Revision 4.0
STT850 Series HART/DE Option User’s Manual
Page 95
9.3 DE Diagnostic Message
Table 28
– DE Diagnostic Messages
Critical Diagnostics
(Failure Conditions)
Non-Critical Diagnostics (Warning Conditions)
Temperature Sensor Module
Failure
Excess Cal Correct
(Excess LRV Correct and/or Span correct for Sensor Input 1)
Sensor Input 1 Failure
Input 1 Out of Range
(Sensor Input 1 Under Range or Over Range)
Sensor Input 2 Failure
Input 2 Out of Range
(Sensor Input 2 Under Range or Over Range)
Communication Module Failure
Sensor Module Over Temperature
Sensor Comm. Timeout
Cold Junction Out of Range Error
Sensor Input 1 Open
Sensor Input 2 Open
Sensor Input 1 TB6 Open
Sensor Input 2 TB8 Open
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
