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in calibration, this site aims to make your life much easier! Enjoy the UK's
Independent Calibration Resource
The Metrology Forum..... Offering enlightenment to the uninitiated and soul-food for fellow calibration practitioners.
- NCSL International Is a professional association for individuals engaged in all spheres of international measurement science
Is a utility for use with industrial PT100 resistance thermometers, can use standard or custom coefficients and calculate R to T or T to R. Windows 3.1 or higher.
New - March 2002 V3.2
Initial Win 2000 release
'Type A' entry is no longer required i.e. only Type B uncertainty
components can be computed without any Type A components.
Variances computed as square of Standard Uncertainty rather than
compiled RMS (variance computation change does not effect previously
computed combined Std Uncertainty or Expanded Uncertainty calculations).
Bug fixed with computing negative correlations coefficients (negative
correlations sign was not carried through the calculations such that
negative correlations were calculated as positive correlations).
A new Option (see Option Menu) that normalizes Type A and B Standard
Uncertainty & Variance RMS results to 1 Sigma (1 Std Deviation) - does
not affect Type A and B Combined RMS results.
New Sample Statistic functions that computes Standard Error of the Means
and Coefficient of Variation. On-line manual HELP file appendix omitted
for faster on-line loading. Revision history added to on-line manual.
- Written by: Christopher L. Grachanen of the
COMPAQ COMPUTER CORPORATION, CORPORATE METROLOGY DEPT.
The "Uncertainty Calculator" is a "FREEWARE" software program designed to
compute and express measurement uncertainty in a simple, straightforward
manner, congruent with the basic guidelines contained within the following
- ISO "Guide to the Expression of Uncertainty in Measurement", 1993
- NIST Technical Note 1297, "Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results", January 1993
- NCSL Recommended Practice RP-12, "Determining and Reporting Measurement Uncertainties", April 1995
- ANSI/NCSL Z540-2-1996, "American National Standard for Expressing Uncertainty - U.S. Guide to the Expression of Uncertainty in Measurement"