B&K 2250 Light, User Manual, Page: 101 / 208

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Chapter 10
1/1- and 1/3-octave Frequency Analysis
(Optional Modules)
2250 Light has two optional Frequency Analysis modules, these are:
• 1/1-octave Frequency Analysis Software for 2250 Light BZ-7131, enables you to make 1/1-
octave measurements and broadband sound level measurements simultaneously
• 1/3-octave Frequency Analysis Software for 2250 Light BZ-7132, enables you to make 1/3-
octave measurements and broadband sound level measurements simultaneously
Check the About Menu to see whether you have the right license to run the frequency
analyzer you require. The About Menu is accessed from the built-in help – tap
on the
shortcut bar, then select About . See Chapter 9 for instructions on installing the license for
the frequency analyzer.
10.1 Setting up the Instrument
The frequency analyzer measures the following spectrum parameters during timed
measurements:
• L
Xeq
• L
XFmax
• L
XSmax
• L
XFmin
• L
XSmin
where X is the frequency weighting A, B, C or Z.
These spectra are saved in the project together with the measured sound level meter (broadband)
parameters.
In addition, the instantaneous spectra L
XF
and L
XS
are always available.
1) Select the FREQUENCY ANALYZER 1/1-OCTAVE or FREQUENCY ANALYZER
1/3-OCTAVE Project Template. (See section 3.2.1 for more details on templates.) The
Project Template is displayed at the top of the screen, if it does not display