Page 40
STT850 Temperature Transmitter User’s Manual
Revision 3
Break Detect
(FF read only)
Enabled, Disabled
Enable or disable detection of Input
wire break
Press
↵
to
enter
menu
selection
↑ and ↓ to
select
entry.
↵
to enter
Latching
(FF read only)
Enabled, Disabled
When enabled, causes all critical
sensor input failures to latch to the
Critical Fault state. The fault may
only be cleared by device reset.
When disabled, the critical sensor
input failure will be cleared if the input
recovers.
CJ Type
(FF read only)
Internal, External, Fixed
Determines the source of the Cold
Junction compensation for
thermocouple Sensor types.
Fixed CJ Value
(FF read only)
####.##
When CJ Type is Fixed, specifies the
Cold Junction temperature value for
thermocouple Sensor types. Degrees
Celsius. Fixed CJ temperatures below
-50 degrees have no effect on
measured values.
Loop Ctrl Mode
(HART/DE)
(DE read only)
(Dual input only)
Average, Difference,
Sensor 1, Sensor 2,
Split-Range, Redundant
Mode of Loop control
Loop Source
(HART/DE)
(Dual input only)
Sensor 1, Sensor 2
Input sensor currently controlling the
Loop
Read Only
Parameter
LRV (HART/DE)
URV (HART/DE)
#. ##
#. ##
The limits are:
the Lower Range Limit (LRL) and the
Upper Range Limit (URL) of the
selected Sensor 1 ID
Press
↵
to
enter
menu
selection
↑ and ↓ to
select
digit.
↵
to enter
Set LRV
(HART/DE)
Set Lower Range Value
ATTENTION: Executing this service
will set the Lower Range Value (LRV)
equal to the input pressure
Set URV
(HART/DE)
Set Upper Range Value
ATTENTION: Executing this service
will set the Upper Range Value (URV)
equal to the input pressure
MRV (HART/FF)
(FF read only)
Set Middle Range Value
Limits are the minimum URL and
maximum LRL of the selected Sensor
1 and Sensor 2 IDs. Determines the
point of transition of Loop Control
between Sensor 1 and Sensor 2 for
Split-Range Loop Control Mode.
Hysteresis
(HART/FF)
(FF read only)
###.##
Hysteresis value relative to the MRV
for the transition of Loop Control
between Sensors when Loop Ctrl
Mode is Split-Range
Bumpless
Damping
(HART/FF)
(FF read only)
##.#
Damping value for the transition of
Loop Control between Sensors when
Loop Ctrl Mode is Split-Range or
Redundant
Damping
(HART/DE)
#. ##
Selection applies digital filtering to
suppress noise effects on the PV.
The limits for this value are 0.0 to
32.0 seconds
Summary of Contents for STT850 SMARTLINE
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