User guide

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2.6 MEMORY CARDS
The memory cards used are standard CompactFlash™ cards. We recommend the use of
Sandisk™ CompactFlash™ cards. The cards are keyed and can only go into the recorder
right side up. The largest capacity card that can be accommodated is 2 Gigabytes.
2.6.1 Care of the Data Cards
Do not expose the cards to direct sunlight or extremes of temperature for any length of
time. Do not expose to moisture. Do not bend or twist. Avoid high static discharge.
When mailing card use a suitable package to avoid postal damage. When transporting,
use an anti-static bag or the plastic enclosure in which the card is supplied.
2.6.2 Card Storage Capacity and Data Type
Depending on what else is stored on the card (e.g. configurations files, other data files),
data storage capacity can be roughly calculated by the following formulas:
Number of samples is card size divided by 4.4. The time that it will take to fill a card is
roughly the number of samples divided by the sample rate. For example, a 32MB card
will hold roughly 32,000,000 divided by 4.4 = 7,272,727 samples. At 5 samples per
second this is 1,454,545 seconds or 404 hours or approximately 16.8 days.
If you show the Card Status window (MENU - CARD STATUS), it will indicate how much
time is left on the card. It also displays the current Filename that is being used for recording.
The files on the card are in DOS standard format and can be managed on any
Windows™ based machine with a CompactFlash™ reader - internal or external. The
content of the files is in proprietary binary format and requires special software to read
the data. All units are supplied with the Navigator Lite Software, which allows the data
to be exported to Excel.
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