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USER MANUAL
9
MEASURING OPERATION
Depending on the particular model the
AlphaGUARD
disposes of different
measurement modes which are optimized for their respective measuring
applications in terms of the hardware configuration as well as of the applied
evaluation algorithms (firmware).
Diffusion mode (D50, D2000, DF2000)
Measuring in diffusion mode is designated for ordinary radon monitoring outdoors
or in buildings. As both energy consumption and mechanical wear of the
measuring system are minimal with the diffusion mode this type of operation is best
suited for long-term surveillance. In order to compensate the time lag of such
measurements at occurring radon fluctuations (gradients), caused by the delay
of the measuring gas when entering the chamber by diffusing through the filter,
special algorithms for forecasting the true radon concentration in the ambient air
are applied (
→
fast design-optimized passive diffusion). Following preparatory
configuration measures are necessary for measuring in diffusion mode:
x
Check if the diffusion adapter is mounted. If not, unscrew the flow through
adapter by using the hexagon key and screw the diffusion adapter by
hand (see Figure 50 in reverse order).
x
Start the
AlphaGUARD
by pushing the ON/OFF button.
x
Check if set operation mode is OK (10 or 60 min, diffusion, Radon). If
necessary, change the required operation mode via menu (see 7.2.3) or
by means of a PC connected to the
AlphaGUARD
using
DataVIEW
or
DataEXPERT
software (see
DataVIEW
or
DataEXPERT
manual).
x
If mains operation is required (when battery is discharged and/or for long
term operation) simply connect the mains adapter.
When operating the AlphaGUARD DF2000 in diffusion mode, make sure that the
diffusion adapter is mounted in order.
-
to allow unhindered diffusion of the measuring gas through the entrance
window into the chamber,
-
to avoid damages of the plain filter as well as disturbances by
electromagnetic interferences.
Note
