Chapter 4 Electrical Installation; Overview; Safety Messages - Emerson Rosemount 644 Reference Manual

Reference Manual
00809-0200-4728
4 Electrical Installation
4.1

Overview

The information in this section covers installation considerations for the Rosemount 644
Temperature Transmitter. A Quick Start Guide is shipped with every transmitter to
describe mounting, wiring, and basic hardware installation procedures for initial
installation.
4.2

Safety messages

Instructions and procedures in this section may require special precautions to ensure the
safety of the personnel performing the operations. Refer to the following safety messages
before performing an operation preceded by this symbol.
WARNING
Follow instruction
Failure to follow these installation guidelines could result in death or serious injury.
Ensure only qualified personnel perform the installation.
Explosion
Explosions could result in death or serious injury.
Do not remove the connection head cover in explosive atmospheres when the circuit is
live.
Before connecting a handheld communicator in an explosive atmosphere, ensure that
the instruments in the loop are installed in accordance with intrinsically safe or non-
incendive field wiring practices.
Verify that the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.
All connection head covers must be fully engaged to meet explosion-proof
requirements.
Process leaks
Process leaks could result in death or serious injury.
Do not remove the thermowell while in operation.
Install and tighten thermowells and sensors before applying pressure.
Electric shock
Electrical shock could cause death or serious injury.
Use extreme caution when making contact with the leads and terminals.
Emerson.com/Rosemount
Electrical Installation
March 2021
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