Tokyo Keiki KRG-10, Руководство пользователя

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8-2
8.4 Lifetime of components
The equipment has components with operational life expectancies. Periodic inspection of these
components is recommended. Please contact the nearest distributors in your area of the manufacturer
when any component replacement is required.
(1) LCD
The LCD, which displays measurement value or other information, has an operational lifetime of
approximately 5 year at room temperature. The contrast of the LCD may darken when this lifetime is
exceeded, but the operational and measurement functions of the transmitter are not affected.
Generally LCD lifetime may be shortened if it is exposed to direct sunlight or high temperature.
(2) Sealing parts
The lifetime of the sealing parts used in this equipment may be varied by site conditions. We
recommend periodical maintenance and check by authorized service engineers.
.
(3) Built-in arrester
Arrester is built into the terminal module to suppress indirect lightning surge due to lightning strikes
and protect the internal electronic circuits. Direct lightning strikes and surge that exceed the rating may
damage or degrade the arrestor. In addition to lightning damage, the arrester may also be degraded in
an environment that superposes the high-voltage surge generated from large power equipment onto
the power supply line.
Destruction can be checked on the exterior, it is difficult to determine the deterioration in appearance.
Periodical replacement or inspection by qualified service engineer is recommended.