▸ Regular maintenance, inspection and calibration
to assure the above conditions do not exist should be performed. Longer-range
preventive actions, such as preventing rouge formation, usually involve
conditions upstream of the OCM and are addressed in the relevant sections.
▸ OCMs should be flushed with clean water after use and
their measuring cell cleaned with a bottle brush or where manual/automatic
cleaning mechanisms are provided they should be operated prior to
shutting down the equipment.
Weekly documented maintenance
of OCMs has demonstrated that an OCM can successfully operate for
more than 20 years.