Instruction manual

Instruction Manual
760006-A
September 2001
P-6 Preface Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 Platform
Info
Refers to the help screens in the menu system.
Inrush Current Limiting
It is sometimes necessary to limit the current drawn by a piece of electronics when it is first switched on.
Special devices are available to do this. The NGA 2000 multi-module power supply uses them.
IR
Infra-red, also short for NDIR or Non-dispersive Infra-red Analyzer. Uses the absorption of infra-red energy
by certain gases as a means of measuring the concentration.
Linearization
The application of a mathematical formula to the Analyzer's signal with the intention of compensating for
the Analyzer's inherent non-linear response. Normally a fourth order polynomial is used.
LON
The LON is the Local Operating Network which is used to provide a communications link between the I/O
Module(s), Analyzer module(s) and the Controller Board in the Platform.
Main Menu
The top menu in the NGA 2000 menu system. The "HOME" key in all other menus returns you to this.
Menu
A screen full of information. Menus contain any or all of text, variables, function controls, or jumps to other
menus.
NDIR
Infra-red, also short for NDIR or Non-dispersive Infra-red Analyzer. Uses the absorption of infra-red energy
by certain gases as a means of measuring the concentration.
NGA 2000
Next Generation Analyzer, a term describing Rosemount Analytical's digital Analyzer system.
Paramagnetism
The quality of certain materials, particularly oxygen, of being attracted to a magnetic field, like a very weak
form of iron. Most gases are diamagnetic, meaning that they are very weakly repelled by a magnetic field.
Parms
Parameters, information that either tells you how the Analyzer is operating, or how it has been configured.
Physics
Refers to the physical measurement components within the Analyzer. Also the study of the natural world.
Platform
Any combination of the NGA 2000 case, the display and computer board, power supply, and I/O modules.
In general, it could be considered to be anything in the NGA 2000 system other than the Analyzer modules.
Platform Module
A module that provides operator command and control via a local network to one or more Analyzer mod-
ules connected to the NGA 2000 System.
PMD
Paramagnetic Detector, the name used for the NGA 2000 paramagnetic oxygen Analyzer module.