Teledyne MX300-I Manuel D’Utilisation

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The Teledyne Model MX300-I Portable Oxygen Monitor is 

designed to be robust yet compact in size. In order to achieve maximum 
reliability in a microprocessor-based instrument, a single PC board is 
used which relies exclusively on surface mount technology. Without 
access to specialized probes and test equipment, troubleshooting and 
repair of circuit board components are not feasible. A factory 
replacement of the entire PC board is more cost effective than a field 
repair of an individual component  

With the exception of replacing the sensor or batteries there are no 

user-serviceable components inside the unit. There are no 
potentiometers or other adjustments to be made within this instrument. If 
a problem arises with either of these models that cannot be corrected by 
recalibration, changing the batteries or replacing the sensor as described 
in the users manuals, contact your locale Representative or Teledyne for 
assistance. When returning the unit to the factory for repair or 
replacement. See Section 3.11 for instructions on obtaining a Return 
Merchandise Authorization (RMA) number before sending a unit back 
to Teledyne for repair.  

The MX300-I requires very little maintenance, other than 

calibration, checking and changing the batteries and sensor, and cleaning 
the plastic housing. Occasional cleaning of the plastic surface can be 
done with isopropyl alcohol. Should any part of the instrument 
malfunction or fail to perform, the unit should be removed from service. 
There are no user-serviceable components within the instrument.  

DO: Test batteries regularly. (replace immediately when all 5 bars 

are missing).  

DO: Always use alkaline batteries.