Specifications

Section 2. Data Storage and Retrieval
Campbell Scientific offers and recommends CF cards manufactured by Silicon
Systems. Silicon Systems’ CF cards are industrial-grade and have passed our
ESD testing. Only industrial-grade CF cards with a storage capacity of 2
Gbytes or less should be used with our products. Refer to the PC/CF Card
Information Application Note for more information.
To install or remove the CFM100 or NL115 module, turn the
CR3000 power off.
NOTE
When a data table is sent to a CF card, the data table 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 for the table size. If the card is
removed, the size of the table in SRAM will be shown.
When a new program is compiled that sends data to the CF card, the CR3000
checks if a card is present and if the card has adequate space for the data
tables. If the card has adequate space, the tables will be allocated and the
CR3000 will start storing data to them. If there is no card or if there is not
enough space, the CR3000 will warn that the card is not being used and will
run the program, storing the data in SRAM only. When a card with enough
available memory is inserted the CR3000 will create the data tables on the card
and store the data that is accumulated in SRAM.
Data stored on cards can be retrieved through a communication link to the
CR3000 or by removing the card and carrying it to a computer. Because of the
popularity of compact flash cards for digital photography, there are many
varieties of compact flash adapters for computers. There are also passive
adapters that allow a compact flash card to be plugged into the PCMCIA card
slot available on many laptops. The PCMCIA interface is much faster than the
communication link. With large files transferring the CF card to the computer
may be faster than collecting the data over the link.
The CR3000 uses either the FAT or the FAT 32 format for the CF cards.
Cards can be formatted in a PC or in the CR3000. See the CFM100 or NL115
manual for additional information.
To prevent losing data, collect data from the CF card
before sending the datalogger a new or modified program.
When a program is sent to the datalogger using the Send
button in the Connect screen of LoggerNet or PC400, an
attribute is sent along with the program that commands the
datalogger to erase all data on the CF card from the
currently running program.
CAUTION
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