NBS Special Publication, Issue 250U.S. Government Printing Office, 1965 |
From inside the book
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Page 17
... for the firs point ( zero calibration ) at the new frequency , and the lower fee applies to additional point at that frequency . 201.105a 201.105b 201.105z Determination of either direct or grounded capacitance 17 Standard capacitors.
... for the firs point ( zero calibration ) at the new frequency , and the lower fee applies to additional point at that frequency . 201.105a 201.105b 201.105z Determination of either direct or grounded capacitance 17 Standard capacitors.
Page 19
... lower rated frequency on one range . Ordinarily , the tests need not be repeated at intervals of less than five years , and then only if the instrument is to be used over the upper part of its frequency range . 201.301 Standard ...
... lower rated frequency on one range . Ordinarily , the tests need not be repeated at intervals of less than five years , and then only if the instrument is to be used over the upper part of its frequency range . 201.301 Standard ...
Page 24
... lower than 0.16 ohm , so that advance arrangements must be made and higher fees must be charged . In planning for the tests of a transformer it is therefore desirable to select a low burden , but one larger than this minimum ...
... lower than 0.16 ohm , so that advance arrangements must be made and higher fees must be charged . In planning for the tests of a transformer it is therefore desirable to select a low burden , but one larger than this minimum ...
Page 18
... lower than the indicated temperature . To use the corrections properly , reference should be made to the notes marked by asterisks on the reverse of this sheet . Estimated uncertainties in the above corrections do not exceed 0.05 ...
... lower than the indicated temperature . To use the corrections properly , reference should be made to the notes marked by asterisks on the reverse of this sheet . Estimated uncertainties in the above corrections do not exceed 0.05 ...
Page 19
... lower ) than stated , all other readings will be higher ( or lower ) by the same amount . NOTE E.- The tabulated corrections apply provided the ice - point reading , taken after exposure for not less than 3 days to a temperature of ...
... lower ) than stated , all other readings will be higher ( or lower ) by the same amount . NOTE E.- The tabulated corrections apply provided the ice - point reading , taken after exposure for not less than 3 days to a temperature of ...
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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).