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2.3.6.6.2.4 After the measurement start, measurement results of beta radiation
characteristics (3) and estimated limits of statistical deviations (5) of these results
begin to be generated on the LCD. Measurement results are updated every 2 seconds.
If the measurement results exceed the alarm threshold level, the dosimeter
generates a two-tone audio signal and blinks with the ALARM LED. Measurement
results are blinking on the LCD of the dosimeter.
If measurement results exceed the upper limit of measurement range by more
than 30 %, "пппп" symbols are displayed on the LCD instead of the measurement
results.
In the event of beta radiation characteristics measurement, the dosimeter can
operate with three independent threshold levels. One is expressed in 1/(cm
∙min)), the second one - in Bq/cm
3
2
(10
/(cm
Measurement results are compared only with one threshold level, the measurement
units of which correspond to the selected measurement units of the results. Only this
threshold level can be viewed or changed.
A twenty-segment instantaneous value indicator (6) is intended for quick
assessment of beta radiation intensity. An instantaneous value of beta radiation
intensity is shown in pseudologarithmic scale. The greater the intensity, the more
segments of the indicator are highlighted from left to right. The integration time
during measurement of instantaneous value of beta radiation intensity and the time
of information update on the instantaneous value indicator is 500 ms
The estimated values of surface beta-particles flux density and surface activity
of beta-emitting radionuclides, in the event of which the first and all segments of the
indicator are highlighted, are shown in Table 2.5.
Figure 2.18 – LCD of the dosimeter
(measurement of beta radiation characteristics)
2
2
, (kBq/cm
), the third one - in cps.
56
∙min),
2
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