An intercept table of Uncertainties is used to determine the measure of uncertainty for the analysis result. The values are shown throughout the system as +/- value after a result
Using the coarse example above, a pH result of 6.3 is reported as 6.3 +/- 0.25. Or from another example:
Calculate Precision from Uncertainties
If enabled, Bika calculates the precision required and round the results according to the uncertainties.
The rounding applies both for decimal results and results with scientific notation
The decimal position is given by the first number different from zero in the uncertainty, at that position the system will round up the uncertainty and results
For example
a result of 5.243 and uncertainty of 0.22, the system displays as 5.2 +- 0.2
13.5 and uncertainty 1.34, the system displays 13 +- 1
If the Integer digits in the result > 4, the number is formatted in scientific notation
If it is < 4, it is formatted as decimal notation, rounded in accordance to the precision calculated from the uncertainty
Disabled
If the Calculate precision from Uncertainties is disabled for the Analysis Service, the same rules described above applies, but the precision used for rounding the result is not calculated from the uncertainty
The fixed length precision is used instead
Manual Uncertainty input
Enabling this option, will allow Analysts to manually override system calculated defaults manually, often the case in more complex Analyses