Emerson Rosemount 644 with HART Protocol User Manual

Reference Manual
00809-0200-4728, Rev SA
Troubleshooting
July 2018
65
Troubleshooting
Section 5 Operation and Maintenance
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 65
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 65
Calibration overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 66
Sensor input trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 66
Trim the analog output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 69
Transmitter-sensor matching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 71
Switching HART Revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 73
5.1 Overview
This section contains information on calibrating Rosemount
™
644 Temperature Transmitter. Field
Communicator, AMS Device Manager, and Local Operator Interface (LOI) instructions are given to
perform all functions.
5.2 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.
Failure to follow these installation guidelines could result in death or serious injury.
Make sure only qualified personnel perform the installation.
Explosions could resulting death or serious injury.
 Do not remove the connection head cover in explosive atmospheres when the circuit is live.
 Before connecting a Field Communicator in an explosive atmosphere, make sure 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 could result in death or serious injury.
 Do not remove the thermowell while in operation.
 Install and tighten thermowells and sensors before applying pressure.
Electrical shock could cause death or serious injury.
Use extreme caution when making contact with the leads and terminals.

Emerson Rosemount 644 with HART Protocol Specifications

General

Brand	Emerson
Model	Rosemount 644 with HART Protocol
Category	Transmitter
Language	English