Keithley 6521, Instruction Manual, Page: 4 / 65

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 Revision includes a
revised copy of this print history page.
Revision A (Document Number 6521-901-01).............................................................................. September 1994
Addendum A (Document Number 6521-901-02)........................................................................... December 1995
Revision B (Document Number 6521-901-01)....................................................................................... April 2001
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