In a drive circuit in which a plurality of drive motors are connected to a power source through a protective device which trips when the flow of current is excessive, provision is made to detect which circuit or circuits were active at the time of the failure. Provided herein, is a method for provisioning locked handsets by unlocking them from their established network and relocking them on a new cellular network. The instrument has an ion pretreatment system and a magnetic sector mass analyzer comprising an array detector. The FPhAL is patterned by a lithography process to form a patterned absorption layer.