Calibration is a one button process and uses half the gas that other competing brands use. Yes that is correct, half the amount! The instrument uses .25 LPM regulators instead of the typical .5 LPM that almost all other manufacturer's use. This adds up to a significant savings for you over the life of the instrument. For even easier calibration consider the Galaxy Automated Test system which will automate the process further and eliminate your manual paperwork.