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The ten-segment indicator of instantaneous value (3) is used for fast
evaluation of photon-ionizing radiation intensity. The integration time
during measurement of the instantaneous intensity value and the time of
information update on the instantaneous value indicator are equal to 500 ms.
The instantaneous intensity value is displayed in pseudo-logarithmic
scale. The first segment of the indicator becomes highlighted when the
intensity corresponds to 2 pulse/s pulse rate from the Geiger-Muller
counter. The greater photon-ionizing DER becomes the more scale
segments start to be highlighted from left to right. The scale becomes fully
highlighted when the intensity equals to 2900 pulse/s pulse count rate from
the Geiger-Muller counter. DER is about 1000 µSv/h in this case.
The sound symbol (4) means that audio signaling of registered gamma
quanta is on. If signaling is on, the sound symbol is displayed on the LCD
and each registered gamma quantum is followed by a short audio and/or
vibration signal, which depends on the chosen alarm type.
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