EXFO FIP-400B Fiber Inspection Probe and ConnectorMax2 - Manual (Page 61)

Inspecting Fiber Ends
Fiber Inspection Probe 55
Inspecting Fiber Ends (Multifiber)
9. Choose the type of connector you want to use between MTP/MPO
(selected by default) or Optitap.
10. Depending on the probe you are using, proceed as follows:

If you have an FIP-420B, activate the auto centering.

If you have an FIP-430B, activate the auto centering and the auto
focus.
For more information, see Analyzing Captures on page 64.
11. Set the probe to Low Magnification and locate the first fiber.