Honeywell STT750 SmartLine, User Manual

Page: 15 / 72

Revision 4 STT750
Temperature Transmitter User’s Manual
Page 5
2. Application Design
2.1. Overview
This section discusses the considerations involved with deploying a Honeywell STT750 SmartLine
Temperature Transmitter in a process system. The following areas are covered:

Safety

Input and output data

Reliability

Environmental limits

Installation considerations

Operation and maintenance

Repair and replacement
2.2. Safety
2.2.1. Accuracy
The STT750 SmartLine Temperature Transmitter (Transmitter) measures the temperature of a process
and reports the measurement to a receiving device. Refer to STT750 Specification,
34-TT-03-16.
2.2.2. Diagnostic Messages
Transmitter standard diagnostics are reported in the two basic categories listed in Table 3. Problems
detected as critical diagnostics drive the analog output to the programmed burnout level for HART.
Problems detected as non-critical diagnostics may affect performance without driving the analog
output to the programmed burnout level (for HART). Informational messages (not listed in
Table 3 )
report various Transmitter status or setting conditions. The messages listed in Table 3 are specific to
the Transmitter, exclusive of those associated with HART protocols. HART diagnostic messages are
listed and described in the
STT750 SmartLine Temperature Transmitter HART Option User Manual ,
document number 34-TT-25-15.