Measurement Function enabling calculation of
broad band (Level Meter) and two additional
measurement results: LR15 and LR60, which are
calculated as LEQ during last 15 or 60 minutes of
measurement.
Because the 'accuracy' of the electronic
components can drift so the instrument should be
calibrated from time to time by a competent
laboratory. Because the sensitivity of the
microphone and accelerometer is a function of the
temperature, ambient pressure and humidity and
when the absolute sound pressure level value is
important, the absolute calibration of the
measurement channel should be performed in-field.
Manual
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źródła
odwołania.
Calibration by
Measurement
Type of calibration based on the reference signal
measurement with the use of an sound calibrator.
Level of the reference signal generated by used
calibrator.
Measured by the instrument reference signal level
without calibration factor correction.
Difference between the reference signal level and
the measured level. The calibration factor is always
added to the results and measurement range limits.
Difference between the Calibration Level and the
Calibration Result (calculated in dB).
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