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2.8 Micro SD Card
Fig. 2-4 Slot for the Micro SD card
26) The AMS-8061 is a self-contained instrument which does not require
any external device such as mass-storage memory. Indeed, its built-in
memory is large enough to store data for a year and a half or longer than
three months with a rate of 1 minute.
However, the AMS-8061 supports Micro SD Card. It is solely intended for
backing up data when no other way is accessible among the many present
(RS232, USB, FTP, Ethernet and Modem). Therefore, for no reason should
a Micro SD Card be left in the slot permanently or for a long time.
Moreover, GPS shares the same Micro SD Card port thus, when an Micro
SD Card is present, the GPS is disabled.
The station is able to accept a Micro SD card with 16 GB maximum
capacity
Before removing or inserting the Micro SD card, switch off the
AMS-8061.
To install the Micro SD Card:
- Slide the card into the slot
- Use your finger to gently push the card in until it stops and clicks into
place.
To remove the Micro SD Card:
- Use your finger to gently push the card in until it stops and clicks into
place.
- Remove the card from the slot
In order to be used, an Micro SD Card should be first formatted, either FAT
or FAT32, and then have a file named "SD8061.SD1"in the root .
The size of this file, "SD8061.SD1", determines the number of record will
be backed-up on the Micro SD card.
According to the § 5.8 "D61 Structure, Download description", each record
takes 352 bytes. Thus to store N records the required size is 352 x N Bytes.
For example, to back up 1000 records it is necessary to make the file
"SDCOPY.SD9" whose size is 352000 bytes. The data stored in SD CARD
are in binary format; the download description is explained on §5.8
chapter".
The AMS 8061, as soon as it detects the presence of an Micro SD Card,
tries to open the file "SD8061.SD1" and, if successful, tries writing the last
<size_of_file> divided by 352 records having thus the most recent ones. In
the above example it would write the most recent 1000 records.
It is important to keep in mind that records will be aligned to last record-
most recent record.
Installation and use
2-19
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