NTi Audio Acoustilyzer AL1 - Manual (Page 62)

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Calibration
In order to obtain correct measurement results, the sensitivity of the micro-
phone connected to the AL1 must be set and calibrated accordingly. The
microphone sensitivity is set by default to the NTi Audio MiniSPL measure-
ment microphone factory adjustment 20mV/Pa. MiniSPL is the standard
measurement microphone for the Acoustilyzer AL1. Together they form a
comprehensive class 2 acoustical analyzer.
Alternatively to the MiniSPL, the NTi Audio M2010 class 1 frequency response
microphone can be used for highly accurate class 1 measurements.
Microphone
Sensitivity
Microphone Balance Indicator,
arrow has to be centered to verify
the balanced mic input singal
Default
Factory Setting
Manual Calibration with
external microphone calibrator
The following three calibration modes are available:
DEFAULT
All MiniSPL microphones are factory
calibrated to a sensitivity of 20.0 mV/Pa.
Reset to default setting by:
• Select DEFAULT
• Press the enter key