ECOTEST STORA-TU RKS-01, Operating Manual, Page: 62 / 132

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The radiometer can automatically determine the specified statistical error
depending on the radiation intensity (Appendix A). The user can also do that in the
submode of alarm threshold level programming. A blinking “%” symbol means that
the user determined the statistical error.
If the specified statistical error is determined automatically by the radiometer,
its value is blinking on the LCD until it remains greater than the value of main
relative permissible error limit of surface beta-particles flux density measurement
(Table 1.1). If the specified statistical error is determined by the user, its value is
blinking on the LCD until it remains greater than the value of the specified statistical
error.
While the statistical error value keeps exceeding 99 %, the LCD displays the
“пп%” symbols.
Press the THRESHOLD button in the mode of surface beta-particles flux
density measurement to view the value of the specified statistical error. The value of
the specified statistical error is displayed on the LCD (Figure 13) while the
THRESHOLD button is being pressed and held down (but not longer than 3 s). A
zero value display means that the radiometer determined the specified statistical
error automatically depending on the radiation intensity.