User manual

312
Appendix
Self-generated Noise with Microphone
(Refer IEC61672-1 paragraphs 5.6.1 to 5.6.4, 9.2.5o)
Self-generated noise with electrical input device @ S = 42 mV/Pa
Frequency-
weighting
Level range [dB]
low mid high
Z 22 23 46
A 11 19 43
C 14 18 42
Self-generated noise with M2230 microphone @ S = 42 mV/Pa
Frequency-
weighting
Level range [dB]
low mid high
Z
23 25 46
A
17 21 43
C
20 22 42
The averaging time is 30 seconds for all measurements.