NBS Special Publication, Issue 250U.S. Government Printing Office, 1965 |
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Page
... changes in calibration or standard materials services ; lists publications and patents by NBS staff members ; summarizes scientific meetings involv- ing the Bureau ; carries announcements of national and international significance in ...
... changes in calibration or standard materials services ; lists publications and patents by NBS staff members ; summarizes scientific meetings involv- ing the Bureau ; carries announcements of national and international significance in ...
Page
... changes in fee schedules , please fill out and mail the post card inserted on last page . ( If you sent the post card accompanying the 1963 edition of this publication , you are already on the mailing list and need not send another ...
... changes in fee schedules , please fill out and mail the post card inserted on last page . ( If you sent the post card accompanying the 1963 edition of this publication , you are already on the mailing list and need not send another ...
Page 2
... temperature coefficient , should not change its resistance appreciably with time , and for low - valued coils should have a small thermoelectric power against copper . ( b ) All wire standard resistors and the more High - Frequency Region.
... temperature coefficient , should not change its resistance appreciably with time , and for low - valued coils should have a small thermoelectric power against copper . ( b ) All wire standard resistors and the more High - Frequency Region.
Page 3
... changes in resistance take place in new apparatus , i not advisable to calibrate new or repaired apparatus until at least two months after the sistors have been annealed and adjusted . Precision apparatus known to be new will be b in ...
... changes in resistance take place in new apparatus , i not advisable to calibrate new or repaired apparatus until at least two months after the sistors have been annealed and adjusted . Precision apparatus known to be new will be b in ...
Page 4
... changes in resistance resulting from necessary variations of the temperature from 25 ° C are of importance : Two - terminal measurements . Four - terminal measurements .. For special tests not covered by the above schedule , advance ...
... changes in resistance resulting from necessary variations of the temperature from 25 ° C are of importance : Two - terminal measurements . Four - terminal measurements .. For special tests not covered by the above schedule , advance ...
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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).