| Uncertainty Analyzer Four different calibration situations Uncertainty Analyzer, the software developed by Integrated Sciences Group has an opening screen which represents an interesting approach to simplifying the proces of getting started analyzing mesurement uncertainty for the first few times. In the Measurement Configuration screen of the software one is prompted to click on one out of four possible models. The models are labeled MTE, SU, Indirect and General model. When the calibration to be analyzed for uncertainty matches one of the first three models, one can get a better start and proceed directly to entering data to the uncertainty budget. The four models are illustrated using appealing graphics as seen below. After the choice of model the user must further activate check buttons to indicate wheter the measuring parameter is a standard or the subject parameter is a standard. This is to be understood in the sense "passive standard with af fixed value". It is possible for both the measuring and subject parameter to be labeled as standards or none of them having this attribute.
MTE-model |
| MTE is the abbreviation of "Measuring and test equipment". This model should be chosen if one has to do with a simple measuring or calibration task. Exemplified by using the stop watch to measure the time for the hourglass to empty.
SU-model |
| The second model is called the SU model. SU is short for Subject unit. Here the measuring parameter prvides a reference that is measured by the subject unit. The drawing exemplifies this by determination of the error of a balance using a standard weight.
Indirect model |
| The third possible model or configuration is the indirect model. Here both the measuring device (the accurate scale) and the subject device (inaccurate scale) measure a third reference artifact (eg. a weight, the mass of which need not be calibrated).
General model |
| The general model is the correct choice in situations not covered by the three afore mentioned configurations. |
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