Special PublicationNational Bureau of Standards, 1968 |
From inside the book
Results 1-5 of 100
Page 1-10
... range of low - frequency calibrations are needed , the instrument hould be sent to : National Bureau of Standards Route 70S and Quince Orchard Road . Gaithersburg , Maryland 20760 ( 2 ) Calibrations listed in MP 250 250 other than those ...
... range of low - frequency calibrations are needed , the instrument hould be sent to : National Bureau of Standards Route 70S and Quince Orchard Road . Gaithersburg , Maryland 20760 ( 2 ) Calibrations listed in MP 250 250 other than those ...
Page 2-1
... range - extending auxiliaries used with di current or alternating current at frequencies up to 30 kHz ( with cer exceptions ) . Electrical standards and apparatus submitted to the Bureau calibration should be in good working order with ...
... range - extending auxiliaries used with di current or alternating current at frequencies up to 30 kHz ( with cer exceptions ) . Electrical standards and apparatus submitted to the Bureau calibration should be in good working order with ...
Page 2-3
... 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 : Two - terminal measurements : 211.011a ( 1 ) 211.011b 211.011c ( 2 ) Standards suitable ...
... 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 : Two - terminal measurements : 211.011a ( 1 ) 211.011b 211.011c ( 2 ) Standards suitable ...
Page 2-4
... range Kelvin double bridge asurements ) are calibrated as precision Wheatstone bridges . The method operation pertinent to these ratio sets is such that the user does not dinarily need calibrated values for the inner ratio arms . The ...
... range Kelvin double bridge asurements ) are calibrated as precision Wheatstone bridges . The method operation pertinent to these ratio sets is such that the user does not dinarily need calibrated values for the inner ratio arms . The ...
Page 2-5
... range 106 to 1012 ohms ; for higher - valued resistors the accuracy percent . In order that the reported results be of significanc necessary that standards submitted for tests be made of suitable ma processed in such a manner that ...
... range 106 to 1012 ohms ; for higher - valued resistors the accuracy percent . In order that the reported results be of significanc necessary that standards submitted for tests be made of suitable ma processed in such a manner that ...
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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.