Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 14)

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IM 11B08A01-01E
 Precautions for protection system (The analyzer with FM-Y does not have the
protection system.)
WARNING
When the cover of the protection system is uninstalled, use a gas detector to check that the
concentration of explosive gases in the ambient atmosphere is less than the allowable limit.
The protection system is a fl ameproof enclosure.
When handling the screws on the cover of the protection system, note the following to avoid
damaging the screws since they cannot be repaired.
• Use a hex wrench (option) to tighten/loosen the hexagon socketset screw.
• The cover should be placed in a clean plastic bag or on a clean space to prevent it from
contamination.
Before installing the cover, confi rm that the body and screws are not contaminated. If they
are, make sure to clean them.
• Since the screws are coated with MOLYKOTE, do not lubricate them.
• When installing the cover, tighten the screws by hand; never use tools.
Cover Body
Threads
Hex. key wrench
(Accessory kit)
Hex.socket set screw
Turn in this direction
to replace
Turn in this direction
to remove
Figure4 Opening/closing the cover of the protection system
 Precautions for hydrogen gas
When using hydrogen gas as the carrier gas, the FID or FPD combustion gas, install the analyzer
in a location equipped with a ventilator or where there is suffi cient ventilation to ensure safety.
Check for leaks regularly to make sure there are no gas leaks from the pipe joints.
Provide a regulator separately and supply hydrogen gas to this analyzer at 500 kPa.
 Protection gas (Air) pipe
This is the pipe for supplying air to the analyzer for purging pressurized enclosures.
An air pressure of 350 to 900 kPa is required. Use general instrument air as the source and
connect the piping to the analyzer PURGE AIR port. A pressure regulator should be installed in-
between.
2nd Edition : May 11, 2012-00