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Figure 5.6.2. Subsection dedicated to the setting of the common trigger.
Click on the
Add
button to set-up a new condition. Click in the
Edit combination
section the
select
box for the single MRs. In the column
Name
you may enter a mnemonic for this condition (e.g. MR
in cellar). In the column
Selected
the logical combination of this condition is shown. The logical
combination of all conditions is shown in the section
Logic function.
A simple example is here presented. You have to install 2 instruments to monitor the vibration in a
5-floors building. 1 MR is in the cellar, one MR in the middle of the room on the 5th floor. As there is
a lot of activity in the room on the 5th floor, you don't want to use a trigger (disable the trigger) on
this instrument, but you would like to have a recording on this instrument if the vibration in the cellar
exceeds the threshold level. For this simple example, the MR in the cellar alone can issue a
common trigger, so you have one single condition and you check only the MR in the cellar.
If a file is recorded due to a common trigger condition, this is shown in the
Recording List
with the
entry
Common
in the column
Reason.
If at the same time in the corresponding MR also the local
criteria for triggering were met, there will be 2 recordings of the same time history, but with different
starting time and duration – the file recorded due to the common trigger overlaps the file due to the
local trigger. The files due to common trigger have the same start time and the same duration in all
the MRs in the network.
To get only files due to a common trigger from the
Recording list
, you will have to apply a filter for
the
Reason.
