Special PublicationNational Bureau of Standards, 1968 |
From inside the book
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Page v
... determinations of liquids and solids- Part 4 - MECHANICS Acoustic Measurements 213.011 213.012 213.013 Microphones- Hearing equipment- Sound absorption- Engineering Mechanics 213.041 213.042 213.043 213.044 Hardness tests- Load cells ...
... determinations of liquids and solids- Part 4 - MECHANICS Acoustic Measurements 213.011 213.012 213.013 Microphones- Hearing equipment- Sound absorption- Engineering Mechanics 213.041 213.042 213.043 213.044 Hardness tests- Load cells ...
Page 1-1
... determination of physical constants and properties of materials when such data are of great importance to scientific or manu- facturing interests and are not to be obtained with sufficient accuracy elsewhere . ( 3 ) The development of ...
... determination of physical constants and properties of materials when such data are of great importance to scientific or manu- facturing interests and are not to be obtained with sufficient accuracy elsewhere . ( 3 ) The development of ...
Page 1-11
... determination or three times the st error of the arithmetic mean of n determinations , either being a car value for the measurement process based on considerable recent exper When extended experience is lacking , the terms " computed st ...
... determination or three times the st error of the arithmetic mean of n determinations , either being a car value for the measurement process based on considerable recent exper When extended experience is lacking , the terms " computed st ...
Page 2-2
... determinations of the resistance he standards , or of the resistance of the elements of the bridges or lar apparatus ... determination of corrections is economically feasible . Apparatus of this type may be spot - checked by uring known ...
... determinations of the resistance he standards , or of the resistance of the elements of the bridges or lar apparatus ... determination of corrections is economically feasible . Apparatus of this type may be spot - checked by uring known ...
Page 2-3
... Determination of resistance in oil bath at 25 ° C . standards having resistances in the range 0.0001 oh ohms , inclusive , provided their values fall within 0.2 of a nominal value which is itself a decimal mult submultiple ) of 1 ohm ...
... Determination of resistance in oil bath at 25 ° C . standards having resistances in the range 0.0001 oh ohms , inclusive , provided their values fall within 0.2 of a nominal value which is itself a decimal mult submultiple ) of 1 ohm ...
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Common terms and phrases
accuracy actual costs additional attenuation Attenuation Range Autocollimating available:(a bolometer unit Bureau of Standards calibration or test calibrations not covered capacitance capacitors cavity wavemeter Coaxial coaxial connectors Determination dial Direct inquiries directional couplers Estimated Limits Exposure rate Frequency MHz Frequency Range gage blocks hydrometers inch insertion loss Instr Item Description laboratory length Limits of Uncertainty mark shipments measurements not covered meter method microwave National Bureau NBS Fee Schedule neutron noise temperature nonreflecting ohms percent phase angle Phase Shifters platinum plug and ring Powermeters pyrometers R. W. Beatty R/min ratio reflection coefficient reflection coefficient magnitude resistors ring gages sample scale Section setting signal sources Special calibrations Special measurements specified specimen standard attenuation submitted surface technique Telephone Thermal thermocouple thread Type N connectors uncertainty limits values of emf voltage dividers VSWR waveguide WWVB WWVH zero ει
Popular passages
Page 1-1 - THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the United States of a complete and consistent system of physical measurement; coordinates that system with measurement systems of other nations; and furnishes essential services leading to accurate and uniform physical measurements throughout the Nation's scientific community, industry, and commerce.
Page 1-1 - That the functions of the bureau shall consist in the custody of the standards; the comparison of the standards used in scientific investigations, engineering, manufacturing, commerce, and educational institutions with the standards adopted or recognized by the Government; the construction, when necessary, of standards, their multiples and subdivisions; the testing and calibration of standard measuring apparatus; the solution of problems which arise in connection with standards; the determination...
Page ii - This publication contains a descriptive listing, item by item, of most of the test and calibration work done at the National Bureau of Standards with the respective fees.
Page 1-1 - Cooperation with other governmental agencies and with private organizations in the establishment of standard practices, incorporated in codes and specifications. (5) Advisory service to Government agencies on scientific and technical problems. (6) Invention and development of devices to serve special needs of the Government.
Page 1-1 - The development of methods for testing materials, mechanisms, and structures, and the testing of materials, supplies, and equipment, including items purchased for use of Government departments and independent establishments. (d) Cooperation with other governmental agencies and with private organizations in the establishment of standard practices, incorporated in codes and specifications.
Page 1-1 - States for a complete and consistent system of physical measurements, coordinates that system with the measurement systems of other nations, and furnishes essential services leading to accurate and uniform physical measurements throughout the Nation's scientific community, industry, and commerce.
Page 2-22 - Page 43 shunts, current transformers, and voltage (potential) transformers, should be packed in separate boxes to avoid possible damage to the instruments. Heavy pieces should always be shipped in wooden boxes and held in place, if necessary, by checks or cleats. Large transformers, especially those having oilfilled iron cases, should be crated separately and arranged whenever possible so that the terminals can be made accessible for tests without removing the entire crate. (7) The tops of boxes...
Page 1-1 - ... (c) The development of methods for testing materials, mechanisms, and structures, and the testing of materials, supplies, and equipment, including items purchased for use of Government departments and independent establishments. (d) Cooperation with other governmental agencies and with private organizations in the establishment of standard practices, incorporated in codes and specifications.
Page 5-7 - Kc, for bolometer-coupler units is defined as the ratio of the substituted dc power in the bolometer unit on the side arm of the directional coupler to the microwave power incident upon a non-reflecting load connected to the output port of the main arm.