No-source two-wire 4-20mA current loop, wiring for 2, 3, 4 wire system,9 programmable output (can the actual environment of dynamic testing, each section can be set up t running time /A current /b current).Digital encoder adjustment (the use of potentiometer, affected by temperature and humidity, the resistance value will change).Can be connected to the positive and negative (two-wire system, no matter how wiring, can work, will not burn meter),High precision, good linearity (Output accuracy:0.5%;Display accuracy:0.01)Coarse and fine adjustment modes can be set for quick and accurate adjustment,Output range can be set:4-20mA (control device) / 3-21mA (debug signal)Display mode: Actual current/100.0%/50.0Hz, LCD (with backlight).Linear output, calibratableCan be set to automatically output values:automatic / manual2-9 quick adjustment output points can be set chips, ultra-low power consumption, no heat, more stable output.The shell is beautiful and easy to install.System operatio:Parameter :(Rotate one grid clockwise is + Rotate one grid counter-clockwise is -, Press the knob. isConfirm) 1.Press and hold the knob for 2 seconds to enter the parameter setting, Display parameter number F001, Then press Confirm , to Set the value of parameter F001, =0 is coarse tuning; =1 Fine tuning; Then press Confirm to save value.2.When the parameter number FXXX is displayed, + - Rotation modification parameter number; Enter the password first + - - +, To enter the F002 parameter; Enter the password first + - + -, To enter the F100 parameter; Enter the password first - + - +, To enter the F200 parameter.Power supply voltage:15V-30VOutput range:4-20mA/3-21mADisplay mode:Real Current/0-100.0%/0-50.0HzSampling resistance:Less than 500 ohmsOutput accuracy:0.5%Display accuracy:0.01:1 PcColour:As ShownMaterial:plasticSize:79.5x42.2x24mm/3.13x1.66x0.94inchPackage Contents:1 * Signal GeneratorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.