Hioki 8423 - Replacing a CF Card During Measurement; File Protection During Power Outage

3.6 Using a CF Card
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Chapter 3 Setting Up the Instrument
While data is being saved to a CF card in real time, you can replace the CF card
without stopping measurement.
1. Open the CF card slot cover.
2. Confirm that the CF card access LED is off, and then eject the CF card.
3. Insert a CF card with sufficient available space, and then close the cover.
The instrument has a large built-in capacitor that processes the ending of files
when the power is switched off or there is a power outage. This greatly reduces
the risk of files being damage by an unexpected power outage.
3.6.3 Replacing a CF Card during Measurement
As the CF card is sensitive to static electricity, damage to the CF card or wrong
operations by the HiLogger may occur due to static electricity. Please be careful
when handling it.
• The CF card access LED may sometimes be lit red immediately after you open
the cover, because the CF card is being processed. Ejecting the card in such a
state will result in the files of the CF card being damaged. Always make sure
the LED is off before ejecting a CF card.
• Be sure to close the cover after inserting a CF card. Measurement data will not
be saved if the cover is not closed.
• If the CF card is not replaced within 5 minutes, the data of the internal memory
may overflow and the measurement data may not be saved.
• If measurement ends while no CF card is inserted, the data up until the end of
measurement will not be saved even if you insert a CF card afterwards. In
such a case, you can use the HTTP function to extract the data in the instru-
ment while the instrument is connected to the LAN. See "Chapter 11 Commu-
nications (HTTP/FTP)" (p. 209).
3.6.4 File Protection during Power Outage
A CF card cannot be accessed for 30 seconds immediately after the power is
turned on because the large capacitor is being charged.