B&K 2250 Light Bedienungsanleitung PDF herunterladen (Seite 3)

Environmental Noise Assessment Applications

The tasks for environmental noise measurements are varied, so

the instrument you pick for your measurements needs to be

flexible, easy to configure, powerful and accurate. Type 2250-L is

all that and more, ideal for a simple noise enforcement

measurement one moment and ideal for a complex environmental

impact survey the next.

Type 2250-L with included Sound Level Meter software BZ-7130

is ideal for spot noise enforcement checks. Press the Start

pushbutton and, when ready, press the same button to stop the

measurement. Press the Save pushbutton and you will not only

be saving the results, but also the time and duration of the

measurement and the date and time of the last calibration.

Type 2250-L can measure all the parameters needed for environmental noise, including dual frequency

weightings, Fast, Slow, and Impulse Time Averaging, L

s and a full range of statistical distributions. Just as

important, you can set Type 2250-L to display only the parameters you need and save that display so

Type 2250-L starts, tailor-made for your use, every time.

For more involved environmental applications, you’ll need to add the Logging option. Now you can set the

instrument to record all, or up to ten selected measurement results at intervals from one second to one day,

for a durations up to 1 month. The display offers two simultaneous views, one of 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 the L

, 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. With the Tone Assessment Option, annoying tones in the spectrum

may be assessed according to the ISO 1996 standard. Save and view the noise profiles on your Windows®

PC with the included Measurement Partner Suite and use its optional modules for noise assessment based

on logging and frequency analysis.

Make these measurements with the incredible 120 dB dynamic range of Type 2250-L, allowing

measurements from the low noise floor of the instrument to over 140 dB. Without a range switch to consider,

you can now make measurements without fear of overload, and still capture the nuances of a silent night.

Type 2250-L 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, Type 2250-L is scalable

to your requirements.

Type 2250-L can be used as a hand-held device for easy

portability, or it can be operated using your Microsoft

Windows

PC as an online-, USB- or LAN-controlled device in your

laboratory. The user-defined templates make switching between

applications easy.

The wide 120 dB dynamic range of Type 2250-L eliminates

concern for overloads, and you can set a preset measurement

time to add consistency to your measurements. Use the built-in

headphone style (3.5 mm) output jack to send the signal out to

other measurement instrumentation. Measurement Partner Suite

(included) 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.

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