ECOTEST DKG-21 Operating Manual page 51

Press shortly the THRESHOLD button to switch the alarm clock off. The
"WARNING" transparency should extinct. Memorize the alarm clock
settings by further short pressing of the MODE button. This is evidenced by
a four-time blinking of the dLCD of the dosimeter.
If the alarm is on, the "WARNING" transparency will be displayed on
the dLCD in the mode of indication of the alarm triggering time.
Important! If the process of the alarm clock settings correction is
paused for more than 30 seconds (the user will not press the buttons of the
dosimeter), the dosimeter will automatically return to the mode of the alarm
clock triggering time indication and correction. All changes made will be
canceled.
Note. The alarm clock will continue working even if the dosimeter is
switched off (provided that the storage battery is inserted). The dosimeter
will automatically enter the mode of real time indication when the alarm
clock goes off. Press any control button to switch off audio signal of the
alarm clock. Otherwise, audio signal will be disabled automatically in a
minute after the alarm clock rings.
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