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Zavodnje
-O3-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
Local time +1 |
| Sampling |
| Sampling height |
: |
4 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuous air flow of 0.8 litres per minute through the ozone instrument and data is analysed every 60 seconds. |
| Sampling environment |
: |
The station is exposed to the influence of nearby thermal power plant, but those periods are short and easily recognisable. |
| Description for sampling analysis |
: |
UV-absorption
automatic sampling
Air is sampled through the round glass tube at 4 m height. The sampled air is introduced with teflon tubing to a ozone instrument. |
| Instrument and Analysis |
| Measurement method |
: |
Light absorption analysis (UV) |
| Current status and history of instrument |
: |
Period in use: 2000 - present
Product name: Model 400A OZONE ANALYZER
Manufacturer: TELEDYNE INSTRUMENTS
ADVANCED POLLUTION INSTRUMENTATION DIVISION (T-API) |
| Description of instrument |
: |
Custom ranges: 100 ppb to 10 ppm
Zero noise: <0.3 ppb RMS
Lower detectable limit: 0.6 ppb
Zero drift: <1ppb/24 hour
<1ppb/7 days
Span drift: <1% of reading/24 hour
<1% of reading/7 days
Rise/Fall time: <20 seconds (<10 seconds lag time)
Precision: 0.5% of reading
Linearity: <1% Fullscale |
| Calibration |
| Current scale employed in the measurement |
: |
Traceable to CHMI. |
| Measurement calibration |
: |
Every 24 hours an automatic zero check and span check is performed.
The instrument is calibrated to the transfer standard (LS 9812, serial number 1341) once a year (two point calibration: zero and 200 ppb). Transfer standard (LS 9812) is calibrated to the national standard (Thermo Environmental Instruments, Model 49C PS) which is traceable to the international level through yearly calibration at CHMI Prague (NIST Standard Reference Photometer (SRP) #17).
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| Scale and calibration(treasability) |
: |
0-200 ppb |
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
Guidelines for QA/QC are introduced. All irregular observations and information are recorded in a log book. Measurement data are telemetrically transmitted every 30 minutes to the Milan Vidmar Electroinstitute. Documentation and all technical activities (maintenance of the sampling system, maintenance and calibration of ozone monitor, servicing, etc.) is maintained at the Milan Vidmar Electroinstitute. Final data checking and validation is performed at the Milan Vidmar Electroinstitute. It consists of: visual inspection of the measurement data and zero/span stability, examination of major maintenance and servicing procedures at the site, examination of reports on calibration of ozone analyser at the site, examination of data on calibration against SRP and traceability to the primary standard. |
| Processing for averaging |
: |
Processing for Hourly Data:
Hourly average is calculated from two valid half-an-hour data.
Processing for Daily Data:
Daily averages until 2010 are calculated from valid hourly data. Daily averages after 2010 is calculated from valid hourly data. Valid data coverage must be 75%.
Processing for Monthly Data:
Monthly averages until 2010 including are calculated from valid daily data. Monthly averages after 2010 is calculated from valid hourly data. Valid data coverage must be 75%. |
| Data flag |
: |
According to EEA/DEM (European Environment Agency/Data Exchange Module) until the end of the year 2002.
EMEP flags are used from the beginning of the year 2003 (http://www.nilu.no/projects/ccc/submission.html) |
| Data remarks |
: |
Remark is flag information. See EMEP flagging system
(http://www.nilu.no/projects/CCC/flags/index.html). |
| Other Information |
| Scientific aim |
: |
To contribute measurements of ground-level ozone to the EMEP program particularly because of the scarcity of information on concentrations of photochemical oxidants in south-eastern Europe. The station is exposed to the influence of nearby thermal power plant, but those periods are short and easily recognisable. |
| Reference |
: |
EMEP data flags are used: http://www.nilu.no/projects/ccc/submission.html |
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| submitted by Slovenian Environment Agency |
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