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Thermo Fisher Scientific

MK2 RF Load Coil Changes

Description: 

The release of the iCAP MK2 brings with it a number of hardware changes that impacts RF Load Coil replacement procedures.

Mk1 Coil (4600501) replacement

When fitting an RF coil, verify it is centralized on the torch and that the coil is aligned as in the pictures below. Follow Repair Details for centering and positioning. Note that a Stubby 11mm Spanner Wrench (100mm long) is required.

4600501_DUO.gif

Duo Position

4600501_RADIAL.gif

Radial Position

Mk2 RF Generator Coil (842315550391) replacement 

When fitting an RF coil, verify it is centralized on the torch and that the coil is aligned as in the pictures below. Follow Repair Details for centering and positioning. Note that a 3mm ball tip Allen Wrench is required.

842315550391_DUO.gif

Duo Position

842315550391_RADIAL.gif

Radial Position

Though not perceivable in these photos, the MK2 coil stands much taller than the MK1, so it is much easier to bend and misalign.

Torch Alignment
  • Center tube to Aux tube: 3mm
  • Aux tube to bottom turn of coil: 3.56mm

See the iCAP Torch to Coil Relationship guide.

Also check coil/torch centering. Concentric gap around the torch is ~ 1.3mm (.052"). To verify centering you can run a 1mm allen key around between the torch and coil and bend things if necessary. If the gap is uneven front to back you have a bit of a problem because the coil legs are a fixed length. You can get this problem if the nuts on the coil are over tightened which makes the olives (ferrules) bite deep into to copper and pulls the coil more into fittings on the front of the generator. In some cases it can spread the fitting making it difficult to unscrew the coil. The only way to recover this situation is to replace the coil and make sure not to over tighten it.

Environment:

  • iCAP 6500 Radial
  • iCAP 6500 Dual
  • iCAP 6300 Radial
  • iCAP 6300 Dual
  • iCAP 6200 Dual