AEC206 Reference Manual
Performing Calibration
1-6
1.4 Performing Calibration
There are several ways the system is calibrated:
TEDS
The AEC304 is equipped with TEDS sensors. TEDS (Transducer Electronic
Data Sheet) sensors allow TEDS enabled analyzers to automatically read
sensitivity data from the sensor.
Factory Calibration
Periodically the AEC206 is shipped to Larson Davis for factory calibration.
An alternative method for factory calibration is to remove the AEC304 and
paired 426M11 and ship to Larson Davis, then reassemble when returned.
This alternate method calibrates the AEC304 and 426M11 only, it does not
verify that the unit complies with isolation test as described in ISO 4869-3.
For information on removal, see 2.3.2 "Removing Ear Simulator and
Preamplifier" on page 2-4.
Acoustic Calibration
A technician performs a manual acoustic calibration at the beginning and
end of the day (or test) to ensure the test was performed accurately.
The following procedures describe an acoustic calibration:
Step 1
Ensure the ADP105 adaptor is securely on the CAL250.
TAKE NOTE
Unless you use the
CAL250 on another device,
there is no need to remove the
adapter between use.
Step 2
If pinna and ring are installed, remove prior to calibration.
See “Removing Artificial Pinna” on page 2-3.
Step 3
Place calibrator over the microphone. Gently secure the
gasket-tight connection with a push.
FIGURE 1-6
Calibration Setup
Step 4
Turn calibrator on by pressing the button.
TAKE NOTE
The CAL250 will run
for 60 seconds after you turn it
on.
Step 5
Run the calibration process on the connected analyzer.
Step 6
When the calibration is complete, position your hand on the
bottom half of the calibrator, and then bend it up or down
about ten degrees, then pull outward. Do not pull outward
