O & M Manual
Revision C (7/09)
- 58 -
Part 8 – System Maintenance
8.1
General
The Q45D/60 Dissolved Oxygen System will generally provide unattended
operation over long periods of time. With proper care, the system should
continue to provide measurements indefinitely. For reliable operation,
maintenance on the system must be done on a regular schedule. Keep in mind
that preventive maintenance on a regular schedule is much less troublesome
than emergency maintenance that always seems to come at the wrong time.
8.2
Analyzer Maintenance
No unusual maintenance of the analyzer is required if installed according to the
guidelines of this operating manual. If the enclosure door is frequently opened
and closed, it would be wise to periodically inspect the enclosure sealing gasket
for breaks or tears.
8.3
Sensor Maintenance
Very little sensor maintenance is required for an optical D.O. system. The
primary requirement is simply to keep the sensing area clean. The photo in
section 4 of this manual shows the sensitive area. Inspect the sensor every few
weeks visually just to verify that this area is clean. Wipe with a soft cloth if
necessary.
The life of the optical element is likely to be greater than 2 years but less than 5
years. When the optical sensing element is expended, a new one can easily be
installed.
