Results of the ERDA 2008

Here are the results of our 2008 External Reference Dosimetry Audit (ERDA), performed as MTK ("Messtechnische Kontrolle") by PTW-Freiburg via thermoluminescent dosimeters (TLD):

The largest dose deviation is 1.3%, which is a very good result.

Note in orange the two "inconsistent" calibration factors Nw for the same Roos chamber (S/N 76). It is rather unlikely that due to different electrometer combinations, the calibration factors for the same chamber differ by 1% (1.009 with the webline versus 1.019 with the Unidos). However, this is the official factor and we respect it.

The full report can be downloaded here (2 MB, in German).