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1.4. Monitoring logic
1.4.1. Interval data
Interval data are always monitored. An interval value is normally the
maximum value over the selected interval, but other operators than “max”
are sometimes used
. When the interval end time is reached, one value per
channel is saved, and a new interval is started. The timestamp of the
interval is the interval end time. The interval time is configured through
INFRA Net or the graphical user interface (GUI).
1.4.2. Transient data
When an instantaneous value exceeds the selected trigger level, a transient
recording is initiated. The trigger level can be changed through INFRA
Net or the graphical user interface.
It is very important to set adequate trigger levels. When set too high, there
will be no recordings. If on the other hand the level is set too low, there
will be lots of recordings, which would lead to:
• Increase of battery consumption.
• High data transfer rate/cost.
A transient recording can also be initiated via the Menu of the graphical
user interface. The maximum value of the channel transients is displayed
under the headline “EVT”, see section 4.2 for further description.
The static sensors (X20) cannot produce transients. Their trigger levels are
only used to make a connection to the INFRA Net server which then can
send a message about the event.
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