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What it means
The meter has detected a
problem with the test strip.
Possible causes are test strip
damage or an incompletely filled
confirmation window.
What to do
Repeat the test with a new test strip. Refer to blood application
(see Section B, Testing your blood glucose) or control solution
testing (see Section C, Control solution testing).
What it means
You may have a very low blood
glucose level (severe hypoglycaemia),
lower than 20 mg/dL.
What to do
This may require immediate treatment according to your
healthcare professional’s recommendations. Although this
message could be due to a test error, it is safer to treat first
and then do another test.
NOTE: There is no Error 6 message.
What it means
You may have a very high
blood glucose level (severe
hyperglycaemia), above
600 mg/dL.
What to do
Re-check your glucose level. If an Er 8 message appears
again, obtain and follow instructions from your healthcare
professional without delay.
What it means
The meter has detected that
the temperature is above or
below the system operating
range. Do Not perform a test
until the meter and test strips
reach a temperature within
the operating range of 10–44°C.
What to do
Repeat the test after the meter and test strips have reached a
temperature within the operating range.
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