Instruction manual

NGA 2000 MLT Hardware
TECHNICAL DESCRIPTION
1 - 1
Emerson Process Management GmbH & Co. OHG
Instruction Manual
90002929
01/2007
1. Technical Description
1.1 Standard General Purpose Applications
The different analyzers and analyzer modules are assembled in principle identically.
All components of analyzers or analyzer modules are incorporated into a housing for platform
mounting (MLT 1), a 1/2 19" housing (MLT 1) or a 1/1 19" housing (MLT 3/4).
MLT 1 analyzer module housings for platform mounting are available to built-in into a NGA platform
only (M) or for external installation and platform mounting (A) connected via NGA network.
The 1/2 19" and 1/1 19" housings are available as rack mounting (R) or as table-top (T) versions.
For analyzer modules there is mounted a blind plate instead of an operation front panel.
An IP 65 protected field housing (MLT 2) for outdoor installation is available, too.This enclosure is
intended to be wall mounted.
1.2 Installation in Hazardous Areas
Note!
This manual does not deal with special conditions for analyzers in hazardous areas, related to
installation, operation, maintenance etc. For such applications refer to the separate instruc-
tion manuals, delivered together with the analyzers.
For installation in hazardous areas the MLT 2 analyzer or analyzer module 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. The
MLT 2-NF is type approved for non-flammable sample gas acc. to CSA-C/US for both Canada
and US.
The CAT 200 analyzer or analyzer module, designed to be installed in hazardous areas, too,
comprised of a 1/2-19" analyzer analyzer installed into a flameproof enclosure. This model is CSA-
C/US and ATEX approved for installation in North-American and European hazardous areas.
STANDARD GENERAL PURPOSE APPLICATIONS/INSTALLATION IN HAZARDOUS AREAS