MA 1 Operating Manual
12
8100216-3
(D-0100192)
10.
Recalibration
The length of time that an audiometer should be operated before recalibration varies
depending upon the treatment given the instrument and its headset. Generally
speaking, however, it is recommended that the instrument have a laboratory
recalibration at least once a year. Since rough handling can easily cause calibration
errors, it is advisable to establish a biological calibration check as soon as you receive
the instrument.
This can be done as follows:
1.
Make several careful tests of your own hearing, recording the results properly on
the audiogram cards provided with the instrument.
2.
Conduct similar tests with several young adults on whom you will be able to
make subsequent retests, recording these on audiogram cards also.
3.
File these audiogram cards where they will be readily available for comparison
with subsequent retests.
Should you feel at any later date that the audiometer’s calibration may be in error,
proceed to make retests on yourself and the same young adults on whom you made
audiograms previously. If all retests show changes of 10 dB or more in the same
direction at the same frequencies, calibration is probably in error. If repair and
recalibration is needed, be sure the work is done by a Maico Special Instrument Service
Center. This assures the use of quality materials by trained and experienced technicians
using accurate and reliable test equipment.
