CALIBRATION MEASUREMENT MATERIALS

Brand	Owner (click to sort)	Address	Description
PRIMARY CERTIFIED REFERENCE MATERIAL PCRM	I.V. Labs, Inc.	300 Technology Drive Christiansburg VA 24073	calibration measurement materials, namely, chemicals, minerals, trace elements, radioactive materials, isotopics, all of which the chemical composition of the same has been certified and is used in the calibration of measuring instruments for the measurement, calibration, and specific determination of the composition of other materials to be tested;
SRM	U.S. Department of Commerce, National Institute of Standards and Technology	Room 5875 Washington DC 20230	calibration measurement materials, namely, samples of metals, alloys, chemicals, minerals, fertilizers, botanicals, gases, biologicals, carbides, glasses, cements, trace elements, radioactive materials, isotopics, reference fuels, rubber materials, and computer tapes all of which the chemical composition of the same has been certified and is used in the calibration of measuring instruments for the measurement, calibration, and specific determination of the composition of other materials to be tested;STANDARD REFERENCE MATERIAL;
SRM	National Institute of Standards and Technology, U.S. Department of Commerce	Mail Stop 5875 1401 Constitution Ave, NW Washington DC 20230	Calibration measurement materials, for which the biological composition, chemical composition, physical properties or identity of the same has been certified and is used in the calibration of measuring instruments for the measurement, calibration, and specific determination of the composition, physical properties or identity of other materials to be tested; downloadable electronic publications pertaining to calibration measurement materials;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

Descriptions are provided for implementing flowmeter zeroing techniques. In operating a flowmeter, it may be the case that, if not properly calibrated, the flowmeter will produce erroneous measurements, e.g., will indicate a non-zero flow during a period of zero flow. By determining a magnitude of such erroneous measurements, calibration values may be determined, which may later be used to adjust a measurement that is output by the flowmeter and thereby improve an accuracy of the flowmeter. Such calibration values may be determined for a plurality of operational conditions associated with the flowmeter, such as densities of materials being measured, and/or configurations of flow elements associated with transporting material to the flowmeter. Then, the calibration values may be correlated with the relevant operational conditions, and stored for later use. In this way, during an actual operation of the flowmeter, a number of calibration values may be made available, and an optimal calibration value may be selected for an existing operational condition of the flowmeter.