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SARAD GmbH
11
Manual_Smart-Radon-Sensor_EN_12-03-2020.docx
LED indicators
The Smart Radon Sensor has three color LEDs at the front panel. Their purpose is to indicate the state
of the instrument. The table below (tab. 2.) sums up all possible LED signals.
Permanent ON
RADON < 50% • AlarmTH(*)
Permanent ON
50% • AlarmTH =< RADON <
100% • AlarmTH
Permanent ON
RADON >= 100% • AlarmTH
Blinks
USB connection present
Blinks
Internal sensor clock not set
Blinks short
Main power supply failure(**)
Tab. 2. - LEDs signals.
(*)AlarmTH – Alarm threshold for Radon.
(**)The green and the yellow LED switched OFF, the analogue output deactivated.
Example: AlarmTH = 300Bq/m³.
The green LED will be active at Radon concentration below 150Bq/m
3
.
The yellow LED will be active at Radon concentration between 150Bq/m
3
and 300Bq/m
3
.
The red LED will be active at Radon concentration above 300Bq/m³.