How long should the ammeter have a resolution of at least?

To ensure precise and accurate measurements in electrical applications, an ammeter should have a resolution that allows for detailed readings without introducing significant uncertainty. A resolution of ±1 mA strikes a good balance between sensitivity and usability, making it suitable for most marine electrical applications where slight variations in current can be critical for performance assessments and safety checks.

This level of resolution allows users to detect and respond to minor fluctuations in electrical current, which is particularly important in environments where optimal performance is essential, such as in systems involving batteries, generators, and electronic devices on a boat. With a resolution of ±1 mA, the ammeter provides sufficient granularity for effective monitoring while remaining easy to read and interpret, ensuring operators can make informed adjustments as necessary.

While a finer resolution would offer increased sensitivity, it may not be practical in every scenario due to the potential for measurement noise and may complicate the reading process for users. Therefore, the choice of ±1 mA reflects an optimal compromise for typical applications, affirming that this resolution is indeed the appropriate standard in the context presented.