Respironics 920M Service Manual download pdf (Page 24)

4. Flashing Display

The numerical displays will flash once each second if the 920

determines that a battery low condition exists. Replace all six

batteries immediately.

NOTE:

Inaccurate SpO

and/or pulse rate

measurement may result if the 920 is operated

in a low battery condition.

5. Dash in the SpO

Display

If the 920 determines that a sensor fault exists (sensor disconnect,

sensor failure, or sensor dislodgment), a dash (-) appears in the

left-most digit of the SpO

display. The readings that are being

displayed will remain unchanged while the sensor fault exists. If the

sensor fault is not corrected, dashes will be displayed 10 seconds

after the minus sign appears.

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Respironics 920M Service Manual Page 24