Svantek SV 200A User Manual

196
SV 200A User Manual
L(A/C/Z)(S/F/I)
Time weighted sound level (SPL) expressed
at observation time, expressed in dB, for
frequency weightings A, C, Z and time
weightings F, S, I symbols are LAF, LAS,
LCF, LCS etc.
( )








=

2
0
2
W
p
tp
log10L
L(A/C/Z)eq
Time averaged equivalent continuous sound
level (Leq) expressed in dB, for frequency
weightings A, C, Z symbols are LAeq, LCeq
and LZeq. In principle time weighting is not
involved in a determination of time averaged
sound level. Time-averaged sound level is
calculated for current time period of the
measurement (T).
( )
( )








=

T
0
2
0
dtptr
T
1
log10Leq
L(A/C/Z)E
Sound Exposure Level (SEL) expressed in
dB, for frequency weightings A, C, Z,
symbols are LAE, LCE and LZE. SEL is
essentially the subset of the Leq result. Its
value is equal to the Leq result referred to the
integration time equal to one second (so, for
the Integration time equal to 1 s, SEL is
always equal to Leq).
( )
( )
s1
T
log10Leqdtptrlog10SEL
T
0
2
0
+=








=

L(den)
Only one result from: Ld, Le, Ln, Lde, Len, Lnd, and Lden is available in the
instrument. It depends on the day and night time in which the measurement was
performed. Day and night time depend on the <Day Time Limits> option (6h-18h or
7h-19h).
If <6h-18h> option is selected for the <Day Time Limits> in the instrument then:
T
d
(day-time) starts from 6 am and ends at 6 pm,
T
e
(evening-time) starts from 6 pm and ends at 10 pm,
T
n
(night-time) starts at 10 pm and ends at 6 am.
If <7h-19h> option is selected for the <Day Time Limits> in the instrument then:
T
d
(day-time) starts from 7 am and ends at 7 pm,
T
e
(evening-time) starts from 7 pm and ends at 11 pm,
T
n
(night-time) starts at 11 pm and ends at 7 am.
Ld
Ld is calculated for: T
d
≠ 0, T
e
= 0, T
n
= 0.
( )
( )








=

d
T
2
0W
d
dtptr
T
1
log10Ld
Le
Le is calculated for: T
d
= 0, T
e
≠ 0, T
n
= 0.
( )
( )








+=

e
T
2
0W
e
dtptr
T
1
log01dB5Le

Svantek SV 200A Specifications

General

Brand	Svantek
Model	SV 200A
Category	Measuring Instruments
Language	English