Offline measurement
6. In the specified cycle the device switches on automatically, performs one
measuring point scan, and then switches off again.
7. To stop the measuring operation press key (2) twice, Function ´
ON
´ and
´
STOP
´.
In this way any number of measuring operations can be performed in sleep
mode up until when sleep mode is deactivated again. With cycles shorter than
two minutes measuring operations are performed automatically in normal
mode.
10.2.2 Measured value memory, internal
Measured data acquisition module ALMEMO
®
809 incorporates an 8-MB flash
memory, sufficient for up to 1,600,000 measured values (depending on the
number of channels and measured value volume). This memory is non-volati-
le; i.e. it retains data intact even in the event of a failure affecting the lithium
battery used to buffer the real-time clock. The system for organizing the mea-
sured value memory has been changed; measured values are now saved in
ASCII and in table format (similar to the system used for interface output).
When a connector's configuration is modified the new configuration is now sa-
ved and, if the linear memory mode has been selected, is assigned a number
(similar to the system used for the memory card) . These 'files' can be indivi-
dually selected and output. The ring memory mode remains an available alter-
native. (see Man. 6.10.13.2) However, if the ring memory mode has been se-
lected, the connector configuration cannot be changed.
The following functions are supported by the internal memory:
- Linear memory mode - multiple connector configurations can be saved.
- Ring memory mode - only one connector configurations can be saved.
- Sleep mode
- Data is output in table format only.
- Selective data output by date only
- Selective data output by number
10.2.3 Memory connector with SD memory card
Another convenient method for data recording is memory connector ZA 1904-
SD with a conventional micro SD memory card. Measured data is written to
the memory card via the plug-in memory connector; this data is saved in stan-
dard FAT16 table format. The memory card can be formatted and its contents
can be read out and / or deleted on any normal PC using any standard card
reader. (see Manual, 6.9.4.2) This data can also be imported into MS-Excel or
into WinControl. The memory connector works in a completely different way to
the device-internal memory; this brings with it not only restrictions but also new
advantages.
Memory connector functions
- Virtually unlimited memory capacity
- With each new connector configuration a new file is created.
ALMEMO
®
809
25
