800psig.
Gives a reading of what the pressure in the system is.
To convert gauge pressure to absolute pressure, add the atmospheric pressure to the gauge pressure reading. This will give you the total pressure, including the pressure exerted by the atmosphere.
gauge pressure
The absolute value of the blood pressure gauge reading is the positive value of the number shown on the gauge, regardless of whether it is above or below zero.
Either your oil pressure gauge is reading low , your engine temperature gauge is reading high , or your fuel gauge is reading low so your almost out of gas
You will need to remove your oil pressure sending unit and install a mechanical gauge to get a true reading. You need to start out cold and write down the pressure reading and also once it warms up to operating temperature. If the pressure gauge is not the same as the mechanical one you have a bad pressure switch.
To use a water pressure gauge effectively, first attach it to a water source, such as a faucet or hose. Turn on the water and observe the gauge to see the pressure reading. Make sure to check for any leaks or fluctuations in pressure. Adjust the water flow if needed to maintain a consistent pressure reading.
Gauge pressure is what you get when you take the reading from your tire pressure gauge. Absolute pressure is the pressure inside your tires plus the atmospheric pressure, which is roughly; 14.7 psi, 101.3 kPa (kilo-Pascals), or one atmosphere. Absolute pressure measures all of the pressure on your tires, inside and out, whereas gauge simply measures the pressure inside the tire.
The maximum reading of a micrometer screw gauge depends on the number of divisions on the thimble and the barrel. Typically, it can measure up to 25 millimeters with a resolution of 0.01 mm on the main scale and an additional fraction of a millimeter based on the thimble divisions.
An air gauge measures pressure relative to the atmospheric pressure, while a water gauge measures pressure relative to its own density. Water is denser than air, so the air gauge reading will be 3 times higher than the water gauge due to the difference in reference points for each gauge.
Take the wire loose from the oil sending unit and then turn the key on and ground the wire to the engine somewhere and the gauge in the truck should go all the way past the highest point. If it don't then the gauge in the dash is bad are the wire going to it ( The 1 you grounded ) is broken. If the gauge is reading low oil pressure, Then unscreew the oil sending unit on the engine just behind the distributor, were you took the wire loose from. Then install a OIL PRESSURE GAUGE into it's place. Then start the engine and read the pressure, Now compare the reading on the dash gauge to what you are reading on the oil gauge.
To check tire pressure with a gauge, first remove the valve cap from the tire. Press the gauge onto the valve stem firmly to get a reading. Compare the reading to the recommended pressure in the owner's manual or on a sticker inside the driver's side door jamb. Add or release air as needed to reach the correct pressure. Replace the valve cap when finished.