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  2. Northern Tool - Wikipedia

    en.wikipedia.org/wiki/Northern_Tool

    Northern Tool + Equipment (commonly referred to as Northern Tool) is a manufacturer and retailer of light industrial equipment and do-it-yourself supplies.Founded in 1981 as Northern Hydraulics, the company was officially renamed to Northern Tool + Equipment and is the owner of several private label brands including NorthStar, Powerhorse, Klutch, Strongway, Ultra-Tow, Roughneck, Gravel Gear ...

  3. Measurement microphone calibration - Wikipedia

    en.wikipedia.org/wiki/Measurement_microphone...

    Calibration using pistonphones and sound calibrators. A pistonphone is an acoustical calibrator (sound source) that uses a closed coupling volume to generate a precise sound pressure for the calibration of measurement microphones. The principle relies on a piston mechanically driven to move at a specified cyclic rate, pushing on a fixed volume ...

  4. Calibration - Wikipedia

    en.wikipedia.org/wiki/Calibration

    Calibration. In measurement technology and metrology, calibration is the comparison of measurement values delivered by a device under test with those of a calibration standard of known accuracy. Such a standard could be another measurement device of known accuracy, a device generating the quantity to be measured such as a voltage, a sound tone ...

  5. Precision measurement equipment laboratory - Wikipedia

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

    Precision measurement equipment laboratory. 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.

  6. Fluke Corporation - Wikipedia

    en.wikipedia.org/wiki/Fluke_Corporation

    Website. www.fluke.com. Fluke Corporation is an American manufacturer of industrial test, measurement, and diagnostic equipment, including electronic test equipment. It was started in 1948 by John Fluke while he was employed at General Electric.

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