Honeywell STT850 Series User Manual

Revision 4.0 STT850 Series HART/DE Option User’s Manual Page 93
9.2 HART Diagnostic Details
Table 27 lists and describes the HART critical and non-critical HART diagnostic details.
Table 27 – HART Critical and Non-Critical Diagnostic Details
Critical
<Return>
Active Diags
# #
Description
Sensor Module
OK
FAULT
FAULT: There is a problem with the
Sensor Module
Comm Module
OK
FAULT
FAULT: There is a problem with the
Electronics Module (HART, DE, or
Fieldbus)
Sensor Comm
OK
FAULT
FAULT: There is a problem with the
interface between the Sensor Module
and the Electronics Module.
Input 1
OK
FAULT
FAULT: There is a problem with the
Input 1 sensor
Input 2 (Dual
Inputs only)
OK
FAULT
FAULT: There is a problem with the
Input 2 sensor
Non Critical
<Return>
Active Diags
# #
Shows the number of Non-Critical
Diagnostics that are currently active
Cal 1 Correct
OK
EXCESSIVE
EXCESSIVE: Input applied exceeds
5% of expected value
Cal 2 Correct
(Dual Inputs only)
(HART/FF only)
OK
EXCESSIVE
EXCESSIVE: Input applied exceeds
5% of expected value
Sensor Temp
OK
OUT OF RANGE
Electronics temperature is greater
than 85C
Input 1 Range
OK
OUT OF RANGE
OUT OF RANGE:
Input 1 temperature is greater than
Sensor 1 URL or less than Sensor 1
LRL
Input 2 Range
(Dual Inputs only)
OK
OUT OF RANGE
OUT OF RANGE:
Input 2 temperature is greater than
Sensor 2 URL or less than Sensor 2
LRL
CJ Range
OK
OUT OF RANGE
OUT OF RANGE: Cold Junction
temperature is greater than 85C or
less than -40C.
Input 1
OK
OPEN
OPEN: Input 1 is open.
Input 2 (Dual
Inputs only)
OK
OPEN
OPEN: Input 2 is open.
Input 1 TB6
OK
OPEN
OPEN: Input
1 Terminal TB6 is open.
Input 2 TB8 (Dual
Inputs only)
OK
OPEN
OPEN: Input 2 Terminal TB8 is open.
Factory Cal
OK
NO FACTORY CAL
The transmitter has not been
calibrated by the factory.
Supply Voltage
OK
LOW OR HIGH
LOW: Supply voltage is below the
low specification limit.
HIGH: Supply voltage is above the
high specification limit.

Honeywell STT850 Series Specifications

General

Brand	Honeywell
Model	STT850 Series
Category	Transmitter
Language	English