What is the purpose of a shunt resistor in a 4 to 20 mA loop?
A. To provide a voltage reference for the transmitter
B. To increase the voltage across the transmitter
C. To reduce the voltage across the transmitter
D. To measure the current flowing through the loop
Answer:D
What is the purpose of a shunt resistor in a 4 to 20 mA loop?
A. To provide a voltage reference for the transmitter B. To increase the voltage across the transmitter C. To reduce the voltage across the transmitter D. To measure the current flowing through the loop
Explanation: A shunt resistor in a 4 to 20 mA loop is used to measure the current flowing through the loop.