EDL lamps are compatible with all PerkinElmer AA Spectrometers except Models 103,107,290,290b and 820. Note: System 2 EDLs come with two coding plugs: a plug compatible with the Aanalyst series of instruments and a coding plug compatible with earlier instruments having coding capability, for example the Models SIMAA 6000, 5100 (PC), 4110 ZL, 4100 ZL, 4100, 3300, 2100 and 1100(B).