--
ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY
QNA-303 --
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8
4.- DATA COLLECTION IN MEMORY (AUTOMATIC MODE)
The
QNA-303
is equipped with an internal clock for both date and time that
permits the automatic data recording process in memory to be set (available capacity
according to the model) at regular time periods.
So, the different information recorded by the
QNA-303
into its on-board
memory is distributed between three file types:
•
*.STD files: This file contains all values which are periodically
recorded (voltage, frequency, voltage harmonic distortion and the
harmonic content).
•
*.EVE files: File which contains all incidents referred to the
QNA-303
itself (file readout, setup modification, memory erasure, power
supply on/off, battery on/off...).
•
*.EVQ: This file contains all events observed in the electric power
supply (voltage dips, voltage swells, interruptions) together with
some supplementary information about these events (instant of the
event occurrence, maximum/minimum voltage, average voltage,...).
The
QNA-303
is equipped with an on-board rotary memory for data collection;
which means that once this memory is full, new values overwrite oldest ones.
Therefore, if no data is wanted to be lost, data must be retrieved from the memory
before oldest values will be overwritten.
