GE Analytical Instruments ©2010 118 of 226 DLM 74001-04 Rev. A
Chapter 6: Calibration and System Protocols
If the label on the Conductivity Standard shows a different value, press Edit, enter the value, press
Enter, and then press Next to continue.
9. If you have a standard iOS System:
• Open the door to the iOS System and wait 30 seconds for water to drain.
• Insert the first TOC Calibration Blank into the iOS System and press Next.
• When prompted, remove the TOC Calibration Blank from the iOS System, insert the second TOC
Calibration Blank, and press Next.
• When prompted, remove the TOC Calibration Blank from the iOS System, insert the TOC Calibration
Standard (1.50 ppm KHP), and press Next.
• When prompted, remove the TOC Calibration Standard (1.50 ppm KHP) from the iOS System.
Confirm the value of the Conductivity Standard and insert the vial into the iOS System. If the label
shows a value of 25 µS/cm HCl, press Next to continue. If the label shows a different value, press
Edit, enter the value, press Enter, and then press Next. If your configuration does not measure
conductivity, you will not be prompted to enter a conductivity value and you can skip this step.
10. After the last standard has been analyzed, the Calibration Summary screen appears. Part 1 of the
summary screen displays the data for the TOC standard (see Figure 24). Press the Next button.
11. Part 2 of the summary displays the data for the conductivity standard (see Figure 25).
12. Press the Print button if you want to print the Calibration results.
13. The Analyzer indicates if the calibration passed.
• If the calibration passed, press the Apply button to accept the calibration and continue.
• If the calibration failed, press the Cancel button to reject the calibration. You may need to perform
the calibration procedure again. However, first consult the chapter called “Troubleshooting” on
page 153 to determine if there is a problem with the Analyzer.
The summary screens show data collected for each of the vials, as well as several calculated values.
Exp is expected value. For RW IC (TOC Calibration Blank), this is the measured value for the TC channel,
with the UV lamp off. For 1.50ppm TOC (TOC Calibration Standard), this is the expected value for RW2
TOC plus 1.5 ppm. For 25.00 µS/cm tCond (Conductivity Standard), this is the certified value of the
standard, as shown on the vial label.
Diff is percent difference between the average and expected value.
Adj is the adjusted value, with the new calibration applied.
14. Press Exit.
15. If you have a Super iOS system, and selected the After or the Before and After option, the Analyzer will
prompt you to remove the standards, and to insert the rinse cartridge or vials into the Super iOS system
to continue the Rinse activity. Take out the rinse cartridge or vials when completed.
16. If you have a standard iOS System, remove the standards and slide the iOS door closed.
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