SECONDARY STANDARDS LABORATORY MEASUREMENT SYSTEM OPERATION PROCEDURE NM-Ol MASS IN AIR 1 MILLIGRAM TO 200 GRAMS

摘要

1.1This procedure describes the operation of a secondary standards laboratory calibration system used to measure mass in air.n1.2The weights under calibration will be referred to herein as the Test Instruments.n1.3The system instrumentation accuracy is given in Section 3. The overall accuracy achieved during instrument calibration, however, must take into consideration the operator errors in manipulation and readout as well as the inherent system accuracy.