<10. EXPLOSION-PROTECTED TYPE INSTRUMENTS>
10-28
IM 01R01B02-00E-E 12th edition October 01, 2014 -00
All Rights Reserved. Copyright © 2003, Rota Yokogawa
10.14.3 Operation
If the cover of the indicator unit has to be opened, following instructions must be followed.
1. Switch off the power supply.
2. Wait 15 minutes after power is turned off before opening the covers.
3. The cover is xed 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 modications of specications or physical conguration, such as
adding or changing the conguration of external wiring ports.
The instrument modication or parts replacement by other than authorized representatives of YOKOGAWA
is prohibited and will void the certication.
If the window of the cover is damaged the RAMC must be set out of operation.
10.15 Flame proof EAC (Russia, Belarus, Kazakhstan) cer-
tied RAMC (/GF1)
10.15.1 Technical data
Certicate :
RU С-DЕ.ГБО8.В.00317
Explosion proof:
1Ex d IIC T1...T6
Housing :
Painted aluminium casting type 91
Output signal (with electronic transmitter -E or -H) :
4–20 mA (2- wire unit, 3- wire unit) ; 0-20 mA (3- wire unit)
Power supply (with electronic transmitter -E or -H) :
2- or 3- wire unit
Limit switches :
Options /K1 to /K10 possible
Ambient temperature :
-20 °C to 60 °C
Minimum process temperature :
-20°C
Threads for cable glands :
- M16x1.5 (standard)
- ½” NPT (option /A5)
Temperature classication for gas application :
see chapter 10.10
10.15.2 Installation
see 10.10.2
10.15.3 Operation
see 10.10.3
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