ECOTEST DKG-21 M Operating Manual page 64

maximum permissible error. Hence, the measurement
result can be used only for rough evaluation of DER. The
steady point informs that the statistical error of the DER
measurement result is within the permissible range.
The main direction of the dosimeter when DER is
measured is the direction perpendicular to the front (rear)
panel of the dosimeter.
DER measurement result is considered to be the
arithmetic mean of five last measurements in 8 min after
the intensity of radiation is changed at DER levels in the
range of 1.0 to 10.0 µSv/h, or within 2 min to 2 s for
levels in the range of 10.0 µSv/h to 1.0 Sv/h.
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