Ascensia Contour Normal Control Solution A sugar water solution, which is used to test the accuracy of the meter. For use with the Ascensia CONTOUR Blood Glucose Monitoring System. Control Tests Should Be Performed: With each new vial of test strips When you change your batteries Monthly To Perform A Control Test: Apply a drop of control solution to the test strip instead of a drop of blood. Compare the results to the control range. (You can find the range on the side of the vial of test strips). If the results are inside the range printed on the vial, your meter is functioning correctly. If the results are outside the range, you should call the manufacturer of your meter immediately.