Thunder's Reference Library
This is where you can view Technical Notes and Papers regarding humidity generation and measurement.
Solving Humidity Calibration Challenges In Today's Metrology Lab
This paper was presented by Mr. Jeff Bennewitz in the Humidity Session at the NCSL 2003 International Workshop & Symposium, in Tampa Florida.
NCSL published a Recommended Standard on the two-pressure, two-temperature humidity Generator
This document describes a Recommended Practice for Intrinsic/Derived Standards (RISP-5) on the two-pressure, two-temperature humidity generator.
Model 1200 Uncertainty Analysis
This document describes a complete uncertainty analysis of the Model 1200 in accordance with NIST Technical Note 1297. Each error source is identified, quantified, and combined to form an expanded uncertainty with a coverage factor of 2.
Model 2500 Uncertainty Analysis
The following documents present a complete uncertainty analysis of the Model 2500 in accordance with NIST Technical Note 1297. Each error source is identified, quantified, and combined to form an expanded uncertainty with a coverage factor of 2.
Model 3900 Uncertainty Analysis
Described in this document is the Dew Point and Frost Point Uncertainty Analysis, following NIST Guideline 1297, for a Model 3900 Humidity Generator.
New ITS-90 formulas have been developed for vapor pressure, dew/frost point temperatures, and enhancement factors. These formulas are published in the proceedings of the Third International Symposium on Humidity and Moisture, was held in April 1998 at the National Physical Laboratory in the United Kingdom. The vapor pressure and enhancement formulas were developed by conversion of internationally recognized IPTS-68 equations to the ITS-90 temperature data. Formulas for dew and frost point temperatures were then developed to allow easy transition between vapor pressure and the corresponding temperature. All of the formulas mentioned are contained within the following document.
Basic Humidity Definitions
The materials for a Workshop given at the 2000 NCSL Conference are available here for on-line viewing.
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