Hi... I just got a new meter, one of the ones that this site gives away (Bayer)... I thought I would test it against the one I usually use(bog standard Boots brand meter). The boots meter gave me a reading of 13.4, the new one gave me a reading of 11.7. Not sure which one to trust! Any ideas how a meter can be calibrated or the output validated?
Cheers,
Andrew
Cheers,
Andrew