ECOTEST STORA-ABG RKS-01 Operating Manual page 53

2.3.3.6.3. Choose "γ" as the type of radiation. After turning on, the radiometer
begins to measure characteristics of this radiation. If another radiation type is
chosen during operation of the radiometer, you can switch to measurement of
photon-ionizing radiation characteristics by briefly pressing γ/β/α button.
2.3.3.6.4. The radiometer can measure photon-ionizing radiation DER expressed
in μSv/h, mSv/h (selection of measurement units takes place automatically
depending on the intensity of radiation), or the pulse count rate from the alpha, beta,
gamma counter expressed in in cps. Switching between DER measurement and the
pulse count rate is done by shortly pressing MODE and THRESHOLD buttons
simultaneously.
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