Instek GPS Multi-Output Series     FEATURES: Quad Independent DC Output Four LED Display with 3 digits, selectable for two sets  output voltage and     current display simultaneously Auto Series, Parallel and Tracking Operation Constant Voltage and Constant Current Operation Low Ripple and Noise Overload and Reverse Polarity Protection Selectable for Continuous/Dynamic Load Output Enable/Disable Control Rotation speed of the fan is controlled by heatsink  temperature Jack Type Terminal for Europe (Option)        Data Sheet     User Manual         SPECIFICATIONS       OUTPUT  MODE GPS-4303 GPS-4251 GPS-3303 GPS-2303 CH1 CH2 CH3 CH4 CH1 CH2 CH3 CH4 CH1 CH2 CH3 CH1 CH2 Voltage 0 ~ 30V 2.2~5.2V 8~15V 0 ~ 25V 3~6V 8~15V 0 ~ 30V 5V Fixed 0 ~ 30V Current 0 ~ 3A 1A Max. 1A Max. 0 ~ 0.5A 2.5A Fixed 1A Max. 0 ~ 3A 3A Max. 0 ~ 3A Tracking Series Voltage 0 ~ 60V ---- 0 ~ 50V ---- 0 ~ 60V ---- 0 ~ 60V Tracking Parallel Current 0 ~ 6A 0 ~ 1A 0 ~ 6A 0 ~ 6A         CONSTANT VOLTAGE       OPERATION (CH1, CH2) Line Regulation < 0.01% + 3mV Load Regulation < 0.01% + 3mV (rating current < 3A) < 0.02% + 5mV (rating current > 3A) Ripple & Noise < 1mVrms 5Hz ~ 1MHz Recovery Time < 100µS (50% Load change, Minimum load 0.5A)       CONSTANT CURRENT       OPERATION (CH1, CH2) Line Regulation < 0.2% + 3mA Load Regulation < 0.2% + 3mA Ripple & Noise < 3mArms       TRACKING OPERATION       (CH1, CH2) Tracking Error < 0.5% + 10mV of the Master Series Regulation < 300mV Load Regulation < 0.01% + 3mV Ripple & Noise < 2mVrms 5Hz ~ 1MHz       GSP-4303       2.2V ~ 5.2V OUTPUT (CH3)       GPS-3303       5V FIX OUTPUT (CH3)       GSP-4215       3V ~ 6V OUTPUT (CH3) Line Regulation < 5mV Load Regulation < 15mV Ripple & Noise < 2mVrms, 5Hz ~ 1MHz Voltage Accuracy + 5% rdg Current Output GPS-4303:1A, GPS-3303:3A GPS-4215:2.5A       GPS-4303/4215       8V ~ 15V OUTPUT (CH4) Line Regulation < 5mV Load Regulation < 10mV Ripple & Noise < 2mVrms, 5Hz ~ 1MHz Current Output 1A       METER Digital 3 digits 0.5" LED display GPS-4303/3303/4251 Out ON Accuracy ±(0.5% rdg + 2 digits) GPS-4303/3303/4251 Out OFF Accuracy ±(0.5% rdg + 8 digits) GPS-2303 Accuracy + (0.5% rdg + 2 digits)       INSULATION Chassis and Terminal > DC 500V / 20MΩ Chassis and AC Cord > DC 500V / 30MΩ       POWER SOURCE AC 100V/120V/220V+10%, 230V+10%~-6%, 50/60Hz       ACCESSORIES Instruction manual x 1, Power cord x 1, GPS-4303: Test lead GTL-104 x 2, GTL-105 x 2 or GTL-203 x 2, GTL-204 x 2 GPS-4251: Test lead GTL-105 x 4 or GTL-203 x 2, GTL-204 x 2 GPS-3303: Test lead GTL-104 x 3 or GTL-203 x 3 GPS-2303: Test lead GTL-104 x 2 or GTL-203 x 2       DIMENSIONS & WEIGHT 255(W) x 145(H) x 265(D) mm, Approx. 7 kg