Special PublicationNational Bureau of Standards, 1968 |
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Page v
... Pressure Measurements 213.211 Pressure measurements Vacuum Measurements 213.221 Vacuum measurements V Vibration Measurements 213.231 Vibration pickups- Humidity Measurements 213.241 Humidity instruments 212.223 Length and diameter ...
... Pressure Measurements 213.211 Pressure measurements Vacuum Measurements 213.221 Vacuum measurements V Vibration Measurements 213.231 Vibration pickups- Humidity Measurements 213.241 Humidity instruments 212.223 Length and diameter ...
Page 1-3
... pressure of 101,325 newtons per square meter . ( c ) Although the six base units , and others derived from th exactly defined , their practical use requires a realization thr development of accurate measurement standards . Measurement ...
... pressure of 101,325 newtons per square meter . ( c ) Although the six base units , and others derived from th exactly defined , their practical use requires a realization thr development of accurate measurement standards . Measurement ...
Page 2-7
... pressure , and frequency deviati a few percent from the stated test conditions . the above fre range , and in the capacitance range from 0.001 pF to 100μ F , the uncer usually lies in the range 0.002 to 0.5 percent . ( d ) When ...
... pressure , and frequency deviati a few percent from the stated test conditions . the above fre range , and in the capacitance range from 0.001 pF to 100μ F , the uncer usually lies in the range 0.002 to 0.5 percent . ( d ) When ...
Page 2-10
... pressure . ) istance determinations made in the laboratory at rated current , refore , may be of little value because the working temperature ditions cannot be duplicated . The best experimental procedure to use in h cases is to place ...
... pressure . ) istance determinations made in the laboratory at rated current , refore , may be of little value because the working temperature ditions cannot be duplicated . The best experimental procedure to use in h cases is to place ...
Page 4-1
... Pressure calibrations are reported in terms of open - circuit voltage per sound pressure applied uniformly to the diaphragm . The open - circuit voltage at the electrical terminals of a microphone depends on the stray capacitance ...
... Pressure calibrations are reported in terms of open - circuit voltage per sound pressure applied uniformly to the diaphragm . The open - circuit voltage at the electrical terminals of a microphone depends on the stray capacitance ...
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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.