Yokogawa GC1000 Mark II Process Gas Chromatograph - Manual (Page 11)

x
<Toc> <Ind> <Rev> <Introduction>
IM 11B03A03-01E 3rd Edition : Aug. 23. 2006-00
(9) Operation
WARNING
<CENELEC>
* Only trained persons may use this instrument in a hazardousl location.
* Do not open when energized.
<FM>
For type X purging:
* This equipment contains components that operate at high temperature. The equip-
ment shall be deenergized for 60 minutes to permit those components to cool before
the enclosure is opened unless the area is demonstrated to be nonhazardous at the
time.
* Enclosure shall not be opened unless the area is known to be nonhazardous, or
unless all devices within have been de-energized.
* Power shall not be restored after enclosure has been opened until enclosure has
been purged for 12 minutes. (When the internal pressure is restored, the system
automatically purges over the 12 minutes, then turns on the power again.)
For explosionproof enclosure:
* Seal all conduits within 18 inches
* Open circuit before removing cover.
For type Y purging:
* Enclosure shall not be opened unless the area is known to be non-hazardous, or
unless all devices within have been de-energized. Power shall not be restored after
enclosure has been opened until enclosure has been purged for 12 minutes at speci-
fied pressure indicated by the pressure gauge labeled “EL.BOX” in the pressure and
flow control section.
* Alarm shall be provided and connected to alarm contact output.
(a) The alarm shall generate a visual or audible signal that attracts attention
(b) The alarm shall be located at constantly attended location.
(c) Electrical alarms shall be approved for the location in which they are installed.