Key Terms Flashcards
The pressure at any point in the atmosphere due solely to the weight of the atmospheric gases above the point concerned 14.7 psia is at sea level
Atmospheres
Weight of the air comprising the atmosphere 14.7 lb per square inch is the basic reference point for pressure gauges
Atmospheric pressure
Measurement of pressure rqual to 0.987 atmospheres
Bars
A devuce that contains a measurement diaphragm and capacitor plates, changes pressure measurement to an electronic signal
Capacitance signal
Mass per unit volume
Density
An instrument that measures the difference between two pressures points and produces a corresponding output signal for tank level
Diferential pressure (d/p cell)
A push or pull exerted on an object that causes the object to change direction
Force
Most common measurement scale for a monometer measures the level of mercury in pounds per cubic inch
Inches of mercury
A very small measurement of pressure equal to .036 pounds per square inch per inch at 4 degrees celcius
Inches of water
The amount of matter in a body or object
Mass
Manometer a gravity balanced pressure measuring device u shaped
Manometer
When the pressure is less than atmospheric pressure
Vacuum
14.7 psia as its zero point
Psig
Psia
Absolute zero with no pressure at all
A pressure measuring device with two wires
Strain gauge transducer