Turnigy Nano-Tech Packs

when you guys meassure the balance thing, do you use the charger ore a seperate multimeter? some charger has not bin proberly adjusted and is not balancing prob.
I suggest to take an balance charge and when its finished meassure the pack with an multimeter, if its over 20mv unbalanced the charger need to be adjusted.

edit
and nether off mine turnigy pack have comed unbalanced "out off the box"