inadequate, the datalogger will warn that the card is not being used. However, the CRBasic
program runs anyway and data is stored to SRAM. When a card is inserted later, data
accumulated in the SRAM table is copied to the card.
A microSD card can also facilitate the use of powerup.ini (see
File management via powerup.ini
(p. 43) for more information).
5.5.1 Formatting microSD cards
The datalogger accepts microSD 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. The datalogger formats memory cards as FAT32.
Because of the way the FAT32 card format works, you can avoid long datalogger compile times
with a freshly formatted card by first formatting the new card on a computer, then copying a
small file to the card from the computer, and then deleting the file with the computer. When the
small file is copied to the card, the computer updates a sector on the card that allows the
datalogger program to compile faster. This only needs to be done once when the card is
formatted. If you have the datalogger update the card sector, the first datalogger program
compile with the card can take up to 10 minutes. After that, compile times will be normal.
5.5.2 MicroSD card precautions
Observe the following precautions when using optional memory cards:
l
Before removing a card from the datalogger, disable the card by pressing the Eject button
and wait for the green LED. You then have 15 seconds to remove the card before normal
operations resume.
l
Do not remove a memory card while the drive is active, or data corruption and damage to
the card may result.
l
Prevent data loss by collecting data before sending a program. Sending a program to the
datalogger often erases all data.
5.5.3 Act LED indicator
When the datalogger is powered and a microSD card installed, the Act (Activity) LED will turn on
according to power and program states:
l
Red flash: Card read/write activity
l
Solid green: Formatted card inserted, powered up. This LED also indicates it is OK to
remove card. The Eject button must be pressed before removing a card to allow the
datalogger to store buffered data to the card and then power it off.
l
Solid orange: Error
5. Data memory
42
Summary of Contents for CR1000X
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