Current-loop measurements

RGterminals可以配置为使模拟当前measurements using theCurrentSE()instruction. When configured to measure current, terminals each have an internal resistance of 101 Ω in the current measurement loop. The return path of the sensor must be connected directly to theRGterminal.The following image shows a simplified schematic of a current measurement.

Example Current-Loop Measurement Connections

The following table shows example schematics for connecting typical current sensors and devices. See alsoCurrent-loop measurement specifications.

Sensor Type	Connection Example
2-wire transmitter using data logger power
2-wire transmitter using external power
3-wire transmitter using data logger power
3-wire transmitter using external power
4-wire transmitter using data logger power
4-wire transmitter using external power