SMG7000 Handheld Power Quality Analyzer Input Characteristics 1. Voltage measuring range: 0~400V auto. 2. Current measurement range 3. Clamp transformers (three): 5A/25A (standard) 100A/500A (optional) 400A/2000A (optional) 4. Phase angle measurement range: 0~359.99 �°. 5. Frequency range: 45~55Hz. 6. Voltage number of channels: three channels (UA UB and UC). 7. Current number of channels: three channels (IA IB IC). 8.Maximum number of harmonic analysis: 63 times. 9. Intervals of 1 minute maximum storage period: 18 months