... stability AC power sources,suit for ballast, energy savinglamp,fluorescent lamp etc. 1. AC-DC-AC frequency ... A/D sampling technology,exactly display Voltage5. Current, Power, Power factor, Frequency6. Zero output impedance, equivalent resistance ... current:0-150V is 4.2A,0-300V is 2.1A13. CHP-1000 Output biggest ... current:0150V is 8.4A,0-300V is 4.2A14. Total voltage distortion:≤0.6 ...