Ahlborn ALMEMO 2590-2 Operating Instructions Manual page 43


With the selection of the Sleep mode after confirmation of a query
display all necessary parameters are possibly configured!
For data recording in sleep mode please perform the following steps :
1. Enter a cycle lasting at least 2 minutes
2. Activate saving in this cycle :
3. Select scan mode :
4. Sleep mode program (see 8.5):
5. In the menu
The device should then display
It should then switch off again and as verification the LED ´SLEEP´ (4) flashes.
Only the red lamp ´SLEEP´ at the top of the window flashes rhythmically.
6. In the specified cycle the instrument switches
on automatically, performs one measuring
point scan, and then switches off again.
7. To quit sleep mode press
8. To cancel the measuring operation press

A measuring operation can be started in sleep mode using the start
time (see 11.5.9); however, in sleep mode it cannot be stopped using
the end time and measuring duration.
Monitor mode:
If a data logger being operated on a cyclic basis is to be monitored occasional-
ly by computer the new ´monitor mode´ should be used. Internal cyclic scan-
ning is not influenced in any way by software scanning; (in Win-Control ´safe
initialization´ must be deactivated).
The internal cycle is started with the software start; it may also have been start-
ed previously. Scanning by the internal cycle outputs no data to the interface.
To accept data the memory must have been activated.
In the function Mode program the variant Monitor :
Fail-safe mode:
Fail-safe mode is suitable where purely software-based scanning is used
merely to ensure in the event of computer failure that scanning continues on an
internal cyclic basis. In this mode the cycle programmed in the device must be
larger than that needed for software scanning (e.g. device cycle 20s, software
cycle 10s). Software scanning keeps resetting the internal cycle with the effect
that this cycle is only actually used as and when software scanning fails; (here
too in Win-Control ´safe initialization´ must be deactivated).
The internal cycle is started with the start of the Win-Control software; it may
also have been started previously. Scanning by the internal cycle outputs no
data to the interface. To accept data the memory must have been activated.
In the function Mode program the variant Fail-safe :
start measuring operation by pressing :
Data logger
Data logger functions
Cycle : 00:05:00 S
Saving to memory :
Saving to memory : Ø
.
Sleep On
<STOP>
<STOP>
ALMEMO ®
Ø Mode:Normal
Mode::Normal
Sleep
<START>
Mode:Monitor
Mode:Fail-saf e
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