Thermo Scientific NITON XL3t 500 User Manual page 193

Appendix D:
WARNING! In the highly unlikely event that the x-ray tube remains on
when the trigger is not depressed, disconnect the battery pack immediately
to turn off the x-ray tube, and call Thermo Fisher Scientific's Service
Department in the United States, toll free, at (800) 875-1578, or outside
the United States at +1-978-670-7460, or your local Authorized NITON
Analyzers Service Center.
Thermo Scientific NITON XL3 Analyzer User's Guide Appendices-xi