High Accuracy 4-20mA Current Loop Signal Generator Two wire Transducer Test Features:  This signal generator can use 4-20mA to generate voltage and control the current in the circuit.  Accuracy up to 0.01; Liquid crystal display; Rotary encoder adjustment ; Two connection terminals are non polarity. Output range can be set; 4-20mA (device control) / -21mA (signal debugging) Display mode can be set, it is convenient for you to see the value Linear output can be calibrated; The actual output can be consistent with the display of customer device. Output storage: automatic storage & manual storage. 2-9 programmable outputs: just rotate the encoder to set. Specification:  Item Model: JS-420ISG-V2 Supply Voltage: 15 - 30V Output Range: 4 - 20mA / 3 - 21mA Display: Actual Current / Percentage / Hz Sampling Resistance: ＜500 Ω Output Accuracy: 0.5% Display Accuracy: 0.01 Color: Shown As Pictures Size: Approx. 8 * 4.2 * 4.5cm / 3.14 * 1.65 * 1.77inch Weight: 44g Type: Signal Generator Package List: 1 * Signal Generator 1 * Manual