IsoPrime User’s Guide
Version 1.01 Background Information Page 201 of 219
3. Carefully pull out the cathode cup and the cathode plate.
4. Use an AIM spanner to undo the clamp collar from the other end of the tube.
5. Pull out the anode assembly without twisting the anode.
6. Remove the O-ring.
7. Place all of the above components in a container with a diluted solvent and clean in an
ultrasonic bath for about 10 minutes. Repeat the process using alcohol for 5 minutes.
8. If necessary, use very fine emery paper to clean the gaps between the strikers and the
shield disc.
9. Adjust the gap between the strikers and the shield disc by bending the striker (not the
shield disc). The gaps between the striker and the shield disc should be maintained in
the range 0.25-0.35 mm.
10. Re-assemble the electrodes in the tube, as indicated in the instruction manual for the
Penning gauge.
ELECTRONICS REPAIR
Warning: only suitably qualified personnel should perform electronics
maintenance operations. Please contact the customer service department or
your local IsoPrime representative if you have any queries.
REMOVAL OF SYSTEM CONTROLLER
The system controller, which is the main electronics unit for the IsoPrime100, is located on the
right hand side of the instrument.
It is recommended that the IsoPrime100 is vented before replacing this unit. However, if the
unit can be replaced in less than 5 minutes, it is not necessary to vent the instrument. In either
case, the following procedure can be used:
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