How to Troubleshooting  4 -20 mA Current Loops with Loop Calibrator?

How to Troubleshooting  4 -20 mA Current Loops with Loop Calibrator?

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Introduction Special-purpose electronic test instruments called loop calibrators are manufactured for the express purpose of 4-20 mA current loop circuit troubleshooting. These versatile instruments are generally capable of not only measuring current, but also sourcing current to unpowered devices in a loop, and also simulating the operation of…