Title :
High-precision, rapid readout of cryogenic temperature sensors in the Space Shuttle environment
Author_Institution :
NASA/Goddard Space Flight Center, Greenbelt, MD, USA
Abstract :
A compact and rugged system for performing 4-wire determination of the resistance of germanium resistance thermometers near 1 to 1 part in 65000 in 1 s using 20-nW excitation is described. Constraints unique to cryogenic and aerospace, systems are addressed. A microcomputer-controlled, hybrid analog/digital design is presented. Test results are presented, and future developments are discussed
Keywords :
aerospace instrumentation; computerised instrumentation; electric sensing devices; elemental semiconductors; germanium; low-temperature techniques; microcomputer applications; resistance thermometers; Ge; Space Shuttle; aerospace; cryogenic temperature sensors; hybrid analog/digital design; microcomputer-controlled; resistance thermometers; Cryogenics; Extraterrestrial measurements; Germanium; Helium; Kelvin; Space shuttles; Temperature measurement; Temperature sensors; Thermal resistance; Wire;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1989. IMTC-89. Conference Record., 6th IEEE
Conference_Location :
Washington, DC
DOI :
10.1109/IMTC.1989.36812
