Operating Instructions MA 42
Operating_Instructions_8100460-6_MA42_e_15a
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3.2 Calibration of the device
The instrument, headphones, bone conductor as well as the optional insert
phone and loudspeaker match one another and have the same serial number
(e.g. 0021520). Because they have been calibrated with this particular
instrument, use of other transducers is not allowed. If one of the acoustic
transducers is replaced, the instrument must be recalibrated.
The use of non-calibrated audiometers can lead to incorrect results!
3.3 Where to setup
The MA 42 should be operated in a quiet room, so that the audiometric
examinations are not influenced by outside noises. Ambient sound pressure
levels in an audiometry test room shall not exceed the values specified in the
norm ISO 8253-1 or ANSI S3.1-1999. For use in noisier environments
headphones with optional sound insulation muffs are available.
Electro-medical instruments which emit strong electromagnetic fields (e.g.
microwaves - radiotherapy devices) can influence the function of the
audiometer. Therefore the use of these instruments is not allowed in close
proximity to the audiometer.
The test room must be at normal temperature, usually 15
°
C / 59
°
F to 35
°
C /
95
°
F, and the instrument should be switched on about 10 minutes before the
first measurement to guarantee precise measuring results. If the device has
been cooled down (e.g. during transport), please wait until it has warmed up
to room temperature.
Caution: External devices such as a computer, printer or Ethernet which
are connected to the device must meet electrical safety requirements,
such as IEC/EN 60601-1 or UL 60601-1. This is to avoid electrical shock to
the user or the patient.
Summary of Contents for MA 42
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