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Brüel & Kjær - B&K

Bruel & Kjaer 2250 Sound Level Meter

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The Bruel & Kjaer 2250 Sound Level Meter is an innovative 4th generation hand-held analyzer. The Bruel & Kjaer 2250 can host a number of software modules, including frequency analysis, logging (profiling) and recording of the measured signal. These are available separately at any time - or you can order it fully pre-configured.

The combination of software modules and innovative hardware makes the Bruel & Kjaer 2250 into a dedicated solution for performing high-precision measurement tasks, in the environmental, occupational and industrial application fields. As a result, you get the functionality you need now, plus the option of opening up for more functionality later.

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Features
  • Single-channel input (microphone, accelerometer or direct signal)
  • 3 Hz-20 kHz broadband linear frequency range with supplied microphone Type 4189
  • 16.6 - 140 dB A-weighted dynamic range with supplied microphone Type 4189
  • Rear panel:
    • Socket for AC or CCLD input
    • Trigger input for external trigger
    • Output socket for generator signal
    • Headphone output
  • USB 2.0 (On-the-go) computer interface
  • USB 2.0 host for connection to printer, GPS, weather station, modem
  • LAN connection for internet access
  • Plug-in rechargeable Li-ion battery (> 8h operation)
  • Data storage on plug-in SD / SDHC memory cards
  • Occupational noise evaluation
  • Noise reduction
  • Analysis of time histories for broadband parameters and spectra (logging)
  • Documentation of measurements using test and voice annotations
  • Real-Time analysis of sound in 1/1 and 1/3 octave bands
  • Product Quality Control
  • Documentation of measurement through recording of measured sound.
Specifications
Conforms with the following National and International Standards: IEC 61672–1 (2002–05) Class 1
IEC 60651 (1979) plus Amendment 1 (1993–02) and Amendment 2
(2000–10), Type 1
IEC 60804 (2000–10 ), Type 1
DIN 45657 (1997– 07)
ANSI S1.4–1983 plus ANSI S1.4A–1985 Amendment, Type 1
ANSI S1.43–1997, Type 1
Inpute Channels (Type 2270 only) All measurements are made from either Ch.1 or Ch.2
Transducers Transducers are described in a transducer database with information on Serial Number, Nominal Sensitivity, Polarization Voltage, Free-field Type, CCLD required, Capacitance and additional information. The analogue hardware is set up automatically in accordance with the selected transducer
Sound Field Free-field or diffuse-field (for Types 4952 and 4184-A only: 0° (Top) reference direction and 90° (Side) reference direction)
Accessories Types 4189 and 4190 only: None, Windscreen UA-1650 or Outdoor Microphone Kit UA-1404
Types 4191 and 4193 only: None or Windscreen UA-1650
Type 4950 only: None or Windscreen UA-0237
Detectors Parallel detectors on every measurement:
A- or B-weighted (switchable): Broadband detector channel with three exponential time weightings (Fast, Slow, Impulse), one linearly averaging detector and one peak detector
C- or Z-weighted (switchable): As for A- or B-weighted
Overload Detector: Monitors the overload outputs of all the frequencyweighted channels
Measurements X = frequency weightings A or B
Y = frequency weightings C or Z
V = frequency weightings A, B, C or Z
N = number between 0.1 and 99.9
Q = exchange rate 4, 5 or 6 dB
U = time weightings F or S
Applications
Learn About NDT Testing  
Options
Accessories
Standards
The Bruel & Kjaer 2250 can fulfill the requirements of the latest standard, IEC 61672-1 and international standards ISO 7196:1995, ANSI/ASA S1.4, S1.42, and S1.43 as well as earlier standards (see the specifications section for detailed compliance information).

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