NBS Special Publication, Issue 250U.S. Government Printing Office, 1965 |
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... approximately 150 selected papers previously published by the staff of the National Bureau of Standards . Issued 1961 ; available from the Superintendent of Documents , U.S. Government Printing Office , Washington , D.C. , 20402 . Vol ...
... approximately 150 selected papers previously published by the staff of the National Bureau of Standards . Issued 1961 ; available from the Superintendent of Documents , U.S. Government Printing Office , Washington , D.C. , 20402 . Vol ...
Page 21
... approximately with the square of the applied voltage , and ( 4 ) be entirely negligible at 20 percent of rated voltage on all ranges . ( d ) Suggested test schedule : ( 1 ) Volt boxes should be tested at rated voltage . The first ...
... approximately with the square of the applied voltage , and ( 4 ) be entirely negligible at 20 percent of rated voltage on all ranges . ( d ) Suggested test schedule : ( 1 ) Volt boxes should be tested at rated voltage . The first ...
Page 23
... approximately 100 sec duration . The meters are energized for at least 30 min at rated voltage and current on one range before starting the test . Item Description Fee 201.305a Test at 60 Hz on one combination of range , applied voltage ...
... approximately 100 sec duration . The meters are energized for at least 30 min at rated voltage and current on one range before starting the test . Item Description Fee 201.305a Test at 60 Hz on one combination of range , applied voltage ...
Page 30
... approximately 20 , 40 , 60 , 80 , and 100 kV . See 201.610z below . ] Item Description Fee 201.601a 201.601b 201.601z NOTE : Calibration of an inductive voltage divider under schedule 201.601b is generally sufficient to establish its ...
... approximately 20 , 40 , 60 , 80 , and 100 kV . See 201.610z below . ] Item Description Fee 201.601a 201.601b 201.601z NOTE : Calibration of an inductive voltage divider under schedule 201.601b is generally sufficient to establish its ...
Page 32
... approximately unity power factor to be specified by the user ; primary voltage not to exceed 25,000 V. Fee ( * ) 201.602a - 2 As in a - 1 except primary voltage greater than 25,000 V but not to exceed 100,000 V. ( * ) 201.602a - 3 ...
... approximately unity power factor to be specified by the user ; primary voltage not to exceed 25,000 V. Fee ( * ) 201.602a - 2 As in a - 1 except primary voltage greater than 25,000 V but not to exceed 100,000 V. ( * ) 201.602a - 3 ...
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Common terms and phrases
Ac-dc accepted for calibration accuracy additional American Standards Association API Standard apparatus Appendix attenuators bolometer bolometer units bulb and liquid Bureau of Standards calibration or test changes in emf charged dependent color temperature condenser microphones current fees decibels Determination diameter Electric electrode electromotive force end of table errors exceeding footnote at end frequency Gage blocks gages-determination glass Group of Standard higher or lower hygrometers ice-point reading indications inductors instruments Invar Item Description Fee laboratory length liquid column mass measurements meter National Reference Group ohms perature phase angle plug Precision pressure Radium ratio reference standards REPORT OF CALIBRATION resistance thermometer resistors ring gages sample saturated standard cells schedule special tests specifications spectrophotometer stability standard resistors submitted for calibration tabulated corrections apply temperature range test points test_ tests not covered thermal conductivity thermocouple thermometer was tested U.S. DEPARTMENT uncertainty voltage dividers waveguide weights
Popular passages
Page 11 - Standard Reference Materials issued by the National Bureau of Standards to calibrate a measurement system, or to produce scientific data that can be referred to a common base. A schedule of prices and amounts, as well as directions for ordering, is included.
Page 49 - ... index markers. Since it is necessary to determine the shift of the principal point resulting from prism effect in the lens, the equivalent focal length of the lens as mounted In the camera is incidentally determined...
Page 55 - ... wire loops, spring balances, tension handles, or other attachments liable to be detached or changed in shape. The error in the total length of the tape, when supported horizontally throughout its length at the standard temperature of 68° F. (20° C.) and at standard tension, shall not be more than 0.1 inch per 100 feet (2 mm per 25 m).