Software Specifications - 2250 Sound Level Meter Software BZ 7222
Conforms with the following National and International Standards:
- IEC61672 -1 (2002-05) Class 1
- IEC60651 (1979) plus Amendment 1 (1993-02) and Amendment 2 (2000-10), Type 1
- IEC60804 (2000-10), Type 1
- DIN 45657 (1997-07)
- ANSIS1-4-1983 (R1997) plus ANSI S1.4A.1985 Amendment, Type 1
- ANSIS1-43-1997 Type 1
Note: The International IEC Standards are adopted as European standards by CENELEC. When this happens, the letters IEC are replaced with EN and the number is retained. Type 2250 also conforms to these EN Standards
TRANSDUCERS
Transducers are described in a transducer database with information on Serial Number, Nominal Sensitivity, Polarization Voltage, Freefield Type, CCLD required, Capacitance and additional information. The analogue hardware is set up automatically in accordance with the selected transducer
CORRECTION FILTERS
For microphone types 4189, 4191, 4193, BZ 7222 is able to correct the frequency response to compensate for:
Sound Field: Free-field or Diffuse-field (for Type 4952 only: 0° reference direction and 90° reference direction)
Accessories (Type 4189 only): None, Windscreen UA 1650 or Outdoor Microphone Kit UA 1404
Accessories (Types 4191 and 4193 only): None or Windscreen UA 1650
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 frequency weighted channels
MEASUREMENTS
X = frequency weightings A pr B
Y = frequency weightings C or Z
V = frequency weightings A, B, C or Z
U = time weightings F or S
N = number between 0.1 and 99.9
MEASURING RANGES
When using Microphone Type 4189:
Dynamic Range: From typical noise floor to max. level for a 1 kHz pure tone signal, A-weighted: 16.6 to 140 dB
Primary Indicator Range: In accordance with IEC 60804,
A-weighted: 23.5 dB to 123 dB
Linearity Range: In accordance with IEC 60804, A-weighted, 1 kHz: 21.4 dB to 140 dB
Linear Operating Range: In accordance with IEC 61672, Aweighted, 1 kHz: 24.8 dB to 140 dB
Peak C Range: In accordance with IEC 61672: 29.5 dB to 143 dB
SAMPLING FOR STATISTICS
The Statistics can be based on either LXF, LXS or LXeq:
- Statistics LXFN1-7 or LXSN1-7 are based on sampling Lxf or Lxs, resp., every 10ms into 0.2 dB wide classes over 130 dB
- Statistics LXN1-7 are based on sampling LXeq every second into 0.2 dB wide classes over 130 dB
Full distribution saved with measurement
MEASUREMENT DISPLAYS
SLM: Measurement data displayed as numbers of various sizes and one quasi-analogue bar
Measured data are displayed as dB values, housekeeping data as numbers in relevant format.
Instantaneous measurement LAF is displayed as a quasi-analogue bar
MEASUREMENT CONTROL
Manual: Manually controlled single measurement
Automatic: Pre-set measurement time from 1 s to 24 hours in 1 s steps
Manual Controls: Reset, Start, Pause, Back-erase, Continue and Store the measurement manually
BACK-ERASE
The last 5 s of data can be erased without resetting the measurement
MEASUREMENT STATUS
On Screen: Information such as overload and running/paused are displayed on screen as icons
Traffic Lights: Red, yellow and green LEDs show measurement status and instantaneous overload as follows:
- Yellow LED flash every 5 s = stopped, ready to measure
- Green LED flashing slowly = awaiting calibration signal
- Green LED on constantly = measuring
- Yellow LED flashing slowly = paused, measurement not stored
- Red LED flashing quickly = intermittent overload, calibration failed
CALIBRATION
Initial calibration is stored for comparison with later calibrations
Acoustic: Using Sound Calibrator Type 4231 or custom calibrator. The calibration process automatically detects the calibration level when Sound Calibrator Type 4231 is used
Electrical: Uses internally generated electrical signal combined with a typed-in value of microphone sensitivity
Calibration History: Up to 20 of the last calibrations made are listed and can be viewed on the instrument
SIGNAL MONITORING
The input signal can be monitored using an earphone/headphones connected to the headphone socket, or it can be fed to the output socket
Output Signal: Input conditioned; A-, B-, C- or Z-weighted
Gain Adjustment: .60 dB to 60 dB
Lxf output (every ms) as a DC voltage between 0 V and 4 V
DC output for calibration purposes: 0 dB - 0 V and 200 dB - 4 V
Headphone Signal: Input signal can be monitored using this socket with headphones/earphones
Gain Adjustment: -60 dB to 60 dB
VOICE ANNOTATIONS
Voice annotations can be attached to measurements so that verbal comments can be stored together with the measurement
Playback: Playback of voice annotations can be listened to using an earphone/headphones connected to the headphone socket
Gain Adjustment: -60 dB to 0 dB
TEXT ANNOTATIONS
Text annotations can be attached to measurements so that written comments can be stored with the measurement
DATA MANAGEMENT
Project Template: Defines the display and measurement setups
Project: Measurement data stored with the Project Template
Job: Projects are organised in Jobs. Explorer facilities for easy management of data (copy, cut, paste, delete, rename, view data, open project, create job, set default project name)
USERS
