Linked Scan at Constant E2/V true MS MS:1000331 This child of the former purgatory term linked scan was made obsolete. OBSOLETE A linked scan performed on a sector instrument that incorporates at least one electric sector plus one magnetic sector. The electric sector field, E, and the accelerating voltage, V, are scanned simultaneously, so as to maintain the ratio E2/V at a constant value. This linked scan records a product ion spectrum of dissociation or other reactions occurring in a field free region (FFR) preceding the two sectors.