Appendix:
General Maintenance Procedures
The performance and safety of the instrument will be kept if the
following recommendations for care and maintenance are observed:
− It is recommended to let the instrument go through at least one
annual overhaul, to ensure that the acoustical, electrical and
mechanical properties are correct. This should be made by an
authorised workshop in order to guaranty proper service and
repair.
− Do not site the instrument next to a heat source of any kind, and
allow sufficient space around the instrument to ensure proper
ventilation.
− To ensure that the reliability of the instrument is kept, it is
recommended that the operator at short intervals, for instance
once a day, perform a test on a person with known data. This
person could be the operator him/herself.
− If the surface of the instrument or parts of it are contaminated, it
can be cleaned using a soft cloth moistened with a mild solution
of water and dish washing cleaner or similar. The use of organic
solvents and aromatic oils must be avoided. Always be careful
that no fluid is entering the inside of the instrument or the
accessories.
− After each examination of a patient, it should be ensured that
there is no contamination on the parts in connection with the
patient. General precautions must be observed in order to avoid
that disease from one patient is conducted to others. If ear
cushions or eartips are contaminated, it is strongly recommended
to remove them from the transducer before they are cleaned. By
frequent cleaning water should be used, but by severe
contamination it may be necessary to use a disinfectant. The use
of organic solvents and aromatic oils must be avoided.
− Great care should be exercised by the handling of earphones and
other transducers, as mechanical shock may cause change of
calibration.
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