ECOTEST TERRA-P MKS-05 Operating Manual page 17

2.2 Threshold level values of gamma radiation DER in the range of 0.01 to
9.99 μSv/h with discreetness of 0.01 μSv/h are programmed in the dosimeter.
Threshold level value is set automatically after the dosimeter is switched on and
equals 0.30 µSv/h. It corresponds to the maximum permissible level of gamma
background for premises in compliance with the regulatory documents of Ukraine.
2.3 The dosimeter sends audio signals of different periodicity and keys if the
programmed DER level is exceeded, the alarm clock goes off, or the battery is
discharged.
2.4 The dosimeter provides four level indication of battery discharge.
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