Larson Davis System 824, Справочное руководство

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11/8/00 System 824 Views 6-3
Double Bar - The instrument is paused.
Play Symbol - The instrument is ready to run
(as soon as stabilization completes).
Arrow-Under-Range/Near Noise Floor Indica-
tor -The instrument is under range when the
arrow is longer. The instrument is near its noise
floor when the arrow is shorter. The system
indicator, in the upper right corner of the dis-
play, will indicate when any A, C, or Flat
instantaneous Leq inputs are under range or
near the noise floor. The indicated weight indi-
cator, shown just below the db/weight icon, will
show whether that particular weight is under
range or near the noise floor.
Block with Dark background and Light numer-
als-Shows linerarity range.
Bar and Play Symbol - The instrument is in pre-
view. Current SPL and peak levels are dis-
played, but no data is being acquired.
Animated Hourglass - The instrument is stabi-
lizing to ensure accurate measurement.
Animated Draining Battery - The battery is low,
and the instrument will shut off soon.
O.L. - The instrument has been overloaded;
measurement may not be accurate due to an
overload condition having occurred some time
during the measurement.
Animated Clock - Indicates that the automatic
run/stop timer is active.
Currently overloaded
NOTE: To set the noise floor level, go to
the “Tools” menu and highlight “Calibra-
tion”. Scroll down to “Noise Floor” and
press the
key. Enter the noise floor
using the value provided by the micro-
phone manufacturer’s specifications.