Mini keg - how long conditioning?

[jamesjoystick]

Hey, I did an IPA about 5.5% with 2 weeks in primary and 2 weeks in secondary with dry hopping. I racked the beer to 5 litre mini kegs with one level tablespoon of dextrose each.
How long should I wait (minimum) for the beer to be carbonated? The little c02's don't really carbonate the beer.

 

[EuBrew]

You basically have a big bottle so same time as bottle conditioning, 2-3 weeks at 70 degrees.