21
°
at
A
frequency
weighting not
detectable
°
at C frequency weighting
≤
30.0dB
°
at Z frequency weighting
≤
32.0dB
°
at
A
frequency
weighting not
detectable
°
at C frequency weighting
≤
30.0dB
°
at Z frequency weighting
≤
31.0dB
°
at
A
frequency
weighting not
detectable
°
at C frequency weighting
≤
30.0dB
°
at Z frequency weighting
≤
31.0dB
1
2
4
5
6.3
8
10
12.5
16
20
25
135dB
0.07%
0.07%
0.08%
0.08% 0.08% 0.09% 0.09% 0.15% 0.98%
1.9%
1.7%
130dB
0.06%
125dB
0.03%
135dB
0.07%
0.07%
0.07%
0.07% 0.07% 0.07% 0.07%
-
-
-
-
130dB
0.04%
125dB
0.03%
1.6. Influence of operating environment
Influence of static pressure
- 85kPa 108kPa range
0.6dB
- 65kPa 85kPa range
1.1dB
Influence of temperature
0.8dB
Influence of humidity
0.8dB
Influence of vibration see
Appendix
C
conformable to EN 61672-1:2002 specifications (maximum when microphone extension
cable is parallel to field direction)
Influence of electrostatic field
conformable to EN 61672-1:2002
Influence of 80 A/m a.c. power-frequency magnetic field:
- SLM mode (15 – 95dB level range)
- 1/1-octave analyzer mode (5 – 75dB level range, f = 63Hz)
- 1/3-octave analyzer mode (5 – 75dB level range, f = 50Hz)
- Infra G filter mode (25 – 105dB level range)
TBD
1.7. Influence of instrument accessories
Installation of additional equipment does not deteriorate accuracy class of the
instrument, however some influence of this equipment on entire instrument performance can
be detected.
Influence of microphone extension cable its connection to the instrument causes
nonlinear distortion increasing with frequency at high input signal levels – see table below.
f [kHz]
Содержание DSA 50
Страница 17: ...info tursdaletechnicalservices co uk 17...
Страница 18: ...info tursdaletechnicalservices co uk 18 Self generated noise measured with electrical input facility installed...
Страница 19: ...info tursdaletechnicalservices co uk 19 measured with WK 21 microphone installed...
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Страница 51: ...info tursdaletechnicalservices co uk 51 Appendix B Directional responses...
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Страница 53: ...info tursdaletechnicalservices co uk 53 Appendix C Sensitivity to vibration...