Page 48
STT700 Series HART/DE Option User’s Manual
Revision 1
Advanced Configuration/CVD2 (Callendar-Van Dusen constants for sensor 2)
Online/Device
Setup/Advanced
Configuration/CVD 2
Coefficients
Write CVD 2
Coefficients
User can configure CVD 2 coefficients
R0, Alpha, Delta and Beta
CVD 2 Low Limit
CVD 2 resistance for corresponding the low
temperature calibration point
CVD 2 High Limit
CVD 2 resistance for corresponding the high
temperature calibration point
R0
Resistance at 0
°
C
Alpha
Alpha CVD coefficient for sensor 2
Delta
Delta CVD coefficient for sensor 2
Beta
Beta CVD coefficient for sensor 2
Advanced Configuration/Alarm
Online/Advanced
Configuration/Alarm
Excess Delta Detect
Enable or Disable Excess Delta detection.
When Enabled, an alarm will be triggered when
the Delta PV (Sensor 1-Sensor 2 difference)
exceeds the configured Delta Limit.
Latching Alarm
Enable or Disable Latching Alarm.
When Enabled, critical fault is latched until user
acknowledges that the fault condition does not
persist.
Break Detect
Select to Enable or Disable Sensor Break
Detection. It is highly recommended to keep this
option Enabled. If there is a break or open in
either Sensor input, and Break Detect is
Enabled, a Critical Status will be generated. If
Break Detection is Disabled, no Critical Status is
set and the input value will be unreliable