4 20 Ma Signal Generator Circuit

The data acquisition device measures the regulated current flow.

4 20 ma signal generator circuit.

It is designed for sensor s current signal output simulation meter s testing valve debugging etc. Three wire sensors with a process current output have a separate wire for ground signal 4 20 ma and the power supply. The 4 ma to 20 ma current loop is a common method of transmitting sensor information in many industrial process monitoring applications typically in systems monitoring pressure temperature ph flow or other physical factors. Brt 4 20ma ge series current source 4 20ma signal generator is an integrated low cost panel mounted 4 20ma current source signal generator or 4 20ma simulator module with led display.

The most popular form of signal transmission used in modern industrial instrumentation systems is the 4 to 20 milliamp dc standard. This is an analog signal standard meaning that the electric current is used to proportionately represent measurements or command signals. The 4 20 ma current loop is the prevailing process control signal in many industries. It is also much simpler and cost effective.

The transducer regulates the flow of current through the wires at 4 to 20 ma where 4 ma represents a live zero and 20 ma represents the maximum signal. This homemade calibrator will produce 4 30ma which can be used in place of various sensors giving signal as 4 20ma in its wide range of input. To keep it simple this will simulate 4 20ma or called as 4 20ma signal generator. This configuration is the easiest for current loop beginners to grasp one input for power and a second for the current loop with a common ground.