Specifications

Section 2. Data Storage and Retrieval
2.3.2.2 Removing Card from CR3000
To remove a card, press the button on the CFM100 or NL115 . The CR3000
will store any buffered data to the card and then power if off. The Status LED
will turn green when it is OK remove the card. Remove the card. The card
will be reactivated after 20 seconds if it is not removed.
The CF card Status LED just above the CF card door is red when the card is
being written to.
Removing a card or removing power from the card while it
is active can cause garbled data and can actually damage
the card. Before switching off the CR3000 power, press
the CFM100 or NL115 button and wait for the green LED.
CAUTION
When the CF card is inserted in a computer, the data files can be copied to
another drive or used directly from the CF card just as one would from any
other disk. In most cases, however, it will be necessary to convert the file
format before using the data.
2.3.2.3 Converting File Format
The CR3000 stores data on the CF card in TOB3 Format. TOB3 is a binary
format that incorporates features to improve reliability of the CF cards. TOB3
allows the accurate determination of each record’s time without the space
required for individual time stamps.
When TOB3 files are converted to another format, the number of records may
be greater or less than the number requested in the data table declaration.
There are always at least two additional frames of data allocated. When the
file is converted these will result in additional records if no lapses occurred. If
more lapses occur than were anticipated, there may be fewer records in the file
than were allocated.
CardConvert software included in PC200, PC400, and LoggerNet will convert
the data on the card to another format.
2.4 Data Format on Computer
The format of the file stored on disk can be either ASCII or Binary depending
on the file type selected in the computer software used to collect the data
(PC200, PC400, LoggerNet).
2.4.1 Header Information
Every data file stored on disk has an ASCII header at the beginning. The
header gives information on the format, datalogger and program used to collect
the data. Figure 2.4.1 is a sample header where the text in the header is a
generic name for the information contained in the header. The entries are
described following the figure.
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