Omron HEA-230 Instruction Manual page 21

Write the date you first open the bottle on the bottle label. The control
solution must be discarded over three months from the date the
bottle was opened ("discard" date) or on the "expired" date on the
bottle label, whichever comes first. Do not use control solution that is
"expired" or after discard date.
3. Understanding control test results
When the control solution result is within the range on the test strip
vial, the test strips and meter are working properly.
If the result is not within the acceptable range (printed on your test
strip vial), do not use your meter until you solve the problem. Repeat
the control solution test again. If the result continues to be outside of
the expected range, here are some things you can check:
•Did you follow all of the testing instructions?
•Are the test strips or control solution past the "expired" date or
discard date?
•Is HEA-230 meter defective in material or workmanship?
•Does the code number on the meter display match the code number
on the test strip vial?
Repeat the control test with a new test strip. If you still have problems,
please contact your local authorized distributor for more information.
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