<Start-up and Safety Precautions>
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IM 11M12G01-01Z1
1st Edition : Mar. 08, 2021-00
1.4. Maintenance
n
Periodic maintenance
The ZR802G requires very little periodic maintenance, except to make sure the front window
is kept clean in order to permit a clear view of the display and allow proper operation of the
touchscreen. 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.
When you must open the front cover and/or glands, make sure that the seals are clean and
correctly fitted when the unit is re-assembled in order to maintain the housing’s weatherproof
integrity against water and water vapor.
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.
Battery
The ZR802G contains 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.
Note: Review how to dispose the battery (page 1-3)
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.