11/8/00 System 824 Views 6-25
Current SLM and Overall SLM Views
Current SLM clears and starts over
when the
Reset button is pressed
while running. Overall SLM does not
clear during a reset, but continues
accumulating data.
The System 824 contains two independent data buffers that
can accumulate data separately. In essence, the instrument
becomes two sound level meters in one. The data in the pri-
mary buffer is referred to as the “overall” measurement,
while data in the secondary buffer is referred to as the “cur-
rent” measurement.
The
u
and
d
arrow keys can be
used to cycle between the Current
SLM, Overall SLM, Exposure, Ln
Centiles, and Stats views
The
Current SLM
and
Overall SLM
Views have five com-
mon displays which can be cycled through using the
r
and
l
ar-
row keys. Since these displays are identical they will be
discussed together. These displays are categorized as fol-
lows:
a) SPL
b) Times
c) Min/Max
d) Peaks
e) TWA
Metrics Measurement readings adjusted for night
and day noise impact differences. Adjust-
ments are based on standard nighttime
sound penalties criteria (i.e. LDN, CNEL,
etc.) The total exceedance and back-
ground Leq metrics are also displayed.
PassBy Shows the largest single 10 dB passby
event detected with its Leq, SEL, Lmax,
duration, and occurance date and time.
Wind / Tach Shows wind or tachometer measure-
ments. This function is not currently
enabled.
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