4-15 2000-OSM, F1
between the various components is established (at installation), only the K-factor is changed
during calibration.
Preparing a Method Table
This subsection explains how to prepare a method table by constructing a sample method table.
Figure 4-12 shows a chromatogram of the analysis to be controlled. This analysis is 90 seconds long
and has three components to measure: A, B, and C. These components elute at the following times
(after the start of the analysis): component A, 30 seconds; component B, 50 seconds; and
component C, 70 seconds.
0
90
TIME (in seconds)
A
B
C
Figure 4-12. CHROMATOGRAM OF ANALYSIS
In order to construct a method table for this analysis, you need to know when to turn valves on and
off, how the components are defined, and how to measure the components. For this analysis we
shall use slope detection, which is described in detail in "PEAK DETECTION." Figure 4-13 illustrates
the data needed to construct a method table for this analysis.
TIME-RELATED DATA OTHER DATA
Time Function Value Method Table No.: 1
Analysis Cycle Time: 90 sec
0001 Valve On One Calibration type: external std
0005 Valve Off One Analysis Normalization: no
0006 Stream Step N/A Primary Cal Stream: 10
0007 Auto Zero N/A Secondary Cal Stream: not used
0012 Slope Detect On Now Benchmark Stream: not used
0020 Valve On Two Multiplier Exponent: 0
0021 Valve Off Two K Factor: 1
0030 Component One Component Units: PPM
0040 Valve On Three Key Component: #2
0041 Valve Off Three Retention Time Deviation: ±5 sec
0050 Component Two Response Factor: 1
0060 Valve On Two required Calibration Concentration: 100
0061 Valve Off Two for each Benchmark Concentration: 100
0070 Component Three component High Concentration Alarm: 100
0089 Slope Detect Off Now Low Concentration Alarm: 0
Calculate By: area
In Primary Cal Stream: yes
Figure 4-13. DATA FOR METHOD TABLE
To construct this method table perform the following steps:
1. On the Background screen, press the F1 (Exit to Commands) soft key.
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