Figure 6
Measurements resolution and comparison with real error. A) Relative resolutions for thickness, area density, and bulk density measurements using the ashmeter as a function of the thickness compared to a conventional tape ruler. The relative resolutions have been calculated for an ashmeter model 1.5 (6-liter large bottle and 1.5-liter small bottle); B) Difference between theoretical resolutions and real error for 64 thickness measurements using 4 inner gauges (#24A, #80B, #83B, and #88B) as a function of the thickness. The dashed black arrows show the 9 measurements where the real error is higher than the theoretical resolution.