T3

Question for Discharging Lipos on Charger

I am planning to use a Hyperion lipo charger to discharge test my new lipos.  It has a USB connection, which I will use to graph data.  My question is: what voltage do I discharge to?  I am unsure of the difference between open loop and closed loop voltage under load.  I know that I should never discharge lipo cells past 3V under load.  When I give my charger a discharge voltage, does it measure under load or open loop?  I'm afraid I will tell it 3.2V per cell, but its measurements will be open loop and it will drain them too low.  Can anyone explain for me?  Thanks.

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