Final answer:
The typical range displayed on a high-pressure manifold gauge varies but is designed to measure pressures significantly above atmospheric pressure. It shows gauge pressure, which is pressure relative to atmospheric pressure.
Step-by-step explanation:
The pressure range that is typically displayed on a high-pressure manifold gauge depends on the specific application but usually measures pressure much higher than atmospheric pressure.
High-pressure gauges can vary widely but are intended to read pressures significantly above 1 atmosphere (atm). For example, a manifold gauge for HVAC systems might display pressures up to 500 psi or more, which would be equivalent to approximately 34,474 mm Hg, assuming 1 psi is about 68.948 mm Hg.
Given that manometers can measure gauge pressure, the value on a high-pressure manifold gauge would be read as pressure relative to atmospheric pressure, typically ignoring the atmospheric pressure itself, which would read as zero on the gauge.
This range allows for the measurement of a wide range of high-pressure gases and fluids. It is important to refer to the manufacturer's specifications for the specific pressure range of the high-pressure manifold gauge being used.