You would leave the code the same as the AT2 strips coding...so in your case 38. Please do a few side by side same blood drop comparison using the AT2 meter & AT2 strip against the AT2 meter & FS Lite strip. I did a fair number (about 50 ) of same blood drop comparisons when I started using the FS Lite strips and found them very close. Another thing you could do if you have the control solution is to do a control test with the FS Lite strip and make sure it falls in the specified range. Also, every time I open a new vial of strips I will do a control test.