Larson Davis 831 - Event History (831-ELA Required); Exceedance Counters; Measurement History (831-ELA Required); Miscellaneous Parameters

24-6 Exceedance Counters Model 831 Manual
Exceedance Counters
See “Triggers Tab” on page 4-11 The Model 831 has three exceedance event counters: two
RMS event counters and three peak event counters. For each
exceedance there is a threshold level, event counter and
duration.
The thresholds L
XV
or L
Ypeak
are the levels that the
parameter must exceed to increment the counter and
duration. X is RMS frequency weighting, Y is peak
frequency weighting and V is time weighting.
The Count is the number of times each parameter has exceed
the preset level.
The duration is the total accumulated duration of all
exceedances for a specific parameter.
Miscellaneous Parameters
S.E.A.
SEA is a time integration of peak levels that exceed 120 dB.
Time History (831-LOG Required)
See Chapter 11 “Time History” on page 11-1.
Measurement History (831-ELA Required)
See Chapter 12 “Measurement History” on page 12-1.
Event History (831-ELA Required)
See Chapter 13 “Event History” on page 13-1.