Routine Maintenance
Routine calibration check
The length of time that an audiometer should be operated before re-calibration varies
depending upon the use and treatment of the instrument and its headset. It is
recommended that the instrument be fully calibrated by a certified GSI technician
annually.
It is recommended that a bio
logic calibration check is established as soon as the
in
strument is received.
1.
Make several careful tests of the operator’s hearing and record the results
properly on the audiogram cards provided with the instrument.
2.
Conduct similar tests with several young adults on whom subsequent retests may
be made. Record the results on the audiogram cards.
3.
File these audiogram cards where they will be readily available for comparison
with future results.
If the GSI 18 is to be used to monitor employee thresholds as part of an industrial
Hearing Conservation Program, this “biological listening check” must be done at the
beginning of each day the audiometer is to be used (per CFR 1910.95 Occupational
Noise Exposure, March 8, 1983).
Since individual thresholds can shift up or down as much as 5 dB from one day to the
next, variation within this range may be considered acceptable
.
Variations that exceed
this range, however, are likely to reveal problems that require attention
.
The routine
maintenance checks described in this chapter may suggest the source and solution to
the problem
.
If they do not, the instrument should receive technical service by a
certified technician before further use.
1718-0100 Rev. E 3-3
To Next Page
Loading...
Need help?
General
