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• Standard maintenance and device calibration operations are to be regularly performed at one-
year intervals. Standard maintenance operations cover the inspection of the transducer cable
conditions, of the mains power supply cable, of the earphone pads as well as an inspection
check to ensure the device’s outer section and/or cabinet are in good working order. All device
calibration operations must be strictly performed only by qualied technical personnel, duly
authorized by the manufacturer and implementing the appropriate apparatus for checking the
levels and frequencies of all the output signals by the transducers supplied on-issue with the
device. Once device calibration testing using the special purpose apparatus is complete, it is
necessary to run a device function test.
• The R27A/R37A device can be used combined with a soundproof or silent cabin as per the
ambient condition requirements suitable for audiometric testing. Prior to connecting the device,
check to ensure that the sockets are compatible with the device features.
• Device calibration is warranted by the manufacturer only if the transducers implemented are
directly connected to the device. Should transducers be connected to the device through the
inter-positioning or insertion of extension cables and/or interconnection sockets, as may be the
case in the event of connections to soundproof cabins, it is necessary to rst proceed with unit
recalibration prior to using the device.
• In the event of replacement of transducers and/or other device components, exclusive use
of Resonance Original spares supplied directly by the manufacturer is highly recommended.
Whenever transducers are replaced, recalibration of the device by qualied technical personnel
is necessary.
• The device is provided with a lithium battery type CR2032 which enables constant updating of
the date and time data displayed by the device. Said battery is welded onto the device PCB and
possible replacement thereof must strictly be performed only by qualied technical personnel.
Failure to observe this instruction may result in damages during battery replacement, thus
preventing correct display of the date and time data by the device.
• Blown fuses must be replaced only with the same type of fuses, as specied on the device itself.
Daily Weekly
• Presence of signals in the transducers
provided
• Cushions cleanness
• Good condition of all accessories cables and
related jack-plugs
Monthly Annually
• General device condition
• Cushions condition
• Perform calibration and routine
maintenance check
Maintenance and cleaning schedule
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