A calibration model for screen-caged Peltier thermocouple psychrometers

Ray W. Brown; Dale L. Bartos

doi:10.2737/INT-RP-293

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A calibration model for screen-caged Peltier thermocouple psychrometers

Informally Refereed

Authors:

Ray W. Brown, Dale L. Bartos

Year:

1982

Type:

Research Paper

Station:

Rocky Mountain Research Station

DOI:

https://doi.org/10.2737/INT-RP-293

Source:

Res. Pap. INT-293. Ogden, UT: US. Department of Agriculture, Forest Service, Intermountain Forest and Range Experimental Station. 155 p.

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Abstract

A calibration model for screen-caged Peltier thermocouple psychrometers was developed that applies to a water potential range of 0 to-80 bars, over a temperature range of 0° to 40° C, and for cooling times of 15 to 60 seconds. In addition, the model corrects for the effects of temperature gradients over zero-offsets from -60 to + 60 microvolts. Complete details of model development are discussed, together with the theory of thermocouple psychrometers, and techniques of calibration and cleaning. Also, information for computer programing and tabular summaries of model characteristics are provided.

Keywords

thermocouple psychrometers, calibration, modeling, water potential, temperature gradient effects, Peltier cooling, screen-caged psychrometers, psychrometer calibration model

Citation

Brown, Ray W.; Bartos, Dale L. 1982. A calibration model for screen-caged Peltier thermocouple psychrometers. Res. Pap. INT-293. Ogden, UT: US. Department of Agriculture, Forest Service, Intermountain Forest and Range Experimental Station. 155 p.