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2.3.6.6.2 Operating mode of the control unit of the dosimeter
"Measurement results display obtained from the probes or detectors" during
beta radiation characteristics measurement
2.3.6.6.2.1 When measuring beta radiation characteristics the control unit
should be in the mode of measurement results display obtained from the probes or
detectors. The control unit always enters this mode after it is switched on. This mode
can also be accessed from any other mode by shortly pressing MODE.
In this case "β" should be set as the radiation type. Radiation type is selected
(among the permissible for the connected probe) by long press of RAYS/RESTART.
Press and hold RAYS/RESTART to change the type of radiation, and then release
RAYS/RESTART. If necessary, repeat these steps until you choose "β".
2.3.6.6.2.2 Surface beta-particles flux density is displayed in 1/(cm
∙min)). Surface activity of beta-emitting radionuclides - in Bq/cm
3
2
(10
/(cm
2
(kBq/ cm
). It is also possible to display pulse count rate from beta radiation detector
in cps.
Shortly press UNITS to change the measurement units (2.3.6.4 of this OM).
2.3.6.6.2.3 In this mode the following is displayed on the dosimeter's LCD
(Figure 2.18):
- "β" symbol (1) – radiation type being measured;
- blinking "γ" symbol (2) – indication that when beta radiation characteristics
are measured gamma-component of radiation is taken into account;
- measurement result (3);
- dimension of measurement result (4);
- estimated limits of expected relative statistical deviations (5) of the
measurement result (3) given 0.95 confidence probability, hereinafter referred to as
estimated limits of statistical deviations;
- instantaneous value indicator (6).
- battery status symbol (7);
- navigation receiver status symbol (8);
- symbol of sounding status of the registered gamma quanta, alpha or beta
particles (9);
- symbol (10) of alpha radiation presence (when beta radiation characteristics
are measured using ABG probe);
- sign (10) of critical filling of the dosimeter's nonvolatile memory, where DE
accumulation history is stored (2.3.4 of this OM).
55
∙min),
2
2
,
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