Reference Manual
00809-0100-4021, Rev FB
August 2011
A-19
Rosemount 3144P
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
Option Code U6
Average Temperature
Primary Usage When average measurement of two different process temperatures is required.If a sensor fails, an alert will
be sent and the primary variable will hold the measurement of the working sensor.
Primary Variable Sensor Average
Secondary Variable Sensor 1
Tertiary Variable Sensor 2
Quaternary Variable Terminal Temperature
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