15
Measurement Total: For the logging time, in parallel with logging:
All broadband data, statistics and spectra (license for BZ 7223
required)
MARKERS
One data exclusion marker and four user-definable markers for on-
line marking of sound categories heard during the measurement
Events can be set manually
TRIGGERS
Markers can be set when a broadband level is above or below a
specified level
ANNOTATIONS
On-line annotations with spoken comments or written notes
MEASUREMENT DISPLAYS
Profile: Graphical display of selectable measurement data versus
time
Y-axis: Range: 5, 10, 20, 40, 60, 80, 100, 120, 140 or 160 dB. Auto
zoom or auto scale available
X-axis: Scroll facilities
Cursor: Readout of measurement data at selected time
Software Specifications – 2250 Enhanced Logging Software BZ7225
The specifications for BZ 7225 include the specifications for 2250
Logging Software BZ 7224 and for 2250 Frequency Analysis Software
BZ 7223. Licenses for BZ 7223 and BZ 7225 are required to run
BZ 7225. BZ 7225 adds:
MEASUREMENTS
For Display and Storage
L
dn
, L
den
, L
day
, L
evening
and L
night
Selectable Day, Evening and Night periods and penalties
Periodic Reports: Measurement data logged at a pre-set report
period into files on external SD- or CF-cards
Report Period: From 1 min to 24 hours with 1 min resolution
Broadband Data and Statistics Stored at each Reporting Interval:
All
Spectrum Data Stored at each Reporting Interval: All
Spectral Statistics Stored at each Reporting Interval: Full
distribution, or none
Logging Time: From 1 second to 31 days with 1 s resolution or
Continuous
Data are saved in separate projects for every 24 hrs of logging
Automatic reboot and resume of operation in case of power failure
MEASUREMENT DISPLAYS
Profile: Fast display of next or previous marker
Software Specifications – Sound Recording Option BZ 7226
Sound Recording Option BZ 7226 is enabled with a separate license.
It works with all the software for Type 2250: Sound Level Meter,
Frequency Analysis, Logging Software and Enhanced Logging
Software
Sound Recording requires a CF- or SD-Card for data storage
RECORDED SIGNAL
A-, C- or Z-weighted signal from the measurement transducer
AUTOMATIC GAIN CONTROL
The average level of the signal is kept within a 40 dB range, or the
gain can be fixed
SAMPLING RATE AND PRE-RECORDING
Sound is buffered for the pre-recording of sound. This allows the
beginning of events to be recorded even if they are only detected
later.
FUNCTIONS WITH BZ 7222 AND BZ 7223
Manual Control of Recording: Recording can be manually started
and stopped during a measurement using a pushbutton or an external
signal
Automatic Control of Recording: Start of recording when
measurement is started. Minimum and Maximum recording time can
be preset
FUNCTIONS WITH BZ 7224
Manual Control of Recording (using Manual Event or Back-erase
pushbutton, or an external signal): Recording during all of the
event, or for preset minimum and maximum duration. A Sound marker
is set while recording. Selectable pre- and post-recording time
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: An event can be triggered when
a broadband level is above or below a specified level. Recording
during all of the event or for preset minimum and maximum duration.
Selectable pre- and post-recording time
PLAYBACK
Playback of sound recordings can be listened to using the earphone/
headphones connected to the headphone socket
RECORDING FORMAT
The recording format is 16-bit wave files (extension .wav) attached
to the data in the project, easily played-back afterwards on a PC
using Type 7815, 7820 or 7825. Calibration information is stored in
the wav file, allowing PULSE to analyse the recordings
Software Specifications – Utility Software for Hand-held Analyzers BZ 5503
BZ 5503 is included with Type 2250 for easy synchronisation of
setups and data between PC and Type 2250. BZ 5503 is supplied
on CD-ROM BZ 5298
ON-LINE DISPLAY OF TYPE 2250 DATA
Measurements on Type 2250 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
DATA MANAGEMENT
Explorer: Facilities for easy management of Instruments, Users,
Jobs, Projects and Project Templates (copy, cut, paste, delete,
rename, create)
Data Viewer: View measurement data (content of projects)
Template Editor: Editor for changing setups in Project Templates
Synchronisation: Project Templates and Projects for a specific user
can be synchronised between PC and Type 2250
Sampling
Rate (kHz)
Maximum
Pre-recording (s)
Sound
Quality
Memory
(KB/s)
8 100 Low 16
16 50 Fair 32
24 30 Medium 48
48 10 High 96
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