Omron NT620S Operation Manual page 288

Inspection and Cleaning
7-4 Inspection and Cleaning
Cleaning Method
Note
Inspection Method
278
Clean and inspect the NT620S/620C 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.
S In daily cleaning, wipe the display with a soft dry cloth.
S 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.
S 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 NT620S/620C display
and body.
In normal environments, inspect the NT620S/620C 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.
S Items required for the inspection
Prepare the following items before starting the inspection.
- The tools supplied with the NT620S/620C
- 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)
Section 7-4