Operational Performance; Table 8: Operational Performance Problems - Nellcor OXIMAX N-595 Service Manual

Operational
Performance
N-595
Table 8 on page 47 lists symptoms of problems relating to operational
performance (no error codes displayed) and recommended actions. If the
action requires replacement of a PCB or module, refer to Disassembly Guide
on page 51.

Table 8: Operational Performance Problems

Symptom
The Pulse Amplitude
indicator seems to
indicate a pulse, but the
digital displays show
zeroes.
SpO or Pulse values
2
change rapidly; Pulse
Amplitude indicator is
erratic.
Recommended Action
• The sensor may be damaged; replace it.
• If the condition still persists, replace the User
Interface PCB. See User Interface PCB Removal/
Replacement on page 64.
• The sensor may be damp or may have been reused
too many times. Replace it.
• An electrosurgical unit (ESU) may be interfering
with performance:
- Move the N-595 and its cables and sensors as far
from the ESU as possible.
- Plug the N-595 power supply and the ESU into
different AC circuits.
- Move the ESU ground pad as close to the
surgical site as possible and as far away from
the sensor as possible.
• Verify the performance with the procedures
detailed in Performance Verification on page 9.
• If the condition still persists, replace the User
Interface PCB. See User Interface PCB Removal/
Replacement on page 64.
Troubleshooting
47