Technical parameter: 1. Power supply: AC 220V¡À10%, 50 Hz; 2. Ambient temperature: 10¡ãC ~ 35¡ãC; 3. Relative humidity: ¡Ü85%; 4. The instrument should be placed on a flat workbench. Please try your best to lower air convection; 5. The instrument should be placed in a dry area if it is not used; 6. Total power consumption: not more than 300 W