Instruction manual

Scanning Tunneling Microscopy (STM)
Low-Current STM
Rev. B MultiMode SPM Instruction Manual 163
2. Use the 0.050" allen wrench, included in the converter kit, to loosen the two retaining screws
which secure the head’s cover. It is not necessary to remove the screws.
3. Pull the cover straight up and off to expose the PC board and electronics. It will appear as
shown below.
4. Remove the op-amp by grasping it and pulling straight up. It should slide out of its socket.
5. Remove the new op-amp from its protective package. The op-amp is stored in conductive
foam and its leads have been preformed to fit the socket. Be careful not to bend any of the
leads. Orient the op-amp so that the metal tab on the edge of the can is in the “10:00” position
as shown below.
CAUTION: Throughout Step 4 - Step 6 below, avoid touching the precision
resistor and capacitor. Any contaminant from the hands, including
body oils, may cause excessive current flow, disabling the head. If
these components are touched, they will have to be recleaned
immediately using highly purified degreasing compounds.
Loosen these two screws.
Op-amp
Precision resistor and capacitor.
DO NOT TOUCH!