Honeywell STT750 SmartLine - 3.5.4. Grounding and Lightning Protection; 3.5.5. Explosion-Proof Conduit Seal

Page 6 STT750 Temperature Transmitter User’s Manual Revision 4
Table 3 – STT750 Standard Critical Diagnostics Messages
Critical Diagnostics
(Failure Conditions)
Temperature Sensor Module Failure
Communication Module Failure
Sensor Comm. Timeout
Input Fault
Table 4 – STT750 Standard Non-Critical Diagnostics Messages
Non-Critical Diagnostics (Warning Conditions)
Excess Cal Correct
(Excess LRV Correct and/or Span correct for Sensor Input)
Input Out of Range
(Sensor Input Under Range or Over Range)
Sensor Module Over Temperature
Cold Junction Out of Range Error
Sensor Input TB5, TB6, TB7 Open (RTD and Ohm)
No Factory Calibration
Supply Voltage Fault
(External Supply Voltage Fail)
Communication Module Over Temperature
No DAC Compensation
Unreliable communication between Sensor and Comm
Modules
Display NVM Fault
Internal Power Failure for Communication Module