Instruction manual

NGA 2000 MLT Hardware
SAFETY INSTRUCTIONS
S - 6
Emerson Process Management GmbH & Co. OHG
Instruction Manual
90002929
07/2006
Gases and Gas Conditioning (Sample Handling)
GASES AND GAS CONDITIONING (SAMPLE HANDLING)
Supplying explosive gases is not permitted !
EXPLOSION HAZARD !
Supplying flammable gases of concentrations above 25 % of lower
explosion limit (LEL) we recommend to utilize one or more of the following
measures:
• Purging the housing with inert gas
• Internal tubing with stainless steel
• Flame arrestors at gas input and output fittings
• Intrinsically safe paramagnetical or thermal conductivity sensors
• Purge gas must be conditioned:
Take care for purge gas temperature: Purge gas should have the same temperature as
ambient temperature of the analyzer but NOT below 20 °C and above 35 °C! Otherwise
it must be cooled or warmed up before let in into the instrument!
Purge gas should be instrumental / synthetic air (free of oil, no corrosive, toxic or flammable
gas componets) or nitrogen depending on application.
Take care of the safety instructions applicable for the gases (sample
gases and test gases) and for the gas bottles containing these gases!
Before opening gas paths they must be purged with ambient air or
neutral gas (N
2
) to avoid hazards caused by toxic, flammable,
explosive or harmful to health sample gas components!
Flammable gases must not supplied without additional protective
measures!
It is prohibited to supply explosive gases!