No-source two-wire 4-20mA current loop, compatible with 2, 3, and 4 wire systems. Features 9 programmable outputs for dynamic environment testing, with each segment configurable for run time, A current, and B current. Digital encoder adjustment ensures stable performance不受temperature and humidity影响. Supports connection to positive and negative terminals—works correctly regardless of wiring configuration and will not damage the meter. High precision with excellent linearity (Output accuracy: 0.5%; Display accuracy: 0.01%). Offers coarse and fine adjustment modes for quick and accurate calibration. Output range可设置as 4-20mA (for control devices) or 3-21mA (for debug signals). Display modes include Actual Current, 100.0%, and 50.0Hz, with an LCD screen featuring backlight. Provides linear, calibratable output. Supports automatic or manual output mode. 2-9 quick adjustment output points可设置. Built-in low-power chips ensure ultra-low power consumption, no heating, and stable output. Durable plastic housing with sleek design for easy installation.System Operation: Parameters (Rotate clockwise to increase, counter-clockwise to decrease, press knob to confirm). Press and hold knob for 2 seconds to enter parameter setting mode, displaying F001. Press Confirm to set F001 value: 0 for coarse tuning, 1 for fine tuning, then press Confirm to save. When parameter number FXXX is displayed, use + or - to modify the parameter number. Enter password + - - + to access F002, + - + - for F100, and - + - + for F200.Power supply voltage: 15V–30V Output range: 4–20mA / 3–21mA Display mode: Real Current / 0–100.0% / 0–50.0Hz Sampling resistance: