B&K 2250 Light Uživatelský manuál stáhnout pdf (Strana 133)

CHAPTER 13

Tone Assessment Option BZ-7231 – 1/3-octave Method

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If you have selected 1/1-octave or a Direct input, tone assessment will be performed, but a

smiley will be displayed. When you tap the smiley it will advise you to use a Microphone.

For an overview of all the remedies associated to the various smileys, please refer to Table 13.2

Table 13.2

Overview of smileys and associated remedies

Note: The ISO method does not specify the weighting filter to be used. The A-weighting filter

is selected by default, but all selectable broadband filters may be applied without warnings.

13.7 Recalling Saved Measurements

Saved measurements using the Frequency Analyzer, 1/3 Oct. and Logging templates can be

opened and the Tone Assessment can be applied. Please refer to section 3.4 and section 6.3 for

information on how to save and recall measurements, respectively.

Smiley Colour Explanation Remedy – Tip for Solution

Red No tone assessment on 1/1

octaves

There is no method for assessing tones when

the spectrum is analysed in 1/1-octave bands,

select 1/3-octave instead

Red No tone assessment on inst.

parameters

It is not possible to make tone assessments on

instantaneous parameters (‘Fast’ or ‘Slow’)

Yellow Analysis on ‘Direct’ The analysis is carried out on a ‘Direct’ input,

select a microphone

Yellow Setup different from ISO

standard

The ISO is selected and the measurement setup

deviates from the proposals in the ISO standard

Yellow Min or Max spectrum When the ISO standard is selected the analyzed

spectrum should be L

Yellow Tone freq outside proposed

ISO range

In the ISO standard the defined frequency range

for tone assessment is from 25 Hz to 10 kHz. A

tone is detected outside this frequency range

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B&K 2250 Light Uživatelský manuál Strana 133