Inspection And Cleaning - Omron NT30 Operation Manual

Inspection and Cleaning

6-4

Inspection and Cleaning

Cleaning Method
Correct use
Inspection Method
Point Inspected
Power supply voltage
Ambient environmental
conditions
Clean and inspect the NT30/30C regularly to ensure that it is always used in its
optimum condition.
If the display is dirty the screen is difficult to see. Clean the screen from time to
time as follows.
• In daily cleaning, wipe the display with a soft dry cloth.
• If the soiling cannot be removed with a dry cloth, wet the cloth with diluted neu-
tral detergent (2%), wring it out well and wipe the display with it.
• If rubber or vinyl products, tape, etc. are left stuck to the display for long periods
they will cause staining. If such items are stuck to the display, remove them
during cleaning.
Never use volatile solvents such as benzene or thinners, or chemical dusters.
These could cause degeneration of the coatings of the NT30/30C display and
body.
In normal environments, inspect the NT30/30C at intervals of between 6 months
and a year. In environments that are extremely hot and humid, or very dusty envi-
ronments, shorten the inspection interval.
S Items Required for Inspection
Prepare the following items before starting the inspection.
• The tools supplied with the NT30/30C
• Screwdrivers (Philips, flat-head)
• Tester (or digital voltmeter)
• Industrial alcohol
• 100% cotton cloth
• Hygrometer (required in some cases)
• Thermometer (required in some cases)
• Synchroscope (required in some cases)
• Pen-writing oscilloscope (required in some cases)
S Points Inspected
Inspect the following points to determine if there is any divergence from the
stated criteria. If there is, either improve the surrounding environment so that
the values fall within the stated range, or adjust the NT30/30C.
Inspection Details
Fluctuation in power supply
terminal voltage
Ambient temperature
(temperature in the operation
panel)
Ambient humidity
(humidity in the operation
panel)
Presence/absence of dust
Criterion
Permissible voltage fluctuation
range
(24 VDC –15% +10%)
0 to 50_C
35% to 85%
Dust must not be settled
Section 6-4
Inspection Instrument
Tester
Thermometer
Hygrometer
Visual inspection
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