Ahlborn ALMEMO 710 Operating Instructions Manual page 32

10. Data logger
with the internal cycle no data is output to the interface. In order to record data
the memory must have been activated.
In menu ´Data logger 2/4´ select scan mode ´Monitor´.
Failsafe mode
Failsafe 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-
ternal cyclic basis. In this mode the cycle programmed in the device must be
longer than that needed for software scanning. Software scanning keeps reset-
ting the internal cycle with the effect that this cycle is only actually used in the
event of the software scan failing; (in WinControl "safe initialization" must be
switched off). The internal output cycle is started as soon as the WinControl
software starts; it may also have been started previously. When scanning with
the internal cycle no data is output to the interface. In order to record data the
memory must have been activated.
In menu ´Data logger 2/4´ select scan mode ´Failsafe´.
Sleep mode
Sleep mode is suitable for long-term monitoring involving the device long mea-
suring cycles. In energy-saving sleep mode the device switches off completely
after each measuring channel scan (sensors with their own power supply) and
switches on again automatically after the cycle expires - ready for the next mea-
suring channel scan. In this way with just one battery recharge over 100,000
measuring channel scans can be performed; for a cycle lasting 10 minutes this
in theory represents an available runtime of over 2 years.
If in menu ´Data logger 2/4´ the scan mode ´Sleep´ is selected, this will automati-
cally activate ´Save per output cycle´ and automatically deactivate ´Save per
scan cycle´ and ´Output´. If the output cycle is less than 2 minutes, it will be re -
set to this. To ensure that lower-speed sensors also have time to settle and de-
liver correct measured values, a sleep delay time will be set - normally automati-
cally; this parameter must also be saved in the sensor connector.
To enable data recording in sleep mode the following parameters must be set :
1. In menu ´Data logger 2/4´ select scan mode ´Sleep´,
2. In menu ´Data logger 1/4´ enter output cycle of at least 2 minutes,
4. In a measurements menu, start measuring by pressing
The device then switches itself off and as a check the red LED "SLEEP" (5) starts
to flash.
5. In the specified cycle the device switches on automatically, performs one
measuring channel scan, and then switches off again.
6. To terminate sleep mode simply switch on
7. To stop measuring operation
32 ALMEMO ® 710
START
ON
STOP