Honeywell stt850 SMARTLINE User Manual page 36

Input 1 TB6
Input TB7
Input 1 TB8
Input 2 TB8
Input 2 TB9
Non-Critical
Factory Cal
Supply Voltage
Comm Module Temp
DAC Temp Comp
HART/DE only
Sensor Comm
Display Setup
HART only
Excess: Delta (Dual
Inputs only)
(HART/FF only)
Internal Power
(HART only)
Digital Output
Page 26
OK
OPEN
OK
OPEN
OK
OPEN
OK
OPEN
OK
OPEN
OK
NO FACTORY CAL
OK
LOW OR HIGH
OK
OVER TEMP
OK
NO
COMPENSATION
OK
SUSPECT
OK
NVM Corrupt
OK
EXCESSIVE
OK
LOW OR HIGH
ON
OFF
STT850 Temperature Transmitter User's Manual
OPEN: Input 1 terminal TB6 is open
OPEN: Input 2 Terminal TB7 is open
(RTD and Ohm sensors only)
OPEN: Input 1 terminal TB8 is open
Applicable to RTD 4 wire
configuration for Sensor 1 RTD or
Sensor 1 Ohm input
OPEN: Input 2 terminal TB8 is open
Applicable to dual input model
OPEN: Input 2 terminal TB9 is open
Applicable to dual input model
The transmitter has not been
calibrated by the factory.
LOW: Supply voltage is below the
low specification limit.
HIGH: Supply voltage is above the
high specification limit.
OVER TEMP: Electronics
temperature is greater than 85

less than -40 C.
The DAC has not been compensated
for temperature effects. This is a
factory operation.
SUSPECT: The interface between
the Temperature Sensor Module and
the Electronics Module is
experiencing intermittent
communication failures.
NVM Corrupt: The Display memory is
corrupt.
EXCESSIVE: Delta value exceeds
Delta Limit
LOW: Internal power is below 2.9V"
and "HIGH: Internal power is above
3.2V.
State of Digital Output

C or
Revision 3