Evaluation of an automatic aerosol particle counter for measuring the airborne contamination level in a controlled environment
Automatic aerosol particle counter for measuring airborne contamination level in controlled environment
SEARCH · Search NASA
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Automatic aerosol particle counter for measuring airborne contamination level in controlled environment
Design and analysis of automatic balancing system for three-axis air bearing table
Transportable real time automatic digital optical satellite tracking system
Overlay copy technique to provide high-contrast electron micrographs for automatically determining quantitative microstructure of multiphase specimens
Automatic microwave polarization analyzer which permits instant and continuous measurement of incident wave
FM telemetry digitizing system operating on-line in real time environment results in automatic data processing
Automatic battery formation system for silver- cadmium electrochemical cells
Salient hardware, software, and operational features of machine for automatic graphics interface to computer /MAGIC/ operating display system
Electro-optical automatic celestial guidance system for spacecraft and satellites
Sensitivity and tracking capabilities of precision laser automatic tracking system
Automatic cloud cover picture interpretation
Automatic channel switching device operates with all three triple modular redundant channels when there are no errors. When a failure occurs, channel and module switching isolate the failure to a specific channel. Since only one must operate correctly, reliability is increased.
Insulation tester checks multiple-strand electrical cables in nuclear rocket reactors. It has both manual and automatic capabilities and can check the insulation of a cable with 200 or more conductors in a few minutes.
Device automatically bench tests paper tape punches and readers in a simulated operating environment following routine maintenance. The reader and punch operate back-to-back and the paper tape output feeds the reader. The tape leader is prepunched with an arbitrary pattern that is continuously reproduced during the check.
Automatic line-reversal pyrometer measures gas temperatures from 2900 degrees to 4500 degrees R. The self-balancing device uses the sodium D-line but replaces the two conventional manual operations of the line-reversal method and can be used by semiskilled personnel.
Portable weld tool makes weld repairs out-of-station and on the side opposite the original weld. It provides full automatic control of the arc voltage, current, wire feed, and electrode travel speed in all welding attitudes. The device is readily adaptable to commercially available straight polarity dc weld packs.
SiC/Si diode pair provides automatic range change to extend the operating range of a logarithmic amplifier-conversion circuit and assures stability at or near the range switch-over point. the diode provides hysteresis for a trigger circuit that actuates a relay at the desired range extension point.
SATURN S-2 Automatic Software System /SASS/ was designed and implemented to aid SATURN S-2 program development and to increase the overall operating efficiency within the S-2 data laboratory. This program is written in FORTRAN 2 for SDS 920 computers.