What is the acceptable resolution for the voltmeter used in the galvanic testing?

The acceptable resolution for the voltmeter used in galvanic testing is +/- 1 mV. This level of resolution is sufficient to accurately measure the potential differences typically encountered in galvanic tests, allowing for reliable detection of voltage variations that could indicate issues with corrosion or other electrical problems in a marine environment.

A voltmeter with a resolution of +/- 1 mV provides a good balance between sensitivity and usability, ensuring that small voltage changes can be monitored without introducing excessive complexity or cost. Higher resolutions, such as +/- 0.1 mV or +/- 0.5 mV, while they can provide more precise measurements, are often not necessary for the practical applications of galvanic testing and could complicate the data interpretation process. Similarly, a resolution of +/- 2 mV may not offer the precision needed to identify subtle but potentially significant voltage differences that could be critical in diagnosing electrical systems. Therefore, the choice of +/- 1 mV aligns well with industry standards and practical requirements for effective testing.