Control Solution - Glucose
Instead of applying blood to the strip you apply the control solution. Wipe clean the cap of the control solution and place a blob of it on the top of the cap.
When you test with the control you want to match the code on the control solution bottle with the control number on your strips(vial/bottle). The control solution bottle will either have a W2 or B3 code then you will compare that with the strip vial under control solution range.
If your numbers using the control test lands in this range the control is reading then the meter is correct.