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.
Variable Air Volume (VAV) Products. When coupled with the patented FlowStarâ¢ airflow sensor, ENVIRO-TEC terminals are among the quietest and most accurate airflow control devices in the industry. All applicable terminals are rated in accordance with AHRI Standard 880, and are ETL listed to ensure product integrity and safety compliance.