you put it into your calibration system? or by Cert date? We get new torque wrenches and most of them are over 6 months old in the box and some up to a year.
So we have the bean counter side say its when we put it into our system and the quality side saying go with what ever the cert says.
I am not so sure about that. If we write our policy that its life starts at when it is logged into our system is based on our calibration sticker system.