ECOTEST DKG-21 Operating Manual page 25

dLCD is a sign-character liquid crystal display with LED illumination,
and is used to visualize measurement results in different modes of operation
of the dosimeter.
3.4.3.2 The dosimeter operates as follows.
If switched off, the dosimeter's circuit is in a micro-consuming mode
of operation (µA units), the circuit is powered from LVS. In this state the
processor supports only the process of real-time countdown.
Press briefly the MODE button and the processor switches to the active
state, switches on the VSC and issues signals of control to the AVF, which
starts forming the anode voltage for operation of the Geiger-Muller
counter. At the same time the processor is switched on to the priority mode
of DER measurement, as evidenced by the symbol of dimension "μSv/h"
on the dLCD. By assessing the intensity of the pulse flow from the Geiger-
Muller counter, the processor automatically sets the interval and the
measurement subrange.
23