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[Column] What is the 4-20mA output of measuring instruments? Is calibration necessary?

Even when the measurement value is 0, it outputs 4mA, and in the case of a disconnection, it becomes 0mA, making it easy to identify abnormalities!

The 4-20mA output is a type of analog output that outputs a current range from 4mA to 20mA, representing 0 to 100%. It is widely used as a standard analog output in measurement instruments due to the numerous advantages listed below: - It outputs 4mA even when the measurement value is 0, and it becomes 0mA in case of a disconnection, making abnormalities easy to identify. - There is no attenuation over long distances of several hundred meters (in the case of voltage output, the longer the distance, the more it attenuates due to resistance). - It is more resistant to noise compared to voltage signals. - Conversion to 1-5V is easy. For these reasons, it is adopted in many devices. *For detailed content of the column, you can view it through the related links. For more information, please download the PDF or feel free to contact us.