Accu-Chek Aviva Owner's Booklet page 21

7. Squeeze the bottle until a tiny drop forms at the
tip of the bottle. Touch the drop to the tip of the
yellow window of the test strip. Do not put
control solution on top of the test strip. When
you see flash, you have enough control
solution in the test strip. Wipe the tip of the bottle
with a tissue then cap the bottle tightly.
Chapter 2: Control Testing
8. A result appears on the display, along with the
control bottle symbol and a flashing "L." Do not
remove the test strip yet. Press
mark the result as a Level 1. If you tested the
Level 2 control, press
19
once to
a second time.