Glossary - ABB PGC2000 Operation And Service Manual

A/D converter
analyzer
ASCII
Auto Zero
baseline
benchmark
calibration run
CE Mark
CENELEC
Chroma I/O
components
concentration
CPU
cursor keys
DCS
Data Package
default values
detector
background
noise
2000-OSM, F1

GLOSSARY

device that converts an analog signal to a digital value
process gas chromatograph
American Standard Code for Information Interchange; standardized computer
coding for printed characters
procedure bringing the detector signal as close to electrical zero as possible;
brings the signal into the most sensitive area of the A/D
reference point from which peak height or peak area is measured on a
chromatogram; detector signal level at which no components are detected
sample known to be a definite concentration; used to compare an
analyzer's present performance to its past performance
analysis that involves injecting a standard sample consisting of specific
components whose concentrations and elution sequences are known
certification process and marking which denote that analyzer complies
with applicable new approach directives within the European Union
Comite' Europeen de Normalisation Electrotechnique; the European electronics
organization that determines standards and testing to ensure safe operation of
electrical instrumentation in hazardous areas
Chromatographic Input/Output PCB; provides the interface between the analog
domain of the gas chromatographic analyzer and the digital domain of the
controller
peaks, parameters or ratios that are being measured or calculated from a
chromatographic analysis
the amount of a specific substance within a sample
Central Processing Unit; controls the analyzer and collects and manipulates the
data
front panel control keys marked with directional arrows
Distributed Control System
application-specific engineering information (such as component tables, function
tables, chromatograms, and temperature, pressure and flow settings) shipped
with each analyzer
assigned parameters the controller will assume unless the operator redefines the
values
random electronic signals picked up by a sensing device in the absence
of valid measurable input (see "noise")
G-1