ECOTEST STORA-ABG RKS-01 Operating Manual page 73

The display of "γ" symbol indicates that the measurement result consists of beta
and gamma-components of radiation at the same time. That is, the effect of γ-
component of radiation is not considered. The alpha, beta, gamma radiation counter
window should be closed with Cover No.3 (alpha filter), which closes the counter
from alpha radiation and admits beta and gamma radiation.
2.3.3.7.3 To measure characteristics of beta radiation individually, it is
necessary to measure and save the value of gamma radiation component in the
immediate vicinity to the surface to be examined. In the future, this value will be
automatically considered when measuring beta radiation characteristics. When
measuring gamma radiation component, the window of the alpha, beta, gamma
counter should be closed with Cover No.2 (alpha, beta filter), which closes the
counter from alpha and beta radiation but slightly attenuates gamma radiation.
2.3.3.7.4 Measurement of gamma radiation component must be performed with
sufficient accuracy.
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