CESVA SC-30, User Manual, Page: 7 / 76

SC-30
User’s Manual
5
1. GENERAL FEATURES
The SC-30 is a type-1 integrating-averaging sound level meter that complies with IEC
60651:01 and IEC 60804:00 international regulations and their EU counterparts EN
60651:94/A1:94/A2:01 and EN 60804:00.
The SC-30 is also a spectrum analyser measuring in real time and in octave bands. It covers
a frequency range from 22 Hz and 22,5 kHz with type-1 octave filters, which comply with IEC
61260:1995/A1:01.
1.1 How the instrument works
The SC-30 may be used either as a sound level meter or as a spectrum analyser.
As a sound level meter it simultaneously measures the following functions:
•
The sound pressure level with ‘S’, ‘F’ and ‘I’ time averaging and their maximum and
minimum values during the measurement period.
•
The peak sound pressure level.
•
The sound exposure level, also known as SEL.
•
The equivalent continuous sound pressure level with programmable consecutive
integration time T and its maximum and minimum values, also known as L
eq
.
•
The equivalent continuous sound pressure level or L
eq
during the measurement period.
•
The total percentile levels corresponding to 1, 5, 10, 50, 90, 95 and 99 % of the entire
measurement and the partial levels of each T interval with frequency weighting A.
All these functions are measured simultaneously with the following frequency weightings:
•
Frequency weighting A.
•
Frequency weighting C.
•
Frequency weighting Z (zero): frequency weighting equivalent to 0 dB from 10 Hz to 20
kHz.
As a spectrum analyser it measures the following functions simultaneously and in real time:
•
The equivalent continuous sound pressure level with programmable consecutive
integration time T and without frequency weighting for each octave band centred on
frequencies of 31.5, 63, 125, 250, 500, 1000, 2000, 4000, 8000 and 16000 Hz.
•
The maximum of the peak sound pressure level of the T integration interval for each of the
octave bands.
•
The equivalent continuous sound pressure level of the T integration interval with
frequency weighting A, C and Z.
•
The maximum of the peak sound pressure level of the T integration interval with frequency
weighting A, C and Z.
•
The noise assessment, in real time, using the NC curves criterion and NR curves rating.
See
APPENDIX A
for the names and definitions of each of the functions measured.