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SARAD GmbH
7
Adjustment of the sampling interval
The adjustment can be carried out as long the sampling is stopped. The "TOGGLE" button
must be hold down for at least 6 seconds (beeper). On the display appears:
INTERVAL: 1min
Now, the interval can be toggled by the button between 1, 5, 10, 15, 30, 60 and 120 minutes.
To accept the new setting, the button must be pressed again for at least 6 seconds.
Operation Modes
Pump
There are two different pump modes available, either continuous or interval pumping,
selectable by software. In continuous mode the pump is running during the whole
measurement period while the pump will switch off after the first five Minutes of each new
integration interval in case of interval mode. If the selected integration interval is less than
five Minutes the pump will run continuously too.
Alarm
If the measured Radon concentration exceeds the programmable alarm limit, the buzzer will
sound shortly each second. The alert has to be acknowledged by pressing the push button.
The alert check is performed after completion of each integration interval. If the alert is
enabled, "ALARM ON" will appear in the lower line of the status page.
Fast/Slow Mode
"Fast" and "Slow" mode will determine the kind of calculation of the Radon concentration.
Please refer to the chapters "Theory of Operation" and "Statistical Error".
Sniffing
The sniffing function allows the user to detect Radon by an audible signal. That means that
any disintegration of the daughter products (either Po-216 only or Po-216 and Po-218,
dependent on the user settings) will cause a short beep. Especially the Po-216 (if present)
with its short half-life will give a rapid information about local concentration changes.
Data Handling
Data Storage
All data are stored in a non-volatile memory using a circular architecture. That means, the
last 511 data records (data of last 511 integration intervals) remain in the memory. Older
data will be overwritten if the memory exceeds the limit. Because the complete
measurement data are transferred during download to the PC, the memory should cleared
after successful data transmission and storage on hard disk. This will save time during the
next transmission and avoids redundant data storage.
Each data record is stored after completion of the integration interval and contains the full
information of this single integration interval:
User Manual RTM1688-2 06-02-2019.docx
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