Standard Power Source,Standard Source, Current Source,Voltage Source,High accuracy Source,AC Power Source Application It is suitable for power department, measuring department, quality control department, research units, ... / °CLong-term stability: 4 PPM/year Work power 220 (±5%) V, AC/frequency 50 Hz. Volume and weight Size: 420 ... °C ~ 60 °C GF101 Program-controlled Single-phase Standard Power Source