The newly upgraded AT3817A adopt true color TFT-LCD display and full Chinese operation interface (configurable into English). Displayed in large fonts, readings are more intuitive, used for laboratory quality control, feed inspection and component sorting. AT3817A with continuous frequency point of 50Hz~100kHz with a resolution of 0.001Hz. Test signal level 0.01Vrms ~ 2.00Vrms (10mV step), (add DCR measurement and internal DC bias (DC BIAS, ±2.5V) compared to AT28 series) AT3817A can test the 4 parameters of the component at the same time. Each parameter can be arbitrarily configured. The newly improved instrument realizes full 6-bit display of the main and auxiliary four parameters. It can scan 10 kinds of frequencies or level lists, it can also be used for 3 groups users frequency be corrected to improve accuracy. Built-in comparator, through HANDLER interface combined with PLC to complete automatic sorting of components. Test parameters: L, C, R, Z, D, Q, θ (deg), θ (rad), Vm, Im; Accuracy: 0.05%, 3.5 吋 Liquid crystal display: Main 999999 Sub 999999 Test frequency: 50~100kHz 16 frequency point; level: 0.01V~2.00V in 10mv step, output impedance: 30/50/100Ω Function: three parameters display, up to 30 times / sec, 20 groups of records, 14 files sorting, RS232 and ExHandler interface