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.
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 |