GE Sievers 900 Series Operation And Maintenance Manual page 152

1. If the Analyzer is taking measurements, press the Stop Analysis button.
2. If you have an ICR unit, make sure the lever is in the Bypass position.
3. Remove the protective cap from the standards vials, and avoid touching the septa to
protect against introducing foreign particles.
4. Press the Menu button, select the Maintenance tab and press the Suitability button.
At this point, the prompts on the Analyzer's display screen will help guide you through the
system suitability verification process.
5. Insert the Reagent Water (Rw) into the IOS System and press Next.
6. When prompted, remove the Reagent Water (Rw) from the IOS System, insert the 500 ppb
Sucrose Standard (Rs), and press Next.
7. When prompted, remove the 500 ppb Sucrose Standard (Rs) from the IOS System, insert
the 500 ppb Benzoquinone Standard (Rss), and press Next.
8. After the 500 ppb Benzoquinone Standard Solution (Rss) has been analyzed, the System
Suitability Values screen is displayed (see Figure 27). The Analyzer indicates if the system
suitability passed or failed based on the following criteria:
Acceptance criteria for USP System Suitability is response efficiency between 85% and
115%.
Response efficiency is calculated as follows:
Response Limit is calculated as follows:
9. Press either the Apply or Cancel buttons, depending on whether you want the new data to
be saved as the Analyzer's response limit.
If you apply the Response Limit, this new value determines when to trigger the Analyzer's
Response Limit alarm, when activated (see "Setting Alarm Values" on page 110).
10. Remove the vial from the IOS System and slide the door closed.
11. If you have an ICR unit, return the lever to the Inline position.
GE Analytical Instruments ©2009
(Rss - Rw)
×
RE =
--------------------------- -
(Rs-Rw)
Response Limit = Rs - Rw
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