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The last page contains the status information, beginning with the date and time of the start of
the measurement series followed by the actual alert settings in the second line. The lower line
shows the selected pump and sniffing mode.
To finish a measurement series keep the push button down and wait for at least four beeps
from the buzzer. If the button is released, the sample will be stopped. If the button has been
locked by software, the button has to be unlocked before.
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:
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
"Sniffing" means the search for radon entry paths, which are usually recognizable by locally
increased concentrations. Thoron can often be used as an indicator, since it is still available in
higher concentrations at such points (if any) and immediately decomposes in the measuring
chamber. In order to receive information as quickly as possible, the acoustic signal generator
can be set to "sniffing" mode. Each registered decay is indicated by a short signal.
SARAD GmbH 2023
>>17.04.06 16:32
ALM:
CONT.
INTERVAL: 1min
Manual_RTM1688-2_EN_24-02-2023.docx
250Bq/m³
SNIFF216
RTM 1688-2
9
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