Larson Davis System 824, Руководство по обучению

Страница: 48 / 66

2-16 824 Training Manual 3/22/01
The largest passby event will be shown in the PassBy view.
PassBy Measurement
Whether or not you turn on the Exceedance history, the
PassBy function will automatically record the highest
passby to occur during the run time of the instrument.
You don’t have to enable the Exceed-
ance History to get a passby mea-
surement. If you would like to record
each passby measurement, then it is
necessary to enable the Exceedance
History and select “PassBy” under
the “Excd Trigger” setting. The data
for the PassBy function can be
stored manually. To access this display, press the VIEW V key, scroll down to
“PassBy” and press the Check c key.
For the passby measurement, Lmax has to be higher than the
“SPL Excd Level 1”. It differs from the PassBy Exceedance
in that it does not require the minimum duration set in the
Exceedance History settings. It will record a passby event of
any duration.
Daily History
The Daily History is accessed from the VIEW
menu and
is a special 24 hour history which logs daily sound statistics
including the following:
• Leq 24 (equivalent energy level over 24 hour period)
• L
dn
• CNEL
• Ln’s
• Max
• Min
• Peak I
• Peak II