Special PublicationNational Bureau of Standards, 1968 |
From inside the book
Results 1-5 of 91
Page 1-11
... uncertainty attached to the numerical values rep Limits of uncertainty usually comprise ( 1 ) an estimate of systematic plus ( 2 ) a value of imprecision . ( 1 ) Often the systematic error estimate is based on experie judgment ...
... uncertainty attached to the numerical values rep Limits of uncertainty usually comprise ( 1 ) an estimate of systematic plus ( 2 ) a value of imprecision . ( 1 ) Often the systematic error estimate is based on experie judgment ...
Page 1-12
... Uncertainty of Final Results and a Commonly Used Terms and Expressions . Use of results or reports . ( a ) As the national standards laboratory of the United States , NBS establishes and maintains the primary standards from which ...
... Uncertainty of Final Results and a Commonly Used Terms and Expressions . Use of results or reports . ( a ) As the national standards laboratory of the United States , NBS establishes and maintains the primary standards from which ...
Page 2-2
... uncertainty of the reported value at the time of _bration . This uncertainty will vary from 0.0001 percent for Thomas- 1 - ohm standards to 0.002 percent for resistors of nominal value 0.0001 ( b ) Standards of 50 ohms or less of the ...
... uncertainty of the reported value at the time of _bration . This uncertainty will vary from 0.0001 percent for Thomas- 1 - ohm standards to 0.002 percent for resistors of nominal value 0.0001 ( b ) Standards of 50 ohms or less of the ...
Page 2-6
... uncertainty figure given in the report of calibration will vary from .02 to 0.2 percent depending on the nominal value of the inductor and the requency of the test current employed . hould be erminals . ( c ) Usually inductors can be ...
... uncertainty figure given in the report of calibration will vary from .02 to 0.2 percent depending on the nominal value of the inductor and the requency of the test current employed . hould be erminals . ( c ) Usually inductors can be ...
Page 2-7
... uncertainty stated in the report of calibrat determined in part by the accuracy of the Bureau's measurements and i by the characteristics of the capacitor itself , and is sufficiently to allow for variations in the stray capacitance at ...
... uncertainty stated in the report of calibrat determined in part by the accuracy of the Bureau's measurements and i by the characteristics of the capacitor itself , and is sufficiently to allow for variations in the stray capacitance at ...
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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.