GE Carestation 620 User's Reference Manual page 34

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Carestation 620/650/650c (A1)
1-22
• Use of portable phones or other radio frequency (RF)
emitting equipment (that exceed electromagnetic
interference levels specified in IEC 60601-1-2) near the
system may cause unexpected or adverse operation.
Monitor operation when RF emitters are in the vicinity.
• Use of other electrical equipment on or near this system
may cause interference. Verify normal operation of
equipment in the system before use on patients.
2076152-001