Table of Contents
Advertisement
3.3.3.2 Normal Operation
3.3.4
Backlight Test
b. The OXYGEN SATURATION display momentarily indicates the
monitor 3-digit software version. The other displays are not lit.
Note: Software versions may vary depending on the date of manufacture.
The N-20PA will display the letters "PA" in the PULSE RATE display
while the software version is being displayed in the OXYGEN
SATURATION display.
c. The OXYGEN SATURATION display momentarily indicates the letters
"tSt" and the monitor sounds a single tone. The other displays are not lit.
"tSt" verifies that the monitor recognizes that a tester is connected.
d. The OXYGEN SATURATION and PULSE RATE displays indicate
"0," the PULSE SEARCH indicator is flashing, and the PULSE BAR
will start to register the simulated pulse.
e. After a few beats a pulse tone will be heard, and the PULSE SEARCH
indicator will turn off. The OXYGEN SATURATION display indicates
between 79 and 83 and the PULSE RATE display indicates between 37
and 39.
The N-20PA will indicate a "d" in the most significant digit (MSD) of
the OXYGEN SATURATION display when the SRC-2 is connected.
These tests are an overall qualitative check of the system and requires
connecting a live subject to the monitor.
1.
Connect a DS-100A Sensor to monitor.
2.
Place the DS-100A Sensor on the subject as recommended in the N-
20PA Operator's Manual.
3.
Press the MEASUREMENT button to turn on the monitor.
4.
The monitor should stabilize on the subject's physiological signal in
about 10 to 15 seconds. Verify that the saturation value and pulse rates
are acceptable
The electroluminescent backlight illuminates the display in three sections:
1. The main section, that is, the Oxygen Saturation and Pulse Rate display
fields, and the 14-segment pulse rate amplitude indicator;
2. The Low Battery indicator, and
3. Pulse Search indicators each have their own backlight. Each backlight
flashes once during Power-On Self Test.
The ambient light detector is located underneath a small circular window in the
top right corner of the N-20PA display. Under low light conditions, the main
section backlight is switched on. If a Low Battery and Pulse Search indicator is
lit, those individual backlights are also lit.
Performance Verification
3-13
Advertisement
Table of Contents
