What is a loop simulator in a 4 to 20 mA loop?
A. A device that measures current in the loop
B. A device that displays the process variable
C. A device that provides electrical isolation
D. A device that simulates the transmitter output signal
Answer:D
What is a loop simulator in a 4 to 20 mA loop?
A. A device that measures current in the loop B. A device that displays the process variable C. A device that provides electrical isolation D. A device that simulates the transmitter output signal
Explanation: A loop simulator is a device used to simulate the output signal of a 4 to 20 mA transmitter. It typically provides a stable current source that can be used to verify the operation of the loop receiver, such as a controller or recorder.