Mallinckrodt NELLCOR NPB-4000, Service Manual

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Section 3: Performance Verification
3-17
6. Verify monitor is responding to SpO
2
simulator signal and audible alarm is
sounding.
Note: If desired, press the Alarm Silence switch to temporarily silence the
audible alarm.
7. Connect DMM positive lead to pin 9 and verify voltage value listed in
Table 3-3. (Voltage for pin 9 will be that listed for the “alarm underway”
condition.)
3.4 SAFETY TESTS
NPB-4000/C safety tests meet the standards of, and are performed in accordance
with, IEC 601-1, Clause 19 (EN60601-1, Second Edition, 1988; Amendment 1,
1991-11, Amendment 2, 1995-03) and UL 2601-1 (August 18, 1994), for
instruments classified as Class 1 and TYPE CF and AAMI Standard ES1
(ANSI/AAMI ES1 1993).
• 3.4.1 Ground Integrity
• 3.4.2 Electrical Leakage
3.4.1 Protective Earth Continuity
This test checks the integrity of the power cord ground wire from the AC plug to
the instrument chassis ground. The current used for this test is less than or equal
to 6 Volts RMS, 50 to 60 Hz, and 25 Amperes.
1. Connect the monitor AC mains plug to the analyzer as recommended by the
analyzer operating instructions.
2. Connect the analyzer resistance input lead to the equipotential terminal
(ground lug) on the rear of the instrument. Verify that the analyzer
indicates 100 milliohms or less.
3.4.2 Electrical Leakage
The following tests verify the electrical leakage of the monitor:
•
3.4.2.1 Earth Leakage Current
•
3.4.2.2 Enclosure Leakage Current
•
3.4.2.3 Patient Leakage Current
•
3.4.2.4 Patient Source Current (Mains on Applied Part)
•
3.4.2.5 Patient Auxiliary Current