Teledyne MX300 - Manual (Page 31)

Portable Oxygen Monitor Service Instructions
Teledyne Analytical Instruments 23
Service Instructions
3.1 General Service Information
Without access to special probes and test equipment, troubleshooting and repair
of the board or its components are not feasible. A factory replacement of the entire
PC board is recommended if necessary.
With the exception of replacing the sensor or batteries, there are no user-
serviceable components inside the unit. If a problem arises that cannot be corrected
by recalibration, changing the batteries or replacing the sensor as described in this
manual, the unit must be sent back to the factory for repair or replacement. Contact
your local Representative or 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 Monitor requires very little maintenance, other than calibra-
tion, checking the batteries and sensor. Occasional cleaning of the plastic surface
can be done with isopropyl alcohol. There are no user-serviceable components
within the Monitor.
3.3 Battery Maintenance
DO: Test batteries regularly. (Replace immediately when all battery
strength indicator bars are missing).
DO: Always use alkaline batteries.
DO: Recalibrate after replacing batteries.
The MX300 Monitor has a battery strength indicator that continuously dis-
plays the approximate amount of useful life remaining on the set of installed bat-
teries. Excessive alarm activation will drain the batteries faster. The minimum
detectable change in battery voltage corresponds to an increment of about 50
hours, meaning that the battery voltage reading may not change for several hours
at a time.
If the Monitor is not used for a period of 30 days or more, the batteries
should be removed from the Monitor.