#AIR PRESSURE IN PSI MANUAL#
#AIR PRESSURE IN PSI PROFESSIONAL#

The atmospheric pressure varies with temperature and altitude above sea level. This pressure is often called the gauge pressure and can be expressed asĪtmospheric pressure is the pressure in the surrounding air at - or 'close' to - the surface of the earth. Gauge PressureĪ gauge is often used to measure the pressure difference between a system and the surrounding atmosphere. All calculations involving the gas law requires pressure (and temperature) to be in absolute units. The absolute pressure - p abs - is measured relative to the absolute zero pressure - the pressure that would occur at absolute vacuum. The basic unit for mass is slug and the unit for force is pound ( lb) or pound force ( lb f). P = pressure (lb/in 2 (psi), lb/ft 2 (psf), N/m 2, kg/ms 2 (Pa))ġ) In the Imperial - English Engineering System special care must be taken for the force unit.

The equation for pressure can be expressed as: That’s why Bridgestone DriveGuard tires are masterfully engineered to keep you moving for up to 50 miles at speeds up to 50 MPH without disruption.'the normal force per unit area exerted on a imaginary or real plane surface in a fluid or a gas' Of all the pressure gauges out there, they’re the most likely to be weathered, and possibly inaccurate. It’s best to use your personal tire gauge versus those available attached to air hoses at service stations. If you think having to replace the battery will prevent you from using it, it’s best to go with a standard gauge.

#AIR PRESSURE IN PSI PROFESSIONAL#

If you’re not sure which one to purchase, ask a professional technician which he or she prefers.Ī digital tire pressure gauge will provide accurate readings, but don’t forget that it operates on a battery. For just a few dollars, you can find a quality, accurate tire pressure gauge that gives accurate readings. TIRE PRESSURE GAUGE ACCURACYĪccuracy matters and you should keep that in mind when choosing a gauge. Regularly checking your tire pressure is the best way to ensure your tires never dip far below the optimal PSI. Make the above procedure a monthly ritual. Overinflation can result in decreased traction, premature wear, and decreased impact absorption. At this point, it’s ok if you overfilled the tires because you can always let some air back out. Recheck the inflation pressure when the tires are cold.Īfter filling your tires, use the gauge to check pressure again. Using a gas station air compressor means your tires might be “hot.” If it is necessary to adjust inflation pressure when tires are “hot”, set their pressure to 4 psi (14 kPa) above the recommended cold inflation pressure. Fill each tire by placing the end of the hose over the valve stem and pressing on the lever. Insert change into the machine until you hear the motor running. If you’re using the air compressor at a gas station, be sure to park so that the hose will reach all four tires. Many air compressors are different, so read directions carefully to be sure you’re using it correctly. Use an air compressor to refill any tires with low pressure. Write down the reading and repeat this process for all four tires. A digital gauge will show you the reading on a screen. Measurement units are etched into the bar. With a standard gauge, the air pressure will push a small bar out from the bottom of the gauge. Then place the pressure gauge on the valve stem and press down hard enough so the hiss sound disappears and your gauge provides a reading. Remove the valve cap from one of your tires. If your front and rear tires require different pressure levels, write down the correct PSI for each to avoid getting confused as you move around your vehicle checking tire pressure. If you cannot find it, you should consult your vehicle dealer, manufacturer, or a qualified tire professional.

#AIR PRESSURE IN PSI MANUAL#

Look on the driver’s side door jamb or your owner’s manual to find the recommended cold tire PSI for your front and rear tires. PSI is the unit your pressure gauge uses to provide readings. Tires are considered cold when the vehicle has been parked for three hours or more, or if the vehicle has been driven less than a mile (1.6 km) at moderate speed. Vehicle manufacturers specify PSI – literally “pounds per square inch” of pressure – assuming tires are cold.

Air pressure in psi