ECOTEST MKS-05 TERRA Operating Manual page 34

by the blinking light-emitting diode opposite the appropriate mnemonic symbol below the
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LCD. Measurement units are expressed in part./(cm ·min). At first 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. Consider the
arithmetic mean of five measurements after the LCD stops blinking as a result of the surface
beta-particles flux density measurement. Every registered beta-particle and gamma-quantum
will be followed by an audio signal.
Measurement intervals and subranges will be set automatically according to the measured
radiation intensity.
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