The 1982 Precision Sound-Level
Meter and Analyzer combines measurement versatility with simplicity
of operation to give you a practical, economical solution to a
variety of noise measurements.
Now you can use a single instrument, without plug-in filters or
other add-on accessories, to make A-, B- or C-weighted sound-level
measurements from 30 to 140 dB, octave-band analyses from 31.5
Hz to 16 kHz, and peak or impulse noise measurements.
The 1982 satisfies many noise-measurement
requirements. In a typical industrial facility, a company
safety engineer, noise-control specialist or hired consultant
may be required to make several types of noise measurements in
a single day. With the GenRad 1982, the following measurements
can be made without the need for any accessories or additional
instrumentation.
- A-weighted sound-level measurements to locate noise-hazard
areas
- Peak and impulse measurements of short duration noises caused
by punch presses, metal-stamping equipment, riveting machines,
etc.
- Octave-band analyses required for:
- Ear protector selector
- Noise-barrier material selection
- Noise-source identification for engineering-control
programs
- Audiometric booth-site surveys
Beyond its many uses in industrial safety and hearing-conservation
programs, the 1982 has broad application in:
- General noise measurements made by acoustic consultants
- Environmental noise programs at the federal, state, and community
levels
Alternatives to the single-instrument 1982 solution are separate
instruments for each measurement function or sound-level meters
with cumbersome plug-in or add-on accessories. The combined cost
of separate instruments and accessories usually exceeds the cost
of the 1982. Also, these alternatives require operating knowledge
of different instruments and increase the chances for confusion
and measurement errors.
The 1982 is easy to use. With all of its versatility,
the 1982 is extremely easy to use and does not require special
technical training. Switching its operating mode from sound-level
measurement to octave-band analysis, to peak or impulse measurement
requires only the push of a slide switch or turn of a knob.
Precision sound-level measurement. The 1982's
conformance to ANSI Type 1 and IEC Sound-Level Meter Standard
651, Type 1, is your assurance of the most accurate performance
offered in a sound-level meter. To make a measurement you simply
switch to the weighting and meter response (fast or slow) you
desire, switch on the meter and set the attenuator to the range
that gives you an on-scale reading. Then you read the measured
levels from either the digital display or analog meter.
Octave-band analysis. The octave-band filters
in the 1982 are the most accurate offered in a portable instrument.
This assures a high degree of confidence in your octave-band measurements.
In addition, the 1982 eliminates the often confusing two-attenuator
system used in other instruments. The 1982 features a single attenuator
which allow you to set the range desired, switch on the instrument,
and read the measured level from either display. Should the range
level be set too low, an overload light on the meter face alerts
you to change to a higher level, thus avoiding incorrect readings
Peak and impulse measurement. The 1982's peak
detector is the fastest available for measuring impact or impulse-type
noise. With a 50-microsecond rise time, the detector ensures reading
the true peak of the signal, up to 140 dB. An accessory 10-dB
microphone attenuator extends this range to 150 dB. An impulse
detector which meets IEC 651 is also built-in.
A significant feature of the 1982 allows you to capture and hold
the peak or rms reading on the digital display without inhibiting
successive readings on the analog meter. This lets you take ambient
level readings immediately after the impact occurs without losing
the peak reading. Also, in this mode it is not necessary to wait
for the peak detector to decay before reading a lower level peak.
A press of the capture button resets the long decay time of the
peak detector allowing you to read a lower peak immediately following
the previous measurement. This is especially useful when making
measurements of forging hammers, metal stamping, and similar operations.
Easy, accurate reading. The digital display allows quick, accurate,
error-free reading with a resolution of 0.1 dB. Set the display
mode to continuous and the digital display tracks the analog meter.
other operating modes allow you to "capture and hold"
a reading on the digital display. You can automatically capture
and hold the highest level measured during a measurement period
or push a button to capture the level at a specific moment during
the period. In either of these modes, the analog meter continues
to track the ambient level.
You will find the analog meter easy to read, also. It is calibrated
linearly in 1-dB increments and the dB levels are clearly visible
on the meter face
Accessories available. The 1982 and a calibrator
will satisfy most measurement requirements. For those contemplating
noise measurements where a remote microphone location is required,
a calibrator, carrying case, tripod and extension cable should
be ordered to provide a complete system.
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