Measuring Uncertainty- A New Software Function for Dynamic Display of the Uncertainty of Measurement in Cubis® II Balances
The QApp “Measuring Uncertainty” is a new software function available in the QApp Pharma Package of Sartorius’s Cubis® II premium balances. This QApp function provides a dynamic display of the uncertainty of measurement, based on the EURAMET Calibration Guide No. 18 “Guidelines on the Calibration of Non-Automatic Weighing Instruments”1-3 (denoted as “EURAMET cg-18” in the following).
The attachment to Sartorius’s calibration certificate according to EURAMET cg-18 also shows a determination of weighing uncertainty when the balance is in use. This global expanded software function “measuring uncertainty” is given in the form of a straight-line equation, containing both a constant contribution and a contribution proportional to the reading. In most cases, this represents a sufficiently good estimation of the uncertainty of weighing results of the balance in use.
For the benefit of the user, the software function allows entering the parameters (as shown in the calibration certificate according to EURAMET cg-18) of the straight-line equation directly into the device. Thus the software function always directly specifies the uncertainty for each measured value, as shown in the appendix to the calibration certificate.
