Some novel techniques and devices, such as programmable peripheral device, technique of memory page, and the chinese character menus of lcd, are adopted in the meter . all of them simplify the system hardware, improve the reliability, satisfy human-computer interface, and reduce the cost 通过采用单片机可编程外围器件psd,以及psd存储器分页、lcd多级汉字菜单设计等技术,装置硬件结构简单、可靠性好、人机界面友善,性能价格比高。