Introduction of the products The PAN series is an automatic constant voltage/constant current shifting regulated DC power supply equipped with the phase control pre-regulator. A series regulator system is used to assure low-noise and stable output. The PAN series are featured with the following points. • The two distinctly visible LED display units on the front panel display output voltage, output current and various preset data. • The output control potentiometer (for voltage and current presetting) is of a 10-turns wire-wound design, and allows precise setting. • Electronic switch for low chattering and noise is used to turn on and off the power output. • Using external voltage or external resistor, output voltage and current can be remote-controlled. With the GPIB interface available with our PIA3200, an automatic testing system can be formed. • The phase control pre-regulator is furnished with a choke input smoothing circuit, which decreases apparent input power and suppresses harmonic components in the input current. Therefore, potential effects on the power line, such as input voltage distortion, are decreased. • High-speed transient response of 50 j± s allows it to follow a sudden load change. • Carefully selected parts, improved circuit, and forced air cooling heat dissipation combine to produce an excellent low temperature drift of 100 ppm/°C (constant voltage characteristic). • To protect a load from unexpectedly excessive voltage, the unit includes a built-in OVP (over-voltage protection) circuit capable of handling voltages 10-110% of the rated output voltage. With the above-mentioned features, PAN series units offers a wide range of applications to laboratory experimental equipment, test equipment for mass-production lines, power supply for aging, etc.