B&K 2250 Light Manuel d'utilisateur télécharger pdf (Page 108)

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Hand-held Analyzer 2250 Light – User Manual

All markers can be controlled by the stylus in the Profile display.

You can set a Pre-marker Time between 0 and 5 seconds. This will start markers 1, 2 or

3 the set number of pre-marker seconds before the point where the Back-erase pushbutton

or the Manual Event pushbuttons are pressed. See section 11.3.2.

10) If you have a license for Signal Recording Option BZ-7226, you can define the settings for

recording the signal while logging under the Signal Recording parameters. See Chapter 12

for more information.

11) If you have a license for Tone Assessment Option BZ-7231, you can define its settings

under the Tone Assessment parameters. See Chapter 13 for more information.

11.2 Controlling the Measurement

The measurement is controlled in the same way you would control a normal Sound Level

Meter measurement, using Start/Pause , Continue , Back-erase and Reset

pushbuttons, see 3 for more details.

If you have set the Charge Injection Calibration parameter to On, then CIC is performed at the

start of the measurement and at the end of the measurement. An Exclude marker is set on the

logging profile at the point where the CIC is being performed. The update of the Total

parameters is stopped while the CIC is being performed. You can see the results of the CIC

under Total parameters, CIC Result 1 and CIC Result 2.

Recording the Signal

If you have a license for Signal Recording Option BZ-7226, you can record the input signal

during the measurement by pressing the Manual Event 1 or Manual Event 2

pushbutton (adds a Manual Event marker) or the Back-erase pushbutton (adds an Exclude

marker), or you can record the signal throughout the entire measurement – depending on the

Signal Recording setting in the Setup. Details in Chapter 12.

11.3 Displaying the Results

The Logging measurement screen (or Profile View) includes three tabs at the bottom: Profile,

Spectrum and Broadband View (the Logging SLM includes the tabs: Profile, Broadband and

XL View). The tabs allow you to choose different ways of displaying the measurement results.

All but the Profile tab have been covered previously in Chapters 3 and 10, however a quick

recap is provided below.

The Broadband view shows an instantaneous L

readout, with associated bar graph and a

number of measurement parameters. (The first measurement parameter is displayed in a larger

font size for better readability.)

The XL View increases the size of the first parameter readout to a 4 digit, full-screen display

(including decimal point).

The Spectrum view shows two different spectra parameters being measured simultaneously.

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B&K 2250 Light Manuel d'utilisateur Page 108