Interacoustics AC40 - Selecting HDA280 Headset

AC40 Service Manual Page 43
Selecting HDA280 headset
Select the “Transducer Setup” (Figure 14)
Select “Headset phone” and select HDA280 headset
Enter the serial numbers for the left and right phone in the field “Left” and “Right”
Figure 14
Calibration of HDA280
Equipment needed for the HDA280 calibration:
Measuring amplifier
Acoustical IEC IEC 60318-3 (IEC 303) coupler 
Frequency counter
Correction values for coupler
Spacer for HDA280 to coupler IEC 60318-3 (IEC 303)
30° adaptor cable