Audio Traveler AA222, Operation Manuals, Page: 102 / 141

AA222 Operation Manual Page 102
Trouble Shooting
Data is not transmitted to the computer:
The correct COM port must be selected in the computer, and
this COM port must be chosen in the computer program.
The baud rate in the computer program must be set to USB.
The USB driver must be installed on the PC. Please refer to
“Appendix B” of this manual for instructions.
No Tymp curves are drawn:
The probe system has to make a perfect seal to the ear canal.
This has not been obtained if the display shows "Leaking" or
"Blocked" and the indication light on the probe is yellow. A
perfect seal is indicated with a green light on the probe.
Check if the transducer / probe system is connected on the
connection panel of AA222.
The small rubber tube of the probe cable must be connected
on the connection panel of AA222.
"Blocked" is displayed in Tymp mode:
The probe is blocked at the ear tip, either by wrong insertion
into the ear canal, or by cerumen. Any accumulated cerumen
at the probe tip opening should be removed very carefully.
Please refer to the chapter "Cleaning Probe and Ear tips" of
this manual for details.
Test starts despite a blocked ear tip:
The instrument must warm up for 10 minutes for calibration to
be accurate.
If the problem is still present a calibration of this feature by
means of a 0.2ml cavity calibrator is needed to match the
altitude related air pressure of the installation site. This is a job
for a technician.