Special PublicationNational Bureau of Standards, 1968 |
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Results 1-5 of 45
Page 2-12
... size and coating . Because humidity effects may reach equilibrium only after days ( or even weeks ) , it is recommended that laboratory humidity be held continuously at or below 50 percent . and ( 2 ) Changes in ambient temperature ...
... size and coating . Because humidity effects may reach equilibrium only after days ( or even weeks ) , it is recommended that laboratory humidity be held continuously at or below 50 percent . and ( 2 ) Changes in ambient temperature ...
Page 2-16
... size of the wire of the leads used in the ondary circuit . Alternatively , the burden may be stated in terms of the -- amperes and power factor of the secondary circuit at the test quency . ( 3 ) The test equipment regularly used at the ...
... size of the wire of the leads used in the ondary circuit . Alternatively , the burden may be stated in terms of the -- amperes and power factor of the secondary circuit at the test quency . ( 3 ) The test equipment regularly used at the ...
Page 3-2
... size at one aperture . Fee for each additional ratio . 131f Determination of equivalent focal length , back focal distance nodal point point separation , lens thickness , and resolution at 5 ° intervals from center to edge of field for ...
... size at one aperture . Fee for each additional ratio . 131f Determination of equivalent focal length , back focal distance nodal point point separation , lens thickness , and resolution at 5 ° intervals from center to edge of field for ...
Page 3-14
... sizes from 0.100 in . to and including 1.000 in . , in lots of 10 or more , each . Actual cost of calibration will be charged for smaller lots . Determination of length to ± 0.000004 , ± 0.000005 , and ± 0.000006 in . , respectively ...
... sizes from 0.100 in . to and including 1.000 in . , in lots of 10 or more , each . Actual cost of calibration will be charged for smaller lots . Determination of length to ± 0.000004 , ± 0.000005 , and ± 0.000006 in . , respectively ...
Page 3-19
... size control of critical dimensions are measured in our laboratories as a service to the public . The wide variety of such gages measured includes end standards for length , cylindrical plug and ring gages and balls for diameter , and ...
... size control of critical dimensions are measured in our laboratories as a service to the public . The wide variety of such gages measured includes end standards for length , cylindrical plug and ring gages and balls for diameter , and ...
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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.