Section 8. Operation
448
Devices — List
(p. 613).
Purchasing industrial grade memory cards from Campbell
Scientific is recommended. Use of consumer grade cards substantially increases
the risk of data loss.
Caution Use care when inserting or removing memory cards.
Removing a card from the module while it is being written to can cause
data corruption or damage the card. Before removing the card, press the
eject button and wait for the LED to indicate that the card is disabled. You
then have 15 seconds to pull the card before normal operations resume.
To prevent losing data, collect data from the memory card before sending
a program to the datalogger. When a program is sent to the datalogger
all data on the memory card may be erased.
Campbell Scientific CF card modules connect to the CR3000 peripheral port.
Each has a slot for Type I or Type II CF cards .A maximum of 30 data tables can
be created on a memory card.
Note CardConvert software, included with mid- and top-level datalogger
support software
(p. 614),
converts binary card data to the standard
Campbell Scientific data format.
When a data table is sent to a memory card, a data table of the same name in
SRAM is used as a buffer for transferring data to the card. When the card is
present, the Status table will show the size of the table on the card. If the card is
removed, the size of the table in SRAM is shown.
When a new program is compiled that sends data to the memory card, the CR3000
checks if a card is present and if the card has adequate space for the data tables. If
no card is present, or if space is inadequate, the CR3000 will warn that the card is
not being used. However, the CRBasic program runs anyway and data are stored
to SRAM. When a card is inserted later, data accumulated in the SRAM table are
copied to the card.
Formatting Memory Cards
The CR3000 accepts memory cards formatted as FAT16 or FAT32; however,
FAT32 is recommended. Otherwise, some functionality, such as the ability to
manage large numbers of files (>254) is lost. Older CR3000 operating systems
formatted cards as FAT16 or FAT32. Newer operating systems always format
cards as FAT32.
Because of the way the FAT32 card format works, you can avoid long CR3000
compile times with a freshly formatted card by first formatting the new card on a
PC, then copy a small file to the card from the PC, and then delete the file with
the PC. When the small file is copied to the card, the PC updates a sector on the
card that which allows the CR3000 program to compile faster. This only needs to
be done once when the card is formatted. If you have the CR3000 update the card
sector, the first CR3000 program compile with the card can take as long as 30
minutes. After that, compile times will be normal.
Summary of Contents for CR3000 Micrologger
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Page 485: ...Section 8 Operation 485 8 11 2 Data Display FIGURE 110 Keyboard and Display Displaying Data ...
Page 487: ...Section 8 Operation 487 FIGURE 112 CR1000KD Real Time Custom ...
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