Lifescan ONETOUCH ULTRA2 Owner's Booklet page 62

Understanding error and other messages
The OneTouch ®
the test strip, with the meter, or when your blood glucose levels are higher than
33.3 mmol/L or lower than 1.1 mmol/L. Messages do not appear in all cases
when a problem has occurred. Improper use may cause an inaccurate result
without producing an error message.
Message
56
Ultra ® 2 Meter displays messages when there are problems with
What it means
You may have a very
low blood glucose level
(severe hypoglycemia),
lower than 1.1 mmol/L.
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.