The procedure
1. Launch OTOsuite and select the
HIT
module in the
Nav-
igation
panel.
2. Select
Tools
> AURICAL HIT
Calibration
>
More
>
Coupler Microphone
.
3. Screw the ½ in microphone adapter onto the coupler
microphone.
4. Place the sound level calibrator on the coupler micro-
phone and place it in the high position in the test cham-
ber.
5. Switch on the calibrator.
6. Close the lid.
7. Click
Start
.
8. Follow the on-screen instructions carefully.
9. When you have calibrated the coupler microphone, you
should calibrate the reference microphone. See
ibrating the reference microphone
5.4
The battery simulator
A 1/8” stereo jack supplies direct current from AURICAL HIT to a battery which is inserted into the battery compartment
of the hearing instrument during testing.
The voltage and source impedance of the battery simulator are controlled by the test software and the current can be
measured by the simulator and the software.
Five different battery pills are available as optional accessories (see
for details).
Voltage range
0 to 3.5 V
Current range
0 to 50 mA
Source impedance range
0 to 25.5
Ω
.
Tip
Battery supply
Ring
Sense voltage
Shield
Ground
Otometrics - AURICAL HIT
37
5 Cleaning, Repair and Calibration
