The purpose of this article is to inform those concerned Fluke is not publishing a Calibration Procedure for the Fluke-377FC or Fluke-378FC do to the special fixture required to test the Field Sense technology.
You would have to send both of the Clampmeters back to the local Fluke Service Center for repair or calibration.
Below is a link to all of the Fluke Service Centers worldwide.
https://www.fluke.com/en-us/support/service-center-locations