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SARAD
RADON-SCOUT
5
compensated by the instrument, therefore the sampling process is not affected. Disturbance
during longer periods of time needs to be avoided by selecting an appropriate place of
exposure. Measurements during transport must not be carried out.
In case that the device had been moved during measurement, the corresponding integration
interval will be marked to detect e.g. an unauthorised transportation or a movement with
admission.
Selection of the right integration interval
Radon-Scout will store 672 (RADON-SCOUT-PLUS = 16383) measurement records. In case
that this maximum of data will be exceeded, the oldest data in the history will be erased and
overwritten by the last cycle result (circular memory). Set the interval long enough to avoid
data lost in case of measurements over long time periods.
3
If the assumed or predicted Radon concentration is smaller than 200 Bq/m
, the integration
interval should set to three hours. Otherwise the statistical error of each single value below
200Bq/m³ will exceed 20%. The integration interval can be changed by software only. The
RADON-SCOUT-PLUS allows integration intervals from 1 to 255 Minutes. From the physical
point of view intervals less than 60 Minutes make no sense because of the response time.
Lock toggle switch
To avoid a sudden or unintended interruption of a measurement campaign by unauthorised
staff, the toggle switch can be locked by software. Two variants of the lock function have
been implemented:
1 - The function is activated if the instrument is in stand-by mode (stopped)
It will be possible to start a measurement and stop it one time. After setting the button into
STOP position, the sampling will be finished and the result of the whole test period appears
in the display (1. line Start time/date; 2. line Stop time/date; 3. line result without statistical
error). The result remains in the display until a new sample is started.
After the first access to the instrument via the serial port (any command), a new start is
possible and the unit operates in the same manner as long as the lock function remains
activated.
2 - The function is activated while the sampling is already in progress
In that case the display is also disabled but it will be impossible to stop the measurement by
the toggle switch. The lock can be released only by the unlock function using in the PC
software.
In both cases the shows the display during the measurement period "Radon-Scout" instead
of the results. The green LED is flashing periodically.
For the standard unit without display only the second version of the lock function is
implemented.
Interfaces (RS232 and USB)
The serial interface according RS232 standard is required to read out measurement data and
to adjust the measurement parameter of the Radon-Scout. Please note that the power
consumption of the instrument is about five times higher if connected to the PC by the data
transfer cable. In case that the device is permanently connected to a PC, the battery life-time
is reduced due to that. The RS232 port is also used for connecting a modem or ZigBee
wireless adapter.
Alternatively, the USB port can be used for communication. In that case, a software driver
(available on SARAD website) must be loaded and installed before. The communication path
appears as an additional COM port in RadonVision.
Manual_Radon-Scout_EN_24-03-17.doc
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