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Operator Responsibilities for Maintenance 9
© Siemens, 2009 M7-000.664.01.04.02 Page 9 of 14 MAGNETOM
03.12 CS SD MR
Leakage Current Measurements
National regulations have to be observed, e.g. IEC 62353/DIN EN 62353 in Germany.
Instructions for Measuring Equipment Leakage Current
According to IEC 62353, DIN EN 62353, it is not necessary to measure the equipment leak-
age current.
Reasons:
•
the protective conductor is permanently connected
•
compliance with the on-site protective standards , e.g. DIN VDE 0100-710, are
described in the planning documents. The system owner has to comply with the on-site
protective standards .
•
The protective conductor is checked at regular intervals and if required after repair and
service-related activities.
Instructions for Measuring the Patient Leakage Current at the Patient Table
Patient Table (type B part is applied)
It is not necessary to measure the patient leakage current at the patient table.
Reasons:
•
applied part has a non-conducting surface,
•
live parts are separated by metallic components with a protective conductor connection,
as per IEC 60601-1, section 17.a.2 (2nd edition), and section 8.5.2 (3rd edition).
Instructions for measuring the Patient Leakage Current at the MR Local Coils
Local Coils (type B or BF part is applied)
It is not necessary to measure the patient leakage current at the local coils.
Reasons:
•
applied part has a non-conducting surface,
•
the live parts are separated from the applied part by a power supply with double
insulation (2 MOPP),
•
applied part does not have dangerous voltages, as per IEC 60601-1, section 17.a.3 and
17.a.4 (2nd edition), and section 8.5.2 (3rd edition).