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Description
50049911-001 Temperature Transmitter in a process system
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
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
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
report various Transmitter status or setting conditions. The messages listed in
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.
50049911-001
Evaluate the site selected for the STT750 SmartLine Transmitter installation with respect to the
process system design specifications and Honeywell’s published performance characteristics for your
particular model. Some parameters that you may want to include in your site evaluation are:
Environmental Conditions:
o Ambient Temperature
o Relative Humidity
Potential Noise Sources:
o Radio Frequency Interference (RFI)
o Electromagnetic Interference (EMI)
Vibration Sources
o Pumps
o Motorized System Devices (e.g., pumps)
o Valve Cavitation
Process Parameters
o Temperature
o Maximum Sensor Input Ratings
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