Cardas Frequency Sweep and Burn-In Record ?

On the Cardas site he speaks about using the record to break in a cartridge. He says the amount of break in varies but he recommends an hour? So does this mean if I use this track to break in a cart I cant leave it in the groove for extended periods of time? Do I risk damaging the cart if I do so? I am trying to break in a Sumiko Blackbird
cart