Omron K3HB, Technical Communications User'S Manual

Page: 114 / 147

9-3
Maintenance
Section 7-2
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7-2 Maintenance
This section describes the routine cleaning and inspection recommended as
regular maintenance. Handling methods when replacing Digital Indicators are
also explained here.
7-2-1 Cleaning
Clean the Digital Indicators regularly as described below in order to keep the
Network in its optimal operating condition.
• Wipe the Digital Indicator with a dry, soft cloth for regular cleaning.
• When dust or dirt cannot be removed with a dry cloth, dampen the cloth
with a neutral cleanser (2%), wring out the cloth, and wipe the Digital Indi-
cator.
• Smudges may remain on the Digital Indicator from gum, vinyl, or tape that
was left on for a long time. Remove these smudges when cleaning.
Note Never use volatile solvents, such as paint thinner or benzene, or chemical
wipes to clean the Digital Indicator. These substances may damage the sur-
face of the Digital Indicator.
7-2-2 Inspection
Inspect the system periodically to keep it in its optimal operating condition.
In general, inspect the system once every 6 to 12 months, but inspect more
frequently if the system is used in high-temperature, humid, or dusty condi-
tions.
Inspection Equipment
Prepare the following equipment before inspecting the system.
Equipment Required for
Regular Inspection A flat-blade and a Phillips screwdriver, a screwdriver for connecting communi-
cations connectors, a tester (or a digital voltmeter), industrial alcohol, and a
clean cloth are required for routine inspection.
Other Equipment that May
Be Required A synchroscope, oscilloscope, thermometer, or hygrometer may be required.
Inspection Procedure
Check the items in the following table and correct any condition that is below
standard by adjusting the Digital Indicator or improving the environmental
conditions.
Inspection item Details Standard Equipment
Environmental conditions Are ambient and cabinet temperatures
correct?
−
10 to +55
°
C Thermometer
Are ambient and cabinet humidity cor-
rect? 25% to 85% Hygrometer
Has dust or dirt accumulated? No dust or dirt Visual inspection
Installation conditions Are the connectors of the communica-
tions cables fully inserted? No looseness Phillips screwdriver
Are the external wiring screws tight? No looseness Phillips screwdriver
Are the connecting cables undamaged? No external damage Visual inspection