AC40 Service Manual Page 44
Select “Transducer calibration”
Place the transducer on the 6cc IEC 60318-3 (IEC 303) coupler (Figure 15)
Figure 15
Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier
(i.e. 90 dB SPL) (Figure 16)
Figure 16
Note: Remember to add or subtract the correction for your microphone
Check the frequency accuracy with a frequency counter. The Press “Next”, when the calibration level is
obtained, to get the next frequency Repeat “Next” until all stimuli is calibrated, for both left and right
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