ECOTEST MKS-05 TERRA-P+ Operating Manual page 37

Note. The DER threshold level value of 0.30 µSv/h is set automatically when the
dosimeter is switched on.
6.3.4 Indication of gamma radiation DE measurement value
Press shortly the MODE button to switch on the mode of DE measurement value
indication. This mode follows the mode of gamma radiation DER measurement
(switched on automatically as soon as the dosimeter is on). Gamma radiation DE
measurement starts right after the dosimeter is switched on, and is performed in all
operating modes, except for surface beta-particles flux density measurement.
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