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Reference Manual
00809-0400-4728, Rev AA
June 2011
Rosemount 644
www.rosemount.com
Rosemount 644
Temperature Transmitters
Rosemount 644 Hardware Revision
F
OUNDATION
™
Fieldbus Device Revision
Device Descriptor Revision
9
2
1
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.