4
Short-Term Display
The display for the short-term reading is an average of the
levels of radon gas over the past seven days. The short-term
reading allows the user to monitor short-term fluctuations in
the home and provide a better feel for problems relating to
seasonal and weather related variations in the radon levels. A
green LED next to the letter “S” indicates this reading. When the
short-term measurement reaches 4.0 pCi/L (200 Bq/m
3
) or
greater, for 30 consecutive days or more, the audible alarm
will sound (see
Audible Alarm
).
Long-Term Display
The display for the long-term reading is an average of the
levels of radon gas for the length of time that the detector has
been powered up or last reset. This reading relates to the
average radon level that you would be exposed to if you were
in the continual presence of the Safety Siren Pro Series3
Radon Detector. A green LED next to the letter “L”
indicates this reading. When the reading on the long-term
reaches a level of 4.0 pCi/L (200 Bq/m
3
)or greater an audible
alarm will sound immediately.
Start-Up
Upon initial power-up, the display will momentarily show an
internal code including letters and numbers. This code is
used to determine if the detector is calibrated for use within
the USA or Europe. The detector will conduct a self-test and
the audible alarm will sound four chirps. The display will
then read “--”. The two dashes will remain until sufficient
samples have been taken to create an accurate reading. For
the short-term and long-term readings, samples need to be
taken for 2 days (48 hours) before an accurate reading can be
displayed.
Upon initial power-up, the display will momentarily show an
internal code including letters and numbers. The detector
will conduct a self-test and the audible alarm will sound four
chirps. The display will then read “--”. The two dashes will
remain until sufficient samples have been taken to create an
accurate reading. For the short-term and long-term readings,
samples need to be taken for 2 days (48 hours) before an
accurate reading can be displayed.
Please note:
pCi/L refers to USA model HS71512.
Bq/m
3
refers to Canada model HS79712.
