Safety Tests - Mallinckrodt NELLCOR NPB-195 Service Manual

3.3.3.2.2 Operation with a Live Subject
3.4

SAFETY TESTS

3.4.1 Ground Integrity
7. Slowly move the sensor LED in proximity to the photodetector element of
the sensor. Verify, as the LED approaches the optical sensor, that the LED
intensity decreases.
8. Open the sensor and notice that the LED intensity increases.
9. Repeat step 7 and the intensity will again decrease. This variation is an
indication that the microprocessor is in proper control of LED intensity.
10. Turn the NPB-195 off.
Patient monitoring involves connecting the monitor to a live subject for a
qualitative test.
1. Ensure that the monitor is connected to an AC power source.
2. Connect an EC-4 or EC-8 sensor extension cable to the monitor.
3. Connect a Nellcor Durasensor® oxygen transducer, model DS-100A, to the
sensor input cable.
4. Clip the DS-100A to the subject as recommended in the sensor's directions
for use.
5. Press the Power On/Standby button to turn the monitor on and verify that
the monitor is operating.
6. The monitor should stabilize on the subject's physiological signal in about
15 to 30 seconds. Verify that the oxygen saturation and pulse rate are
reasonable for the subject.
NPB-195 safety tests meet the standards of, and are performed in accordance
with, IEC 601-1 (EN 60601-1, 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 BF and AAMI Standard ES1 (ANSI/AAMI ES1
1993).
• Ground Integrity
• Electrical Leakage
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 < 6V RMS 50 or
60 Hz and 25 A.
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
(grounding lug) on the rear panel of the instrument. Verify that the analyzer
indicates 100 milliohms or less.
Section 3: Performance Verification
3-9