Sound and Vibration Instrument Hire and Calibration

B&K 2250 BZ 7223 Frequency Analysis Specifications

To see the specifications for the various options available, click a link

Bruel & Kjaer 2250 : Frequency Analysis Software - BZ 7223	included

Conforms with BS EN 61260-1:2014

Centre Frequencies

1/1-octave Band Centre Frequencies: 8Hz to 16 kHz
1/3-octave Band Centre Frequencies: 6.3Hz to 20 kHz

Measurements

X = frequency weightings A, B, C or Z
Y = time weightings F or S

Data for Storage

Full Spectral Statistics

Spectra for Display and Storage

LXeq	LXSmax	LXFmax
LXSmin	LXFmin

Spectra for Display Only

LXS	LXF	LXYN1
LXYN2	LXYN3	LXYN4
LXYN5	LXYN6	LXYN7

SIL	PSIL	SIL3
LXeq(f1-f2)a
NR	NR Decisive Band
RC	RC Classification
NCB	NCB Classification
Loudness	Loudness Level

Where f1 and f2 are frequency bands in the spectrum.

Measuring Ranges

When using a Microphone Type 4189
Dynamic Range: From typical noise floor to max. level for a pure tone signal at 1 kHz 1/3-octave: 1.7 to 140 dB
Linear Operating Range: In accordance with IEC 61260 <20.5 dB to 140 dB.

Sampling for Octave or 1/3-octave Statistics

X = frequency weightings A or B
The Statistics can be based on either LXF or LXS:
Statistics LXFN1-7 or LXSN1-7 are based on sampling LXF or LXS, respectively, every T ms into 1 dB wide classes over 150 dB;
T = 100 for frequency range set to 12.5 - 20 kHz
T = 200 for frequency range set to 6.3 - 20 kHz
Full distribution can be saved with measurement

Measurement Displays

Spectrum: One or two spectra superimposed + A/B and C/Z broadband bars
Y-axis: Range: 5, 10, 20, 40, 60, 80, 100, 120, 140 or 160 dB. Auto zoom or auto scale available
Cursor: Readout of selected band

Cursor:

Readout of selected band

Internal Generator

Built-in pseudo-random noise generator
Spectrum: Selectable between Pink and White
Crest Factor:
Pink Noise: 4.4 (13 dB)
White Noise: 3.6 (11 dB)
Bandwidth: Selectable

External Generator

Selectable as alternative to Internal generator
To control external noise generator, set:
Levels: 0 V (Generator off), 4.5 V (Generator on)
Rise-time and Fall-time: 10 µs
The noise generator is turned on and off automatically during the measurement.
Escape Time: 0 to 60 s
Build-up Time: 1 to 10 s
The generator can be turned on and off manually for checking equipment and sound levels
E&OE - specifications subject to change without notice.
* Our standard hire charges are based on a 4-day minimum period, details other options.