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824 Training Manual
3/22/01
824 LOG Instrument
The 824 LOG instrument was designed and configured to
measure all types of environmental noise, thus the name
“LOG”. It is designed for long-term recording and contains
several histories to help you, the environmental noise ana-
lyst, to get the most from your measurement time in the
field.
What Does the LOG Instrument Measure?
The LOG instrument has the following histories:
•
Time History
•
Interval History
•
Excd History
•
Daily History
In addition to the Histories, the LOG instrument measures
the following:
•
Current/Overall levels
•
Six Ln percentiles plus a graph of 1-99 percentiles
•
Exposure
•
LDN and CNEL metrics
•
PassBy
Time History
The Time History of the LOG instrument is almost identical
to the Time History of the SSA instrument except for some
minor details. The LOG time history does not record RTA
spectral data. The time history period can be as short as 1/32
of a second compared to 1/8 of a second for SSA.
Summary of Contents for System 824
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Page 21: ...4 19 01 824 Quick Start 1 15 Settings Menu and Submenus...
Page 22: ...1 16 824Training Manual 4 19 01 Settings Menu and Submenus continued...
Page 52: ...2 20 824 Training Manual 3 22 01...
Page 56: ...3 4 824 Training Manual 3 22 01 RT60 A Settings Menu and Submenus...
