Ahlborn ALMEMO 204, Operating Instructions Manual

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14. Functions menus
Sleep mode
Running the device in sleep mode is suitable for long-term monitoring involving
long measuring cycles. In energy-saving sleep mode the device switches off
completely after each measuring point scan: (for sensors with their own power
supply a wakeup delay can be set); sleep mode switches on again automatically
after the cycle expires - ready for the next measuring point scan. In this way with
just one set of batteries or one battery recharge over 15,000 measuring point
scans can be performed; for a cycle lasting 10 minutes this represents an avail-
able runtime of over 100 days.
When sleep mode is selected (subject to a check window being con-
firmed), all necessary parameters can be configured.
For data recording in sleep mode please perform the following steps :
1. Enter a cycle lasting at least two minutes
Cycles: 00:05:00
2. Activate saving to memory in the cycle
Save: Ø Mode:Normal
3. Select scan mode
Save: Ø Mode:: Normall
4. Program sleep mode s. 9.5 Mode:
5. In the menu
Data logger
start measuring operation by pressing
<START>
The device should then display
Sleep On
The device then switches off and the only visible activity
is the flashing red at the top of the display LED ´
SLEEP
´ (4) flashes
6. In the specified cycle the device switches on
automatically, performs one measuring point
scan, and then switches off again
7. To quit sleep mode press
<ON>
8. To terminate the measuring operation press
<STOP>
A measuring operation can be started in sleep mode using the start
time; however, in sleep mode it cannot be stopped using the end time
and fixed measuring period (s. 14.5.9).
Monitor mode:
The new monitor mode should be used if a data logger, being operated on a
cyclic basis, is to be monitored occasionally by the computer. Internal cyclic
scanning is not influenced in any way by software scanning. (In Win-Control
'safe initialization' must be switched off.)
The internal cycle is started as soon as the software starts; it may also have
been started previously. When scanning with the internal cycle no data is out-
put to the interface. In order to record data the memory must have been acti-
vated.
n the 'mode' function the 'monitor' variant must be programmed
Mode:Monitor
Fail-save mode:
Fail-safe mode is suitable when scanning is purely software-based; it merely
ensures, in the event of computer failure, that scanning will continue on an in-
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Sleep