ECOTEST DKG-21 M Operating Manual page 12

3.2.3 Main relative permissible error limit of DER
measurement with 0.95 confidence probability is:
- ±20 % - in the DER range of 1.0 to 10 μSv/h;
- ±15 % - in the DER range of 10 μSv/h to 1.0 Sv/h.
3.2.4 DE measurement range varies from 0.001 to
9999 mSv.
3.2.5 Main relative permissible error limit of DE
measurement with 0.95 confidence probability is
±15 %.
11