Measurement Cycle; Cell Wash; Sample Capture; Optics Testing - Thermo Scientific Orion 2230XP User Manual

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Section 6 Calibration of the Instrument for Measurement Analysis
44  Thermo Scientific Orion

Measurement Cycle

The Orion 2230XP Silica Analyzer follows a sequence of steps or events for performing the
analysis cycle. They are:

1. Cell Wash

2. Sample Capture

3. Optics Testing

4. Test Reaction Temperature (when enabled)
5. Adds Reagent 1 and 2
6. Blank Measurement
7. Adds Reagent 3
8. Collect Data and Output Result
9. Post Wash
Cell Wash
In cell wash the sample is pumped into the reaction cell. The user is allowed to edit the volume
of the sample to be pumped by the parameter called CELL WASH VOLUME. To edit the cell
wash volume, from the MAIN MENU follow the sequence:
MENU ➔ SETUP ➔ METHOD ➔ CELL WASH VOLUME
In cell wash volume, the positive volume is to pump the sample into the reaction cell, and the
negative volume is to pull back an amount below the drain after the cell wash is completed.
During the cell wash, the stirrer is on and the info field (if enabled) shows the sample pumping
progress with a progress bar, along with the volume pumped.
Sample Capture
In the sample capture step, the stirrer is switched off and fluid is allowed to settle for 5 seconds
to drain any excess from the reaction cell overflow drain.
During the sample capture, the info field (if enabled) shows the 5 seconds countdown.
Optics Testing
In optics testing, the system checks the optical path and status of the LED source.
During this stage in the cycle, the info field (if enabled) shows the test optics progress bar which
times out at a maximum period of 90 seconds.
2230XP Silica Analyzer