ECOTEST DKG-21 Operating Manual page 9

3.2.9 Time of operating mode setting at DER measurement, not more
than:
-6
- from 1∙10
-6
- from 5∙10 Sv/h to 2∙10
-5
- from 2∙10 Sv/h to 1.0 Sv/h, maximum 3 min.
3.2.10 Time of DER measurement, not more than:
- 10 s – in the DER range of 1.0 μSv/h to 10.0 μSv/h;
- 5 s – in the DER range of 10.0 μSv/h to 1.0 Sv/h.
3.2.11 Minimum DE measurement time expressed in seconds should
not exceed the value calculated by the formula:
H 
( 10
where
p
-6
Sv/h to 5∙10 Sv/h (inclusive), maximum 30 minutes;
-5
Sv/h (inclusive), maximum 5 minutes;
7200
=
t

H ( 10 )
p
- a numeric value of DER in µSv/h.
)
,
7
(1.1)