February 8, 2017. The National Institute of Standards and Technology (NIST) is a standards laboratory that is part of the U.S. Department of Commerce. The NIST traceable calibration refers to a program that certifies that the equipment used by labs or manufacturing facilities is properly calibrated according to the industry standards in place.
Quick Answer. VAC is an electrical voltage in an alternating current circuit. The power system supplying homes and businesses in the United States uses AC 120 V, while in Europe the system uses AC 240 V. Continue Reading.
Illinois HVAC Schools. If you are in Illinois youâre aware that the weather keeps on varying, sometimes itâs extremely hot or cold. Air conditions and heaters are constantly on leading to power failure issues come up.VAC stands for Heating, Ventilation & Air Conditioning. You will also see the term HVAC/R when also referring to Refrigeration. Most schools provide certification and training for all HVACR disciplines in a single degree or diploma.