B&K 2250 Light, User Manual, Page: 144 / 208

2250 Light – User Manual
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Manual Control of Recording (using touch screen):
Recording for the selected time period (subject to the
limitations of the pre-recording buffer). A Sound
marker is set for the selected time period
Automatic Control of Recording: Recording during
all of the event or for preset minimum and maximum
duration. Selectable pre- and post-recording time
Playback: Playback of signal recordings can be
listened to using earphone/headphones connected to
the headphone socket
Gain Adjustment: –60 dB to 60 dB
Software Specifications – Tone Assessment Option BZ-7231
LICENSE
Tone Assessment Option BZ-7231 is enabled with a
separate license and can be used with the 1/3-octave
and logging template (BZ-7132 and BZ-7133)
TONE ASSESSMENT
Tone assessment is based on the measured 1/3-
octave spectrum in accordance with either the
international ‘ISO 1996:2007 Acoustics – Description,
assessment and measurement of environmental noise
– part 2: Determination of environmental noise levels.
Annex D (informative) Objective method for assessing
the audibility of tones in noise – Simplified method’
SPECTRA ASSESSED
The displayed 1/3-octave spectrum (L
eq
)
may be assessed. Assessment is made as post-
processing, that is, when measurement is paused or
stopped
SETUP ACCORDING TO STANDARD
Setups in violation of the standard are indicated as
such on the display. You can then accept to apply the
default setup. Tone assessment will be made if
possible, in spite of standard violations. For tone
assessment according to ISO 1996-2, Annex D, you
can set the division between the Low and Middle
frequency range, the division between the Middle and
High frequency range, and the limits for the level
differences between adjacent bands
RESULTS
Tones are indicated above the spectrum when Tone is
selected as spectrum parameter. The resulting
adjustment can be viewed on the Value panel. It is not
saved with the measurement
QUALITY INDICATORS
On the display, a quality indicator (smiley) will indicate
that a hint is available for tone assessment quality.
Click on the indicator to see the hint
Software Specifications – Measurement Partner Suite BZ-5503
BZ-5503 is included with 2250 Light for easy
synchronisation of data between PC and 2250 Light.
BZ-5503 is supplied on DVD BZ-5298
ON-LINE DISPLAY OF 2250 LIGHT DATA
Measurements on 2250 Light can be controlled from
the PC and displayed on-line with the PC, using the
same user interface on the PC as on 2250 Light
DATA MANAGEMENT
Explorer:
Facilities for easy management of
Instruments, Jobs and Projects (copy, cut, paste,
delete, rename, create)
Data Viewer: View measurement data (content of
projects)
Synchronisation: Projects can be synchronised
between PC and 2250 Light
EXPORT FACILITIES
Excel:
Projects (or user-specified parts) can be
exported to Microsoft
®
Excel
®
Brüel & Kjær Software: Projects can be exported to
Predictor-LimA Type 7810, Noise Explorer Type 7815,
Acoustic Determinator Type 7816, Evaluator Type
7820, Protector Type 7825 or Qualifier (Light) Type
7830 (7831)
POST-PROCESSING
Measurement Partner Suite is a suite of modules,
including post-processing tools for data acquired with
Type 2250-L. The following post-processing modules
are available:
• Logging Post-processing Tools BZ-5503-A
• Spectrum Post-processing Tools BZ-5503-B
These two modules help to assess logging data and
measured spectra, such as calculating contribution
from markers on a logging profile or correcting spectra