介紹了一種新型小電阻測試儀的測量原理及其系統設計，包括系統的硬件和軟件設
計。該儀器選用CYGNAL 公司的低功耗單片機C8051F005 作為核心，具有數據存儲、通訊以及LCD 顯示等各種功能。該測試儀具有低功耗、高精度、攜帶方便等特點，除了在實驗室實用外，特別 適于在工作現場的測量，把所測得的數據保存在單片機里，然后輸入上位機，通過上位機強大的 功能對數據進行分析處理。
[關鍵詞] 小電阻；測試儀；C8051F005；單片機

A measuring instrument of little resistance by using C8051F005 chip microcomputer
(China University of Mining & Technology, Jiangsu Xuzhou 221008,China) Abstract: This paper presents the measuring principle and design of a new portable measuring instrument of little resistance, including its design of hardware and software. The ultralow-power C8051F005 produced in CYGNAL Corp has been as the core of this system, and so this instrument can complete data memorizing, communication, LCD displaying and other functions. Lower power-consuming, high accuracy and portable are all its peculiarities. So in particular it can be properly used in work field besides in the lab, the data sampled can be saved in the microcomputer and transferred to computer, data processing can be done by computer.
Key words: Little Resistance; Measuring instrument; C8051F005 ;chip microcomputer