Alessandro Bias and Matching Meter

Has anyone heard about this device/piece of equipment used to bias power amplifier tubes/power amplifiers? How does it work? Can I use it to bias my audio Research Tube Power Amplifier which has 20 6550 tubes? Please I need your help and advice.
20 6550 tubes? Must be an ARC Ref 600. You don’t need that bias meter, just ship the ARC to me for a free biasing and trial run in my system.
It is the ARC D-250 with (16) matched 6550 power tubes and (4) 6550 regulator tubes.