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.
The VAC Procedure. Vacuum-assisted closure (also called vacuum therapy, vacuum sealing or topical negative pressure therapy) is a simple technique where a piece of foam with an open-cell structure is inserted into the wound, and a wound drain with lateral perforations is laid atop it.he application of negative pressure in vacuum-assisted closure removes edema fluid from the wound through suction. This results in increased blood flow to the wound (by causing the blood vessels to dilate) and greater cell proliferation.