<Safety Precautions and Protection of Environment>
13
IM 12Y18A00-01EN
1st Edition : Jul. 16, 2019-00
3. Maintenance
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Periodic maintenance
If the window becomes soiled, clean it using a soft damp cloth or soft tissue.
To deal with more stubborn stains, a neutral detergent may be used.
CAUTION
Never use harsh chemicals or solvents. In the event that the window does become heavily
stained or scratched, refer to the parts list for replacement part numbers.
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Battery
WE410, WE420, WE430 and WE440 contain a lithium cell (battery) to support the clock function
when the power is switched off. The cell has an expected working life of 10 years. Should this cell
need to be replaced, contact your nearest Yokogawa service center.
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Fuse
There is a circuit board mounted fuse protecting the instrument. If a fuse blows soon after the
change, contact your nearest Yokogawa service center.
