9/29/09 C-3
NOTE: The 824 does not meet IEC
61672-1, IEC60804 or ANSI S1.4
specifications when used with a high
sensitivity microphone (377B41 or
377A60) and a 20 volt bias. The bias is
changed to 20 volts for high range
measurements in the ISM and LOG
modes, and -10dB or -20dB gain in all
other modes.
System 824 Main Characteristics:
Class 1 Precision Integrating Sound Level Meter with real-time
1/3 Octave Filters, classified as group X for the emission of,
and susceptibility to, radio frequency fields.
2MB standard memory
Large backlit graphic display (64 X 128 pixels)
Icon-driven graphic user interface
Soft rubber backlit keys
Large dynamic range
RMS Detectors: Slow, Fast, Impulse
Triple Peak Detectors: A, C, FLat
Interval History (statistical)
Time History
L
n
statistics (L0.01 through L99.9 available)
Histogram tables
Direct report printouts to laser printer
Windows
TM
-based software for setup, control, and high speed
data download and reporting
Advanced Windows
TM
-based software packages (optional)
provides data archiving/search capabilities, post-measure-
ment analysis features, and advanced sorting and graphics/
report generation tools.
Multi-tasking processor allows measuring while viewing data,
transferring data, or printing
Programmable Run/Stop timer for automatic measurements
AC/DC outputs to recorder
Field-upgradable firmware: keeps instrument current with the
latest features via ROM disk upgrades
Two-year limited warranty
General Specifications
Reference level: 114.0 dB SPL
Reference level range ISM Mode: Normal
SSA Mode: 0 dB Gain
Reference frequency: 1000 Hz
Reference direction: 0° for a free field
microphone and 80°
for a random incidence
microphone
Temperature: ± 0.5 dB error
between
-10° C and 50°C
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