NBS Special Publication, Issue 250U.S. Government Printing Office, 1965 |
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Page
... percent relative humidity ( + 2 % ) at a temperature of 23 ° C ( + 2 ° ) . Previously the calibrations were performed at 50 percent relative humidity at a temperature of 23 ° C . This environment does not apply to saturated standard ...
... percent relative humidity ( + 2 % ) at a temperature of 23 ° C ( + 2 ° ) . Previously the calibrations were performed at 50 percent relative humidity at a temperature of 23 ° C . This environment does not apply to saturated standard ...
Page 3
... percent without corrections . Precision resistance apparatus should be adjusted wit 0.05 percent of nominal value . ( d ) Because comparatively rapid changes in resistance take place in new apparatus , i not advisable to calibrate new ...
... percent without corrections . Precision resistance apparatus should be adjusted wit 0.05 percent of nominal value . ( d ) Because comparatively rapid changes in resistance take place in new apparatus , i not advisable to calibrate new ...
Page 4
... percent of a nominal value which is itself a decimal multiple ( or submultiple ) of 1 ohm : Two - terminal measurements . 201.101a - 1 ( * ) 201.101a - 2 Four - terminal measurements 0.01 ohm to 10 ohms ( except Thomas type ) ...
... percent of a nominal value which is itself a decimal multiple ( or submultiple ) of 1 ohm : Two - terminal measurements . 201.101a - 1 ( * ) 201.101a - 2 Four - terminal measurements 0.01 ohm to 10 ohms ( except Thomas type ) ...
Page 10
... percent relative humidity ( + 2 % ) at a temperature of 23 ° C ( + 2 ° ) . Previously the calibrations were performed at 50 percent relative humidity at a temperature of 23 ° C . This environment does not apply to saturated standard ...
... percent relative humidity ( + 2 % ) at a temperature of 23 ° C ( + 2 ° ) . Previously the calibrations were performed at 50 percent relative humidity at a temperature of 23 ° C . This environment does not apply to saturated standard ...
Page 13
... percent without corrections . Precision resistance apparatus should be adjusted with 0.05 percent of nominal value . ( d ) Because comparatively rapid changes in resistance take place in new apparatus , it not advisable to calibrate new ...
... percent without corrections . Precision resistance apparatus should be adjusted with 0.05 percent of nominal value . ( d ) Because comparatively rapid changes in resistance take place in new apparatus , it not advisable to calibrate new ...
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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).