Svantek SV 104BIS, Руководство пользователя

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130
SV 104BIS User Manual
Measurement frequency range of the acoustic pressure (-3 dB): 20 Hz
–
10000 Hz
Basic measurement error of the acoustic pressure < 1 dB (measured for the reference conditions, see
below).
Noise exposure values displayed range 0.01Pa 2 h
÷
99.99 Pa 2 h
Noise exposure values displayed resolution 0.01 Pa
2
h
Note: Instrument can measure wider Sound Exposure ( E ) range than displayed. Based on the
measured Leq (dB) value and exposure time T (h) , E = p
0
2
T(10
0.1xLaqe,T
)
Example: For the L
Aeq
= 124 dB and T= 1h exposure value E = 1004 Pa
2
h
Weighting filters
Z meeting requirements of the IEC 61672-1:2013 standard for the Class 1
“
Z
“ filter
A meeting requirement of the IEC 651 and IEC 61672-1:2013 standard for the Class
1 “
A
” filter
C meeting requirements of the IEC 651 and IEC 61672-1:2013 standard for the Class
1 “
C
” filter
Self-generated noise (electrical)
”A” weighting
< 42 dB
”C” weighting
< 41 dB
”Z” weighting
< 50 dB
Self-generated noise (acoustical compensated)
”A” weighting
< 46 dB
”C” weighting
< 48 dB
”Z” weighting
< 58 dB
RMS detector
Digital
“True RMS“ with Peak detection,
Resolution 0.1 dB
Range 327.7 dB
Crest Factor unlimited (for signals in 8 kHz bandwidth).
Overload detector
The instrument has the built-in overload detectors. Both A/D converter and input amplifier overload conditions
are detected. The overload in the measurement channel (in its analogue part) and the overload of the
analogue /
digital converter are both detected. The “overload” indication appears when the input signal
amplitude is 0.5
dB above the declared “Peak measurement range”.
Underrange detector
The instrument has the built-in under-range detector.
The “underrange” indication appears when the RMS
value for the elapsed time is below the lower linear operating range.