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10.2.3
Memory connector with memory card
Another convenient feature for data recording without option S is provided by
the newly developed memory connector (ZA 1904-SD) with a conventional
memory card. The memory card measured data is written to it via the memory
connector in table mode and in standard FAT16 format. The SD card can be
formatted and its contents can be read and deleted via any normal PC using
any card reader; see Manual 6.9.4.2. Measured data can be imported into MS-
Excel or into Win-Control, the accompanying measured value software. The
memory connector works in a completely different way to the device-internal
memory; this brings both restrictions and advantages.
Functions of the memory connector with memory card:
Virtually unlimited memory capacity
With each new sensor configuration a new file is created.
No ring memory recording
Sleep mode
Data can be evaluated using any reader on site and elsewhere.
Very high-speed data transfer via the reader
Data recording and output in table format only
Via the ALMEMO ® device itself only the last file can be read.
No selective data output according to date and time or by number
The memory connector with the memory card can be connected at socket A2
(2f); it is recognized automatically. If the external memory is connected at the
start of any measuring operation, it will be used. In the course of the measur-
ing operation it must not be unplugged; this would cause temporarily buffered
measured values to be lost.
Before starting any measuring operation you can enter an 8-character file
name (see Ch 11). In the absence of a user-assigned file name, the default
name ´ALMEMO.001´ or the name most recently used will be suggested auto-
matically. So long as the connector configuration is not altered, you can save
several measuring operations, either manually or cyclically, also with numerical
assignment, all in the same file.
If, however, the connector configuration has been changed since the most
recent measuring operation and if no new file name has been programmed,
then a new file is always created and in so doing the index in the file name
extension is automatically incremented by 1, e.g. ´ALMEMO.002´. Similarly, if the
file name entered already exists, then a new file will be created with the same
file name prefix but with a new index.
Please note : If you clear the memory the card will be reformatted
! (interface command C04)
Using a SD card to perform measuring operations at a rate of 100
mops in mains mode may - if the housing is not properly grounded -
lead to measuring errors. In these circumstances we recommend
that the ground socket on the device be connected to protective
10. Measured data acquisition
27
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