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ning 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 scanning
Fail-safe
Cyclic scanning by the PC, after any failure affecting the internal cy-
cle
Sleep mode
For long-term monitoring involving large measuring cycles the system can also
be operated in sleep mode. In energy-saving sleep mode the measuring instru-
ment is completely switched off after each measuring point scan please note
when using sensors with power supply) and switched on again automatically af-
ter the cycle expires ready for the next measuring point scan. In this way with
just one set of batteries or one battery recharge up to 15000 measuring point
scans can be performed; for a cycle lasting 10 minutes this represents a mea-
suring capability of over 100 days.
For data recording in sleep mode go to the menu
take the following steps :
1. Enter a cycle lasting at least 2 minutes
2. Activate saving in this cycle
3. Select sleep mode
4. To switch sleep mode on press
5. In a measuring menu start a measuring operation
The device should then display
The display then switches off; the LED ´SLEEP´ (2) flashes rhythmically on
and off as verification.
6. In the specified cycle the instrument switches on automatically, performs
one measuring point scan, and then switches off again.
7. To terminate sleep mode press
8. To terminate the measuring operation press
The start or stop through start and end time or through limit values
is, on principle, not possible in sleep mode and, therefore, must be
switched off!
Monitor mode
This new "monitor mode" should be used when a data logger, being operated
on a cyclic basis, is to be monitored occasionally by 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 and when 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 -
Measured value memory
Recording to memory
Cycle :
Saving:
Saving: Ø
<ON>
by pressing
<START>
Sleep On
LED ´SLEEP´ (2) flashes
<ON>
<STOP>
ALMEMO
and
00:05:00 S
Ø
Normal: -
Sleep:
-
Sleep:
Ø
.
®
5690-2M
59
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