Execute the blank cycle. The software will measure the light absorbance across all 8 filters (340–670 nm).
| | Likely Cause (per Service Manual) | Suggested Fix | | :------------------------------ | :----------------------------------------------------------------------- | :-------------------------------------------------------------------------------------------------------- | | "Reagent Volume Monitoring" | Air bubble in reagent line or empty bottle (the software monitors volume) | Perform a "Prime" operation for the relevant reagent channel. Check bottle caps for tight seals. | | High Background Absorbance | Dirty cuvette window or aging UV lamp | Run an intensive cuvette wash cycle. Use the service menu to check lamp voltages (adjust if necessary). | | Inaccurate ISE Results | Protein buildup in the flow cell or clogged reference junction | Flush the system with XL ISE Cleaning Solution . Perform a full electrode conditioning cycle. | | Probe Crash Error | Bent probe or debris on the sample tray (Crash Detector triggered) | Inspect probe alignment visually. Use the "Jog" commands in the service software to re-home the arm. | | Water Conductivity Low | Degraded deionized water filter or empty water supply | Replace the water filters. The water consumption is typically < 7.5 liters/hour. |
The service manual provides troubleshooting flowcharts that are invaluable for reducing downtime. Problem: Cuvette Contamination (High Blank Values) Worn cuvettes or faulty cleaning station.
Most labs have the Operator’s Manual —the thin booklet that tells you how to turn the machine on, run a sample, and clean the dispensing nozzle. That is not enough.
Move the probe along the Z-axis to calibrate the , ensuring the probe tip stops 1–2 mm above the bottom of the vessel to prevent needle damage.
The heart of the analyzer is the photometer, which measures light absorbance. The manual details:
