Larson Davis 831, User Manual

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13-4 Trigger Method Model 831 Manual
Level Trigger Method
In the section “Triggers Tab” on page 4-11, it is explained
how the Triggers Menu, shown in Figure 13-2, is used to set
the parameters defining exceedance events.
FIGURE 13-2 Triggers Menu
An exceedance event for which Event History data is
measured and stored is initiated when either of the following
occur:
• The SPL level (Fast, Slow or Impulse detector) exceeds
the user-defined SPL 1 level
• The Peak level (Peak detector) exceeds the user-defined
Peak 1 level
When the SPL level also exceeds the SPL 2 level, this is
noted in the Events display of the
Overall tab, as shown in
FIGURE 5-21 "Overall Tab: Exceedances” on page 5-21.
When the Peak level also exceeds the Peak 2 level or the
Peak 3 level (which should be higher than the Peak 2 level),
this is noted on the
Exceedances page of the Overall tab.