Pyromation T82 - Manual (Page 82)

Operating menu and parameter description T82
82
"HART output" submenu
Assign current output (PV)
Navigation 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)
• Device temperature
• 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 parameter. With
temperature-dependent switching, it is possible to combine 2 sensors that offer advantages in
different temperature ranges.
Factory settings Sensor 1
PV
Navigation Expert ® Communication ® HART output ® PV
Description Use this function to display the primary HART value.
Assign SV
Navigation Expert ® Communication ® HART output ® Assign SV
Description Use this function to assign a measured variable to the secondary HART value (SV).
Options: See Assign current output (PV) parameter, (® ä 82)
Factory settings Device temperature
SV