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Portable Oxygen Monitor Service Manual
Teledyne Analytical Instruments 33
Service Manual
3.1 General Service Information
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.
3.2 Overall Maintenance
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.
3.3 Battery Maintenance
DO: Test batteries regularly. (replace immediately when all 5 bars
are missing).
DO: Always use alkaline batteries.