NBS Special Publication, Issue 250U.S. Government Printing Office, 1965 |
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Page 3
... ohms . The resistance material should be protected against dation and other chemical action and should be annealed or aged by baking after winding . ( c ) Precision standard resistors should be so adjusted as to give an accuracy of at ...
... ohms . The resistance material should be protected against dation and other chemical action and should be annealed or aged by baking after winding . ( c ) Precision standard resistors should be so adjusted as to give an accuracy of at ...
Page 4
... ohm to 10 ohms ( except Thomas type ) .. ( * ) 201.101a - 3 Four - terminal measurements , Thomas - type 1 - ohm and standards 0.001 ohm and less .. ( * ) Determination of resistance in oil bath at 25 ° C . For odd - valued standards ...
... ohm to 10 ohms ( except Thomas type ) .. ( * ) 201.101a - 3 Four - terminal measurements , Thomas - type 1 - ohm and standards 0.001 ohm and less .. ( * ) Determination of resistance in oil bath at 25 ° C . For odd - valued standards ...
Page 5
201.102a Precision decade and plug boxes . For decades not exceeding 10,000 ohms per step . ( 1 ) First point in each box .. ( * ) ( 2 ) Each additional point in same resistance box . ( * ) 201.102b Megohm box , 10 sections each 100,000 ...
201.102a Precision decade and plug boxes . For decades not exceeding 10,000 ohms per step . ( 1 ) First point in each box .. ( * ) ( 2 ) Each additional point in same resistance box . ( * ) 201.102b Megohm box , 10 sections each 100,000 ...
Page 13
... ohms . The resistance material should be protected against ox dation and other chemical action and should be annealed or aged by baking after winding . ( c ) Precision standard resistors should be so adjusted as to give an accuracy of ...
... ohms . The resistance material should be protected against ox dation and other chemical action and should be annealed or aged by baking after winding . ( c ) Precision standard resistors should be so adjusted as to give an accuracy of ...
Page 14
... ohm to 10 ohms ( except Thomas type ) ___ ( * ) 201.101a - 3 Four - terminal measurements , Thomas - type 1 - ohm and standards 0.001 ohm and less_ ( * ) Determination of resistance in oil bath at 25 ° C . For odd - valued standards not ...
... ohm to 10 ohms ( except Thomas type ) ___ ( * ) 201.101a - 3 Four - terminal measurements , Thomas - type 1 - ohm and standards 0.001 ohm and less_ ( * ) Determination of resistance in oil bath at 25 ° C . For odd - valued standards not ...
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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).