Doza MKS-15D Snegir Manual do utilizador - Página 10
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When beta radiation flux density from other nuclides is measured, the correction factor for
dependence of the detector sensitivity on the beta radiation energy is required. Correction factors for
dependence of the detector sensitivity on the beta radiation energy for some beta radionuclides are
presented in the Table 2.1.
Table 2.1
Niclide
Correction factor
2.3.7 Count rate alteration at the combined (γ + radiation measurement
To measure the average beta and gamma radiation count rate, move the shutter control lever to
the extreme lower position until the background measurement is finished, - that is, until "F" character
appears in the outside left corner of the indicator. The message "BACKGROUND IS NOT DEFINED"
appears on the indicator; the background measurement is not stopped. After that the average count rate
value (exclusive of factors), in s
In the headline of the window the "γ+" symbol is indicated.
The measurement is resumed when the shutter is closed.
2.3.8 Control threshold setting
2.3.8.1 Control threshold may be set only for AEDR photon radiation measurement and beta
flux density measurement modes.
The control threshold is controlled:
1) at the shutter closed (the extreme upper position of the lever – "") – for the AEDR photon
radiation measurement mode;
2) at the shutter opened (the extreme lower position of the lever – "γ") – for the beta flux
density measurement mode.
2.3.8.2 Values of the set control threshold during the measurement:
-
photon measurement AEDR: from 0,01 μSv·h
-
beta radiation flux density: 1,0 to 9,99·10
-
the threshold values on default: switched off.
2.3.8.3 To set the control threshold values:
1) press the "START" button at the dosimeter switched off and hold it to turn on the dosimeter:
on the upper part of the indicator the message "SELECT POSITION" appears; release the button;
2) use the
and "MODE" buttons to set the required position:
-
AERD photon radiation threshold – Lγ,
-
beta flux density threshold - L;
3) press the "START" button: on the upper part of the indicator the "EDITION" message
appears; release the button;
4) set the required value using the
5) confirm the set value pressing the "START" button or cancel it pressing the
that the dosimeter switches over to the position selection mode;
6) to exit the mode, press the
2.3.9 Turning audible signal on/off
2.3.9.1 When the dosimeter is turned on, sound is turned on automatically; it is indicated as the
symbol at the top of the display window. To turn the sound off, press the
crossed speaker
will show that the sound is turned off. To turn the sound on, press the
again.
90
90
204
Sr(
Y)
Tl
1,0
1,7
-1
, and the "MONITORING" message are displayed on the indicator.
button and turn off the dosimeter pressing the on/off button.
FVKM.412152.005RE
60
14
Co
C
2,8
11,0
-1
to 9,99 Sv·h
6
-2
-1
· cm
·min
;
and "MODE" buttons;
10
-1
;
button. The symbol of
button; at
button