Yokogawa RAMC - Manual (Page 120)

<10. EXPLOSION-PROTECTED TYPE INSTRUMENTS>
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IM 01R01B02-00E-E 10th edition January 01, 2013 -00 All Rights Reserved. Copyright © 2003, Rota Yokogawa
10.13.3 Operation
If the cover of the indicator unit has to be opened, following instructions must be followed.
CAUTION
1. Switch off the power supply.
2. Wait 15 minutes after power is turned off before opening the covers.
3. The cover is fixed with a special screw.
4. Be sure to lock the cover with special screw after tightening the cover.
5. Before starting the operation again, be sure to lock the cover with the locking screw.
6. Users are prohibited from making any modifications of specifications or physical configuration, such as
adding or changing the configuration of external wiring ports.
WARNING
The instrument modification or parts replacement by other than authorized representatives of YOKOGAWA
is prohibited and will void the certification.
WARNING
If the window of the cover is damaged the RAMC must be set out of operation.