ZES ZIMMER LMG450, Руководство пользователя

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Logging of values to drives, printer and interfaces LMG450
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11.6 Storage media
Storage media are used to store single or periodic measuring data. The data format is equal to
the data format of the serial or parallel interface. But this data are written immediately and
evaluated later on.
Equivalent to a screen dump to a printer you can make a screen shot and store it in the popular
PCX file format.
The LMG450 can have either a memory card drive or a floppy disk drive
11.6.1 Floppy disk drive
The optional floppy disk drive is a PC compatible 3 1/2“ drive for 1.44 Mbytes disks.
The file format is MSDOS (FAT) format. So you can read it with each PC with an Microsoft
OS.
Floppy disk is a very good medium for data transfer to a PC if you want to evaluate the
measured data afterwards. The disadvantage is the slow data transfer and the medium storage
capacity. The medium transfer rate is just about 20kbyte per second, if you use a blank,
formatted disk.
If you want to store harmonic values you get about 100 harmonics for 4 channels for each
measuring cycle. That are 400 values which take about 5000 characters in storage. At 200ms
cycle time you have about 25kbyte per second! In this case it might be better to use a memory
card drive.
11.6.2 Memory card drive
Also the memory card drives use the MSDOS (FAT) format. But they are much faster. And
you can get memory cards with several Mbytes capacity.
A big advantage of memory cards is the immunity against electromagnetic distortions.
If you have a laptop with PCMCIA card (equal to PC card) drive you can read the memory
card directly. For other PCs you can use external drives
11.6.2.1 Reading memory cards with a laptop
The used memory cards are SRAM cards according to the PCCard standard (identical to
PCMCIA). On some laptops the memory card reader has to be configured first, to read
memory cards. Please ask your computer supplier for details and check the user manual of the
memory card reader.