B&K 2250 Light Instrukcja Użytkownika Pobierz pdf (Strona 4)

the complete profile and a ‘zoomed-in’ 100-sample ‘window’, that are intuitively linked by

the cursor.

For the precise timing of noise events, an alternative ‘Fast Log’ view gives you either or both

of the L

and L

Aeq

results for 100 ms intervals. In either the fast log, or profile view, you

can define up to five different markers anywhere in the profile, to identify noise sources or

events. When you use the real-time frequency analysis options, 1/1-octave or 1/3-octave, the

frequency spectrum average, maximum and minimum values can be logged along with the

overall values. Save and view the noise profiles on your Windows

PC with the included

utility program, or for easy analysis of the noise profile, export the whole measurement to

Brüel & Kjær Environmental Noise Software (Type 7820 Evaluator or Type 7821 Evaluator

Light) which have built-in calculation algorithms that allow you to produce compound sound

level figures from several contributions. Some may have impulse or pure tone penalties,

depending on which measurement standard you choose, for example, ISO 1996, DIN 45 645,

TA Lärm, NF S 31-010, or BS 4142. (See Product Data BP 1752.)

You’ll take these measurements with the incredible 120 dB dynamic range of 2250 Light,

allowing measurements from the low noise floor of the instrument to over 140dB. Without a

range switch to consider, you can now make measurements without fear of overload, and still

capture the nuances of a silent night. 2250 Light is an ideal entry point to safe, easy and

precise environmental noise measurements.

Product Noise Measurement

Brüel & Kjær long ago set the standard for product noise measurements. Now, whether you

have a simple A-weighted sound limit requirement, or need to evaluate a 1/3-octave reverberation

chamber sound power test, 2250 Light is scalable to your requirements.

2250 Light can be used as a hand-held device for easy portability,

or it can be operated using your Windows

PC as an on-line USB

controlled device in your laboratory. The user-defined templates

make switching between applications easy.

The wide 120 dB dynamic range of 2250 Light eliminates concern

for overloads, and you can set a preset measurement time to add

consistency to your measurements. Use the built-in headphone

style (3.5mm) output jack to send the signal out to other meas-

urement instrumentation. The included utility program makes it

easy to keep track of results in an organised, archive structure.

And, of course, there’s the Class 1 precision and reputation of

Brüel & Kjær, giving you and your customers’ complete confidence

in your measurements, while adding value to your products.

For comprehensive data management and post-process reporting,

consider using 2250 Light data together with Type 7815 Noise

Explorer, which supports a wide range of user-definable graphic

and tabular displays.

Graphs and tables can be imported into standard Windows

applications such as word proc-

essors and spreadsheets.

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