Why does my reading show 733, 737 or....?
If your reading is showing 733, 737 or... no need to worry, you are on the right track.
This is the code that represents the enzymatic batch that the meter is calibrated to. It should match the code that is on the side of your ketone strips. (Glucose strips do not require a code as they utilize a 2+2, AC+DC biosignal).
Take a look at the video below.