Honeywell STT850 Series User Manual

Page 92 STT850 Series HART/DE Option User’s Manual Revision 4.0
9 Troubleshooting and Maintenance
Table 26 lists both critical and non-critical (warning conditions) diagnostics.
9.1 HART Diagnostic Messages
Table 26 critical and non-critical HART diagnostic messages.
Table 26 – HART Diagnostic Messages
Critical Diagnostics
(Failure Conditions)
Non-Critical Diagnostics (Warning Conditions)
Temperature Sensor Module
Failure
Excess Cal 1 Correct
(Excess LRV Correct and/or Span correct for Sensor Input 1)
Sensor Input 1 Failure
Excess Cal 2 correct (not available for DE)
(Excess LRV Correct and/or Span correct for Sensor Input 2)
Sensor Input 2 Failure
Input 1 Out of Range
(Sensor Input 1 Under Range or Over Range)
Communication Module Failure
Input 2 Out of Range
(Sensor Input 2 Under Range or Over Range)
Sensor Comm. Timeout
Sensor Module Over Temperature
Cold Junction Out of Range Error
Sensor Input 1 Open
Sensor Input 2 Open
Sensor Input 1 TB5 Open
Sensor Input 1 TB6 Open
Sensor Input 1 TB7 Open
Sensor Input 2 TB7 Open
Sensor Input 2 TB8 Open
Sensor Input 2 TB9 Open
Digital Output status
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
Excess Delta (not available for DE)
Internal Power failure for Communication Module
(not available for DE)

Honeywell STT850 Series Specifications

General

Brand	Honeywell
Model	STT850 Series
Category	Transmitter
Language	English