Section 8. Operation
434
A: Compressing a file has the potential of significantly reducing its size. Actual
reduction depends primarily on the number and proximity of redundant blocks of
information in the file. A reduction in file size means fewer bytes are transferred
when sending a file to a datalogger. Compression can reduce transfer times
significantly over slow or high-latency links, and can reduce line charges when
using pay-by-the-byte data plans. Compression is of particular benefit when
transmitting programs or OSs over low-baud rate terrestrial radio, satellite, or
restricted cellular-data plans.
Q: Does my CR3000 support Gzip?
A: Version 25 of the standard CR3000 operating system supports receipt of Gzip
compressed program files and OSs.
Q: How do I Gzip a program or operating system?
A: Many utilities are available for the creation of a Gzip file. This document
specifically addresses the use of 7-Zip File Manager. 7-Zip is a free, open source,
software utility compatible with Windows
®
. Download and installation
instructions are available at http://www.7-zip.org/. Once 7-Zip is installed,
creating a Gzip file is as four-step process:
a) Open 7-Zip.
b) Drag and drop the program or operating system you wish to compress onto the
open window.
c) When prompted, set the archive format to “Gzip”.
Summary of Contents for CR3000 Micrologger
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Page 485: ...Section 8 Operation 485 8 11 2 Data Display FIGURE 110 Keyboard and Display Displaying Data ...
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