B&K 2250 Light Instrukcja Użytkownika Pobierz pdf (Strona 128)

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Hand-held Analyzer 2250 Light – User Manual

Fig.13.2

Setting Tone Assessment

option to On

13.3.2 Setting up a Measurement Manually

ISO 1996–2, Annex D

You can set the division between the Low and Middle frequency range, the division between

the Middle and High frequency range, and the limits for the level differences between adjacent

bands (Fig.13.3). (See Fig.13.1 for a definition of the frequency ranges and level differences.)

Fig.13.3

Left: Setting the ‘Low

Freq. Last Band’

parameter

Right: Setting the ‘Level

Difference Low’

parameter

You set the division between the Low/Middle frequency range by selecting the required value

for the Last (or highest) Band in the Low frequency range (from 12.5 Hz to 315 Hz), and set

the division between the Middle/High frequency range by selecting the required value for the

Last (or highest) Band in the Middle frequency range (from 160 Hz to 20 kHz).

The ISO method does not state which frequency weighting should be used, so in the default

setup, A-weighing is selected. However, this is not described in the ISO method, so no

warnings will be generated if you select other frequency weightings.

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B&K 2250 Light Instrukcja Użytkownika Strona 128