Measurement Function enabling calculation of
Level Meter results and 1/3-octave results for sound or
vibration measurements in accordance with Class 1 IEC
61260-1: 2014. 1/3-octave results are presented as a
spectrum plot - a function of result vs central band
frequency and can be saved as a time-history. When the
1/3 Octave function is active the S:1/3 or V:1/3
abbreviation appears in the icon line.
Measurement Function enabling calculation of
Level Meter results and FFT spectrum for sound or
vibration measurements. FFT spectrum is calculated
based on Fast Fourier Transform algorithm and is
presented as a function of signal amplitude vs frequency
and can be saved as a time-history. When the FFT
function is active the S:FFT or V:FFT abbreviation
appears in the icon line.
Measurement Function enabling calculation of
reverberation time in 1/1-octave bands (from 63Hz to
16kHz) or 1/3-octave bands (from 50 Hz to 20 kHz)
including three total RMS levels (A, C and Z weighted).
This analysis is used for building acoustic purposes.
Depend on the type of the sound source used by the user
two methods can be applied: Impulse Response Method
and Interrupted Noise Method. Results are presented for
1/1 or 1/3 octave bands. When the RT60 function is
active the S:RT60 abbreviation appears in the icon line.
Position on the Function screen that opens a screen with
positions allowing to perform calibration or system check
of the instrument: System Check, Calibration by
Sensitivity, Calibration by Measurement, Calibration
History, Clear Calibration History, Auto Calibration and
Post Calibration.
Position in the Calibration screen allowing to perform
system check. ISO 8041 standard advises users to
perform in-situ checks of measuring instruments.
Checking should be carried out immediately before and
after the measurement.
Calibration by
Sensitivity
Type of calibration with the use of microphone’s
published sensitivity information. This calibration doesn’t
perform any calibration measurement and doesn’t
require any calibrator.
Transducer’s sensitivity, given by the producer, which
should be set during the Calibration by Sensitivity. For
microphones the sensitivity is usually given in mV/Pa and
for accelerometers – in mV/ms
-2
.
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