B&C Electronics PH 7685/E – Rev. B
- 44 -
8 PREVENTIVE MAINTENANCE
Controller
Quality components are used to give the controller a high reliability.
The frequency of such maintenance depends of each particular application.
As in any electronic equipment, the mechanical components, such as relays and connectors, are
the most subject to damage.
- check for damage of the electrolytic capacitors if the meter is exposed to temperatures above
80 degree C.
- check for damage in all the electronic components if the meter is subjected to excessive
voltage
- check for damage of the electronic and mechanical components if the meter is dropped
- repeat periodically the pre-operation check
- check that all the connections are free from moisture and contamination
Disconnect the power supply to the monitor before performing the following procedures:
Use moisture free air and blow out the interior of the case and terminal board connections as
necessary.
Inspect the printed circuit boards for dirt and corrosion;
clean as necessary and blow dry.
Tighten all the terminal-board connections and mounting hardware
Replace the front panel circuit board or the base circuit board
Sensor
The state of the electrode's surface is critical for the normal operation of the system and should be
inspected more frequently when using alkaline liquids, oil and grease containing water, and bio-
applications.
Suggested methods for cleaning the electrode include chemical cleaning (except hydrofluoric
acid) and detergent washing.
To Next Page
