Campbell CR3000 Micrologger, Руководство оператора

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Section 5. Overview
81
5.3.4 Memory Card (CRD: Drive) — Overview
Related Topics:
• Memory Card (CRD: Drive) — Overview
(p. 81)
• Memory Card (CRD: Drive) — Details
(p. 447)
• Memory Cards and Record Numbers
(p. 453)
• Data Output: Writing High-Frequency Data to Memory Cards
(p. 217)
• File System Errors
(p. 464)
• Data Storage Devices — List
(p. 613)
• Data File Format Examples
(p. 450)
• Data Storage Drives Table
(p. 445)
Caution Observe the following precautions when using memory cards:
•
Before removing a card from the card module, or removing the card
module from the CR3000, disable the card by pressing the Initiate
Removal button (NOT the eject button), wait for the green light.
•
Do not remove a memory card while the drive is active or data
corruption and damage to the card may result.
•
Prevent data loss by collecting data before sending a program from the
memory card to the CR3000. Sending a program from the card to the
CR3000 often erases all data.
Data stored on a memory card are collected to a PC through a comms link with
the CR3000 or by removing the card and collecting it directly using a third-party
adapter on a PC.
5.3.4.1 Comms
The CR3000 accesses data on the card as needed to fill data-collection requests
initiated with the datalogger support software Collect
(p. 532)
command. An
alternative, if care is taken, is to collect data in binary form. Binary data are
collected using the datalogger support software File Control | Retrieve
(p. 539)
command. Before collecting data this way, stop the CR3000 program to ensure
data are not written to the card while data are retrieved, or data will be corrupted.
5.3.4.2 Direct with Adapter to PC
Data transfer is much faster through an adapter than through a comm link. This
speed difference is especially noticeable with large files.
The format of data files collected by direct connection of the card with a PC may
be different than the standard Campbell Scientific data file formats (binary —
format depends on the instruction used to write to the card). See section Data
File Format Examples
(p. 450)
for more information. Binary data files can be
converted to a Campbell Scientific format using CardConvert
(p. 531)
software.