3
Sometimes noise levels in the workplace vary dramatically, and perhaps irregularly. To assess
this kind of noise it is helpful to measure and analyse a noise profile – a measurement that
shows how the sound varies with time.
The Logging option for 2250 Light provides this capability in a naturally intuitive way, using
simultaneous views of the complete profile and a ‘zoomed-in’ 100-second ‘window’. Set up
to five different user-defined markers anywhere in the profile, to identify noise sources or
events. If you have installed either the 1/1- or 1/3-octave real-time frequency analysis options,
2250 Light seamlessly integrates the spectrum information into the noise profile.
Back at your desk after a survey, or even a single measurement, archive the measurements
using the included utility program, where you can view all the results of your measurement
on a Windows
®
compatible PC. Use the same utility program to transfer measurement results
to Excel to easily produce reports, or export the results directly to Brüel& Kjær’s Protector
Type 7825, where you can organise and analyze the company’s noise and hearing conservation
program. Type 7825 calculates noise exposure according to ISO 9612.2.
So, whether you are making a simple noise survey, or supplementing noise dose measurements
for noise control or hearing protection selection, 2250 Light is an easy, yet powerful tool to
make you more productive, and more confident in analysing hearing conservation programs.
Environmental Noise Measurement Applications
The tasks for environmental noise measurements are varied, so the instrument you pick for
your measurements needs to be flexible, easy to configure, powerful and accurate. 2250 Light
is all that, and more, making it ideal for a simple noise enforcement measurement one moment,
then a complex environmental impact survey the next. 2250 Light is built on the core platform
of the award winning design of Type 2250. It borrows the robust construction, intuitive touch
screen interface, and legendary Brüel& Kjær measurement accuracy.
2250 Light with the standard Sound
Level Meter software (BZ-7130) is
ideal for a spot noise enforcement
check. Use the large numeric display,
press the conveniently located Start
pushbutton, and when ready, press
the same button to stop the meas-
urement. Press the Save pushbutton,
and you will not only be saving the
results, but also the actual time of
the measurement, its duration, and
even the date and time for the last
calibration of the instrument.
2250 Light can measure all the
parameters needed for environmental
noise, including dual frequency
weightings, Fast, Slow, and Impulse
Time Averaging, L
eq
’s and a full
range of statistical distributions. But just as important, you can set 2250 Light to display just
the parameters you need, then save that display so 2250 Light powers-up, tailor-made for your
use, every time.
For more involved environmental applications, you’ll need to add the Logging option. Now
you can set the instrument to record all, or up to ten selected measurement results at intervals
from one second to one day, for a duration only limited by the size of the CF or SD memory
card used in the external memory slots. The display offers two simultaneous views, one of
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