Instruction manual

NGA 2000 MLT Hardware
TECHNICAL DESCRIPTION
1 - 11
Emerson Process Management GmbH & Co. OHG
Instruction Manual
90002929
01/2007
MLT1 ULCO
1.4.2 MLT 1 ULCO
NGA 2000 MLT 1 ULCO gas analyzer is specially designed to measure ultra low carbon
monoxide in a matrix with high water vapor and/or carbon dioxide contents. The analyzer is
equipped with a 2
nd
optical bench including a multi detector assembly (MDA block) for cross
interference compensation, especially being designed for automotive and flue gas
applications. Water vapor and carbon dioxide measurement is used for internal cross
interference compensation thus providing an ultra low CO and percentage CO
2
channel as
standard. This solution is designed for automotive (Internal Combustion Engine Emissions,
ICEE) and Continuous Emissions Monitoring Systems (CEMS). An additional CO
high
channel
is available as option on automotive applications. The water vapor channel is designed for
measuring crossinterferences only but coudl be used as a measuring channel too but without
offering the same accuracy as a "normal" measuring channel. This means that teh standard
specifications are not applicable for this special water vapor channel.
For gas purity measurement new quality standards require ultra low CO measurement but not
such high dynamic ranging and cross compensation.
Therefore the 2
nd
bench (MDA) is not used, but another channel, e.g. ultra low carbon dioxide
(ULCO
2
) can be implemented in MLT 1.