Can be connected to the positive and negative (two-wire system, no matter how wiring, can work, not burn meter),High , good linearity (Output accuracy:±0.5%;Display accuracy:0.01) 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). 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) Digital rotary encoder adjustment (the use of potentiometer, easily affected by temperature and humidity, the resistance value change). Display mode: Actual current/100.0%/50.0Hz, LCD (with backlight)., Weight: 0.13448197982 pounds, Manufacturer: Jaywool