This error appears when the control solution is too warm to produce an accurate result.
What to do:
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Allow the control solution to cool down to room temperature (15–30°C / 59–86°F).
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Do not refrigerate or freeze the solution — let it cool naturally.
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Once cooled, repeat the test using a new strip and the same solution.
If the error continues to appear, contact Customer Support:
www.diabetes.ascensia.com/contact-us