Why does my reading keep showing "333"?

Updated 9 months ago by Chloe Kesler

The 333 code means your meter has not yet been coded to your batch of ketone strips..   

  • In every box of ketone strips there is a special code strip (See video below) The code strip helps calibrate the meter to the electrical resistance of the enzymatic batch.
  • Place the strip in the top of the meter, it will show CH for checking and then display the code that is the same as the code on the side of the vial
  • If you get an E-2 error code, check the year setting on your meter, here is a link to fix that What is the E-2 Error and how do I fix it?

  Below is a how video it is super easy. 



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