User manual

Background mode
This mode is made for examining inside the buildings.
In the «BACKGROUND» mode the estimation of the
radiation dose rate is similar to one in the «MONITORING»
mode (page 14), yet the display gives not just one but two
indications. One stands for the difference of a dose rate
between the average indication and background, the second
is for a background dose rate. This mode is convenient for
examining inside buildings, when it is necessary to know how
indications indoors differ from the ones outdoors.
The actuation of the «BACKGROUND»mode and setting
a background dose rate are given in the «BACKGROUND»
section (page 20). In the «BACKGROUND»mode the value of
a background dose rate (in the given example it is 0,10µSv/h)
is displayed on the LCD just below the title «RD1503+».
The difference of a dose rate between the indication (in
the given example it is 0,05µSv/h)and background (in the
given example it is 0,10µSv/h) is displayed after the end of a
cycle. Thus the value of an averaged indication is 0,15 µSv/h.
When the value of indicated dose rate is less than of a
background the value «0,00» and the icon « » is displayed.
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