1. 电压测量范围：0-±2000V

2. 最小误差0.5V

3. 结果可显示四位半数值

4. 输出数据用LCD液晶显示

5. 用ICL7135实现数字量的转换

6. 用ICL7660产生-5V电压

7. 核心控制部件采用单片机控制，不需要看门狗电路，直接利用单片机资源。

-1. Voltage measuring range: 0- ± 2000V 2. The smallest error of 0.5V 3. The results show the four semi-numerical 4. Output data using LCD liquid crystal display 5. ICL7135 with the realization of digital conversion 6. ICL7660 produced by voltage-5V 7. the core of control parts of single-chip control, watchdog circuit does not require direct use of single-chip resources.