GE Sievers 900 Series Operation And Maintenance Manual page 223

3. Select the Maintenance tab and press the Calibrate button.
4. Press the Turbo Ver button.
At this point, the prompts on the Analyzer's display screen will help guide you through the
calibration verification process.
5. Place the sipper tube into the bottle containing the verification blank and press Next.
For the Turbo verification, you will need to sample from the standards containers and must
use the sipper tube (1/16"-OD tubing with a Valco fitting provided in the Analyzer's
accessories kit). If you just performed the Turbo calibration, no hardware change is
required and you can proceed to the next step.
If you did not perform the Turbo calibration, you must change the sample inlet now to use
the sipper tube. Use the 1/4" open-end wrench from the accessories kit to loosen the Valco
nut that connects the stainless steel tubing from the IOS System to the Sample Inlet port;
carefully pull the stainless steel tubing out of the way. Then, attach the sipper tube to the
Sample Inlet port and tighten the Valco nut with the 1/4" wrench by turning the nut 1/8
turn past finger-tight.
6. Place the open end of the sipper tube into the bottle containing the TOC verification
standard (as sucrose), and press Next.
7. When prompted, remove the sipper tube from the bottle containing the TOC verification
standard and place the sipper tube into the bottle containing the IC verification standard
(as Na CO ), and press Next.
2 3
8. After the IC verification standard has been analyzed, the verification summary screen
displays. The calibration verification passes if the following conditions are satisfied:
• RSD for each standard is ≤3%.
• TOC % Diff is ±15% or less for the TOC standard.
• IC % Diff is ±15% or less for the IC standard.
The % Difference value is calculated as follows:
Measured Concentration - Expected Standard Concentration
% Diff =
---------------------------------------------------------------------------------------------------------------------------------------------------------------- -
If these conditions are not satisfied and verification fails, you may need to perform the
calibration procedure again. However, first consult the chapter called "Troubleshooting" on
page 195 to determine if there is a problem with the Analyzer.
9. Press the OK button to continue.
10. If you have an ICR unit, return the lever to the Inline position.
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DLM 90488-01 Rev. A