Svantek SVAN 971, Руководство пользователя

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SVAN 971 User Manual
– Appendixes
146
Linear operating ranges for LEQ measurements with Diffuse Filter
Table C.1.4. Linear operating range
for the “Diffuse” filter: “LOW” for the sinusoidal signal and microphone
sensitivity 35 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 83 26 106 26 120 32 123 26 83 26 106 26 120 29 86 50 123
500
Hz
26 119 26 122 26 123 32 123 26 119 26 122 26 123 29 122 50 126
1 kHz 26 123 26 123 26 123 32 123 26 123 26 123 26 123 29 126 50 126
4 kHz 26 124 26 122 26 122 32 123 26 124 26 122 26 122 29 127 50 126
8 kHz 26 122 26 120 26 120 32 123 26 122 26 120 26 120 29 126 50 123
12.5
kHz
26 118 26 117 26 117 32 123 26 118 26 117 26 117 29 121 50 120
Table C.1.5. Linear operating range
for the “Diffuse” filter: „HIGH“ (primary level range) for the sinusoidal
signal and microphone sensitivity 35 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 36 97 36 120 36 134 42 137 36 97 36 120 36 134 39 100 60 137
500
Hz 36 133 36 136 36 137 42 137 36 133 36 136 36 137 39 136 60 140
1 kHz 36 137 36 137 36 137 42 137 36 137 36 137 36 137 39 140 60 140
4 kHz 36 138 36 136 36 136 42 137 36 138 36 136 36 136 39 141 60 139
8 kHz 36 136 36 134 36 134 42 137 36 136 36 134 36 134 39 139 60 137
12.5
kHz
36 132 36 131 36 131 42 137 36 132 36 131 36 131 39 136 60 134
Linear operating ranges with the SA 22 windscreen
See C1.2
RMS detector
•
Digital
“True RMS“ with Peak detection,
•
Resolution 0.1 dB
•
Range 327.7 dB
•
Crest Factor unlimited (for signals in 20 kHz band).
Overload detector
The instrument has the built-in overload detectors. The overload in the measurement channel (in its analogue
part) and the overload of the analogue /
digital converter are both detected. The “overload” indication is when
the input signal amplitude is 0.5 dB above
the declared “Peak measurement range”
Underrange detector
The instrument has the built-
in underrange detector. The “underrange” indication appears when the minimum
value of the RMS detector output goes below the specified lower linear operating range