Svantek SV 977D User Manual

240
SV 977D User Manual - Appendixes
Table C.1.1. Linear operating ranges for the Low measurement range (for the sinusoidal signal and
microphone sensitivity 50 mV/Pa)
[dB]
L
AS/F
L
BS/F
L
CS/F
L
ZS/F
L
AeqT
L
BeqT
L
CeqT
L
AE
L
Cpeak
(t
int
= 2 s)
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
31.5 Hz
23
80
25
103
25
117
30
120
23
80
25
103
25
117
26
83
50
120
500 Hz
23
116
25
119
25
120
30
120
23
116
25
119
25
120
26
119
50
123
1 kHz
23
120
25
120
25
120
30
120
23
120
25
120
25
120
26
123
50
123
4 kHz
23
121
25
119
25
119
30
120
23
121
25
119
25
119
26
124
50
123
8 kHz
23
119
25
117
25
117
30
120
23
119
25
117
25
117
26
122
50
120
12.5 kHz
23
115
25
114
25
114
30
120
23
115
25
114
25
114
26
118
50
117
Table C.1.2. Linear operating ranges for the High (primary) measurement range (for the sinusoidal signal
and microphone sensitivity 50 mV/Pa)
[dB]
L
AS/F
L
BS/F
L
CS/F
L
ZS/F
L
AeqT
L
BeqT
L
CeqT
L
AE
L
Cpeak
(t
int
= 2 s)
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
31.5 Hz
35
97
35
120
35
134
40
137
35
97
35
120
35
134
38
100
70
137
500 Hz
35
133
35
136
35
137
40
137
35
133
35
136
35
137
38
136
70
140
1 kHz
35
137
35
137
35
137
40
137
35
137
35
137
35
137
38
140
70
140
4 kHz
35
138
35
136
35
136
40
137
35
138
35
136
35
136
38
141
70
139
8 kHz
35
136
35
134
35
134
40
137
35
136
35
134
35
134
38
139
70
137
12.5 kHz
35
132
35
131
35
131
40
137
35
132
35
131
35
131
38
135
70
134
Note: For the signals with the crest factor n > 1.41 upper measuring range of the RMS (LEQ and
SPL) is reduced. The valid upper limit can be calculated according to the below given formula:
, where A is the upper limit for the sinusoidal signal
Example: For the crest factor n = 10 the upper limit is A
10
= 120 dB
Table C.1.1. Self-generated noise for selected weighting filters
Electrical *)
Acoustical compensated
Weighting filter
Range
A
C
Z
A
C
Z
Low
< 12 dB
< 12 dB
< 17 dB
< 16 dB
< 17 dB
< 23 dB
High
< 22 dB
< 22 dB
< 26 dB
< 28 dB
< 28 dB
< 33 dB
*) measured with the ST 02 microphone equivalent impedance 18 pF ± 10%, averaging time – 30 s
Measurement ranges
Reference measurement range of the acoustic pressure High
Measuring frequency range of the acoustic pressure (-3 dB) 3.5 Hz ÷ 20 000 Hz.
Basic measurement error of the acoustic pressure < 0.7 dB (measured for the reference
conditions, see below).
( )
2log20137 nA
n
−=

Svantek SV 977D Specifications

General

Brand	Svantek
Model	SV 977D
Category	Measuring Instruments
Language	English