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Portable Oxygen Monitor Operation
Teledyne Analytical Instruments 25
2.2 Use
2.2.1 Procedure
Note: Prior to use, always test the batteries and alarms (if
applicable). Also check calibration, the sensor for leaks
and damage, and the alarm settings.
The AX/MX300-I instruments can be used to measure a gas
mixture for oxygen in two basic modes:
• In the inhalation side of breathing circuit ahead of
antibacterial filters, humidifiers and medicating devices.
• In confined volumes such as incubators or tents.
When monitoring for oxygen in breathing circuits, the flow diverter
must be used. The diverter should be screwed onto the threaded front
end of the R17MED sensor. A tee adapter (plastic, P/N A268, or metal,
P/N A283) should be placed into the circuit, and the above sensor
assembly plugged into the tee adapter. See Figure 2-1.
CAUTION: CHECK THE BREATHING CIRCUIT FOR LEAKS. BE
CERTAIN THAT THE CIRCUIT DOWNSTREAM OF
THE SENSOR DOES NOT PRODUCE ANY
BACKPRESSURE OR RESTRICTION TO FLOW.
ERRORS IN READINGS WILL RESULT IF THIS IS
NOT FOLLOWED.
THE OXYGEN SENSOR IS A NON-STERILE DEVICE
AND SHOULD BE USED IN CONJUCTION WITH AN
ANTIBACTERIAL FILTER. ALWAYS INSTALL THE
SENSOR ON THE INSPIRED LINE AHEAD OF
FILTERS, HUMIDIFIERS AND MEDICATING DEVICES.
NEVER EXPOSE THE SENSOR TO PATIENT’S
EXHALED BREATH OR SECRETIONS UNLESS YOU
INTEND TO DISPOSE OF THE SENSOR AND FLOW
ADAPTER AFTER USE.
When monitoring for oxygen in confined volumes such as
incubators, hoods, etc., the flow diverter must be removed from the