Service Manual
AT235
28
4
As of 2020, CIR33 is discontinued as a AD629 accessory. Hence, this information is applicable for previously purchased transducers only
5
Please note that this set-up does not refer to DD45 or DD65 v1
CIR 33
4
Fig. 46
Equipment needed for calibrating the CIR 33
• Measuring amplifier
• Acoustical IEC 60318-5 (IEC 126) coupler, fitted with eartip
10
• Frequency counter
• Correction values for coupler
From the AUD menu, select Transducer Calibration.
Place the transducer on the 2cc IEC 60318-5 (IEC 126) coupler
(fig. 46)
DD65 V2
5
Equipment required:
• Measuring amplifier
• Acoustical IEC 60318-3 (IEC 303) coupler
• Frequency counter
• Correction values for coupler
• Spacer for HDA200 to coupler IEC 60318-3 (IEC 303)
From the AUD menu, select Transducer Calibration.
Place the transducer on the 6cc IEC 60318-3 (IEC 303) coupler
(fig. 47)
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