Reference Manual
00809-0100-4728, Rev HA
December 2002
Models 644H and 644R
www.rosemount.com
Models 644H and 644R Smart
Temperature Transmitters
Rosemount Model 644 Smart Temperature Transmitters may be protected by one or more U.S.
Patents pending. Other foreign patents pending.
Model 644 Hardware Revision
HART
®
Device Revision
HART Communicator Field Device Revision
26
5.6
Dev v6, DD v1
NOTICE
Read this manual before working with the product. For personal and system safety, and for
optimum product performance, make sure to thoroughly understand the contents before
installing, using, or maintaining this product.
The United States has two toll-free assistance numbers and one international number.
Customer Central
1-800-999-9307 (7:00 a.m. to 7:00 P.M. CST)
National Response Center
1-800-654-7768 (24 hours a day)
Equipment service needs
International
1-(952) 906-8888
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 a Emerson Process
Management Sales Representative.
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