OXITEST PLUS 7 OPERATING MANUAL
5.2
Diagnosing Sensor Faults
Use the following table when troubleshooting pulse oximeter sensor and cable problems, with the
help of the
Oxitest Plus 7
’s STATUS display.
STATUS
DISPLAY
PROBABLE FAULT(S)
NO RED
- RED LED is defective. This is normally evident if RED LED is not
visible when viewing sensor
- sensor cable(s) have an open or intermittent wire contact, or cable
connector(s) are defective
- RED LED drive signal from oximeter is missing
NO IR
- INFRARED LED is defective. This is
NOT
evident when viewing
sensor
- sensor cable(s) have an open or intermittent wire contact, or cable
connector(s) are defective
- INFRARED LED drive signal from oximeter is missing
NO
SIGNAL
- both RED and INFRARED LEDs are faulty
- sensor cable(s) have an open or intermittent wire contact, or cable
connector(s) are defective
- both RED and INFRARED LED drive signals from oximeter are
missing
RED+IR
OK
Oximeter displays “Low Light”, or “Insufficient Light”, and may alarm.
- Photo detector in sensor is faulty
- sensor cable(s) have an open or intermittent wire contact, or cable
connector(s) are defective
- Photo detector circuitry in oximeter is defective or out of calibration
Intermittent contacts in the cable or connectors can be confirmed by twisting the cable (hold the
sensor on the test probe if twisting near the sensor). The LCD STATUS display will change from
the error code listed above to “TESTING...”. When “TESTING...”, the
Oxitest Plus 7
has
recognized a new signal and is checking to confirm that both RED and IR signals are present and
correctly timed for the oximeter under test.
For testing of the probe sensor cable, see Datrend’s companion test instrument: Sensitest.
Test Useage/Chapter 5
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