6
Sound Level Meter Software for 2250 Light – BZ-7130
SLM Module
Fig.2
The large numeric
display - ideal for a
spot noise
enforcement check
2250 Light comes with the Sound Level Meter Software for
2250 Light included. This makes 2250 Light into a versatile
broadband sound level meter; it complies with the latest in-
ternational standard (IEC61672–1) as well as previous inter-
national and national standards.
All quantities are measured at the same time. For example, A
and C frequency weighted levels are measured simultaneously,
and at the same time F, S and I time weightings are applied
in parallel. In addition, Peak levels are measured. Full statistics
are also computed on-the-fly. Combine this with the dynamic
range exceeding 120 dB and you will never miss a beat! You
get all the parameters in one attempt, under-range is non-
existent and you will have difficulties provoking an overload.
A full compliment of occupational health sound parameters
are provided simultaneously, complying with national and international standards. The detailed
list of available parameters can be found in the specifications section. You choose what you
want on the display, but, at any time – during or after the measurement – all other parameters
can be inspected and reported.
1/1- and 1/3-octave Frequency Analysis Software for 2250 Light – BZ-7131 and BZ-7132
Fig.3
Example of 1/1-octave
frequency analysis.
Note that two spectra
are displayed
simultaneously
1/1-octave Frequency Analysis Software for 2250 Light BZ-7131,
and 1/3-octave Frequency Analysis Software for 2250 Light
BZ-7132 are optional software modules. They allow you to
make real-time measurements in 1/1- or 1/3-octave bands over
a wide frequency range. This makes it a simple matter to
obtain spectra in order to, for example, select hearing protection,
qualify heat and ventilation systems, and assess tonality.
The following frequency ranges are available:
• 1/1-octave spectra (centre frequencies 16 Hz to 8 kHz)
• 1/3-octave spectra (centre frequencies 12.5 Hz to 16 kHz)
In each band you have a full and unrivalled dynamic range
from the noise floor in that particular band to 140dB. That
is, a dynamic range generally in excess of 135dB.
Spectra can be A-, B-, C- or Z-weighted. Five spectra are measured and stored and, in addition,
two instantaneous spectra are available for display. Two spectra, for example, a minimum and
maximum spectrum, can be superimposed on the display. All the broadband quantities measured
by Sound Level Meter Software BZ-7130 are computed in parallel with the frequency analysis.
(332 paginas)
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