B&K 2250 Light Instrukcja Użytkownika Pobierz pdf (Strona 202)

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Hand-held Analyzer Types 2250 and 2270 – User Manual

Fig.17.1 G-weighted frequency response

Low Frequency Option BZ-7234, together with BZ-7222, BZ-7223, BZ-7224 or BZ-7225 and

a low-frequency microphone, Type 4193 or Type 4964 (possibly with Low Frequency Adaptor

UC-0211, refer to Table C.5, Note for Type 4193 and Type 4964) measures the following timed

broadband parameters in addition to the standard measured parameters:

• LGeq – G-weighted equivalent continuous noise level

• LG10max – maximum time-weighted sound level measured with G-weighting and 10 s

exponential time constant

• LG10min – minimum time-weighted sound level measured with G-weighting and 10 s

exponential time constant

• LGpeak – maximum peak sound level with G-weighting

• TGpeak – time when the G-weighted peak sound level occurred

The following instantaneous values are also available:

• LG10 – instantaneous time-weighted sound level with G-weighting and 10 s exponential

time constant

• LGpeak,1s – maximum peak sound level with G-weighting during the latest second

17.2 Setting up the Analyzer for G-weighting

1) Mount your low-frequency microphone and low-frequency adaptor (if used) on the

preamplifier and connect it to the top socket (see section 2.5.2). If it is your first time to

use the microphone, it needs to be created in the transducer database (see section 5.8) and

calibrated (see section 5.3).

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