B&K 2250 Light Manual do Utilizador descarregar pdf (Página 190)

178

Hand-held Analyzer Types 2250 and 2270 – User Manual

If you have selected 1/1-octave, an Accelerometer as transducer, 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 15.2

Table 15.2

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.

15.9 Recalling Saved Measurements

Saved measurements using the Frequency Analyzer, Logging and Enhanced 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 Analysis on ‘Accelerometer’ The analysis is carried out on an accelerometer

input, select a microphone

Red Spectrum must be L

ZFmin

When Italian Law is selected the analysed

spectrum must be L

ZFmin

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

Yellow Tone freq out of proposed DM

range

In the standard according to Italian Law the tone

assessment must be performed in the range

from 20 Hz to 20 kHz. A tone is detected outside

this frequency range

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