S(2) Protective Earth Continuity - Philips M3001A Service Manual

Expected test results:
Measures leakage current of exposed metal parts of Instrument under Test (IUT) with
Protective Earth (PE) open circuit (S4 = open) and between parts of the system within the
patient environment; normal and reversed polarity using S2.
Reporting safety test S(1) in the Service record
S(1):P/x1/x2
or
S(1):F/x1/x2
where P = Pass, F = Fail and x1, x2 are the values defined in the two tests described above.

S(2) Protective Earth Continuity

Expected test results:
Measures impedance of Protective Earth (PE) terminal to all exposed metal parts of
Instrument under Test (IUT), which are for safety reasons connected to the Protective Earth
(PE). Test current 5 Amp applied for 5 to 10 seconds.
Testing the Instrument
Single Fault maximum leakage current x2 ≤ 500µA (IEC 60601-1)
Ri
Ohm
6V
50 Hz
With mains cable, maximum impedance x = 100 mOhms (IEC 60601-1 and UL2601-1)
≤ 300µA (UL2601-1)
Instrument under test
L (N)
N (L)
PE
(*)
Insulating pad
25 A or 1.5 Ir (*) If equipotential connection present : measure also
with yellow/green E.P. conductor connected.
Patient Safety Checks
Applied part
161