Philips Avalon CTS M2720A, Service Manual

Page: 59 / 110

Safety Tests 6 Preventive Maintenance and Safety
53
S(3): Enclosure Leakage Current Test
- Single Fault Condition (SFC) Open Supply
Test to perform:
The enclosure leakage current: single fault condition open supply is applicable to Class 1 and 2 equipment,
type B, BF, and CF Applied Parts. The test measures leakage current of exposed metal parts of Instrument
Under Test with one supply lead interrupted; it tests normal and reversed polarity.
For type BF and CF Applied Parts measures AP/GND.
Safety Test according IEC 60601-1 (Clause 19.4g).
Report the highest value.
S(4): Enclosure Leakage Current
- SFC Open Earth (Ground)
Test to perform:
The enclosure leakage current: single fault condition open earth (ground) is applicable to Class 1
equipment, type B, BF and CF Applied Parts. The test measures leakage current of exposed metal parts of
Instrument Under Test with Protective Earth open-circuit; it tests normal and reversed polarity.
For type BF and CF Applied Parts the test measures AP/GND.
Safety Test according IEC 60601-1 (Clause 19.4g).
Report the highest value.
(*) Not present in Class 2.
(**) Can be multiple different connections to different equipment at same time.
PE
Instrument under test
Applied part
(*) S4
N (L)
S1
S2
L (N)
Signal parts
in- and/or
output
MD
Medical electrical system
Signal parts
in- and/or
output
Other
Instrument
(**)