Nellcor Oximax NPB-40 Operator's Manual page 111

1. There is no response to the Power button.
Ensure that the Power button is fully depressed.
•
• The batteries may be missing, discharged, or
oriented incorrectly. Install new batteries. See
Battery Installation on page 33.
2. One or more display segments or indicators do
not light during the power-on self-test.
• Do not use the NPB-40; contact qualified service
personnel or your local Nellcor representative.
3. The Pulse Search indicator is displayed for more
than 10 seconds.
• Check the sensor directions for use to determine if
an appropriate sensor is being used and if it is
applied properly. Check sensor and extension cable
connections. Test the sensor on another subject.
Try another sensor or extension cable.
• Perfusion may be too low for the NPB-40 to track
the pulse. Check the patient. Test the NPB-40 on
yourself. Change the sensor site. Try another
sensor.
• Excessive patient motion may be preventing the
NPB-40 from tracking the pulse. Keep the patient
still, if possible. Verify that the sensor is securely
applied, and replace it if necessary. Change the
sensor site.
NPB-40
Troubleshooting
103