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  2. Current loop - Wikipedia

    en.wikipedia.org/wiki/Current_loop

    To allow the construction of hybrid systems, where the 4–20 mA is generated by the controller, but allows the use of pneumatic valves, a range of current to pressure (I to P) converters are available from manufacturers. These are usually local to the control valve and convert 4–20 mA to 3–15 psi (or 0.2–1.0 bar).

  3. The 10 Best Air Compressors for Pros and DIYers - AOL

    www.aol.com/lifestyle/10-best-air-compressors...

    Its 3-gallon air tank is matched with a 1.5-hp induction motor that has a maximum psi rating of 135 and produces 2.6 cfm at 90 psi. Plus, it pressurizes the tank from empty to full in just 65 seconds.

  4. Precision measurement equipment laboratory - Wikipedia

    en.wikipedia.org/wiki/Precision_Measurement...

    A Precision Measurement Equipment Laboratory (PMEL) is a United States Air Force (USAF) facility in which the calibration and repair of test equipment takes place. This practice is also known as metrology: the science of measurement. Metrology is defined as the science of weights & measures, while a PMEL is the place where technicians perform ...

  5. Air compressor - Wikipedia

    en.wikipedia.org/wiki/Air_compressor

    Air compressor supplies air into a nail gun.. An air compressor is a machine that takes ambient air from the surroundings and discharges it at a higher pressure. It is an application of a gas compressor and a pneumatic device that converts mechanical power (from an electric motor, diesel or gasoline engine, etc.) into potential energy stored in compressed air, which has many uses.

  6. Joy Compressor - Wikipedia

    en.wikipedia.org/wiki/Joy_Compressor

    The 1970s saw Joy compressors grow in the US domestic market with much focus on engineered custom compressors for refineries and air separation. Joy centrifugal compressors are operated in dozens of applications throughout the world and are integral to the following industries: auto, glass, textiles, petrochemical, snow making, electronics ...

  7. Calibration - Wikipedia

    en.wikipedia.org/wiki/Calibration

    This is called a limited calibration. But if the final measurement requires 10% accuracy, then the 3% gauge never can be better than 3.3:1. Then perhaps adjusting the calibration tolerance for the gauge would be a better solution. If the calibration is performed at 100 units, the 1% standard would actually be anywhere between 99 and 101 units.