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Gauge pressure and absolute pressure?
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.
Is gauge pressure is the sum of true pressure and atmospheric pressure?
No, it is the DIFFERENCE between the true and atmospheric pressures.
What is -14.7 psig?
-14.7psig is the gauge pressure of an absolute vacuum.
How to adjust the zero error in pressure gauge?
step-1:remove the pressure gauge from the equipment when machine is in off condition. step-2:remove the cap and glass of the gauge. step-3: remove the needle of the gauge with a needle puller( a special tool ) step-4: place the same needle indicating zero. step-5: fix the glass and cap as usual. step-5: check(calibrate) the gauge on a dead weight tester with a master degital pressure gauge.
Why pressure gauges are to be calibrated?
then i'll ask a question to: how do you know that the answer is completely true which is shown by the pressure gauge?
