Vaisala Hydromet Data Collection Platform - Manual (Page 93)

Chapter 4 ____________________________________________ Basic Use of Lizard Setup Software
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The logging process consists of the following stages:
1. Setting up log groups.
2. Selecting the items to be logged in each log group.
3. Defining when the data is to be stored.
4. Defining where the data is to be stored.
5. Defining where the data is to be sent over an FTP connection.
Data can be logged either into the logger internal memory or onto
external memory cards.
Setting Up Log Groups
You can use log groups to group log data according to, for example, the
intervals when the data is being logged. Thus one log group can contain
the variables logged at one-minute intervals and so forth. Using log
groups can also be useful if you define that a change in a certain variable
will cause all variables in a specific log group to be logged. For
example, an alarm will then trigger logging of data somehow involved
with the source of the alarm.
The Log groups frame of the Logging view contains a Group/
Interval/Size list. The Group list includes all the log groups that you
have created. The Interval list displays the logging intervals, measured
in seconds, of the log groups. The Size list contains the automatically
estimated sizes of the created log groups. The sizes indicate how much
log memory each group will take up daily. The size of the internal
memory is approximately 3.3 MB, whereas the external memory can
run up to 2 GB.
NOTE When storing (logging) data on an external memory card, the internal
log memory is used as a temporary storage before transferring files to
the card. Therefore, make sure that there is enough room in the internal
memory for all the files generated during the course of one day.
NOTE The QML logger uses UTC time in data logging and managing log
files, not the local time.