GE Sievers 900 Series, Руководство по эксплуатации и обслуживанию

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GE Analytical Instruments ©2009 156 of 236 DLM 90488-01 Rev. A
7. When prompted, remove the Reagent Water from the vial port IOS System, insert the 25
ppm TOC (as sucrose) standard, and press Next .
8. When prompted, remove the 25 ppm TOC (as sucrose) standard from the vial port IOS
System, insert the 50 ppm TOC (as sucrose) standard, and press Next .
9. When prompted, remove the 50 ppm TOC (as sucrose) standard from the vial port IOS
System, insert the 50 ppm IC (as Na
2
CO
3
) standard, and press Next
10. The Autoreagent verification summary screen is displayed (see Figure 29). This screen
presents data obtained during the analysis of the standards using the Autoreagents
function.
The Expected TOC Concentrations for the 25 ppm and 50 ppm TOC Standards are listed
first. These concentrations are the certified concentrations of the standards (i.e., 25.0 ppm
and 50.0 ppm, respectively).
The measured TOC concentrations are the average of the last three measurements made
on each standard, using the acid and oxidizer flow rates selected by the Autoreagent
function. The RSD of each measurement is listed, along with the % difference between the
measured and expected concentrations.
The % Difference is calculated as follows:
The summary screen then lists the preliminary measurements made at the IC and TC
channels for the 50 ppm IC Standard. The % Difference between the preliminary
measurements at the IC channel and the TC channel also is shown, and is calculated as
follows:
The Analyzer indicates if the Autoreagent calibration verification passed or failed based on
the following criteria:
• RSD of the last 3 valid TOC readings for the 25 and 50 ppm TOC standards is 5% or less
• % Diff of the 25 and 50 ppm TOC standards is ±5% or less
• % Diff between the IC and TC preliminary measurements (for the 50 ppm IC standard) is
±10% or less (as compared to the TC value)
11. Press the OK button to continue.
12. Remove the 50 ppm IC (as Na
2
CO
3
) Standard from the vial port IOS System.
% Diff of TOC Standards = Measured Conc. - Expected Standard Conc.
Expected Standard Conc.
--------------------------------------------------------------------------------------------------------------------
100%
×
% Diff of IC Standard = Prelim. IC Conc. - Prelim. TC Conc.
Prelim. TC Conc.
-----------------------------------------------------------------------------------------------
100%
×