Nellcor OxiMax N-550, Operator'S Manual, Page: 76 / 104

Troubleshooting
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6. The letters EEE, followed by a number, appear on the display.
• This is an error code. To confirm, press the Power On/Off
button to turn the monitor off, then press the button again to
turn it back on. If the display shows the error code once
again, record the number and provide that information to
qualified service personnel, or your local Nellcor
representative.
• Error Code “EEE 513" is displayed when the battery is
discharged to a critically low level. Turn the monitor off and
let it charge for about 10 minutes and then turn the unit back
on. If the error code is still present, turn the unit off and let it
continue to charge. If the monitor has been charged for 30
minutes and the error code is still present, notify service
personnel.
Refer to the N - 550 service manual for a complete listing of error
codes.
EMI (Electro-magnetic Interference)
CAUTION: This device has been tested and found to comply with
the limits for medical devices to the IEC 60601-1-2, EN60601-1-2,
and the Medical Device Directive 93/42/EEC. These limits are
designed to provide reasonable protection against harmful
interference in a typical medical installation.
However, because of the proliferation of radio - frequency transmitting
equipment and other sources of electrical noise in health care
environments (for example, electrosurgical units, cellular phones,
mobile two
- way radios, electrical appliances, and high - definition
television), it is possible that high levels of such interference due to
close proximity or strength of a source may result in disruption of
performance of this device.
The N - 550 is designed for use in environments in which the pulse can
be obscured by electromagnetic interference. During such
interference, measurements may seem inappropriate or the monitor
may not seem to operate correctly.