EN-3
Measurement functions:
•
Main processing functions
Sound level: Current time-weighted sound pressure level A or current time-
weighted sound pressure level C
Maximum time-weighted sound pressure level A or Maximum time-weighted
sound pressure level C
•
Total range
: 30 to 130dB A & C weighted
•
Max. measurement level
: 130dB
•
Self-generated noise level:
Typical values at 23
℃
using the nominal microphone equivalent capacitance of 27pF
(30-90dB range)
Weighting Electrical Total
“A” 22.7dB 26.1dB
“C” 21.8dB 29.5dB
Linearity operating range
: A-weighted, 1000Hz, 60dB dynamic range.
Total linear operating range:
In accordance with IEC 61672-1, A-weighted, 1000Hz: 30dB to 130dB.
Level range selection
:
5 ranges in 10dB steps 30 to 90dB , 40 to 100dB
50 to 110dB , 60 to 120dB
70 to 130dB
LINEAR OPERATING RANGES (L.O.R.)
RANGE: 30 – 90 dB. Test starting point 64 dB for all weightings and frequencies except
31.5Hz A-weighted, for which the starting point is 44 dB.
FREQUENCY
Hz
WEIGHTING L.O.R.
dB
WEIGHTING
L.O.R.
dB
31.5 A 36.1 – 50.6 C 39.5 – 87.0
1000 A 36.1– 90.0 C 39.5 – 90.0
4000 A 36.1 – 90.0 C 39.5 – 89.2
8000 A 36.1 – 88.9 C 39.5 – 87.0
RANGE: 40 – 100 dB. Test starting point 74 dB for all weightings and frequencies except
31.5Hz A-weighted, for which the starting point is 54 dB.
FREQUENCY
Hz
WEIGHTING L.O.R.,
dB
WEIGHTING
L.O.R
dB
31.5 A 40.0 – 60.6 C 40.0 – 97.0
1000 A 40.0 – 100.0 C 40.0 – 100.0
4000 A 40.0 – 100.0 C 40.0 – 99.2
8000 A 40.0 – 98.9 C 40.0 – 97.0
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