B&K 2250 Light Manual do Utilizador Página 227

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CHAPTER 18
Specifications
215
Building Vibration
Specifications for Building Vibration parameters apply
to Type 2250/2270 fitted with an accelerometer.
Standards
Conforms with the following International Standards:
ISO 8041:2005
DIN 45669-1:2010–09
Analysis
DETECTORS
Wm-weighted or Wmb-weighted detectors run in
parallel with the Linear weighted broadband detectors.
Wmb is the band-limiting part of the Wm weighting.
MEASUREMENTS
Spectra for Display and Storage (BZ-7223 required)
Spectra for Display Only (BZ-7223 required)
Single Values for Display and Storage
Single Values for Display Only
Low Frequency 1/1- and 1/3-octave Analysis
Frequency Analysis
CENTRE FREQUENCIES
1/1-oct. Band Centre Frequencies: 1 Hz to 16 kHz
1/3-oct. Band Centre Frequencies: 0.8 Hz to 20 kHz
Standards
Conforms with the following National and International
Standards:
IEC 61260 (1995–07) plus Amendment 1 (2001–09),
1/1-octave Bands and 1/3-octave Bands, Class 0
ANSI S1.11–1986, 1/1-octave Bands and 1/3-octave
Bands, Order 3, Type 0–C
ANSI S1.11–2004, 1/1-octave Bands and 1/3-octave
Bands, Class 0
Sound Measurements
Low frequency sound measurements require use of a
low frequency microphone. This can be the Type 4193
or Type 4964, both together with Low Frequency
Adaptor UC-0211
Vibration Measurements
Brüel & Kjær recommends Low-level Accelerometer
Type 8344 for low frequency vibration measurements
Software Specifications – Measurement Partner Suite BZ-5503
BZ-5503 is included with Types 2250, 2270 and 2250
Light (referred to as Type 2250/70 here) for easy
synchronisation of setups and data between the PC
and hand-held analyzer. BZ-5503 is supplied on ENV
DVD BZ-5298
PC REQUIREMENTS
Operating System: Windows
®
7 or XP (both in 32-bit
or 64-bit versions)
Recommended PC:
Intel
®
Core™ 2 Duo
•Microsoft
®
.NET 4.0
2 GB of memory
Sound card
•DVD drive
At least one available USB port
ON-LINE DISPLAY OF TYPE 2250/2270 DATA
Measurements on Type 2250/2270 can be controlled
from the PC and displayed on-line with the PC, using
the same user interface on the PC as on
Type 2250/2270
Display: 1024 × 768 (1280 × 800 recommended)
aW Fast max Slow max
Fast min Slow min
Fast Inst Slow Inst
aW aW
Crest
MTVV
KBF
max
KBF
Tm
Peak
T
Peak
aW,1s KBF
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