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The menu and the display of the current measuring values can be suppressed by
entering a settable keycode. There are two levels of locking the device:
Lock menu:
The last displayed acquisition screen is visible, no
access to menu or the other acquisition screens.
Lock menu and display: The device is completely locked, no access on
menu or acquisition screens. No acquisition
screen is visible.
The AlphaGUARD can be switched off by pushing the On / Off switch for min. 3
sec.
Flow charts showing the complete menu structures can be found in the appendix.
Electrical Connection Block
AlphaGUARD has five different electrical connections, located in the middle of the
front panel.
Figure 7: AlphaGUARD – electrical connections
If the radon concentration in the measurement chamber exceeds 1000 Bq/m³
when switching it off
, the AlphaGUARD shows a warning message and flushes
the measurement chamber by running the pump in 0,5 l/min flow rate for 3
minutes. Ensure that all tubes are disconnected during the flushing.
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