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File name EL Series Service Manual (including EL302Tv).pdf

EL Series (including EL302Tv) Power Supplies Service Manual Manual Part Number 48511-0380 Issue 2 Applicability This Service Manual covers models EL301, EL302, EL183, EL561, EL302D, EL302T and EL302Tv from their introduction to the present. Models EL303 and EL155 are covered by a separate manual 48511-0920. Table of Contents Specification 2 Safety 4 EMC 5 Installation 6 General 7 Circuit Descriptions 9 Calibration 11 Parts List 13 Component Layouts & Circuit Diagrams 35 1 Specification MAIN OUTPUTS Voltage Range: 0V to 18V minimum (EL183) 0V to 30V minimum (EL301, EL302, EL302D, EL302T, EL302Tv) 0 to 56V minimum (EL561) Current Range: 0A to 1A minimum (EL301) 0A to 1.1A minimum (EL561) 0A to 2A minimum (EL302, EL302D, EL302T, EL302Tv) 0A to 3.3A minimum (EL183) Voltage Setting: By coarse and fine controls. Current Setting: By single logarithmic control. Operating Mode: Constant voltage or constant current with automatic cross-over. Output Switch: Electronic. Preset voltage and current displayed when off. Output Terminals: Universal 4mm safety binding posts on 19mm (0.75") pitch. Output Impedance: Typically <5m in constant voltage mode. Typically >50k in constant current mode. Output Protection: Outputs will withstand forward voltages of up to 20V above the rated output voltage. Reverse protection by diode clamp for currents up to 3A. Load Regulation: <0.01% of maximum output for 90% load change. Line Regulation: <0.01% of maximum output for 10% line change. Ripple & Noise: Typically <1mVrms (CV mode). (20MHz bandwidth) Transient Load Response: <20