Measurement Uncertainty on The Characteristic of Permanent Magnetic Materials by Permagraph Instrument

The prediction on the value of uncertainty on magnetic materials characterizations have been done by using Permagraph Magnet Physik Germany instrument. The magnetic properties that were measured are remanence induction, Br (kG), coercive force of flux density, HcB (kOe), coercive force of polarization, HcJ (kOe), field strength at remanence left, Hknee (kOe), energy product maximum, BHmax (MGOe), field strength at maximum energy product, Ha (kOe), magnetic flux,Ba (kG), maximum field strength, Hmax (kOe). Before determined the uncertainty value of permagraph, it must first determine the uncertainty value of the instrument's digital calipers and analytical balance. The uncertainty method that was used in this observation is statistical method and applies only to a series of observations. Determination of the value of uncertainty by performing repeated measurements at the same sample as much as ten times. This method is based on ISO GUM using the evaluation type A. Uncertainty of the values obtained for digital calipers ±0.0329 cm, analitycal balance ±0.0528 gr, and magnetic characterizations Br ±0.0648 kG, HcB ±0.0632 kOe, HcJ ±0.0628 kOe, Hknee ±0.0643 kOe, BHmax ±0.0631 MGOe, Ha ±0.1213 kOe, Ba ±0.0664 kG, Hmax ±0.0627 kOe.