Uncertainty Principle

Traceability Chain



NIST detector calibration uncertainty curve

Uncertainty in wavelength range is much higher than VIS range due to the UV light intensity is much smaller than VIS range.


NIST Special Publication 250-41 (2008)


USER Uncertainty curve

*ISO GUM Uncertainty evaluation method

User Uncertainty Budget

Index Type Component of Uncertainty
1 B Uncertainty of the reference detector
2 B Wavelength uncertainty of the monochromator
3 A Reference detector repeatability
4 A Test Measurement repeatability
5 B Test Measurement repeatability
6 B Ambient temperature of detector
7 B Lamp stability
8 B Effect of bandpass of monochromator


User Uncertainty Budget Chart



The following documents are available for download:

  Uncertainty Principle