ECOTEST MKS-05 TERRA-P+ Operating Manual page 40

6.3.6 Surface beta-particles flux density measurement
This mode follows the mode of gamma radiation DE measurement. It is indicated
by the blinking light-emitting diode opposite the appropriate mnemonic symbol
below the LCD. Measurement units are expressed in 10
measure gamma background (for further automatic subtraction), and then measure
surface beta-particles flux density. To do this, wait until the digital LCD stops
blinking in the mode of DER measurement (filter cover covers the window of the
detector). Press shortly the MODE button twice. This will store the DER
measurement value as gamma background and switch the dosimeter from DER
measurement mode to surface beta-particles flux density measurement mode.
Remove the filter cover from the window, located opposite the detector, direct the
dosimeter with the window in parallel to the examined surface and place it as close as
possible.
40
3 2
part./(cm ·min). At first