How can you diagnose a broken wire in a 4 to 20 mA loop in a simple way without disturbing the circuit?
A. Measure the loop impedance
B. Measure the voltage drop across the loop
C. Measure the current in the loop
D. Measure the resistance of the loop
Answer:B
How can you diagnose a broken wire in a 4 to 20 mA loop in a simple way without disturbing the circuit?
A. Measure the loop impedance B. Measure the voltage drop across the loop C. Measure the current in the loop D. Measure the resistance of the loop
Explanation: To diagnose a broken wire in a 4 to 20 mA loop, you can measure the voltage drop across the loop using a voltmeter. If the voltage drop is zero or very low, this indicates that there is a break in the loop somewhere. By tracing the wiring and checking for loose connections, you can identify the location of the break and repair it.