Module 17 Using Event History Firmware; Setting Up The Event History Measurement - Larson Davis SoundAdvisor 831C Reference Manual

17
Module 17
T
option 831C-ELA. This firmware upgrade provides event-based logging analysis and event
history data with manual or timed storage of statistical data and measurement history.
FIGURE 17-1 Sound Event
1.
In this module:

17.1 Setting Up the Event History Measurement ...................................................................... 126

17.2 Storing Event Data ............................................................................................................. 129
17.2.1 Using (Continuous) Daily Auto-Store With Event History
17.3 Viewing Event History Data on the Events Tab ................................................................. 130
17.3.1 Viewing Octave Band and Spectral Events
17.4 Setting Advanced Event Triggers ....................................................................................... 132
17.4.1 Using Running Leq as an Event Trigger
17.4.2 Using 1/1 Octave and 1/3 Octave Event Triggers
17.5 Understanding Level and Dynamic Triggering ................................................................. 134
17.5.1 Understanding Level Triggering
17.5.2 Understanding Dynamic Triggering
17.1 Setting Up the Event History Measurement
This section shows how to add some or all of the following capabilities to a measurement
setup file: Trigger Levels, Event History, Event Time History, and Alert Notifications.
SoundAdvisor Model 831C
Using Event History Firmware
his module shows how to perform a measurement using Event History, a feature of
2.
Setting Up the Event History Measurement
1.
An event starts when the measured sound
pressure level exceeds at least one Trigger
Level and persists longer than the Minimum
Duration you define.
2.
An event stops when the sound level drops
2 dB below the trigger level. This 2 dB
hysteresis is to avoid the creation of multiple
exceedances when the sound level is
fluctuating at or near the trigger level.
126