Journal of Research of the National Bureau of Standards: Engineering and instrumentation. C, Volumes 72-75U.S. Government Printing Office, 1968 |
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Page 49
... input for deviations less than 10 ppm of input and within 1 × 10-6 for deviations up to 100 ppm of input . This same calibration technique can readily be used to cover a frequency range from 1 to 20 kHz . Key Words : Calibration , in ...
... input for deviations less than 10 ppm of input and within 1 × 10-6 for deviations up to 100 ppm of input . This same calibration technique can readily be used to cover a frequency range from 1 to 20 kHz . Key Words : Calibration , in ...
Page 50
... input " terminal.2 The maximum measured voltage difference acr + jẞ " Tr ( fig . 3 ) is reduced by addition of the shielding to the connecting wire from about 5 × 10-7 to less than 3 × 10-8 of the input voltage . Further reduction can ...
... input " terminal.2 The maximum measured voltage difference acr + jẞ " Tr ( fig . 3 ) is reduced by addition of the shielding to the connecting wire from about 5 × 10-7 to less than 3 × 10-8 of the input voltage . Further reduction can ...
Page 51
... INPUT D1 -a2xx + iß " x 30 —— v + as + jß s 20 حمم لم D2 * REFERENCE COMMON CASE % + O COMMON alex + 18 → fcx 00 FIGURE 3. Circuit for self “ boot - straping " calibration . ' Figures in brackets indicate the literature references at ...
... INPUT D1 -a2xx + iß " x 30 —— v + as + jß s 20 حمم لم D2 * REFERENCE COMMON CASE % + O COMMON alex + 18 → fcx 00 FIGURE 3. Circuit for self “ boot - straping " calibration . ' Figures in brackets indicate the literature references at ...
Page 52
... input terminal voltage , Vin , which can be expressed as Vout = d + a + jb Vin where d is the nominal ratio or setting of the dials , a is the in - phase deviation , and b is the quadra- ture deviation . Both deviations are expressed as ...
... input terminal voltage , Vin , which can be expressed as Vout = d + a + jb Vin where d is the nominal ratio or setting of the dials , a is the in - phase deviation , and b is the quadra- ture deviation . Both deviations are expressed as ...
Page 53
... input basis . Vc / Vin and VR / Vin may be 1 1 S expressed as ( de - 0.5 ) and ( dR - 0.5 ) , respectively , where do and dr are dial settings of S divider D3 and s represents the voltage ratio of T4 . ( The necessity for subtracting ...
... input basis . Vc / Vin and VR / Vin may be 1 1 S expressed as ( de - 0.5 ) and ( dR - 0.5 ) , respectively , where do and dr are dial settings of S divider D3 and s represents the voltage ratio of T4 . ( The necessity for subtracting ...
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accuracy admittance alloys analysis application approximately atomic attenuation bolometer Bolovac bridge Bureau of Standards calculated calibration calorimeter capacitance capacitor Chem circuit coaxial coefficient connectors constant creep Cryogenic crystal curves density described detector determined dew point disk effect electrical electron electron probe microanalysis energy equation error evaluation experimental field film flow frequency function heat hydrometer IEEE impedance input Instr Instrumentation Vol Key words laser linear liquid load magnetic materials measurements ment meter method microwave Mössbauer effect Mössbauer spectroscopy National Bureau obtained optical oscilloscope output paper parameters percent Phys precision pressure Proc properties pulse radiation range ratio reference resistance resistors resonance sample shown in figure solution specimen spectra stress surface Tech techniques temperature thermal thermal conductivity thermocouple thermodynamic thiosulfate tion Trans tube tungsten uncertainty values vapor voltage waveguide wet-bulb wet-bulb temperature wire x-ray
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Page 28 - In no case does such identification imply recommendation or endorsement by the National Bureau of Standards, nor does it imply that the material or equipment identified is necessarily the best available for the purpose.
Page 46 - THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the United States of a complete and consistent system of physical measurement; coordinates...
Page 25 - Passenger comfort is one of the most important factors to be considered in the design of these facilities and this also applies to the waiting rooms, rest rooms, lunch and dining rooms.
Page 21 - ... (1) nuclear data, (2) atomic and molecular data, (3) solid state data, (4) thermodynamic and transport data, (5) chemical kinetics, (6) colloid and surface properties, and (7) mechanical properties.
Page 82 - These include the development and maintenance of the national standards of measurement and the provision of means and methods for making measurements consistent with these standards...
Page 23 - The procedure uses the x and y coordinates and the individual directions of the minutiae ( ridge endings and bifurcations). The identity of the...
Page 22 - This publication contains a descriptive listing, item by item, of most of the test and calibration work done at the National Bureau of Standards with the respective fees.
Page 16 - Maryland, and by the Division of Biology and Medicine of the United States Atomic...