PCE Health and Fitness DSA 50, Руководство пользователя

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If A frequency weighting is selected, then following quantities are measured additionally:
LASmx maximum RMS, A-frequency-weighted, S-time-weighted sound
l l
LAeq time-average A-frequency-weighted sound level,
LCMPk maximum peak C sound level.
1.4.3. 1/3-octave analyzer mode
1/3-octave analyzer contains twenty nine digital 1/3-octave band filters having exact
centre frequencies specified for binary octave ratio. Nominal centre frequencies are 25Hz,
31.5Hz, 40Hz,50Hz, 63Hz, 80Hz, 100Hz, 125Hz, 160Hz, 200Hz, 250Hz, 315Hz, 400Hz,
500Hz, 630Hz, 800Hz, 1kHz, 1.25kHz, 1.6kHz, 2kHz, 2.5kHz, 3.15kHz, 4kHz, 5kHz, 6.3kHz,
8kHz, 10kHz, 12.5kHz and 16kHz. Specifications of filters conform to Class 1
requirements of EN 61260:1995 and EN 61260:1995/A1:2001.
Following quantities can be measured simultaneously for each filter centre frequency (and
also for wide-band response), when one frequency weighting is selected among from
three available weightings (A, C and Z) and when one time weighting is selected
among from two available weightings (F and S):
L current RMS sound level,
Leq
time-average sound level.
1.4.4. Infra G filter mode
Following quantities can be measured simultaneously:
LGS current RMS, G-frequency-weighted S-time-weighted sound level,
LGSmn minimum RMS, G-frequency-weighted S-time-weighted sound
LGSmx maximum RMS, G-frequency-weighted S-time-weighted sound
LIPk current peak sound level in infrasound band,
LIMPk maximum peak sound level in infrasound band,
LGeq G-frequency-weighted time-average sound level.
1.5. Specifications
DSA-50 digital sound analyzer conforms to requirements of following standards:
&
EN 61672-1:2002
Electroacoustics – Sound level meters – Part
1: Specifications.
&
EN 61260:1995/A1:2001
Electroacoustics – Octave-band and fractional-
octave- band filters.
&
ISO 7196:1995
Acoustics – Frequency-weighting characteristic for
infrasound measurements.
DSA-50 conforms to electromagnetic compatibility (EMC) requirements specified
in EN 61672-1:2002 for X group instruments.