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Instruction Manual
IM-105-4000, Original Issue
August 2005
7-3
OPM 4000
CONTROL UNIT
PREVENTIVE
MAINTENANCE
Preventive maintenance consists of cleaning the instrument regularly and
inspecting it occasionally for broken or damaged parts. Regular maintenance
will improve the reliability of your instrument and prevent break downs.
Cleaning - Accumulations of dirt and dust on components act as an insulating
blanket preventing efficient heat dissipation. Dust on circuit boards and wires
can cause arcing and short circuits resulting in damage to components or
even instrument failure. Clean your instrument with clean high-pressure air
before this happens.
The control unit chassis provides protection from dust and dirt and should be
in place during normal operation of the instrument.
Exterior - Dust the chassis with a soft cloth. Dust the front panel with a soft
paintbrush. Dirt clinging to the surface can be removed with a soft cloth
dampened with a mild detergent and water solution. Avoid using abrasive
cleaners, as they will scratch the housing and front panel.
Interior - Dust in the interior of the control unit should be removed before it
builds up enough to cause arcing and short circuits during periods of high
humidity. Dust is best removed from the interior by the type of canned air
used for computer cleaning. Dirt clinging to the surfaces can be removed with
a soft paintbrush.
Visual Inspection - Inspect the interior occasionally for broken connections,
improperly seated semiconductors, damaged or improperly installed circuit
boards, heat damaged components, etc. If heat damaged components are
found, care must be taken to find the cause of the excessive heat and
measures must be taken to prevent recurrence of the damage.
Semiconductor Checks - Periodic checks of the semiconductor devices in
this instrument are not recommended
. The best check of semiconductor
performance is actual operation of the instrument.
Weather cover/blower preventive maintenance.
Periodically - Check and inspect all hoses and wire connections inside the
weather covers.
Air Filter - Empty the collection container at the bottom of each air filter.
Remove the filter by turning the key to loosen the band holding it in place.
Pull the container down and remove the rubber insert to empty any heavy
particles. Before replacing, unscrew the wing nut holding the filter cartridge in
place. It should be exposed to view where you removed the container.
Remove and inspect, and clean or replace the filter cartridge as necessary.