Omron NT11 - 01-2004, Руководство пользователя

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Inspection and Cleaning
Section 6-3
6-3 Inspection and Cleaning
Clean and inspect the NT11 regularly to ensure that it is always used in its
optimum condition.
Cleaning Method 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 is par-
ticularly heavy, attempting to remove it by wiping with a dry cloth may
damage the front sheet of the Unit. In this case, wipe with a damp cloth.
• If the soiling cannot be removed with a dry cloth, wet the cloth with diluted
neutral 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.
Note Never use volatile solvents such as benzene or thinners, or chemical dusters.
Otherwise the product may malfunction.
Inspection Method In normal environments, inspect the NT11 at intervals of between 6 months
and a year. In environments that are extremely hot and humid, or very dusty
environments, shorten the inspection interval.
Items Required for the Inspection
Prepare the following items before starting the inspection.
• Screwdrivers (Phillips, 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)
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 NT11.
Data Over Flow Error Communication command from the
host is too long. (With memory link) Set flow control method in the host.
Increase transmission interval.
Command transmission to the host is
not possible. Check the communication cable.
Check the control method at the PT and the host.
Increase the baud rate if it is too slow.
Error Details Displayed Probable Cause Remedy
Point Inspected Inspection Details Criterion Inspection Instrument
Power supply voltage Fluctuation in power supply
terminal voltage Permissible voltage fluctuation
range
(24 VDC
±
15%)
Tester