ECOTEST MKS-05 TERRA Operating Manual page 31

When the THRESHOLD button is pressed for more than four seconds, the low-order digit
starts blinking, indicating that a new threshold level value can be programmed. A two-tone
audio signal indicates that the programmed DER threshold level has been exceeded.
Note. The DER threshold level value of 0.30 µSv/h is set automatically when the
dosimeter is switched on.
2.3.3.4 Indication of photon-ionizing 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 photon-ionizing radiation DER measurement
(switched on automatically as soon as the dosimeter is on). Photon-ionizing 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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