B&K 2250 Light Instrukcja Użytkownika Strona 217

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CHAPTER 18
Specifications
205
ACOUSTIC
Using Sound Calibrator Type 4231 or custom
calibrator. The calibration process automatically
detects the calibration level when Sound Calibrator
Type 4231 is used
ELECTRICAL
Uses internally generated electrical signal combined
with a typed-in value of microphone sensitivity
CALIBRATION HISTORY
Up to 20 of the last calibrations made are listed and
can be viewed on the analyzer
Data Management
METADATA
Up to 30 metadata annotations can be set per project
(text from keyboard or text from pick list, number from
keyboard or auto generated number)
PROJECT TEMPLATE
Defines the display and measurement setups. Setups
can be locked and password protected
PROJECT
Measurement data stored with the project template
JOB
Projects are organised in jobs
Explorer facilities for easy management of data (copy,
cut, paste, delete, rename, open project, create job,
set default project name)
Software Specifications – Frequency Analysis Software BZ-7223
The specifications for BZ-7223 include the specifi-
cations for Sound Level Meter Software BZ-7222. BZ-
7223 adds:
Standards
Conforms with the following National and International
Standards:
IEC 61260 (199507) plus Amendment 1 (2001–09),
1/1-octave Bands and 1/3-octave Bands, Class 0
ANSI S1.111986, 1/1-octave Bands and 1/3-octave
Bands, Order 3, Type 0C
ANSI S1.11– 2004, 1/1-octave Bands and 1/3-
octave Bands, Class 0
Input
CHANNELS (TYPE 2270 ONLY)
All measurements are made from either Ch.1 or Ch.2
Frequency Analysis
CENTRE FREQUENCIES
1/1-oct. Band Centre Frequencies: 8 Hz to 16 kHz
1/3-oct. Band Centre Frequencies: 6.3 Hz to 20 kHz
MEASUREMENTS FOR SOUND INPUT
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
Spectra for Display Only
Single Values
MEASUREMENTS FOR VIBRATION AND DIRECT
INPUT
Spectra for Display and Storage
Spectra for Display Only
Single Values
MEASURING RANGES
When using Microphone Type 4189:
Dynamic Range: From typical noise floor to max.
level for a pure tone signal at 1 kHz 1/3-octave: 1.1 to
140 dB
L
Xeq
L
XSmax
L
XFmax
L
XSmin
L
XFmin
L
XS
L
XF
L
XYN1
L
XYN2
L
XYN3
L
XYN4
L
XYN5
L
XYN6
L
XYN7
SIL PSIL SIL3
L
Xeq
(f1-f2)
*
*. where f1 and f2 are frequency bands in the spectrum.
NR NR Decisive Band
RC RC Classification
NCB NCB Classification
NC NC Decisive Band
Loudness Loudness Level
Linear Fast max Slow max
Fast min Slow min
Fast Inst Slow Inst
Linear (f1 – f2)
a
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