User's Guide Model 382260 80W 3-in-1 Switching DC Power Supply
Introduction Congratulations on your purchase of the Extech 80W 3-in-1 Switching DC Power Supply. The Model 382260 has three output ranges that perform like 3 power supplies in one. It can be used for many applications including bench testing, field service, hobby and telecommunication equipment use. This power supply is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.
Power Supply Description 1. Power On/Off switch 2. Output terminals 3. UVL adjustment screw 4. Current adjustment 5. Voltage adjustment 6. Upper Voltage Limit button 7. Preview button 8. Range selector 9. Output On/Off button 10. UVL indicator 11. Constant Voltage indicator 12. Constant Current indicator 13. Overvoltage or Temperature alarm 14. Slave indicator 15. LED Voltage Display 16. LED Current Display 17. Master/Slave switch 18. Master/Slave control terminals 19.
Stand Alone Operation 1. Set the Master/Slave switch located on the back of the unit to the Master position. 2. Without any load attached, use the POWER button to switch on the power supply and the LED indicator will light. There should not be any reading on the voltmeter and ammeter. 3. Press the Output On/Off button and its green LED will light up, the voltmeter will display the previously set output voltage. Use the voltage control knob to adjust the voltage to the desired level. 4.
Master/Slave Operation Two or more Model 382260 Power Supplies can be connected in parallel to increase output current to the sum of the connected supplies. In this mode of operation, the Master power supply will control all of the voltage and current settings of the Slave units. 1. Set all of the power supplies to the same upper voltage limit (UVL) and voltage/current range. 2. Set the voltage and current limit of all of the slaves to maximum values. 3. Switch off all of the power supplies. 4.
Specifications Display Dual 4-digit LED Display Accuracy ±(1% + 2 counts) Voltage Output, DC 0 to 16.4V 0 to 27.6V 0 to 36.8 Current Output, DC 0 to 5.1A 0 to 3.1A 0 to 2.3A Ripple and Noise <30mVp-p Line Regulation < 4mV/<10mA Load Regulation < 20mV/<10mA Efficiency >75% Power Factor >0.
Trouble Shooting PROBLEM Power supply not working INDICATIONS POSSIBLE CAUSES Panel display, LED Indicators not on A. B. No DC output power Voltage meter zero indication. ALM (13) Alarm led on CC (12) led on A. B. C. D. AC power input not connected AC input fuse blown Output on off button not on . UVL (10 ) protection triggered OTP protection triggered Output short circuit Voltage meter reading grossly inaccurate Actual output voltage is grossly different from the meter read out A.
Support line (781) 890-7440 Technical Support: Extension 200; E-mail: support@extech.com Repair & Returns: Extension 210; E-mail: repair@extech.com Product specifications subject to change without notice For the latest version of this User’s Guide, Software updates, and other up-to-the-minute product information, visit our website: www.extech.com Extech Instruments Corporation, 285 Bear Hill Rd.
