What is the accuracy of measurement when a pressure gauge reads 5 psi with an accuracy of ±1% of full face value?

To determine the accuracy of the pressure gauge reading of 5 psi with an accuracy specification of ±1% of full face value, it is essential to first define what "full face value" refers to. In this case, the full face value is typically the maximum pressure that the gauge can accurately measure.

If we consider a pressure gauge that reads 5 psi, the full scale or face value is likely either 5 psi or higher, but let's assume the full scale is at least 5 psi for this calculation.

Calculating ±1% of 5 psi:

1. Calculate 1% of 5 psi:

1% of 5 psi = 0.01 * 5 psi = 0.05 psi.

2. Since the accuracy is stated as ±1% of 5 psi, this means that the accuracy or the margin of error around the reading of 5 psi is ±0.05 psi.

However, if the gauge has a higher full face value (for example, if it is a 10 psi gauge or a 15 psi gauge), the accuracy calculation would change accordingly. For simplicity's sake, let’s verify how we would apply the percentage if the full scale was higher.

For