Radon Monitor


Data File Format

Radon Detector Monitor stores all data in comma delimited (CSV) format, which can easily be imported by MS Excel or other spread sheet programs like OpenOffice.

Column headings should be interpreted as follows

Year
Current year
DOY
Day of year (three digit Julian day)
Month
Month of year (calculated from Julian day, not actually stored in the data logger)
DOM
Day of month (calculated from Julian day, not actually stored in the data logger)
Time
Time stamp in hh:mm format
ExFlow
External flow rate (L min-1). Calculated from gas meter (GM) revolutions
GM
Gas meter revolutions / 30 minutes. Raw value used in calculations of flow rate
InFlow
Internal flow rate (m/sec)
HV
High voltage (Volts)
Spare
spare column for future use
LLD
Lower level of discrimination (counts / 30 minutes)
ULD
Upper level of discrimination (counts / 30 minutes)
TankP
Tank pressure (arbitrary units or Pascals, depending on whether the pressure multiplier and offset values have been set in Settings (see section 3.1.4)
Temp
Logger temperature (ÂșC)
AirT
Temperature inside the detector tank
RelHum
Relative humidity (%) inside the detector tank
Press
Ambient air pressure
Batt
Internal battery voltage (Volts)
Comments
Comment line
Flag
Sets one of the following data flags:
0
normal radon detector operation
1
background
2
calibration
3
Maintenance, see Radon Detector Monitor Users Manual, p. 27
4
other problems with the detector automatically detected
9
transitional flag (2 hours) after completing background measurement

Additional fields

In the database which can be queried from the web we added some more fields to better organize the data.

Those fields are:

datetime
For convenience a field containing combined date/time in ISO 8601 format is prepended when queried from the web as "Data as comma separated values (csv) raw text".
location
This contains a numeric code identifying the location where the radon detector was installed when the data was recorded.
When queried from the web as "Data as comma separated values (csv) raw text" these fields are appended to every record.
Currently the following locations exist:
idloc_namelongitudelatitudeheight
1Schauinsland7.9073347.91481210
2Oensingen7.73291147.286460
3Jungfraujoch7.9820846.54743480
4University of Bern7.4385846.9513646
(5)K-Puszta, Hungary19.54542546.965293124
provis_rn_conc
Provisory calibrated radon activity value [Bq/m3] which is calculated based on the latest background level sequence and the latest calibration sequence.
rn_conc
Final calibrated radon activity value [Bq/m3] which is calculated based on interpolated background levels before and after the measurement and the mean of the two calibration values before and after the measurement. The calibrated radon activity values are not normalized to pressure and temperature.
A description of the script doing the processing on arrival of new data can be found here.
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