Perform a new QC measurement.
If QC result is still out of range Check instrument and verify if correct procedure has been performed.
Do not use contaminated/expired reagents.
Do not re-use empty tubes
Do not mix contents of used tubes
Store Starrsed Control upright, unopened at 18-30 °C.
Always use the same measurement method (30 min or 60 min.) and (if possible) at the same time of the day
Properly mix Starrsed control before use (use roller mixer)
Load/draw Starrsed Control only immediately after mixing and at least 12 complete inversions
Inspect and check general functioning of instrument (valves, vacuum etc.)
Check leveling of the ESR unit
Inspect and if needed clean instrument (nozzles, tubes and pipettes)
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