Patient Safety
2-2
2.3 Protective Earthing
To protect both the patient and the operator, the housing of the electrocardiograph must be earthed. The
electrocardiograph is supplied with a detachable 3-prong power cord, which shall be inserted into a grounded
power outlet to connect the electrocardiograph to the earth. If grounded power outlet is not available, contact
the electrician in your hospital.
It is forbidden to connect the 3-prong power cord to a 2-prong power outlet.
Connect the earth wire to the equipotential connector of the electrocardiograph. If you have doubt about
whether devices used together involves any electrical risks, such as risk caused by accumulation of leakage
current, consult an expert in this field to ensure the safety of all devices.
2.4 Equipotential Earthing
The electrocardiograph must be connected to a power supply with protective earthing. For cardiac
examination, the electrocardiograph must be separately connected to an equipotential earthing system.
Connect one end of the equipotential conductor (potential equalization conductor) to the equipotential
connector on the rear panel of the electrocardiograph, and connect the other end to a connector of the
equipotential earthing system. In the event that the protective earthing system is damaged, the equipotential
earthing system can provide protection to the electrocardiograph.
Cardiac examination can only be performed in a room installed with a protective earthing system. Before
each use, check whether the electrocardiograph is in normal working status. Cables connecting the patient to
the electrocardiograph cannot be tainted with electrolyte.
If the protective earthing system is not stable, use the built-in battery to supply power to the
electrocardiograph.
If the use of the instrument is affected by equipotential earthing, contact the Company’s
After-sales Service Department or agents.
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