Svantek SV 971A, Руководство пользователя

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SV 971A User Manual
– Appendixes
261
Note: For the conformance acoustical tests with SA 271A, the Microphone compensation must
be switched On and the Field Compensation must be set to Environment or Airport (path:
<Menu> / Measurement / Comp. Filter).
Statement of performance
SV 971A working as the SLM with SA 271A meets requirements of IEC 61672:2013 for the Class 1 Group X
instruments.
Linear operating ranges with the Environment filter
The starting point at which tests of level linearity shall begin is 94.0 dB for the frequencies specifies below. For
the
Low measurement range and A weighting linearity test at 31.5 Hz, the starting point is 79 dB.
Table C.5.1. Linear operating ranges for the Normal measurement range and the Environment filter (for the
sinusoidal signal and microphone sensitivity in the range 32 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 29 97 29 120 29 134 36 137 29 97 29 120 29 134 32 100 55 137
500
Hz 29 133 29 136 29 137 36 137 29 133 29 136 29 137 32 136 55 140
1 kHz 29 137 29 137 29 137 36 137 29 137 29 137 29 137 32 140 55 140
4 kHz 29 138 29 136 29 136 36 137 29 138 29 136 29 136 32 141 55 139
8 kHz 29 136 29 134 29 134 36 137 29 136 29 134 29 134 32 139 55 137
12.5 kHz 29 132 29 131 29 131 36 137 29 132 29 131 29 131 32 135 55 134
Table C.5.2. Linear operating ranges for the Low measurement range and the Environment filter (for the
sinusoidal signal and microphone sensitivity in the range 32 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 26 80 26 103 26 117 31 120 26 80 26 103 26 117 29 83 51 120
500
Hz
26 116 26 119 26 120 31 120 26 116 26 119 26 120 29 119 50 123
1 kHz 26 120 26 120 26 120 31 120 26 120 26 120 26 120 29 123 50 123
4 kHz 26 121 26 119 26 119 31 120 26 121 26 119 26 119 29 124 50 123
8 kHz 26 119 26 117 26 117 31 120 26 119 26 117 26 117 29 122 50 120
12.5 kHz 26 115 26 114 26 114 31 120 26 115 26 114 26 114 29 118 50 117
Table C.5.3. Self-generated noise for different weighting filters
Electrical *) Acoustical compensated
Weighting filter
Range
A C Z A C Z
Low < 15 dB < 15 dB < 20 dB < 16 dB < 16 dB < 21 dB
Normal < 26 dB < 26 dB < 31 dB < 27 dB < 27 dB < 31 dB
*) measured with the ST 03 microphone equivalent impedance 18
pF ± 10%