NBS Special Publication, Issue 250U.S. Government Printing Office, 1965 |
From inside the book
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Page 3
... supports , preferably in a single lay Electrical connections to the resistance material should be brazed in all cases in which the to resistance is less than 1,000 ohms . The resistance material should be protected against dation and ...
... supports , preferably in a single lay Electrical connections to the resistance material should be brazed in all cases in which the to resistance is less than 1,000 ohms . The resistance material should be protected against dation and ...
Page 13
... supports , preferably in a single laye Electrical connections to the resistance material should be brazed in all cases in which the tot resistance is less than 1,000 ohms . The resistance material should be protected against ox dation ...
... supports , preferably in a single laye Electrical connections to the resistance material should be brazed in all cases in which the tot resistance is less than 1,000 ohms . The resistance material should be protected against ox dation ...
Page 36
... supported . ( b ) Power measurements are made on barretter - type bolometer units having nominal resistance of 50 , 100 , or 200 ohms at a bias current between 3.5 and 10 mA ; and on thermistor- type bolometer units having a nominal ...
... supported . ( b ) Power measurements are made on barretter - type bolometer units having nominal resistance of 50 , 100 , or 200 ohms at a bias current between 3.5 and 10 mA ; and on thermistor- type bolometer units having a nominal ...
Page 66
... supported throughout at standard tension and at standard temperature , for a tape not exceeding 200 ft or 50 m in length_ _ _ -- This is the regular standard test which will be made and charged for in each To this amount must be added ...
... supported throughout at standard tension and at standard temperature , for a tape not exceeding 200 ft or 50 m in length_ _ _ -- This is the regular standard test which will be made and charged for in each To this amount must be added ...
Page 67
... supported at standard ten- sion and at standard temperature , for a tape not exceeding 200 ft or 50 m in length ...... . ( * ) 202.404j Steel tape - determination of the coefficient of expansion of a tape ; fee will be determined in ...
... supported at standard ten- sion and at standard temperature , for a tape not exceeding 200 ft or 50 m in length ...... . ( * ) 202.404j Steel tape - determination of the coefficient of expansion of a tape ; fee will be determined in ...
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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).