Cathodic Protection Tester Practice Exam

Which meter is generally considered more useful in areas with stray current?

1. Digital meter

2. Analog meter

3. Hybrid meter

4. None of the above

The correct answer is: Analog meter

In areas with stray current, an analog meter is generally considered more useful due to its ability to provide a more stable and continuous reading in fluctuating environments. Stray currents can introduce noise and rapid fluctuations that may cause digital meters to flicker or provide inconsistent readings. Analog meters, on the other hand, have a needle that moves across a dial, allowing for easier interpretation of gradual changes in current. This characteristic makes it easier for the operator to observe trends and make rapid assessments in situations where stray current may vary significantly over short periods. Moreover, analog meters are less susceptible to the issues associated with digital signal processing, which can be affected by electromagnetic interference common in environments with stray currents. This stability and resilience in challenging environments make the analog meter a preferred choice when dealing with stray current, leading to more reliable and meaningful readings.