Abstract: | In order to make a new type of portable measuring instrument, three kinds of functions, such as digital, insulation resistance meter, leakage switch tester, are combined into a new type of portable measuring instrument. ES51921 and high performance microcontroller MSP430F2111 and high performance micro controller and external expansion circuit, LCD display (LCD) and other components, the multi-function test instrument designed to have more features, intelligent features and display intuitive, accurate reading, features, power consumption, small volume, easy to carry and so on. The multi function testing instrument is in accordance with the relevant technical standards. |