VOLTCRAFT 1000BASIC DE Operating Instructions Manual page 42

The data are saved if you disconnect it from the mains
socket. The data can then be read easily.
Always keep in mind to reset the data when performing a
new measurement (e.g. with a new consumer).
Notes on the calculation of the prediction:
During the first hour after the start of the recordings (in the period
from 0 – 59 minutes), the prediction is estimated based on the load
connected. Therefore, the predicted values shown can change
during this time.
During the second hour, the prediction is estimated based on
the energy consumption during the first hour (0:00 to 0:59), (the
predicted value remains constant).
During the third hour, the prediction is estimated based on the
energy consumption during the first hour (01:00 to 01:59) (the
predicted value remains constant) and so on.
At the end of the first day, the prediction is calculated and shown
based on the energy consumption of the first day (0:00 to 23:59).
During the following days, the prediction is always calculated
based on energy consumption of the previous day.
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