Emerson 644 Specifications Page 55

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Reference Manual
00809-0200-4728, Rev RA
Section 3: Hardware installation
April 2015
Hardware Installation
Section 3 Hardware Installation
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 45
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 45
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 46
Installation procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 47
Note
Each transmitter is marked with a tag indicating the approvals. Install the transmitter according
to all applicable installation codes, and approval and installation drawings (see
Appendix B:
Product Certifications). Verify the operating atmosphere of the transmitter is consistent with the
hazardous location certifications. Once a device labeled with multiple approval types is
installed, it should not be reinstalled using any of the other labeled approval types. To ensure
this, the approval label should be permanently marked to distinguish the approval type(s) used.
3.1 Overview
The information in this section covers installation considerations for the Rosemount 644
Temperature Transmitter with HART protocol. A Quick Start Guide (document number
00825-0200-4728) is shipped with every transmitter to describe recommended mounting and
wiring procedures for initial installation. Dimensional drawings for 644 mounting configurations
are included in Appendix A: Specifications and Reference Data.
3.2 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 ( ). Refer to the following safety messages before performing
an operation preceded by this symbol.
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