USER MANUAL SAGA
Page 31 of 47
Recovery of lost data
In measurement scenarios where data could be lost, for example in a portable set
up over Wi-Fi, the device has a back-up functionality that allows to retrieve lost data
after the measurement session ends.
The Docking Station keeps track of any data that is missed in the status channel.
Data that is missed is marked as ‘Dummy data’. The Data Recorder stores all
measurement data on the on-board memory for the duration of the measurement
session. After the session, ‘Dummy data’ can be replaced by the actual data from
the on-board memory.
A measurement session is ended when the user stops the session by hand or when
the Data Recorder stops recording on memory when the memory is full, or when the
batteries are depleted.
In case the measurement is interrupted because the data acquisition PC or docking
station shuts down because of a major power cut or user error, the Data Recorder
may continue to acquire data on its on-board memory. The recording can then only
be stopped by pressing the Recording button and Event marker button for 4 seconds.
The recorded data can be subsequently downloaded when the Docking Station and
Data Recorder connection is restored.
Because data loss in stationary setups is unlikely, it is not recommended to log all
measurement data on the on-board memory. This will generate large files which are
in many cases useless. In rare cases where external factors such as a power cut or
accidental disconnection of the optical fiber is imminent and data loss is
unacceptable, the operator should take appropriate actions to minimize these
external factors.
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