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
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)