Svantek SV 971A User Manual

SV 971A User Manual – Appendixes
287
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.
Lday
Lday is calculated for: T
d
≠ 0, T
e
= 0,
T
n
= 0.
( )
( )








=

d
T
2
0W
d
dtptr
T
1
log10Ld
Leve
Leve is calculated for: T
d
= 0, T
e
≠ 0,
T
n
= 0.
( )
( )








+=

e
T
2
0W
e
dtptr
T
1
log01dB5Le
Lnight
Lnight is calculated for: T
d
= 0, T
e
= 0,
T
n
≠ 0.
( )
( )








+=

n
T
2
0W
n
dtptr
T
1
log01dB10Ln
Lde
Lde is calculated for: T
d
≠ 0, T
e
≠ 0,
T
n
= 0.
( )






+
+
=
10Le10Ld
1041012
412
1
log10Lde
Len
Len is calculated for: T
d
= 0, T
e
≠ 0,
T
n
≠ 0.
( )






+
+
=
10Ln10Le
108104
84
1
log10Len
Lnd
Lnd is calculated for: T
d
≠ 0, T
e
= 0,
T
n
≠ 0.
( )






+
+
=
10Ld10Ln
1012108
128
1
log10Lnd
Lden
Lden is calculated for: T
d
≠ 0, T
e
≠ 0,
T
n
≠ 0.
( )






++
++
=
10Ln10Le10Ld
1081041012
4812
1
log10Lden
LEPd
Daily Personal Noise Exposure is the
noise exposure level for a nominal 8-hour
working day. The LEPd result is
calculated on the base of the LEQ
h8
T
T
log10LeqLEPd
e
+=
Ltm3 and Ltm5
The Ltm3 and Ltm5 results (Takt-Maximal Levels) are calculated according to the
German standard TA Lärm.

Svantek SV 971A Specifications

General

Brand	Svantek
Model	SV 971A
Category	Measuring Instruments
Language	English