Instruction manual

NGA 2000 MLT Hardware
TECHNICAL DESCRIPTION
1 - 17
Emerson Process Management GmbH & Co. OHG
Instruction Manual
90002929
07/2006
MLT2 (FIELD HOUSING)
1.5 MLT 2 (Field Housing)
With MLT 2 Emerson Process Management offers a gas analyzer designed for wall mounting and
outdoor installation due to it‘s stainless steel enclosure.
All MLT 2 components are incorporated into a wall-mountable housing with ingress protection code
IP 65 (approx. NEMA 4/4X) according to EN 60529.
The optional impact protected front panel enables installation at harsh locations (or even in
hazardous area when combined with a pressurization system for the enclosure).
Such analyzers are contactless operated using a special magnetic tool.
All interface signals (partial options) are accessible on internal screw terminal blocks. That applies
to mains power supply, too..
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 system) must be approved by an authorized person (purge
system) .
MLT 2 is available with a dual compartment enclosure, too, whereat electronics and photometer/
sensors are installed in two separate housings.
A special high temperature variation of MLT 2 for temperatures up to 120 °C is optionally available
(standard: 55 °C; 65 °C as option).
The analyzer is specified for an operating voltage of 230 V AC or 120 V AC resp., 47-63 Hz.
Built-in power supply (manual switch between 230/120 VAC) is either power supply of type SL5
or of type SL10
For installation in hazardous areas the MLT 2 is provided with an adapted pressurization system
(ATEX type approved for Zone 1 resp. Zone 2 in Europe) and an impact tested magnetically
operated front panel. Optionally intrinsically safe signal couplers are available, too.
A simplified z-purge system permits installation in North America Zone 2 environments.
This current instruction manual covers using the MLT 2 analyzer for general
purpose applications only!
Installation, startup and maintenance for operation in hazardous areas are de-
scribed in detail in a separate instruction manual, shipped together with each
such analyzer and are not subject of the current instruction manual!