Tag: controller current loops

A fundamental principle in instrumentation system troubleshooting is that every instrument has at least one input and...

Some self-powered (4-wire) analog electronic transmitters are designed to behave as electrical loads rather than as...

It is possible to convey electrical power and communicate analog information over the same two wires using 4...

DC electric current signals may also be used to communicate process measurement information from transmitters to...

The simplest form of 4-20 mA current loop is the type used to represent the output of a process controller, sending a...

A 4 to 20 mA current signal represents some signal along a 0 to 100 percent scale. Usually, this scale is linear as...

An “analog” electronic signal is a voltage or current proportionate to the value of some physical measurement or...