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USER MANUAL
7.2.9.12
Show versions
This window gives an overview of the version numbers of the hardware and
software as well as information on the radon background of the measurement
chamber:
x
AlphaGUARD DF2000
version of AlphaGUARD
x
HW:
REV
1.0
hardware
revision
AlphaGUARD
x
BT: 1.0.14
firmware revision Bluetooth module
x
FW:AG0.013 v. Jul 04 2016
firmware revision AlphaGUARD
x
SN:
AG000012
serial
number
AlphaGUARD
x
CD:6FFFh
internal
use
x
FW:PM0.001 v. Jun 14 2016
firmware revision pump module
x
SN: PM000005
serial
number
pump
module
Compensation of background for PB-210 contamination of measurement
chamber:
x
U: +0
User offset: This parameter characterizes a positive or negative
offset, which can be allotted by the user to the AlphaGUARD for fine
tuning the automatic background correction. This term for fine tuning can
be determined by a measuring sequence in radon-free atmosphere.
x
T: +0
Total offset: This parameter is the sum of the automatically
calculated background (intrinsic effect) of the detector due to the
complete exposure history of the AlphaGUARD and the above mentioned
fine tuning term (User offset).
An accumulated exposure of 1 MBqh/m³, as result from the contamination of the
ionization chamber by long-living radon progeny products (Pb-210), produces an
internal rise of the background of 0,5 ... 0,9 Bq/m³. This can be observed with
subsequent low-level measurements in the form of increased statistical error of the
individual measuring values. If the scatter reaches a degree which cannot be
tolerated by the user any more, the manufacturer can provide revitalization
measures. The necessity and scope of revitalization procedure is always
determined by the total exposure of the radon monitor on the one hand and the
required precision in the low-level range on the other hand.
