ECOTEST DKG-21 M Operating Manual page 65

Measurement intervals and subranges will be set
automatically according to the intensity of registered
radiation.
Note. The process of data averaging can be stopped
forcedly for quick evaluation of DER. To do this, press
and hold down the THRESHOLD button until "Clr"
symbols appear on the LCD. Release THRESHOLD as
soon as symbols are displayed. Rough evaluation of
DER value will be displayed within 1 min.
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