Instruction manual

P - 1
NGA 2000 MLT Hardware
PREFACE
Emerson Process Management GmbH & Co. OHG
Instruction Manual
90002929
12/2006
Preface
a) Analyzer versions - Standard General Purpose Applications
The MLT series of NGA 2000 analyzers offers multi-component, multi-method analysis. Different
measurement methods can be combined in one analyzer.
MLT 1, MLT 2 and MLT 4 (MLT 5) are designed to measure up to 5 gas components while MLT 1
ULCO, MLT 3 and CAT 200 allow up to 4 gas components (including photometer and non-
photometer channels).
For MLT (MLT 1, 2 & CAT 200) with Foundation Fieldbus (FF) a special FF instruction manual
is provided.
NGA 2000 MLT 1 ULCO gas analyzer is specially designed to measure ultra low carbon monoxide.
The analyzer is equipped with a 2
nd
optical bench including a multi detector assembly (MDA block)
for cross interference compensation in 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 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.
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.
All MLT 2 components are incorporated into a wall-mountable housing with ingress protection code
IP 65 (designed to meet NEMA 4/4X) according to EN 60529. This housing is equipped with
an impact tested front panel according to EN 50014 operated by a magnetically operated touch
panel. The MLT 2 can be purged to remove corrosive or toxic gases with synthetic air or
instrumental air (dry, free of oil, hydrocarbons and corrosive components; 20 to 35 °C purge gas
temperature). If sample gas contains flammable gas components above the lower explosion
limit, the required explosion protection measures (purge/pressurization system) must be
approved by an authorized person (ATEX/CSA-C/US purge system) .
MLT 2 is available with a dual compartment enclosure, too, whereat electronics and photometer/
sensors are installed in two separate housings.
Special high temperature variations of MLT 2 or 3 for physics temperatures up to 120 °C are
optionally available (standard thermostat control: 55 °C; 65 °C as option).
Special versions of MLT 3 are available with suppressed ranges for gas purity measurements
and a corresponding additional manual too (special sample handlingrequirements).