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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 of air to which the microphone under test is coupled.
A dead weight tester (DWT) is a calibration standard method that uses a piston cylinder on which a load is placed to make an equilibrium with an applied pressure underneath the piston. Deadweight testers are secondary standards which means that the pressure measured by a deadweight tester is defined through other quantities: length, mass and ...
The technicians who work in the PMEL will often specialize in one of these sections. The K-Sections are derived from the primary function of the TMDE. This is based upon the calibration authority. Most labs have three calibration sections divided into K1/K8, K5/K6 and K3/K4 that specialize in like test equipment.
Seed oils, including peanut oil and sunflower oil, have been in the news a lot recently. Dietitians explain if seed oils are healthy, and health risks of them.
The eggs included in the recall were sold to 25 Costco stores starting in late November, according to the FDA. If you have the eggs, don’t eat them.
Most canning recipes call for using a boiling water method or a pressure canner, depending on the acidity of the food being canned. Pay attention to the directions, and follow them.
High-accuracy electronic pressure transmitters and transducers Aug 2, 1999 Patriot Sensors & Controls Corp. [10] Position sensors, aviation sensors and tank-level gauges Dec 3, 1999 Drexelbrook Engineering [11] Point and continuous level measurement May 21, 2001 GS Electric [12] Universal and permanent magnet motors Jul 9, 2001 Edax Inc. [13]
Automatic calibration - A U.S. serviceman using a 3666C auto pressure calibrator. An automatic pressure calibrator [13] is a device that combines an electronic control unit, a pressure intensifier used to compress a gas such as Nitrogen, a pressure transducer used to detect desired levels in a hydraulic accumulator, and accessories such as ...