1, passive two-wire 4-20MA current loop, the wiring is fully compatible with 2, 3, 4 wire system 2,0.01 precision, liquid crystal display, encoder knob, terminal block is not or negative 3, can set the coarse and fine adjustment mode, the number of turns can be set 4, can set the output range: 4-20MA (control equipment) / 3-21MA (debug signal) 5, can be set display mode: actual current / 100.0% / 50.0HZ 6, linear output, can be calibrated 7, can be set to automatically the output value 8, programmable automatic output 1-9 segment 9, can set 2-9 points to quickly adjust the output, the knob directly calls these currents Technical indicators: 1.1Power supply voltage:15V---30V; 1.2Output range:4-20mA/3-21mA; 1.3Display mode: Real Current / 0-100.0%/ 0-50.0Hz; 1.4Sampling resistance:Less than 500 ohms; 1.5Output accuracy:0.5%;Display accuracy:0.01 Colour:grey Material:plastic Contents: 1 x Signal generator Only the above content, other are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.