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Reference Manual
00809-0200-4728, Rev SA
Table 2-1. Rosemount 644 Device Revisions and Files
Software date
NAMUR Software
Date
Revision
June 2012
1.1.1
1.
NAMUR Software Revision is located on the hardware tag of the device. HART Software Revision can be read using a HART Communication tool.
2.
Device Driver file names use Device and DD Revision, e.g. 10_01. HART Protocol is designed to enable legacy device driver revisions to continue to communicate with
new HART devices. To access new functionality, the new Device Driver must be downloaded. It is recommended to download the new Device Driver files to ensure full
functionality.
3.
HART Revision 5 and 7 Selectable. Dual Sensor support, Safety Certified, Advanced Diagnostics (if ordered), Enhanced Accuracy and Stability (if ordered).
2.3.2
Surges/transients
The transmitter will withstand electrical transients of the energy level encountered in static discharges or
induced switching transients. However, high-energy transients, such as those induced in wiring from
nearby lightning strikes, welding, heavy electrical equipment, or switching gears, can damage both the
transmitter and the sensor. To protect against high-energy transients, install the transmitter into a
suitable connection head with the integral transient protector, option T1. Refer to the Rosemount 644
Product Data Sheet
2.4
Configuration methods
Set all transmitter hardware adjustments during commissioning to avoid exposing the transmitter
electronics to the plant environment after installation.
The Rosemount 644 Transmitter can be configured either before or after installation. Configuring the
transmitter on the bench using either a Field Communicator, AMS Device Manager, or LOI ensures all
transmitter components are in working order prior to installation.
The Rosemount 644 Transmitter can be configured either on-line or off-line using a Field Communicator,
AMS Device Manager or the optional LOI (Head mount and field mount). During on-line configuration,
the transmitter is connected to a Field communicator. Data is entered in the working register of the
communicator and sent directly to the transmitter.
Off-line configuration consists of storing configuration data in a Field Communicator while it is not
connected to a transmitter. Data is stored in nonvolatile memory and can be downloaded to the
transmitter at a later time.
2.4.1
Configuring on the bench
To configure on the bench, required equipment includes a power supply, a digital multimeter (DMM),
and Field Communicator, AMS Device Manager, or a LOI – option M4.
Connect the equipment as shown in
point in the signal loop. To ensure successful HART Communication, a resistance of at least 250 Ohms
must be present between the transmitter and the power supply. Connect the Field Communicator leads
to the clips behind the power (+,–) terminals on the top of the device. Avoid exposing the transmitter
electronics to the plant environment after installation by setting all transmitter jumpers during the
commissioning stage on the bench.
Configuration
Identify device
HART Software
Revision
01
for more information.
Find device driver files
HART Universal
Device
(1)
Revision
Revision
5
8
7
9
Figure
2-1. Connect HART Communication leads at any termination
Review instructions
Document
(2)
Rosemount 644
Temperature Transmitter
Reference Manual
Configuration
July 2018
Review
functionality
Changes to
(3)
Software
See
Footnote 3
for list of changes
5
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