Bruel & Kjaer 2250 Logging Software - BZ 7224
The B&K 2250 is a multi-function meter, for other options and accessories click a link
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B&K 2250 - Home Page B&K 2250 - Summary Table B&K 2250 - Specifications Options and software included BZ 5503 - PC - Utility Software BZ 7222 - Sound Analysis Software BZ 7223 - Frequency Analysis Software BZ 7224 - Logging Software - this page BZ 7226 - Sound Recording Software |
Other options available BZ 7225 - Enhanced Logging Software BZ 7227 - Reverberation Time Software BZ 7228 - Sound Insulation Software BZ 7230 - FFT Measurement Software BZ 7231 - Tonal Assessment Software |
| Accessories etc., Environmental and Factory Noise Kits and other popular accessories |
| B&K 2250 Logging Option - BZ 7224 | included with all our 2250 meters |
All our 2250 meters are delivered with the Logging Software so the 2250 becomes a versatile instrument for obtaining time histories. The Logging Software allows you to select freely among the broadband parameters and log them at intervals from 1 s to 24 h. At the same time LAeq and/or LAF can be logged at 100ms intervals.If Frequency Analysis Software BZ 7223 is enabled, the Logging Software additionally lets you log spectra at the same 1 s to 24 h periods.
Logging Software BZ 7224 incorporates a number of features designed to make difficult field work as manageable as possible.
Among the most salient of these features are the following:
Five user-definable markers can be set on-the-fly in the profile. Use these, for example, to clearly indicate specific noise sources
Markers can be set directly on the profile display using the stylus and the touch screen. Simply 'tap and drag' on the part of the profile you want to mark and select a marker from the drop-down list
Markers can even be set 'after the fact'. The display covers the latest 100 samples (that is, 100 s of profile when logging at 1 s intervals, otherwise more) meaning that in most cases you can wait for the event (or disturbance) to stop before placing your marker. Alternatively, scroll back in the profile and set your marker
The profile display can be 'frozen' at any time (this happens automatically when you tap the screen), allowing you to work at ease
Voice annotations, using the commentary microphone, are attached to the exact point on the profile where the annotation is made. With the microphone on an extension cable, comments can be associated with particular parts of the profile without interfering with the measurement
Using the timer features it is now possible to set up sequential or specific measurements at any time of the day, today or next week, the analyzer goes into stand-by until required, conserving battery life and memory space.
All markers and annotations are saved with the measurement, see Fig. 8 and Fig. 9. No further bookkeeping is required. When exporting data to, for example, 7820 Evaluator software for further analyses, markers, as well annotations, are directly accessible on the profile.B&K 2260 Memory **
Data are stored directly on SD or CF cards. BZ 7224 includes a suitable SD card. Data can be directly read from the SD card by the included PC software BZ 5503 (see page 11). This means that even large amounts of data can be quickly transferred to a PC.
In order to give an indication of the memory required, some examples have been listed below and should be compared to the size of the SD cards in use.
Values for 1 second logging periods over a 24 hour period are given below. Other values may be calculated from these examples:
Five broadband parameters, no statistics = 1 MB
Space needed for annotations and recordings must, of course be added to this. As a guideline, 10 seconds of voice annotation requires approximately 312 KB.
B&K also have a 2250 memory spreadsheet. To get to a copy click here
If the Sound Recording module BZ 7226 (see following section) is also enabled, Logging Software BZ 7224 becomes even more versatile. In this case the actual signal can be recorded during, for example, a noise event. Recordings can be controlled manually, or automatically by a level trigger. BZ 7226 includes a pre-recording of sound (size of buffer dependent upon sample rate, see specifications), which means that sound recorded prior to the identification of an event is also included in the recording. The combination of recording the actual signal and making voice annotations on a separate channel provides exceptional documentation capabilities.
If Sound Recording Option BZ 7226 is also enabled, you can record all or part of the measured signal.
Click here to see the B&K 2250 Sound Logging Specifications.
* Our standard hire charges are based on a 4-day minimum period, details other options.
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