Operating menu and parameter description iTEMP TMT82
108 Endress+Hauser
Description Use this function to assign a measured variable to slots 0 to 3.
This assignment is only relevant for the burst mode. The measured variables are
assigned to the 4 HART variables (PV, SV, TV, QV) in the HART output → 104
menu.
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 if the measured value of sensor 1 is at least 2 K below T:
sensor 1 (sensor 2, if sensor 1 > T)
The threshold value can be set with the Sensor switching limit value parameter.
With temperature-dependent switching, it is possible to combine 2 sensors that offer
advantages in different temperature ranges.
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)
Factory setting • Burst variable slot 0: sensor 1
• Burst variable slot 1: device temperature
• Burst variable slot 2: sensor 1
• Burst variable slot 3: sensor 1
Burst trigger mode
Navigation Expert → Communication → Burst configuration → Burst trigger mode
Prerequisite This parameter can only be selected if the Burst mode option is enabled.
Description Use this function to select the event that triggers burst message X.
• Continuous:
The message is triggered in a time-controlled manner, at least observing the time
interval defined in the "Burst min period X" parameter.
• Window:
The message is triggered if the specified measured value has changed by the value
defined in the "Burst trigger level X" parameter.
• Rising:
The message is triggered if the specified measured value exceeds the value in the
"Burst trigger level X" parameter.
• Falling:
The message is triggered if the specified measured value falls below the value in
the "Burst trigger level X" parameter.
• On change:
The message is triggered if a measured value of the message changes.
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