4-13
2000-OSM, F1
Communications PCB (Option)
The Communications PCB, in any open slot in the GCC Card Cage, provides a two-channel interface
between the GCC and the VistaNET. This PCB is not used when the analyzer has the optional
Ethernet PCB. See "VISTANET OPTION" for a detailed explanation of the VistaNET option.
VistaNET Interconnect PCB (Option)
The VistaNET Interconnect PCB, located on the side of the GCC Card Cage, provides low-speed
interface between the GCC and the VistaNET. It is used in low-speed systems in conjunction with the
Communications PCB.
Ethernet PCB (Option)
The Ethernet PCB, in any open slot in the GCC Card Cage, provides two-way communication with
the plant network and the VistaNET software application by way of Ethernet. The Ethernet PCB
connects to an Analytical Ethernet switch using standard Ethernet cabling.
Analog Output PCB (Option)
The Analog Output (Trend) PCB has two configurations: a voltage board providing up to 48 outputs
and a current board providing up to 16 outputs. Trend PCBs are in GCC Card Cage slots 6 and 7.
See "ANALOG OUTPUT OPTION" for a detailed explanation of the Analog Output option.
Digital Input/Output PCB (Option)
The Digital Input/Output PCB has two configurations: up to 48 outputs or up to 16 inputs and 32
outputs. Digital I/O PCBs are in GCC Card Cage slots 5 and 6. See "DIGITAL I/O OPTION" for a
detailed explanation of the Digital Input/Output option.
METHOD TABLES
A method table is the program used to control an analyzer during an analysis. It contains all the
instructions and data required to identify each component of the sample and produce a meaningful
analysis report. The analyzer can have a maximum of eight method tables, each supporting up to 62
components. In order for the analysis to be accurate, the analyzer must be calibrated first.
Calibrating the Method
Calibration provides a response factor which converts the individual component’s peak area or peak
height into an actual component concentration value. This response factor is generated by one of
three calibration methods performed prior to obtaining any valid analysis results. These calibration
methods are:
•
External Standard, in which the controller calibrates the analyzer against an external calibration
standard of precisely known component concentration
External Standard calibration requires you to provide the calibration concentration (CC) for each
component to be analyzed. Each component must be contained in one of the two calibration
streams so that the detector response may be determined for each component independent of all
other components. The system performs an analysis of the calibration stream, obtaining
corrected values for the peak area (A) and peak height (H) of each component contained in that
stream. The controller then calculates the response factor (RF) for each component as follows:
