Constant Pressure Chart: A chart of a constant pressure surface in which atmospheric pressure is uniform everywhere at any given moment. Elements may include analyses of height above sea level, wind, temperature, and humidity.

 

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Constant Pressure Chart: A chart of a constant pressure surface in which atmospheric pressure is uniform everywhere at any given moment. Elements may include analyses of height above sea level, wind, temperature, an . . . View Full Definition

Pressure Gauge: A water level gauge that is operated by the change in pressure at the bottom of a body of water due to the rise and fall of the water level. See gas purged pressure gauge.

Pressure Gradient: The amount of pressure change that occurs over a fixed distance at a fixed altitude.

Pressure Characteristic: The pattern of the pressure change during the specified period of time, usually the three hour period preceding an observation. This is recorded in three categories: falling, rising, or steady.

Pressure Change: The net difference between the barometric pressure at the beginning and ending of a specified interval of time, usually the three hour period preceding an observation.

Pressure Altitude: The altitude in standard atmosphere at which a given pressure will be observed. It is the indicated altitude of a pressure altimeter at an altitude setting of 29.92 inches of mercury, and is . . . View Full Definition

Pressure Jump: A sudden increase in the observed atmospheric pressure or station pressure.

Pressure Port: A threaded orifice which can be fitted with a pressure gauge or pressure transducer for determining the pressures within a motor while in operation.

Pressure Tendency: The pressure characteristic and amount of pressure change during a specified time period, usually the three hour period preceding the observation.

Pressure Transducer: Outputs electrical signal proportional to pressure.