Multi-user concept with login. Users can have their own settings with jobs and projects totally independent of other users
PREFERENCES
Date, Time and Number formats can be specified per user
Software Specifications . 2250 Frequency Analysis Software BZ 7223
The specifications for BZ 7223 include the specifications for 2250 Sound Level Meter Software BZ 7222. BZ 7223 adds:
STANDARDS
Conforms with the following National and International Standards:
- IEC61260 (1995.07) plus Amendment 1 (2001.09), 1/1-octave Bands and 1/3-octave Bands, Class 0
- ANSIS1.11.1986 (R 1993), 1/1-octave Bands and 1/3-octave Bands, Order 3, Type 0.C
- ANSIS1.11. 2004, 1/1-octave Bands and 1/3-octave Bands, Class 0
CENTRE FREQUENCIES
1/1-octave Band Centre Frequencies: 8Hz to 16 kHz
1/3-octave Band Centre Frequencies: 6.3Hz to 20 kHz
MEASUREMENTS
X = frequency weightings A, B, C or Z, Y = time weightings F or S
Data for Storage
Full Spectral Statistics
Spectra for Display and Storage
| LXeq |
LXSmax |
LXFmax |
| LXSmin |
LXFmin |
|
Spectra for Display Only
| LXS |
LXF |
Lxyn1 |
| Lxyn2 |
Lxyn3 |
Lxyn4 |
| Lxyn5 |
Lxyn6 |
Lxyn7 |
Single Values
LAeq (20-200Hz)
MEASURING RANGES
When using Microphone Type 4189:
Dynamic Range: From typical noise floor to max. level for a pure
tone signal at 1 kHz 1/3-octave: 1.7 to 140 dB
Linear Operating Range: In accordance with IEC 61260: ≤ 20.5 dB
to 140 dB
SAMPLING FOR OCTAVE OR 1/3-OCTAVE STATISTICS
X = frequency weightings A or B
The Statistics can be based on either LXF or LXS:
- Statistics LXFN1-7 or LXSN1-7 are based on sampling LXF or LXS,
respectively, every Tms into 1 dB wide classes over 150 dB;
T = 100 for frequency range set to 12.5 - 20 kHz
T = 200 for frequency range set to 6.3 - 20 kHz
Full distribution can be saved with measurement
MEASUREMENT DISPLAYS
Spectrum: One or two spectra superimposed + A/B and C/Z
broadband bars
Y-axis: Range: 5, 10, 20, 40, 60, 80, 100, 120, 140 or 160 dB. Auto
zoom or auto scale available
Cursor: Readout of selected band
Software Specifications . 2250 Logging Software BZ 7224
The specifications for BZ 7224 include the specifications for 2250 Sound Level Meter Software BZ 7222. BZ 7224 adds:
MEASUREMENTS
Logging: Measurement data logged at pre-set periods into files on external SD- or CF-cards
Logging Period: From 1 s to 24 hours with 1 s resolution
Fast Logging: LAF and LAeq can be logged every 100ms, irrespective of logging period
Broadband Data Stored at each Logging Interval: All, or up to 10 selectable broadband data
Broadband Statistics Stored at each Logging Interval: Full distribution, or none
Spectrum Data Stored at each Logging Interval: All, or up to 3 selectable spectra (license for BZ 7223 required)
Logging Time: From 1 second to 31 days with 1 s resolution
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 online 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. Fast display of next or previous marker, Profile Overview of
entire measurement
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 BZ 7225
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
Ldn, Lden, Lday, Levening and Lnight
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 1min to 24 hours with 1min 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 BZ7226
Sound Recording Option BZ 7226 is enabled with a separate license. It works with all the software described in this data sheet: 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-, B-, 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 detected only later.
| 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 |
FUNCTIONS WITH BZ 7222 AND BZ 7223
Manual Control of Recording: Recording can be manually started and stopped during a measurement
Automatic Control of Recording: Start of recording when measurement is started. Maximum recording time can be preset
FUNCTIONS WITH BZ 7224
Manual Control of Recording (using Event pushbutton): Recording during all of the event, or for preset maximum duration. A Sound marker is set while recording. Selectable pre-recording time
Manual Control of Recording (using touch screen): Recording for the selected time period (subject to the limitations of the prerecording 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 maximum duration. Selectable pre-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
USERS
Users of Type 2250 can be created or deleted
EXPORT FACILITIES
Excel: Projects (or user specified parts) can be exported to Microsoft® Excel
Type 7810/12/15/16/20/25: Projects can be exported to Predictor Type 7810, Lima Type 7812, Noise Explorer Type 7815, Acoustic Determinator Type 7816, Evaluator Type 7820 or Protector Type 7825
TYPE 2250 SOFTWARE UPGRADES AND LICENSES
The utility software controls Type 2250 software upgrades and licensing of the Type 2250 applications
INTERFACE TO TYPE 2250
USB ver. 1.1 or Hayes compatible GSM or standard analogue modem
PC REQUIREMENT
Operating System: Windows® 2000/Windows® XP, Microsoft®.NET
Recommended PC: Pentium® III (or equivalent) processor, 128 Mbyte RAM, SVGA graphics display/adaptor, sound card, CD ROM drive, mouse, USB, Windows® XP
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