MSA SUPREME 75301 Mode D'emploi page 33

harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harm-
ful interference to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to radio or televi-
sion reception, which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna of the disturbed device.
- Increase the separation between the equipment and receiver.
- Consult the dealer or an experienced radio/TV technician for help.
Warning:
Changes or modifications made to this equipment not expressly approved by MSA Sordin AB may void
the FCC authorization to operate this equipment.
THE FOLLOWING SUPPLEMENTARY INFORMATION APPLIES ONLY TO VERSIONS 75328 & 76328:
Connection
The product has a down lead and adapter for connecting an external acoustic source, e.g.: communi-
cation radio, hunting radio, mobile phone. Refer to the operating instructions for the external audio
equipment to ensure that it is correctly connected. The impedance of the product is 32 Ohms. The cir-
cuit must not be subjected to a signal greater than 5 volts to prevent permanent damage. If the audio
signal level does not exceed: 242 mVrms (rms =root mean square of signal strength), the sound pres-
sure level inside the hearing protector will not exceed 82 dB(A). Note! Please see Table 1 for more
detailed information.
Boom microphone (figure J)
The hearing protector is equipped with an adjustable electret microphone. The microphone is noise
compensating, which ensures very good voice perception even in noisy environments. Note! It is
important that the head of the microphone is positioned close to your mouth, about 2-5 mm from your
lips, in order for noise compensation to work well. To prevent interference from wind noise we recom-
mend that the accompanying windshield is used.
MAINTENANCE
The outside of the muff and the cushion can easily be cleaned with soap and water. Earmuffs and in
particular cushions may deteriorate with use and ageing and should be inspected regularly for cracks
and leakage. The cushions are filled with foam or gel and are replaceable. Worn or damaged parts are
easily replaced (figure B). Use only hygiene kits from the manufacturer, designed for electronics, order
number 60089 or 60092 . The hygiene kit should be replaced at least twice a year for standard use to
ensure that the noise attenuation performances are maintained. This product may be adversely affected
by certain chemical substances. Further information should be sought from the manufacturer.
The user must ensure that the hearing protector:
– fits properly and is adjusted and maintained in compliance with our instructions
– is used all the time in noisy environments
– is inspected regularly to ensure good condition.
Moisture may occur inside the hearing protector muffs if used for long periods. To avoid long term
affects of moisture on the electronic components it is recommended that the acoustic inserts are regu-
larly removed to allow the muffs to dry, e.g., overnight (figure B). When removing the cushion and insert
take great care not to touch the electronics board or cables. Changes in position of cables could cause
disturbance in the system. Do not subject the hearing protector to rough handling, which can damage
the electronics.
The earmuffs must not be immersed in water!
STORAGE
When the hearing protector is not in use, the headband or neckband should not be extended or the
cushions compressed. Keep the muffs dry and clean and keep them in normal room temperature. Do
not allow the hearing protector to lie in direct sunlight. If the product is to be stored for a longer peri-
od it is recommended that the batteries be removed from the battery holder to prevent damage. If the
above recommendations for the hearing protectors are not adhered, the attenuation values ability
could deteriorate considerably.
LIMITED TROUBLE SHOOTING/CARE ADVICE
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