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 38
... detector are used to measure the emfs erated by the thermocouples . The saturator asse is maintained in a horizontal orientation . The saturator tube is constructed with a va I jacket to reduce heat transfer between its in and its ...
... detector are used to measure the emfs erated by the thermocouples . The saturator asse is maintained in a horizontal orientation . The saturator tube is constructed with a va I jacket to reduce heat transfer between its in and its ...
Page 50
... detection . OUTPUT COMMON COPPER SHIELD FIGURE 1. Typical " four - terminal " divider circuit ( shown with copper shield added by NBS ) . CC CC D1 CC CC Dz d + 1 VR S T2 T3 CC CC CC NULL DETECTOR D3 FIGURE 2. Schematic circuit diagram ...
... detection . OUTPUT COMMON COPPER SHIELD FIGURE 1. Typical " four - terminal " divider circuit ( shown with copper shield added by NBS ) . CC CC D1 CC CC Dz d + 1 VR S T2 T3 CC CC CC NULL DETECTOR D3 FIGURE 2. Schematic circuit diagram ...
Page 51
... detector circuit consists of a tuned null - indicator and a specially constructed shielded transformer , T3 , to match the impedance and to isolate the detector from the measuring circuit . Transformer , T4 , is also specially ...
... detector circuit consists of a tuned null - indicator and a specially constructed shielded transformer , T3 , to match the impedance and to isolate the detector from the measuring circuit . Transformer , T4 , is also specially ...
Page 55
... detector circuit consists of a preamplifier and a cathode - ray oscillograph . A narrow band - pass filter is used ... detection transformers " T2 " and " T3 " . * ppm - in ( parts - per - million of input or unity ) . CORE PRIMARY ...
... detector circuit consists of a preamplifier and a cathode - ray oscillograph . A narrow band - pass filter is used ... detection transformers " T2 " and " T3 " . * ppm - in ( parts - per - million of input or unity ) . CORE PRIMARY ...
Page 57
... detector nor a quadrature voltage is used to balance the voltage between guard circuit 1 and the center conductor , a small leakage current exists . These errors are estimated to be about 0.08 ppm - in for in - phase and 0.10 ppm - in ...
... detector nor a quadrature voltage is used to balance the voltage between guard circuit 1 and the center conductor , a small leakage current exists . These errors are estimated to be about 0.08 ppm - in for in - phase and 0.10 ppm - in ...
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Common terms and phrases
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...