DUKE EASY S.T.01/3AW Rev.0 01/2017
34
INSTRUMENT WATER FILTER
To prevent impurities that are always present in the water mains from jeopardising instrument operation,
the water flows through a filtering pad located near the water pressure regulator (see Figure.
Every 12 to 24 months ask a technician to check the filter for possible clogging during the periodic
overhaul. Replace the bronze sintered pad, if necessary.
FUNCTIONAL SAFETY CHECKS
To guarantee dental unit operating and functional safety, have an authorised OMS technician perform
routine maintenance once a year.
Medical electrical devices are built to guarantee patient, operator or third party safety in the event of
fault. Consequently, the actual level of safety must be periodically checked.
Run periodic safety checks and tests at least once every two years to find any electrical faults (i.e.
damaged insulation) that could reduce the initial level of safety.
These checks should be performed by an authorised OMS technician with suitable tools and equipment
according to specific standards; regulation IEC 62353 is the reference standard for medical electrical
device controls manufactured in accordance with IEC 60601-1.
Periodic checks and tests include visual inspection, grounding connection measures and dispersed
currents; the results and values measured must be recorded in a specific form and kept to demonstrate
device compliance in time (complete with accessories) and to monitor device safety levels.
Technical safety checks must be performed and documented:
- after first start up (installation),
- after repairs or maintenance work,
- during periodic tests.
N.B. Dental unit use is only permitted if all safety checks were passed.
EXTRAORDINARY MAINTENANCE
Some extraordinary maintenance activities are described below and, except for paint touch-ups, we
recommend they all be performed by authorised O.M.S. technicians.
Upon request, O.M.S. will provide all wiring diagrams, component lists, descriptions, calibration
instructions or other information to assist authorised O.M.S. technicians in device repairs.
EXTRAORDINARY MAINTENANCE
Activity
Frequency
By whom?
Note/references
Paint touch-ups
When necessary Trained
operator
Fuse replacement
When necessary Authorised
technician
Refer
to
technical
documentation
Work due to malfunctions, faults or
downtime
When necessary Authorised
technician
Refer
to
technical
documentation
