Ahlborn ALMEMO 8590-9, Руководство по эксплуатации

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9. Measured data acquisition
19
9.2.1 Sleep mode
For long-term monitoring involving large measuring cycles where power is sup-
plied by rechargeable or normal battery the measuring instrument can also be
operated in sleep mode. In energy-saving sleep mode the measuring instrument
switches off after each measuring point scan and switches on again automati-
cally after the cycle expires ready for the next measuring point scan. In this way
with just one battery recharge up to 30000 measuring point scans can be per-
formed; for a cycle lasting 5 minutes this represents a measuring capability of
over 100 days.
For
data recording in sleep mode go to AMR-Control <Device programming>
and take the following steps :
1. Enter a cycle lasting at least two minutes.
2. Activate saving to memory in the cycle.
3. Activate sleep mode.
4. Start measuring operation as normal; the device should then switch off; as
a check the LED
ON
(3) should flash rhythmically on and off.
6. In the specified cycle the instrument switches on automatically, performs
one measuring point scan, and then switches off again.
7. The measuring operation can be stopped by twice pressing key (2e), Func-
tion ´ON´ and ´STOP´.
In this way any number of measuring operations can be performed in sleep
mode up until when sleep mode is deactivated again. With cycles shorter than
2 minutes measuring operations are performed automatically in normal mode.
9.2.2 Device-internal measured value memory (op-
tion S)
With option S data acquisition module ALMEMO
®
8590-9 incorporates a
memory with a 512-KB EEPROM, sufficient for 64000 to 100000 measured val-
ues (depending on the number of channels). This memory is non-volatile; i.e. it
retains data intact even in the event of a failure affecting the lithium battery used
to buffer the real-time clock. How this measured value memory is organized and
how data is recorded to it and output from it are described in the Manual, Section
6.9. It can be configured either as linear memory or ring memory; (see Manual
6.10.13.2).
As on all other ALMEMO
®
data loggers the internal memory supports the follow-
ing functions :
However, only one connector configuration is possible.
Recording to ring memory
Sleep mode
Data output in any normal format
Selective data output according to date and time
Selective data output by number