Philips M3015A - Part 2 Isolating and Solving Instrument Problems

Patient Safety Checks
Testin
g
the Instrument 161
Expected test results:
Single Fault maximum leakage current x2 ≤ 500µA (IEC 60601-1)
≤ 300µA (UL2601-1)
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:
With mains cable, maximum impedance x = 100 mOhms (IEC 60601-1 and UL2601-1)
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.
50 Hz 25 A or 1.5 Ir
Ohm
L (N)
N (L)
PE
Instrument under test
Applied part
Insulating pad
Ri
6V
(*)
(*) If equipotential connection present : measure also
with yellow/green E.P. conductor connected.