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USER MANUAL
The full procedure for soil gas measurement is provided with the soil gas probe. As
described during this procedure it is required to switch off the pump of the
AlphaGUARD
manually:
1.
By pressing the 'OK' key for 5 seconds in the numeric measurement
windows (Acquisition 1/5 and 2/5), the pump can be switched off in the
1min and 10min Radon flow mode (manual stop). An acoustic signal is
issued and the 'pump off' flag in the DataQA is set.
2.
The manual stop is indicated by an unfilled pump symbol in the upper right
corner of the display.
3.
In the measurement status window (Acquisition 5/5) the flow rate shows
'Manual off'.
4.
The manual stop is not possible in the diffusion modes or in thoron mode.
5.
The manual stop is not possible while the interval mode is active.
6.
The manual stop of the pump can be terminated by the following actions:
a.
Pressing the OK key for 5 seconds in the numeric measurement
windows (Acquisition 1/5 and 2/5)
b.
Exiting the 'set pump flow' menu with the OK key
c.
A change of the operation mode
d.
A change in the analog channel 1 or 2 menu
e.
A change in the interval mode
f.
A change in the date/time menu
g.
After the execution of a memory clearing
h.
Turning off and on the device
-
During the recovery time the AlphaGUARD should be flushed with radon-
poor fresh air.
-
A fine-mesh filter cartridge (radon progeny filter) has to be connected
between Soil gas probe and AlphaGUARD. If there is a danger of seeping
water during the sampling of soil gas then additionally an aqua-stop filter
has to be connected between Soil gas probe and AlphaGUARD.
Note
For details regarding the simultaneous measurement of radon decay
products please see the Soil gas probe Instruction Manual.
Reference
