Larson Davis System 824, Reference Manual

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11/8/00 System 824 Views 6-57
Record Number - The record number indicates the order of
the displayed Daily record in relation to the other records.
Hourly Leq Reading - This is the hourly Leq as shown by
the cursor.
Exceedance Leq - This shows the average level of all of the
exceedance events.
Background Leq - The background Leq is the hourly Leq
minus the exceedance Leq.
Hour indicator - The hour indicator shows which hour of
the day is being displayed. A “p” following the Hour indica-
tor means that the measurement was not for a full hour.
Hourly Leq graph - This graph shows the Leq value for
each hour. Use the
r
and
l
arrow keys to move the cur-
sor to view the Leq, background Leq and exceedance Leq
for each hour.
Metrics
The
u
and
d
arrow keys can be
used to cycle between the Metrics,
PassBy, and Wind / Tach views.
The Metrics View has two displays which can be accessed
by simply selecting Metrics with the
c
Check key from
within the main View menu then cycling through the views
with the
r
and
l
arrow keys until the desired display
appears.
Metrics-a Display The Metrics-a display consists of five major components:
• Display label
• L
eq
Reading
• DNL Reading
• CNEL Reading
• Elapsed Time
The Metrics-a display is shown below: