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 4
... output to rise from nearly zero to full anode potential . A two - channel electronic timer system was triggered at some predetermine potential level near the midpoint of the linearly risin photocell output curve . During the fall of the ...
... output to rise from nearly zero to full anode potential . A two - channel electronic timer system was triggered at some predetermine potential level near the midpoint of the linearly risin photocell output curve . During the fall of the ...
Page 9
... output of the photo multiplier reached a maximum value in a 10 - μm travel of the silica tube . As the magnification of the viewing FIGURE 8. Optical system with photomultiplier assembly . lens was approximately unity , a slit 10 to 12 ...
... output of the photo multiplier reached a maximum value in a 10 - μm travel of the silica tube . As the magnification of the viewing FIGURE 8. Optical system with photomultiplier assembly . lens was approximately unity , a slit 10 to 12 ...
Page 11
... output from the phototube amplifier was at the potential required to trigger the timing system . A direct current voltmeter with a trimmer was connected in parallel to the output of the amplifier and adjusted so that it indicated full ...
... output from the phototube amplifier was at the potential required to trigger the timing system . A direct current voltmeter with a trimmer was connected in parallel to the output of the amplifier and adjusted so that it indicated full ...
Page 12
... output of the photomultiplier tube amplifier . The zero graduation of the invar scale was centered between the cross - hairs of the filar eyepiece and the filar drum reading recorded to the nearest tenth of a division . The carriage was ...
... output of the photomultiplier tube amplifier . The zero graduation of the invar scale was centered between the cross - hairs of the filar eyepiece and the filar drum reading recorded to the nearest tenth of a division . The carriage was ...
Page 50
... output terminals ( i.e. , replacing them with coaxial type ) . It is not necessary to add the shield in order to calibrate the divider with the method described here . However , it is a convenience in the calibration procedure ...
... output terminals ( i.e. , replacing them with coaxial type ) . It is not necessary to add the shield in order to calibrate the divider with the method described here . However , it is a convenience in the calibration procedure ...
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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
Popular passages
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...