YS109 single-phase and high-stability power source
Phase-modulation power source for constant voltage and current; Adopt new technology of transconductance, feedforward magnification and automatic power elevation; Realize excellent performance of fast protection for open circuit of current and voltage short (restore normal function automatically after eliminating outer obstacles); Ideal high stability and credibility power equipment used in metrical station, repairing units, instrument room in fields of metrical department, high school and college, power system, weaving, E&M, metallurgy, ship-making, and air-flight to repair and inspect analog ammeter，AC voltage with five and a half figures, current, power, power factor meter, and various single-phase electrical measuring transducers;

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YS110D type of AC/ DC voltage and current precision source

Adopt new technology of high-stability digital crystal vibration (frequency composition), D/A shift, system feedback adjustment, the sending of regulated voltage and current, fast protection, and other measures. The whole machine has the features such as stability and credibility, nice adjustment, convenient operation, and it also offers users indicator with 41/2 real effective value digital; Deal equipment that inspects and checks AC & DC voltage, current meter, multimeter, digital ammeter;

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YP9 type three-phase high stable power source
Have the features of YS109, and also adopt new technology of crystal vibration, frequency composition, digital phase-shift, sine wave composition, auto-flow of frequency system feedback adjustment; Have the features of strong power, high stability and convenient operation; One necessary calibration equipment for single/three-phase digital, voltage, current, power, phase, frequency and electric energy meter;

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