Hioki MR8880-20, Instruction Manual

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6.1 Saving & Loading Data
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Chapter 6
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Data in internal buffer 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. 198) 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
following settings to prepare for power outages.
Measure 1
Combined Use with Battery Pack (Option) (p. 32)
Measurement can continue on battery power for a certain period of time if the com-
mercial power supply fails.
Measure 2
Setting Automatic Saving (p. 102)
Data is periodically saved to removable storage. The HiCorder includes a large-
value capacitor to provide power to save the most recent data and close the files
when power fails.
Preparations and Settings 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 dam-
aged.
• If storage media that is not a genuine Hioki CF card or damaged stor-
age media is used, files may fail to close within the allotted time, and
data may be lost.
• Setting [File Protection] to [High] on the System screen enables the
files to be protected in the event of a power outage. However, storage
media is not recognized during the period of approximately three min-
utes after power-on in which files may be inaccessible and could
become corrupted.
See: "File Protection Level Setting" ( p. 198)
Although [CSV(realtime)] saving is possible, data is saved only as text, so
waveforms cannot be displayed later by reloading into the HiCorder or by ap-
plication programs. Note that the recording interval setting is limited.
See: "CSV Format Data" ( p. 102)