ECOTEST STORA-ABG RKS-01 Operating Manual page 58

2.3.3.6.14 Photon-ionizing radiation DER is measured in the following way. As
soon as the measurement is started, the measurement results and the estimated limit
of statistical deviations of these results begin to appear on the LCD of the
radiometer.
Initially, the estimated limit of statistical deviations of the measurement results
is large. In the process of measurements, the estimated limit of statistical deviations
of measurement results decreases and eventually reaches the specified limit of
statistical deviations. After that, the measurement process continues, but some of
the statistical information begins to be rejected. Therefore, the estimated limit of
statistical deviations of all subsequent measurement results is equal to or less than
the specified one.
2.3.3.6.15 The user can restart the measurement process at any time. To do this,
press and hold THRESHOLD button until CLr characters appear on the LCD of the
radiometer. Release THRESHOLD button as soon as CLr characters are displayed.
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