SI series is a combination of electrical performance testing micro-controller core, the use of Precision Measurement Technology and Intelligent identification technology to produce for household and similar electrical appliances for testing the equipment. With a wide measurement range, LCD display multiple parameters simultaneously, both communications and printing interface. SI-61 Combined Test electrical performance, safety and more in the original combination of electrical properties of SI-41 test instrument based on the increase power and low voltage start, and further based on the SI-41 to improve its automated testing function and reliability. Combination of electrical properties of SI-62 cabinet security testing products to meet the high-power test. Meet the national standard GB4706.1 the standards.