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Isothermal CalorimeterPressure-feedback signal indicates rate of heating. Improved isothermal calorimeter measures rate of heating in object under test. Called "isothermal" because chamber holding object and its environment maintained at or near constant temperature to minimize spurious tranfers of heat introducing errors into measurements. When item under test generates heat, rate of boiling and pressure in inner chamber increase. Servo-valve opens wider to maintain preset differential pressure. Valve-control voltage used as measure of rate of heating.
Document ID
19900000402
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Rowlette, John J.
(Caltech)
Date Acquired
August 14, 2013
Publication Date
August 1, 1990
Publication Information
Publication: NASA Tech Briefs
Volume: 14
Issue: 8
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
NPO-17419
Accession Number
90B10402
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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