NBS Special Publication, Issue 250U.S. Government Printing Office, 1965 |
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Results 1-5 of 17
Page 27
... diameter not to exceed 1.27 cm ( 1⁄2 in . ) , but in any event cross - sectional area must be not less than 0.2 cm2 ( 0.031 in.2 ) . Item Description Fee 201.401a Determination of data for normal induction curve in the range 0 to 300 Oe ...
... diameter not to exceed 1.27 cm ( 1⁄2 in . ) , but in any event cross - sectional area must be not less than 0.2 cm2 ( 0.031 in.2 ) . Item Description Fee 201.401a Determination of data for normal induction curve in the range 0 to 300 Oe ...
Page 52
... diameter , designated as cobalt blue , copper green , carbon yellow , and selenium orange ( copper green filter also available in 25 mm square size ) ; report includes ( 1 ) values of transmittance at 25 ° C at certain wavelengths from ...
... diameter , designated as cobalt blue , copper green , carbon yellow , and selenium orange ( copper green filter also available in 25 mm square size ) ; report includes ( 1 ) values of transmittance at 25 ° C at certain wavelengths from ...
Page 59
... diameter of the effective aperture . These tests , are primarily of value in determining the accuracy of the geometric f - number markings at maximum aperture and at additional specified apertures . i , j . This test is applied to ...
... diameter of the effective aperture . These tests , are primarily of value in determining the accuracy of the geometric f - number markings at maximum aperture and at additional specified apertures . i , j . This test is applied to ...
Page 63
... diameter with four body drill holes , for no . 8 screws , spaced 90 ° apart on a center circle of 5 % inches in diameter . Item Description Fee 202.207a 202.207b 202.207z Determination of data necessary for plotting one modulation trans ...
... diameter with four body drill holes , for no . 8 screws , spaced 90 ° apart on a center circle of 5 % inches in diameter . Item Description Fee 202.207a 202.207b 202.207z Determination of data necessary for plotting one modulation trans ...
Page 73
... diameter , taper , and roundness to 0.00005 in . for sizes up to and including 4 in . , each . Plain cylindrical plug gages - determination of diameter , taper , and roundness to +0.00001 in . for sizes up to and including 2 in . , each ...
... diameter , taper , and roundness to 0.00005 in . for sizes up to and including 4 in . , each . Plain cylindrical plug gages - determination of diameter , taper , and roundness to +0.00001 in . for sizes up to and including 2 in . , each ...
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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).