Doza MKS-15D Snegir Manual do utilizador - Página 5
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1.3 Design and operation
1.3.1 All the units of the dosimeter are installed in a compact plastic house. The at the top of
the upper lid there is the display, to the left and to the right of the display the following control buttons
are located, the shutter control lever and the battery compartment are situated lower.
At the bottom of the cover there is a detector window which is closed by a shutter for beta
radiation shielding during the photon and background AEDR radiation (hereinafter – background); the
shutter is driven by a lever.
The power switch is located in the upper part of the dosimeter's side surface.
1.3.1.1 Control buttons of the dosimeter are as follows:
-
(illumination) – press the button to turn on the illumination for 15 seconds, press the
button at the illumination on to turn it off;
-
"MODE" – allows selecting windows of the display and switches the dosimeter from mode
when automatic restart is enabled (symbol "->!->" on the display) into a mode when automatic restart
is disabled (symbol "∞" on the display) and backwards when the button is pressed within more than
5 seconds;
-
"START" – resets the current value of the measured value and starts the new measurement
cycle;
-
(audible signal) – turns on
radiation.
1.3.1.2 The following modes of operation are available: with restart enabled (symbol "->!->"
on the display or with restart disabled – infinite acquisition (symbol "∞" on the display).
1.3.1.3 The measurement results of different operation modes are shown on the display in the
form of display windows for presentation of information:
-
current AEDR value in Sv/h
-
current AED value accumulated since turn-on of the dosimeter or since the last restart of
the current mode (thereinafter – DOSE window);
-
the value of beta radiation flux density in сm
-2
(thereinafter - β [сm
×
-
the average count rate for gamma- and beta-radiation, in s
The display windows have the following structure:
-
upper part: current operation mode - with autorestart ("->!->"symbol) or infinite acquisition
("∞" symbol); measured radiation: gamma (γ) or beta (β); confidence probability ( ), ( ) or ( );
presence
or absence
-
middle part: the measured value with indication of dimension and the estimated error of the
value (if provided);
-
bottom part: information about the current process of the background value measurement
(the outside left symbol):
1) countdown timer (8 - 6 - 4 - 2) – period of dosimeter testing and background estimation;
2) hourglass symbol
3) "F" character – the background is measured and the dosimeter is ready for beta radiation
flux density measurement;
4) if the control threshold is not set or not provided for the current mode, the set value of
control threshold is indicated as «-------» symbol.
1.3.1.4 To choose the corresponding display window, press briefly the "MODE" button.
Depending on the shutter position the display windows indicated in Table 1.1 are available.
-1
, estimated error, in per cent (thereinafter – AEDR window);
-1
min
] window);
of sound, residual capacity of batteries;
– background measurement;
FVKM.412152.005RE
or turns off
beep accompanying the detected
-2
-1
×min
at a continuous background account
-1
(thereafter - γ + β) window).
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