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drEd
Characteristics of the redundancy switching (backup)
[OFF] Fault in the electronics:
Analogue signal at fault value*
Both sensor elements defective: Analogue signal at fault value*
One sensor element defective: Analogue signal at fault value*
[drW] and [drA] exceeded:
Analogue signal corresponds to the
measured temperature�
[On]
Fault in the electronics:
Analogue signal at fault value*
Both sensor elements defective: Analogue signal at fault value*
One sensor element defective: Analogue signal corresponds to the
temperature of the 2nd measuring
element (backup).
[drW] and [drA]
exceeded:
Analogue signal corresponds to the
measured temperature�
[Ondr] Fault in the electronics:
Analogue signal at fault value*
Both sensor elements defective: Analogue signal at fault value*
One sensor element defective: Analogue signal corresponds to the
temperature of the 2nd measuring
element (backup).
[drW] exceeded:
Analogue signal corresponds to the
measured temperature�
[drA] exceeded:
Analogue signal at fault value*
*corresponds to the setting of the parameter FOU
ddr
Delay of the drift detection
By means of this function short exceeding of the drift thresholds can be filtered out
(e.g. in case of large temperature gradients).
ddr value = time for which a drift value must be above the warning / alarm thresh-
old (drW, drA) in order to activate the diagnostic output.
Setting range: 0 ��� 300 minutes, in steps of 0�5 minutes�
If the operating voltage is interrupted during the delay time, the unit stores the
remaining time� If the drift persists after re-activation of the operating voltage, the
delay becomes active again until the remaining time has elapsed�
drW
Drift warning threshold
Value at which OUT1 provides a warning message according to the configuration�
Setting range: 0�2 ��� 5 °C / 0�4 ��� 9 °F, in steps of 0�05 °C / 0�1 °F�
drA
Drift alarm threshold
Value at which OUT1 provides an alarm message according to the configuration�
Setting range: 0�2 ��� 5 °C / 0�4 ��� 9 °F, in steps of 0�05 °C / 0�1 °F�
