Philips M3000A, Руководство по обслуживанию

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Installing an Additional Display
Installing the Instrument 91
Patient Vicinity
Medically-
Used Room
Outside
Medically-
Used Room
Action Required Following Earth
Leakage Current Measurement
(See Table above)
Result 1 Result 2 Result 3
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).
No action
required
Additional
protective
earth
OR
separation
device
required
Separation
device
required
Here the patient monitor is connected to a non-
medical device (display) that is outside the patient
vicinity, but within the medically-used room.
No action
required
Additional
protective
earth
OR
separation
device
required
Separation
device
required
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.
It is recom-
mended to
us a sepa-
ration
device,
even if the
measured
enclosure
leakage
current
does not
exceed the
value laid
down by
IEC 60601-
1-1
Separation
device
between
the medical
device and
the non-
medical
device
required Separation
device
between
the medical
device and
the non-
medical
device
required
Key: PE = Protective
Earth
(V) = Potential difference
between different localities
> < = Separation device
A
B
PE
PE
A
B
PE PE
A B
PE
(V)
> <
PE