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After the last digit is set and at next pressing of the
MODE button, the LCD will blink four times, indicating
that the value of threshold level has been fixed. The
dosimeter will return to the mode of DER measurement.
The threshold level is stored in the nonvolatile
memory of the dosimeter. Switching on and off and
replacing the dosimeter's battery does not change the
threshold level.
Press the THRESHOLD button and hold it pressed
not more than 2 s after a new threshold level value
appears to check the value of the DER threshold level.
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