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Reference Manual
00809-0100-4021, Rev GC
Appendix A: Reference Data
April 2014
Option Code U2
Average temperature with Hot Backup and sensor drift alert – Warning Mode
Primary Usage
Critical applications, such as safety interlocks and control loops. Outputs the
average of two measurements and alerts if temperature difference exceeds
the set maximum differential (Sensor Drift Alert). If a sensor fails, an alert will
be sent and the primary variable will hold working sensor measurement.
Primary Variable
Sensor Average
Secondary Variable
Sensor 1
Tertiary Variable
Sensor 2
Quaternary Variable
Terminal Temperature
Option Code U3
Average temperature with Hot Backup and sensor drift alert – Alarm Mode
Primary Usage
Critical applications, such as safety interlocks and control loops. Outputs the
average of two measurements and alerts if temperature difference exceeds the
set maximum differential (Sensor Drift Alert).
Primary Variable
Sensor Average
Secondary Variable
Sensor 1
Tertiary Variable
Sensor 2
Quaternary Variable
Terminal Temperature
Option Code U4
Two independent sensors
Primary Usage
Used in non-critical applications where the digital output is used
to measure two separate process temperatures.
Primary Variable
Sensor 1
Secondary Variable
Sensor 2
Tertiary Variable
Terminal Temperature
Quaternary Variable
Not Used
Option Code U5
Differential temperature
Primary Usage
The differential temperature of two process temperatures are configured as the
primary variable.
Primary Variable
Differential Temperature
Secondary Variable
Sensor 1
Tertiary Variable
Sensor 2
Quaternary
Variable
Terminal Temperature
Содержание Rosemount
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