Hach ANATEL PAT700, Operator'S Manual

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PAT700 Total Organic Carbon Analyzer – Bottle Mode Page 77
Anatel
Operator Manual
Grab sample button takes you to the grab sample load bottles dialog box. See Grab sample,
page 93 .
Excursion mode button takes you to the excursion mode dialog box. See Excursion mode,
page 96 .
Unload bottles button takes you to the unload/replace bottles dialog box. See Figure 6-11,
page 84 .
6.4 Run standards
The run standards dialog box allows you to select a standards test to run. See Figure 6-2 .
Figure 6-2 Run standards dialog box
TOC calibration button takes you to the TOC calibration setup dialog box.
Conductivity calibration button takes you to the conductivity calibration load bottles dialog
box. See Conductivity calibration, page 85 .
TOC validation button takes you to the TOC validation setup dialog box. See TOC
validation, page 89 .
System suitability button takes you to the system suitability load bottles dialog box. See
System suitability test, page 91 .
Return icon returns you to the bottle mode dialog box. See Bottle mode dialog box, page 76 .
6.5 TOC calibration
TOC calibration ensures the accuracy of the TOC values obtained by the analyzer. TOC
values are determined by measuring the change in conductivity of a high-purity water sample
as its organic compounds oxidize to carbon dioxide inside the analysis cell. The procedure
subtracts the average of a series of background TOC measurements from the average of a
series of user-selected standard measurements (in the form of sucrose). Linear regression is
performed on the data, and the correlation coefficient (R
2
) and percent slope change (% sc)
are calculated and reported.