The series programmable DC power supplies are triple linear output designed with high stability and low noise. It uses 12-bit digital analog converts to control output voltage and current and adopts 4-1/2 digits of analog to digital converter?Amicroprocessor to meet the aims of high precision and high stability. These series instruments also support GPIB with SCPI (Standard Commands for Programmable Instruments) and RS-232 interface make operation easier.