The Accu-Chek Aviva Nano blood glucose meter automatically recognizes Accu-Chek Aviva control solutions, so running a control test is easier than ever. First, wipe the tip of the control bottle. Then put the meter on a flat surface, insert the test strip, and squeeze a drop of the control solution onto the front edge of the test strip. A result appears with a flashing “L”. Press one of the arrow keys once to indicate a Level 1 control test or twice to indicate Level 2. Press the ON/OFF button to set the level in the meter. The control result and “OK” alternate in the display if the result is in range.