Heidolph Hei-VAP Expert Operating Instructions Manual page 119

Commissioning
➜
The recorded values show when a process was started and stopped again.
In the event of a power interruption or when the device is switched
off during the current data recording, the recording process is
aborted and the corresponding entry marked with "(!)". The
displayed data set contains the recorded process data that was
recorded up to the power interruption:
In the Datalog export file, the corresponding file names are also
given the addition "(!)" before the file extension:
"(!).csv", or "(!).json".
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