Accu-Chek performa Owner's Booklet page 53

6. Squeeze the bottle until a tiny drop forms
at the tip. Touch the drop to the front
edge of the yellow window 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.
7. A result appears on the display, along with
a control bottle symbol and a flashing "L".
Do not remove the test strip yet. Press
once to mark it as a Level 1. If you tested
the Level 2 control, press
time.
51
a second