SAPHYMO MiniTRACE CSDF, Руководство пользователя

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Instruction Manual for MiniTRACE CSDF
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08/2012 Page 11
2.4.3.1 Ambient dose rate equivalent measurement – H*(10) in
µSv/h
Select the “RATE” menu by using the mode button. Once “RATE” is displayed, wait 3
seconds; the menu will start automatically. For further details see Figure 3.
This mode reacts very quickly to changes in the radiation level.
To determine the ambient dose rate equivalent (H*(10)) correctly, the lid must be closed!
When the lid is open, the ambient dose rate equivalent is NOT calculated correctly.
The value is given in µSv/h.
Note: The ambient dose rate equivalent gives you important information for radiation
protection.
Dose limits for radiation protection in Germany are (in 2011):
•
Population 1 mSv/a
•
Professionally exposed persons: 20 mSv/a
2.4.3.2 Mean value of the ambient dose rate equivalent – H*(10) in
µSv/h
Select the “RMEAN” menu by using the mode button. Once RMEAN is displayed, wait 3
seconds; the menu will start automatically. For further details see Figure 3.
We recommend this menu if the ambient dose rate equivalent is “stable” in your environment
and you would like to determine the dose rate more precisely. The longer the measurement,
the higher the accuracy. This mode does NOT react to rapid changes in the radiation level.
To determine the mean value of the ambient dose rate equivalent (H*(10)) correctly, the lid
must be closed! When the lid is open, the mean value of the ambient dose rate equivalent is
not calculated correctly. The value is given in “µSv/h”. In the top left corner of the display,
statistical uncertainty is given. By default a statistical uncertainty of 3 sigma is calculated.
You can change the sigma value using the MiniTRACE software. For more details see the
software manual.
Note: The ambient dose rate equivalent gives you important information for radiation
protection.
Figure 5: Display in dose rate mean mode
2.4.3.3 Count rate measurement in cps
Select the “CPS” menu by using the mode button. Once “CPS” is displayed, wait 3 seconds;
the menu will start automatically. For further details see Figure 3.
This mode reacts very quickly to changes in the radiation level.
With this menu you can check the contamination of a surface, for example. The value is
given in
c ounts p er s econd (cps). With the lid closed only γ -radiation is measured. If you
open the protective lid (material: aluminum, thickness: 1 mm) you will see the Geiger-Mueller