How long does calibration take? ATI Marketing April 24, 2018 18:45 Updated Follow Calibration takes 7-10 business days from the date we receive your unit. Related articles How much does calibration cost? Where do I ship my unit? 4B and 4B Lite Generator Runtime End of Life Announcement - 2HA, 2HA-N Product End-of-Life Standard Guidelines Comments 0 comments Please sign in to leave a comment.