If a pressure gauge reads 50 psi, what would be the total accuracy change based on the manufacturer's stated accuracy?

To determine the total accuracy change for a pressure gauge reading 50 psi based on the manufacturer’s stated accuracy, it's essential to understand how gauge accuracy is often specified. Manufacturers typically express accuracy as a percentage of the full-scale reading or as a fixed value.

In this case, if the manufacturer indicates that the gauge has an accuracy of ±1% of the full-scale value and the full-scale reading of the gauge is, for instance, 100 psi, then the accuracy would be ±1 psi since 1% of 100 psi equals 1 psi. However, if the gauge's accuracy is given as a specific value independent of pressure range, such as ±0.5 psi, this value would be directly applied to any reading, including 50 psi.

Given that the stated answer is ±0.5 psi, this indicates that the manufacturer has specified a consistent accuracy level that is not dependent on the reading. This is common in instrumentation, where precision is validated throughout the operational range. Thus, the total accuracy change at a reading of 50 psi remains ±0.5 psi because it reflects the consistent performance level expected from this gauge throughout its operating range.

Overall, option B aligns with the typical accuracy specifications for pressure gauges, making