I have an Extech 48VFL PID controller and I was having trouble properly wiring it. I'm connecting it to a thermocouple, heat cartridge, and giving it power with a striped extension cord.
Here is the wiring diagram: http://www.extech.com/resources/48VFL_96VFL_UM.pdf
Here is the wiring diagram: http://www.extech.com/resources/48VFL_96VFL_UM.pdf