For tests requiring a pressure greater than 10 psi but less than or equal to 100 psi, what is the maximum gauge increment?

The maximum gauge increment for tests requiring a pressure greater than 10 psi but less than or equal to 100 psi is 1 psi. This standard is established to ensure accurate measurements during testing, as a smaller increment allows for more precise monitoring of pressure changes.

Using a gauge with a 1 psi increment helps technicians to detect even minor fluctuations, which can indicate potential issues in a system. In scenarios where precision is critical, such as pressure testing of HVAC systems, adherence to this standard is particularly important to ensure the reliability and safety of the equipment being tested.

Larger increments, such as 2 psi or 5 psi, may fail to capture necessary detail for effective diagnostics, making them unsuitable for this pressure range. Therefore, 1 psi is the most appropriate choice for achieving both accuracy and safety in pressure testing within the specified limits.