Pyromation T82 - Manual (Page 53)

T82 Operating menu and parameter description
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Navigation Setup ® RJ preset value
Expert ® Sensor ® Sensor n ® RJ preset value
Prerequisite The Fixed value parameter must be set if the Reference junction n option is selected.
Description Use this function to define the fixed preset value for temperature compensation.
User input –50 to +85 °C
Factory settings 0.00
Assign current output (PV)
Navigation Setup ® Assign current output (PV)
Expert ® Communication ® HART output ® Assign current output (PV)
Description Use this function to assign a measured variable to the primary HART ® value (PV).
Options: • Sensor 1 (measured value)
• Sensor 2 (measured value)
• Average of the two measured values: 0.5 x (SV1+SV2)
• Difference between sensor 1 and sensor 2: SV1-SV2
• Sensor 1 (backup sensor 2): If sensor 1 fails, the value of sensor 2 automatically becomes the
primary HART ® value (PV): sensor 1 (OR sensor 2)
• Sensor switching: If the value exceeds the configured threshold value T for sensor 1, the
measured value of sensor 2 becomes the primary HART ® value (PV). The system switches back
to sensor 1 when the measured value of sensor 1 is at least 2 K below T: sensor 1 (sensor 2, if
sensor 1 > T)
• Average: 0.5 x (SV1+SV2) with backup (measured value of sensor 1 or sensor 2 in the event of
a sensor error in the other sensor)
The threshold value can be set with the Sensor switch set point (® ä 58) parameter.
With temperature-dependent switching, it is possible to combine 2 sensors that offer
advantages in different temperature ranges.
Factory settings Sensor 1
Lower range value
Navigation Setup ® Lower range value
Expert ® Output ® Lower range value
Description Use this function to assign a measured value to the current value 4 mA.
The set point that can be set depends on the sensor type used in the Sensor type (® ä 51)
parameter and the measured variable assigned in the Assign current output (PV)
parameter.
User input Depends on the sensor type and the setting for "Assign current output (PV)."
Factory settings 0