A 0 to 20 mA current source to a 4 to 20 mA loop current converter module circuit. The RSPAN & RZERO potentiometers can be multiturn PCB mountable types for precision adjustment. Q1 should have a heatsink
Figure 1. A 0 to 20 mA current source to a 4 to 20 mA loop current converter module circuit. The RSPAN & RZERO potentiometers can be multiturn PCB mountable types for precision adjustment. Q1 should have a heatsink