Honeywell STT850 Series - Page 50

Page 40 STT850 Series HART/DE Option User’s Manual Revision 4.0
Online/Device
Setup/Basic Setup/
Device Information
(Continued …)
PV Units
Select one of the pre-programmed engineering
units. STT850 Temperature readings can be
displayed in the following engineering units:
o
C,
o
F,
o
Kelvin,
o
R, mV, Ohms
PV Damping
Enter a value for damping of the device output.
Entries may be any value from 0.00 to 102.00
seconds.
SV Units
Select the desired unit for measurement of the
Secondary Variable (Cold Junction Temperature)
Write Protect
Displays the current configuration of the write
protect function. Write Protect is “Enabled” if
either the write protect jumper on the electronics
board is in the “ON” position or the firmware write
protect has been enabled.
Loop control mode
Offers selection of loop control mode. There are
6 modes: Averaging, Differential, Sensor1,
Sensor2, Redundant and Split ranging
Damp Bumpless
transfer
When loop control mode is Redundant or Split
ranging, this option will be enabled in device
information. This damping constant will prevent
sudden shifts in output due to control switching
between inputs. Range is from 0 to 99.9 sec
Online/Device
Setup/Calibration
PV Levels
Displays a graphic representation of all PV
ranges and limits for the STT850 Temperature
Transmitter
Calibration Methods
The following calibration methods are available:
Apply Values: performs a Set LRV and/or Set
URV to configure the LRV/URV to applied
inputs.
Enter Values: enter desired LRV and URV
value to configure the desired operating
range. Valid entries are from LTL1 and 2
to UTL1 and 2 (lower/upper transducer
limits of two sensors and depending on
loop control mode).
D/A Trim: perform an analog output calibration
at 4.00 and 20.00 mA (0% and 100%
output).
LRV Correct: perform an input calibration
correction by applying process input at the
configured Low Calibration Point.
URV Correct: perform an input calibration
correction by applying process input at the
configured High Calibration Point.
Reset Corrects: clear all user calibration
adjustments.
Correct URV Records
Displays the time and date history records for the
last three URV Correct calibrations.
Correct LRV Records
Displays the time and date history records for the
last three LRV Correct calibrations.
Reset Correct Records
Displays the time and date history records for the