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Dissolved Oxygen Controller Maintenance
Teledyne Analytical Instruments 51
Maintenance
4.1 Routine Maintenance
Aside from normal cleaning routine maintenance is limited to
recalibration. For recalibration, see Section 3.4 Calibration. However, if
service of the internal components is required always turn off the power
to the instrument.
4.1.1 Cleaning
Although the LXT-220 NEMA 4X enclosure can withstand harsh
environments, it may become necessary to clean the front panel if it
becomes coated or dirty. Cleaning the front panel can be performed
with a detergent and water.
CAUTION: DO NOT USE ACETONE, ACIDS OR CAUSTIC
SOLUTIONS ON THE ENCLOSURE SURFACE.
Before cleaning, the integrity of the enclosure seals should be
inspected. Also check the conduit fittings and seals to make sure
moisture does not enter the enclosure while cleaning.
If the enclosure cover must be removed, it is wise to clean and
inspect the gasket seal. If the seal is damaged, replace the gasket.
Always keep the gasket lightly lubricated with a silicone grease.
4.1.2 Replacement of the Microprocessor:
For replacement of the microprocessor, contact the factory.
CAUTION: NEVER INTERCHANGE EPROMS FROM ONE
TRANSMITTER TO ANOTHER. DOING SO WILL
AFFECT TRANSMITTER PERFORMANCE.