7
Logging Software for 2250 Light – BZ-7133
Fig.4
Display showing part of
a logging profile and an
exclude marker
With the optional Logging Software enabled, 2250 Light becomes
a versatile instrument for obtaining time histories. The Log-
ging Software allows you to select freely among the broad-
band parameters and log them at intervals from 1 s to 24 h.
At the same time L
Aeq
and/or L
AF
can be logged at 100 ms
intervals.
If Frequency Analysis Software BZ-7131 or BZ-7132 is enabled,
the Logging Software additionally lets you log spectra at the
same 1 s to 24 h intervals.
Logging Software BZ-7133 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 or events
• 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
• Three of the markers can also be set using the three marker pushbuttons
• 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
• Lets you browse easily between markers
• The profile display can be ‘frozen’ at any time (this happens automatically when you tap
the screen), allowing you to work at ease
All markers are saved with the measurement, see Fig. 4. No further bookkeeping is required.
When exporting data to, for example, 7821 Evaluator Light software for further analyses,
markers are directly accessible on the profile.
Data is stored directly on SD or CF cards; for availability, please refer to the Ordering
Information. Data can be directly read from the memory card by the included PC software
BZ-5503 (see following section). This means that even large amounts of data can be quickly
transferred to a PC.
In order to give an indication of the amount of memory required, some examples have been
listed below. Values should be compared to the standard size of the SD cards used, which start
at 128 Mbyte.
For convenience, values for 1 s logging periods during 24 h are given. Other values easily
compute from these:
• Five broadband parameters, no statistics: 1 Mbyte
• All broadband parameters, one 100 ms parameter: 3 Mbyte
• All broadband parameters, no statistics: 4Mbyte
• All broadband parameters, one 100 ms parameter, all 1/3-octave spectra: 30 Mbyte
• All broadband parameters with full statistics: 58 Mbyte
• All broadband parameters, one 100 ms parameter, all 1/3-octave spectra, full statistics:
86 Mbyte
(332 Seiten)
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