Honeywell STT750 SmartLine, User Manual

Page: 41 / 72

Revision 4 STT750
Temperature Transmitter User’s Manual
Page 31
5. Maintenance
5.1. Overview
This section provides information about preventive maintenance and replacing damaged parts. The
topics covered in this section are:

Replacement of damaged parts such as the Electronics Modules.
5.2. Preventive Maintenance Practices and Schedules
The STT750 SmartLine Transmitter does not require any specific maintenance at regularly scheduled
intervals.
Maintenance of the STT750 is limited to ensuring that connections, seals and mounting are tight and
secure. There are no moving parts or adjustments and hence no reason to open the field housing
except to inspect for corrosion or conductive dust entry which could later affect reliable operation.
The transmitter modules themselves should never be opened.
5.3. Replacing the Communication Module
The Communication module includes a connector to the optional Display module. This section
includes the procedure to replace the Communication module.
The transmitter does not have to be removed from service to replace the Comm
Module
Please take appropriate steps to avoid ESD damage when handling the
Communication and Display Module assemblies
Refer to
Figure 18 for parts locations.
Figure 18
– PWA Replacement