4-20 Internal and External Wiring guides for 4-20, as well as 1-5 VDC across a 250 Ohm Resistor, the 0-5 VDC hookup, and the Pulse Counter connections.
See Video Instructions here
Two page Wiring Diagram below, download here
These diagrams give the details of the circuitry behind the connections you need to use the Mass Flow Meter. Below these are graphical and photographs showing the hookups for those who prefer photos.