Ahlborn ALMEMO 204, Operating Instructions Manual

Page: 41 / 72

Data logger functions
14.5.7 Scanning configuration
The following menu, accessible by pressing key
< ►F > , first shows the total memory capacity
of the SD card being used. The functions ' Out-
put cycle ' (16.7.3) , ' Scan cycle ' (16.7.2) , and
' Sampling rate '
(16.7.1)
can be used to define
exactly how data from standard and D7 sensors
should be scanned and saved to memory. Here
all settings are listed. The way in which saving-
to-memory is activated will affect the resulting 'save-to-memory cycle'
(s. 14.5.5)
Output cycle with save-to-memory activation
For a relatively slow (one second up) cyclic saving of measured values from all
sensors the
Output cycle
with saving-to-memory activated should be used. If
all channels do not appear every time in the period provided, oversampling can
be enabled. As soon as an operation is started the cycle timer should then be
seen counting down until the next cycle.
Enter the
cycle in format ´hh:mm:ss´ s. 16.7.3:
Output cycle: 00:01:00 s U
Clear the cycle and end current scan
<CLR>
00:00:00 s U
Function ' save-to-memory activation' in the output cycle Save: -
Saving to memory activated (default setting):
<ON>
Ø
Switching off the saving function
<OFF>
-
Allow oversampling
Oversampling:-
For quicker processes, in particular with D7 sensors, saving-to-memory should
be activated at the scan cycle. For standard sensors the speed is prescribed
by the sampling rate; for D7 sensors it is prescribed via the minimum actual
measuring duration.
Select scan cycle s. 16.7.2:
Scan cycle: 00.005 s
Switch saving OFF Save: -
Switch saving ON
<ON> Ø
Switch output OFF
<OFF>
Output: -
Switch output ON
<ON>
Output: Ø
Enter sampling rate s. 16.7.1:
Sampling rate: 10 mops
14.5.8 Scan mode
For automatic data logger operation and / or measured value scanning by the
computer there are four scan modes available.
Normal Internal cycle or cyclic scanning by the computer
Sleep Internal cycle only, automatically switching off, for long-term monitoring
Monitor Internal cycle, not disturbed by computer scans
Fail-safe Cyclic scanning by the PC; after any failure, an internal cycles
Function 'scan mode' :
Scan mode
: Normal
Set scan mode s. 9.5 or by means of key:
<SET>
ALMEMO ® 204 41
Memory Ext.: 514,41 MB
Output cycle: 00:01:00 s U
Save: - Oversampling:-
Scancycle: 00.002 s
Save: Ø Output: -
Sampling rate: 10 M/s
Scan mode: Normal
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