Stratasys J850 Manual page 10

Interlock Switch
Safety Lock
UV Screening
Stratasys 3D printers are designed to comply with CE and FCC
standards. They are equipped with the following safety features:
The power supplied to the UV lamp, the tray heater and the
motion motors is turned off when the cover is opened.
The cover is locked while the printer is working. If you do
manage to lift it, the UV lamps and the motion motors turn off.
The transparent section of the cover blocks harmful UV
radiation, allowing the operator to view models as they are
being made.