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2.3.3.7 The mode surface beta-particles flux density measurement
This mode can be entered from any other operating mode of the radiometer
with the help of a short press of the MODE button. This mode follows the mode of
photon-ionizing radiation DER measurement.
At first measure gamma background DER (to enable its further automatic
subtraction), and then measure surface beta-particles flux density. To do this, place the
radiometer in the mode of DER measurement (beta-filter cover covers the detector of
gamma and beta radiation) over the surface that should be examined for beta-particles
flux density, and wait for the measurement result of gamma background DER with the
required statistical error. Press shortly the MODE button. This will store the measured
value of gamma background DER and switch the radiometer from photon-ionizing
radiation DER measurement mode to surface beta-particles flux density measurement
mode.
To measure surface beta-particles flux density, remove the beta-filter cover
from the detector of gamma and beta radiation, direct the radiometer with the
detector in parallel to the examined surface and place it as close as possible.
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