Quest Engineering 215 - Page 7

, ¸¸ ' fi/./_ _,_: ._: ..... ,
Figure 3, 215 Sound Level Meter Block Diagram
Selection of Weighthlg Clmr_leLeristies
Tht_ Model 215 offers /% B, and C weighting scales as ,,veil as
linear (non.weighted) response. In most eases the scale selected will
be specified by the test being n'mdc or the reguhg_ion being followed,
For example, most industrial noise regulations require "A" scale
measuren'_enL_. The linear scale can be used wheJ1 the Model 215 is
being used with a tape recorder or a real time analyzer. The standard
wcighth_g characteristics for the Mode] 215 arc shown in Figure ,l,
0 Li ...... I_--
--10
m i20 i
I
-00 l-t=
-50
20 50 100 200 500 1000 2000 5000 10,000
Figure 4, FreqLmncy Respmlse Weighting Characteristic
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