Data logging – Vaisala Hydromet Data Collection Platform User Manual
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Chapter 3 _______________________________________________________ AWS Client Software
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The procedure includes multiple steps, and takes a while to execute. The
following content is erased from the logger:
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Static parameters and parameter sets
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Factory settings and calibration values are preserved.
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Log files from /Log
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Queued content for FTP, SMTP, and HTTP services
Data Logging
Logging means storing the measured and calculated data in the QML
logger internal memory, that is, to a Flash chip with a data storage
capacity of 3.3 MB. Additionally, you can use an external memory card.
For more information, see section
. From the internal and external memory, logged data can be
retrieved later, for example, via a serial line.
Logged data is stored in daily files, for example, L2070326.dat, which
is a binary file. The naming convention is as follows:
-
All log files begin with the name of the log group. The log group
name consists of a letter followed by a number, that is, L0, L1, L2,
L3, and so on.
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The log group name is followed by the date in the YYMMDD
format.
In its Flash memory, the QML logger can log everything it measures
and calculates. The approximate log memory capacity can be checked
and also printed in the Setup information window in Lizard Setup
Software when a setup is created.
Log files are automatically deleted after a given period, so that there is
always a certain amount of logged data saved in the Flash memory. The
period is adjustable in the setup and can vary from 0 (= at midnight, the
previous day's file will be deleted to free up memory) to never delete
(= log memory will be filled up completely). To ensure some data
backup, for example, a value of 4 days is feasible. If the delete interval
NOTE
The QML logger uses UTC time in data logging and managing log
files, not the local time.