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N-550B
Figure 5: Adjusting Low %SpO
8. Press the SpO
Alarm Limit button two times rapidly. Within three
2
seconds, press and hold the Adjust Down button and verify that the
display reduces to a minimum of "20." Press and hold the Adjust
%SpO
2
Up button and verify that the %SpO
upper alarm limit setting minus one point.
9. Turn the N-550B off by pressing the Power On/Off button.
10. Turn the N-550B on by pressing the Power On/Off button.
11. Wait for POST to be completed. The %SpO
will be reset to the default values.
12. Press the Pulse Rate Alarm Limit button. Verify that the N-550B emits
a single beep, the Pulse Rate display indicates an alarm limit of "170"
and that the %SpO
2
Figure 6: Adjusting High Pulse Rate Alarm Limit
13. Press the Pulse Rate Alarm Limit Button. Within 3 seconds press and
hold the Adjust Down button. Verify that the Pulse Rate display
reduces to a minimum of one point above the pulse rate low limit alarm
setting.
display cannot be raised past the
2
2
display window shows "HI" for about 3 seconds.
Performance Verification
Alarm Limit
2
and pulse rate alarm limits
13
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