Section 892.1870 - Radiographic film/cassette changer programmer(a)Identification. A radiographic film/cassette changer programmer is a device intended to be used to control the operations of a film or cassette changer during serial medical radiography.(b)Classification. Class II (special controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 892.9 .48 FR 53047, Nov. 23, 1983, as amended at 84 FR 71819 , Dec. 30, 2019