RGB Omicrom FT, Service Manual

Page: 25 / 116

OMICROM FT
SERVICE MANUAL
21 September 1998
2.18
2.4.3. SpO
2
messages.
During the normal operation of Omicrom FT monitor, it can show several alarm
messages regarding the SpO
2
signal (P000PLAC19 board). These messages are:
1) INTERNAL FAILURE
The self calibration has failed or it is not possible to
communicate with the SpO
2
board.
2) CABLE OFF The SpO
2
cable is disconnected from the SpO
2
board. The same message is used if the sensor is
disconnected.
3) SENSOR OFF PATIENT The SpO
2
sensor is not placed on the patient finger.
This failure is detected with the finger type sensor,
but with other type of sensors this message could
not be shown.
4) INSUFFICIENT LIGHT The level of light received by the photodiode is too
low. This failure can be caused by a bad sensor
position or a failure of the excitation circuit of the
LED diodes in the sensor
5) INTERFERENCES
The sensor is receiving a high level of ambient light
and the measurement is not reliable. Check the
placing of the sensor.
6) WEAK SIGNAL The pulsatile signal received by the sensor is too
low, so it is not possible to compute a reliable
saturation measurement.
7) PATIENT MOVEMENT The patient is moving, so the pulse detection
system is failing to detect the real pulses of the
patient and it is not possible to compute a reliable
saturation measurement.
8) SATURAT. RANGE
ERROR The computed saturation value is out of the range of
measurement ( the measured value is below 40% of
O
2
saturation).