Evaluation of uncertainties in voltage display errors of battery discharge system
Ning Xu · Chinese Battery Industry · 2007
The procedure for evaluating the uncertainty in the calibration of errors in the voltage display of the DM-2000 Automatic Battery Discharge Testing System using a DF-930F+ digital multimeter was introduced. Four independent sources of errors, including the standard deviation of repeated measures by the DM-2000 System using randomly selected resistance loads, the uncertainties in the reading divisions of the DM-2000 System, the factory-rated accuracy of the DF-930F+ multimeter, and the factory-rated measurement resolution of the DF-930F+ multimeter in the corresponding voltage range, are used to calculate the overall standard uncertainty of the calibration. This uncertainty results can be used directly as the general uncertainty of battery voltage tests.