. Turn on the Model 244EC using the power switch on the top side of
the housing.
NOTE
Verify that the Model 244EC “Low Battery” LED is not on before
initiating communication with the transmitter. If the low battery LED
is on, you will not be able to configure the transmitter.
6. Using your PC, open the Configuration Software program.
Access the online help if you have questions regarding the use
of the program.
Figure 2-10. Complete Transmitter
Configuration System
FIELD WIRING All power to the transmitter is supplied over the signal wiring. Use
ordinary copper wire of sufficient size to ensure that the voltage across
the transmitter power terminals does not drop below 12.0 V dc.
If the sensor is installed in a high-voltage environment and a fault
condition or installation error occurs, the sensor leads and transmitter
terminals could carry lethal voltages. Use extreme caution when
making contact with the leads and terminals.
NOTE
Do not apply high voltage (e.g., ac line voltage) to the transmitter
terminals. Abnormally high voltage can damage the unit. (Sensor and
transmitter power terminals are rated to 42.4 V dc.)
For multichannel installations, see “Multichannel Installations” on
page 2-9. The transmitters will accept inputs from a variety of RTD and
thermocouple types. Refer to Figure 2-12 on page 2-15 when making
sensor connections.
Model 244EC
Configuration
Interface
Model 244EH or 244ER
Transmitter
Windows-based PC Running
the Configuration Software
244-011AB