Advanced Instruments, Inc.
6. Maintenance
Generally, cleaning the electrical contacts or replacing filter elements is the extent of the maintenance
requirements of this transmitter.
Sensor Replacement
Periodically, the oxygen sensor will require replacement. The operating life is determined by a number of
factors that are influenced by the user and therefore difficult to predict. The Features & Specifications
define the normal operating conditions and expected life of the standard sensor utilized by the GPR-
2500A transmitter. Expected sensor life is inversely proportional to changes in oxygen concentration,
pressure and temperature. To replace sensor, follow the procedure outlined in the section “Operation”
Serviceability: Except for replacing the oxygen sensor, there are no parts inside the transmitter for the
operator to service. Only trained personnel with the authorization of their supervisor should conduct
maintenance.
Caution: DO NOT open the oxygen sensor. The sensor contains a corrosive liquid electrolyte that could
be harmful if touched or ingested, refer to the Material Safety Data Sheet contained in the Owner’s
Manual. Avoid contact with any liquid or crystal type powder in or around the sensor or sensor housing,
as either could be a form of electrolyte. Leaking sensors should be disposed of in accordance with local
regulations.
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