6.1 About Saving and Loading Data
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Chapter 6 Saving & Loading Data
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Data in internal memory is retained for about 30 minutes after power-off.
If power is off for more than 30 minutes, the data is lost.
Also, when Auto-Resume (p. 152) is enabled, measurement resumes automatically
when power is restored, so previous measurement data is deleted.
To avoid data loss in such cases during long-term measurement, we recommend the fol-
lowing settings to prepare for power outages.
•Connect the (optional) battery pack before starting (p. 30)
Measurement can continue on battery power when mains power is lost.
•Configure Auto Save beforehand (save [
Waveform(realtime)], P.125 )
Data is periodically saved to removable storage. The HiLogger includes a large-value
capacitor to provide power to save the most recent data and close the files when
power fails.
Although [CSV(realtime)] saving is possible, data is saved only as text, so waveforms cannot
be displayed later by reloading into the HiLogger or by application programs.
Note that the
recording interval setting is limited (p. 125)
.
What happens to data in a power outage?
Preparation for power outages during long-term measurements
If power is lost within about three minutes after power-on, files on the
removable storage may be corrupted, and the device could be damaged.
If a damaged storage device is used, files may fail to close within the allot-
ted time, and data may be lost.
When [F
ile Protection:High] is selected on the System screen, storage
media is not recognized for three minutes after power-on, during which
files may be inaccessible and could become corrupted.
See: "File Protection Level Setting" (p .153)
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