Sentec SDM, Service Manual

Page: 60 / 93

4 Troubleshooting
HB-005615-j 54
Problem Possible Cause(s) Recommended action(s)
SpO2/ PR
Measurement is
influenced by high
ambient light levels
Shield SenTec TC Sensor from strong ambient
light (e.g. lamps).
Note: Refer to Status Message ‘High ambient
light’ (with Status Code ‘HA’) (see
Technical
Manual for the SDM).
Dysfunctional
hemoglobin
Physiological limitation of the method. In
patients with high carboxyhemoglobin levels
(e.g. smokers) functional saturation
measured with a pulse oximeter will
overestimate functional saturation determined
with a CO-oximeter.
Excessive use of
contact liquid
causing light
shunting
Remove the SenTec TC Sensor. Clean sensor
and measurement site with an alcohol pad.
Reapply the sensor using only one drop of
contact liquid.
Intravascular dyes
Limitation of the method. Dyes used as
tracer, contrast medium, etc. may absorb
light at the same wavelength as the one used
for pulse oximetry measurements.
4.2.3 Sensor specific troubleshooting
Table 8 Sensor specific troubleshooting
Problem Possible Cause(s) Recommended action(s)
P0300
Despite a
SenTec TC
Sensor is
connected to
the SDM the
message
‘Connect
sensor’
displays
Bad contact (cables
not properly
connected) Verify connections (disconnect and reconnect
all cables) and – if necessary – power cycle
the SDM.
SenTec TC Sensor
and / or ‘Digital
Sensor Adapter
Cable’ defective
To identify the defective part, exchange the
‘Digital Sensor Adapter Cable’ or the SenTec
TC Sensor and try again (if necessary
permute and try on a different SDM).
In case of damage of the SenTec TC Sensor
replace it by original replacement parts.
In case of damage of the ‘Digital Sensor
Adapter Cable’ replace it by original
replacement parts.
SDM defective If problem persists contact qualified service
personnel.
SDM defective Refer to
section 4.2.4 “SDM specific
troubleshooting” to further evaluate the
problem.