B&K 2250 Light, Руководство пользователя

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CHAPTER 11
Logging (Optional Module)
99
Fig.11.1
The Setup screen
5) Under the Measurement Control parameters, set the Preset Logging Time and Logging
Period as required. Set Synchronize with clock to Yes if you want the logging to
synchronise with whole minutes or hours. For example, if Logging Period is set to
1 minute and you start the measurement at 8:12:33, then the first logging interval will be
from 8:12:33 to 8:12:59 (27 seconds), the second will be from 8:13:00 to 8:13:59
(60 seconds), etc. Set
Synchronize with clock to No if you want every logging interval to
be the specified Logging Period exactly. Set Charge Injection Calibration to On , if you
want to validate the complete measurement chain by performing CIC at the start and end of
the logging measurement, refer to section 5.6.
6) Under the Logged Broadband parameters, choose which broadband parameters you want
to log in accordance with the Measurement Control parameters. You can choose to log Full
Statistics per Logging Period or not. You can also choose to log all the measured Broadband
Parameters or a Selected number of parameters. If you choose Selected then you can
specify up to 10 parameters.
7) The Logged Broadband (100 ms) parameter allows you to log L
Aeq
(with an elapsed time
of 100 ms and a logging period of 100 ms), L
AF
and/or L
AS
(with a logging period of
100 ms) irrespective of the other logging parameters.
8) The Logged Spectrum
a
parameter allows you to choose which spectra to log. You can
specify to log All , None or up to 3 Selected spectra.
9) Under Markers you can specify the names of the five available markers. The markers are
predefined as follows:
• Marker 1: ‘Exclude’ – controlled by pressing the Back-erase pushbutton
• Marker 2: ‘Event 1’ – controlled by pressing the Manual Event 1 pushbutton
• Marker 3: ‘Event 2’ – controlled by pressing the second Manual Event 2 pushbutton
• Marker 4: ‘Marker 4’
• Marker 5: ‘Marker 5’
a. Requires 1/1- or 1/3-octave Frequency Analysis Software for 2250 Light BZ-7131/32