REPAIR / MAINTENANCE

 


PRECAUTION: Turn off power supply to multisample probe before doing any maintenance or repair.

 

REPLACING CURRENT LEAD:

 

 

 

Fig.1:  Shows the Multisample Selector with Contact posts exposed at the bottom.
 

 

 

 

 

  1. Remove solder for the respective current lead at sample selector.
  2. Remove sample holder covers.
  3. Remove retaining screws at sample selector for the respective current lead.
  4. Remove retaining screws at sample holder for all current leads.
  5. Unscrew bolt from sample holder assembly.
  6. Carefully remove current leads from sample holder.
  7. Remove sample holder and support.
  8. Bend the respective current lead into as straight a profile as possible.
  9. Remove seal of the respective current lead at flange.
  10. Slide current lead through flange and spacers (downward).
  11. Replacement of current lead is in the opposite order as removal.

 

 

 

 

 

 REPLACING VOLTAGE WIRE:

 

  1. Remove KF-40 clamp to expose the back of the 19-pin connector.
  2. Remove the solder used to connect the voltage wires to the 19-pin connector.
  3. Remove sample holder covers.
  4. Unscrew bolt from sample holder assembly.
  5. Remove retaining screws at sample holder for all current leads.
  6. Carefully remove current leads from sample holder.
  7. Remove sample holder and support.
  8. Unscrew retainers from lower spacer and lower probe body.
  9. Slide lower spacer out of lower probe body.
  10. Remove voltage wire bundle from stainless steel tubing.
  11. Thread new voltage wire bundle through stainless steel tubing.
  12. Follow the opposite order to replace parts removed.

 

 

REPLACING CURRENT CONTACTS:

 

Note: The following procedure can be used for both upper and lower current contact with a few minor differences. In the case of the upper current contact, it is attached to the positive power supply in the same way that the lower current contacts are attached to the current leads.

 

Fig.2:  Current contact and contact post
 
 

 

 

 

 


  1. Remove solder and retaining screw for the respective current lead at sample selector.
  2. Remove retaining setscrew for the respective current contact.
  3. Slide current contact (contact and contact post) out of the selector.
  4. Replacement will follow the reverse order of the steps listed above.