AC40 Service Manual Page 58
Select “Transducer Calibration”
Place the transducer on the artificial mastoid. (Figure 31)
Figure 31
Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier
(i.e. 80 dB SPL) (Figure 32)
Figure 32
Note: Remember to add or subtract the correction for your Mastoid
Check the frequency accuracy with a frequency counter. The accuracy has to be better than ±1%
Press “Next”, when the calibration level is obtained, to get the next frequency
Repeat “Next” until all stimuli is calibrated.
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