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Philips M3001A Service Manual Page 107

M3/m4 monitors,measurement server,measurement server extensions.
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Patient Vicinity
A
PE
Here the patient monitor is
connected to a non-medical device
(display), and both pieces of
equipment are within the patient
vicinity (within 1.5m of the patient).
A
PE
Here the patient monitor is connected to a non-
medical device (display) that is outside the patient
vicinity, but within the medically-used room.
A
PE
Hazardous situations may occur if the signal line of the patient
monitor is connected to equipment outside of the medically-used
room (for example, in another building with a different mains supply
circuit).
A separation device (for example, an separation transformer)
included in the signal line prevents a hazard to the patient or user. It
should be placed as near as practicable to the medical electrical
equipment. The inclusion of a separation device also helps to avoid
hazards through malfunction of equipment caused by unwanted
ground loop currents flowing through the signal line.
Key:
PE = Protective
Installing the Instrument
Medically-
Used Room
B
PE
B
PE
>
<
(V) = Potential difference
Earth
between different localities
Action Required Following Earth
Outside
Leakage Current Measurement
Medically-
Used Room
Result 1
No action
required
No action
required
It is recom-
B
mended to
us a sepa-
ration
(V)
device,
even if the
PE
measured
enclosure
leakage
current
does not
exceed the
value laid
down by
IEC 60601-
1-1
> < = Separation device
Installing an Additional Display
(See Table above)
Result 2
Result 3
Additional
protective
Separation
earth OR
device
separation
required
device
required
Additional
protective
Separation
earth OR
device
separation
required
device
required
Separation
Separation
device
device
between
between
the medical
the medical
device and
device and
the non-
the non-
medical
medical
device
device
required
required
91

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