AC40 Service Manual Page 40
Select “Transducer Calibration”
Place the transducer on the IEC 60318-1 coupler (Figure 11)
Figure 11
Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier
(i.e. 80 dB SPL) (Figure 12)
Figure 12
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%
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