OneTouch Ultra Owner's Booklet page 27

Control solution out-of-range results may be due to:
Incorrect unit of measure.
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Error in performing the test.
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Failure to shake the control
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solution vial well.
Improper meter coding.
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Test strip deterioration.
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Meter malfunction.
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mCAUTION: If you continue to get control solution test results that
fall outside of the range printed on the vial, the system may not be
working properly. Do Not use the meter. Call LifeScan Customer
Service at 1 800 227-8862.
Failure to discard the first drop
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of control solution and wipe the
dispenser tip clean.
Expired or contaminated
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control solution.
The meter, test strips, or con-
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trol solution are too warm or
too cold.
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