Interacoustics AT235 - Transducer Types and Equipment Requirements for Calibration

Service Manual
AT235
27
4.2.1 Transducer types and equipment requirements for calibration
Conduct the same procedure exemplified in Selecting a transducer / how-to-guide can be applied to all the
transducers mentioned below.
TDH39
Fig. 44
Equipment needed for TDH39 calibration
• Measuring amplifier
• Acoustical IEC 60318-3 (IEC 303) coupler
• Frequency counter
• Correction values for coupler
From the AUD menu, select Transducer Calibration.
Place the transducer on the 6cc IEC 60318-3 (IEC 303) coupler
(fig. 44)
EAR3A
Fig. 45
Equipment needed for calibration of EAR3A
• Measuring amplifier
• Acoustical IEC 60318-5 (IEC 126) coupler
• Frequency counter
• Correction values for coupler
• 30° adaptor cable
From the AUD menu, select Transducer Calibration.
Place the transducer on the 2cc IEC 60318-5 (IEC 126) coupler
(fig. 45)