Keithley 220 Instruction Manual page 4

Manual Print History
The print history shown below lists the printing dates of all Revisions and Addenda created for this manual. The
Revision Level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are
released between Revisions, contain important change information that the user should incorporate immediately
into the manual. Addenda are numbered sequentially. When a new Revision is created, all Addenda associated
with the previous Revision of the manual are incorporated into the new Revision of the manual. Each new Revi-
sion includes B revised copy of this print history page.
Revision G (Document Number 220-901-01) .............................................................. 1992
Revision H (Document Number 220-901-01) .................................................. August2000