B&K 2250 Light Manual do Utilizador descarregar pdf (Página 47)

CHAPTER 4

Getting to Know Your Analyzer

4.2.8 Tone Assessment Option BZ-7231

This option allows the assessment of tones on site, according to selected methods. The option

described in this manual is based on the 1/3-octave method. (Please refer to User Manual

BE 1778 for detailed information about tone assessment based on FFT spectra.) When used

with BZ-7223 Frequency Analysis, BZ-7224 Logging and BZ-7225 Enhanced logging, it

allows you to assess tones in a measured 1/3-octave spectrum according to ISO 1996:2007,

Annex D, or, assess tones in a measured 1/3-octave spectrum according to Italian Law,

“Ministero dell’ambiente, Decreto 16 marzo 1998”.

4.2.9 Low Frequency Option BZ-7234

This option enables:

• Measurements down to 0.4 Hz using Brüel & Kjær low-frequency microphones and adds

G-weighting parameters in accordance with ISO 7196:1995

• Measurements of building vibration parameters using Brüel & Kjær low-level acceler-

ometers in accordance with ISO 2631–2:2003, ISO 8041:2005, DIN 45669–1:2010–09

and DIN 4150-2:1999–06

• 1/3-octave frequency analysis down to 0.8 Hz (1/1-octave down to 1 Hz)

This option can be used together with Sound Level Meter BZ-7222, Frequency Analyzer

BZ-7223, Logging BZ-7224 and Enhanced Logging BZ-7225 software modules and the

2-channel Option BZ-7229.

4.2.10 Built-in Help

If you need more detailed information at any time during operation, tap the Help icon on

the analyzer’s screen. The resulting screen will explain that particular item in much more

detail. You can scroll up and down the explanatory text using either the and

pushbuttons, or the scroll bar on the screen. Return to the normal display screen by

tapping .

If you need to view any of the previous 10 screens you have visited in the help system, tap the

icon at the top of the display.

Software and Hardware Versions

Once in the help system, you can access the list of installed software versions and licenses,

together with information about the hardware. This information is always available and is

accessed by selecting About from the top of the display.

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B&K 2250 Light Manual do Utilizador Página 47