wtw DIQ/S 282, Operating Manual, Page: 162 / 186

What to do if ... DIQ/S 28X
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If an IQ sensor is connected to the system when an inactive dataset is present,
the following cases are possible:
The maximum number of datasets (active and inactive datasets) for
IQ sensors is limited to 2 in the IQ S
ENSOR
N
ET
system DIQ/S 284,
to 4 in the IQ S
ENSOR
N
ET
system DIQ/S 282.
When this number is reached, no further IQ sensor can be installed.
If necessary, an inactive dataset has to be erased to make an exten-
sion possible.
The current calibration data of the IQ sensor is always stored in the
sensor. If an IQ sensor is connected that is ready for operation and
calibrated, this can be used immediately without the need for recal-
ibration.
To erase inactive datasets, see section 5.4.3.
Case 1:
The serial number of the IQ sensor
is identical with the serial number of
an inactive dataset. The connected IQ sensor is automat-
ically assigned to the inactive dataset
and starts to operate again.
Example: Maintenance or repair.
This mechanism ensures that all
IQ sensors retain their settings and
links if an IQ sensor was removed for
maintenance, or if the system was
temporarily switched off.