Yokogawa digitalYEWFLO (DY) - Manual (Page 99)

<11. MAINTENANCE>
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IM 01F06A00-01EN
11. MAINTENANCE
CAUTION
• Disassemble work should be done only for error occurrence.
• Maintenance work must be carried out by expert engineer or skilled personnel and not by operators.
• Before opening the cover, it is important to ensure that at least 10 minutes have passed since the power
was turned off. Furthermore, opening of the cover must also be carried out by expert engineer or skilled
personnel.
CAUTION
• It is prohibited by law for the user to modify fl ameproof instruments. It is not permitted to add or remove
indicators. If modifi cation is required, contact YOKOGAWA.
• Explosion protected type must be, as a rule, removed to a non-hazardous area for maintenance and be
disassembled and reassembled to the original state.
• For TIIS, ATEX and SAA explosion proof, the display cover is locked by the Locking Screw. In case of
opening the display cover, use the hexagonal wrench attached.
• Be sure to lock the cover by the Locking Screw using the hexagonal wrench attached after installing the
cover.