We have printed a few how-to guides on calibrating the various instruments. The ones we have published will be placed on our support page or along with the relevant products. We realize that some instruments are trickier than others so we will shortly be getting Bob Pike, our founder, to demonstrate how you go about calibrating and using various instruments. These videos will eventually be available to download for a small fee or we will sell a DVD video with all the tests being carried out on it.