Interacoustics AC40 - Page 37

AC40 Service Manual Page 37
Select “Transducer Calibration”
Place the transducer on the 6cc IEC 60318-3 (IEC 303) coupler (Figure 7)
Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier
(i.e. 90 dB SPL) (Figure 8)
Figure 8
Note: Remember to add or subtract the correction for your microphone
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, for both left and right transducer.
Figure 7