What is the most common cause of a 4 to 20 mA loop failure?
A. Open circuit in the loop
B. Short circuit in the loop
C. Transmitter failure
D. Receiver failure
Answer:A
What is the most common cause of a 4 to 20 mA loop failure?
A. Open circuit in the loop B. Short circuit in the loop C. Transmitter failure D. Receiver failure
Explanation: The most common cause of a 4 to 20 mA loop failure is an open circuit in the loop, which can be caused by a broken wire or a loose connection. This can lead to a loss of signal and a failure of the receiver to measure the process variable. Short circuits in the loop can also occur, but they are less common.