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If free space is less than... prevents triggered acquisition from leaving less space than the amount you specify
here.
In the box Possible measurement duration, an estimate of the measurement duration based on the current
settings is displayed. Additionally, the data volume to be expected based on the triggers set is indicated, which
also serves to estimate the maximum measurement duration.
When the option Overwrite oldest data.. is activated, this option should be set to Use available space.
Note
Calculation based on the actually free memory on the Flash-card is only performed if the
measurement device is connected. If there is no connection yet, a memory card 2 GB in size
is assumed.
Some foresight must be exercised for correctly saving data to the hard drive. For instance,
when the drive is almost full, it must be ensured that all data still to be accumulated on all
channels are saved all the way up to the measurement's completion. In a configuration with
the maximum channel count, however, up to 4 MByte of memory on the hard drive may
remain reserved.
In the memory storage, up to 500 measurement intervals can be managed, (if there are
more, then accessing and validation can cause problems when saving data).
In consequence, after a time of 500 x intervals, the oldest data are deleted. Which means
with daily intervals, after 1.4 years, and with 2-hour intervals, after 6 weeks. Measurements
according to standards, either daily or 12-hour intervals are recommended.
Operation modes and settings
Power Quality Recorder SICAM Q80 7KG8080, System manual
E50417-H1076-C420-A2, Release 12.01.2015
61
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