SK-4030是一款由日本凯世（KAISE）生产的高精度台式数字万用表，具有0.1%的测量精度和4行显示功能。它配备了模拟条10倍放大功能（ZOOM），能够快速放大测量值，便于观察微小变化，相当于拥有一块高速、高灵敏度的指针万用表。此外，SK-4030还具备比较仪功能，用户可以设定上限和下限值，当测量值超出设定范围时，蜂鸣器和LED会同时发出提示，同时LCD上还会显示测量值。该万用表支持直流电压（0～1000V，分辨率100μV）、交流电压（0～750V，分辨率100μV）、电流（0～20A，分辨率100nA）和电阻（0～40MΩ，分辨率100mΩ）等多种测量功能。它还具备二极管测试、导通测试、数据保持等功能。SK-4030采用1.5V R6P电池和外部AC电源供电，尺寸为80(H)×200(W)×260(D)mm，重量为1360g。其附件包括100-32测试表和6节1.5V R6P电池。该万用表适用于工厂的检查和维修工作，能够有效提高批量检测的效率。

The SK-4030 is a high-precision desktop digital multimeter produced by KAISE of Japan, featuring a measurement accuracy of 0.1% and a 4-line display. It is equipped with a 10x zoom function for the analog bar, which allows for rapid magnification of measured values and is particularly useful for observing subtle changes, akin to having a high-speed, high-sensitivity analog multimeter. Additionally, the SK-4030 has a comparator function that enables users to set upper and lower limits. When the measured value exceeds these limits, both a buzzer and LED will provide alerts, and the LCD will display the measured value. The multimeter supports a wide range of measurement functions, including direct current voltage (0–1000V with a resolution of 100μV), alternating current voltage (0–750V with a resolution of 100μV), current (0–20A with a resolution of 100nA), and resistance (0–40MΩ with a resolution of 100mΩ). It also includes functions for diode testing, continuity testing, and data hold. The SK-4030 is powered by a 1.5V R6P battery and an external AC power source, with dimensions of 80(H)×200(W)×260(D)mm and a weight of 1360g. Its accessories include a 100-32 test lead and six 1.5V R6P batteries. This multimeter is well-suited for inspection and maintenance tasks in factories and can significantly enhance the efficiency of batch inspections.