By reading and following manufacturers directions of course
Somewhere in the side of the motor is a sensor called the oil pressure sensor. Unscrew that sensor and screw in the line for reading the oil pressure. Start the motor up and get your reading. Compare it to specs.
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.
To calibrate a vacuum pressure transmitter, first ensure it is connected to a known pressure source. Apply the vacuum pressure and compare the transmitter's output reading to the actual pressure. Make adjustments if necessary using the zero and span adjustments until the output matches the actual pressure value.
To calculate absolute pressure when a barometer reading is given, simply add the barometer reading to the atmospheric pressure at sea level, which is approximately 101.3 kPa or 14.7 psi. This will give you the absolute pressure at the specific location where the barometer reading was taken.
150 KBps, like 2x is 300KBps, and 3x is 450 KBps reading speeds
Low pressure
Gives a reading of what the pressure in the system is.
Arterial pressure
By reading the manufacturers directions
Same as any other fixture by reading the manufacturers roughing in measurements
gauge pressure