The Laboratory of Meteorological Instruments Calibration
(LMIC) has been founded in 1996 and operates since at the
premises of the Institute for Environmental Research and Sustainable
Development (IERSD) at Lofos Koufou in the area of Palea Penteli.
The main goal of LMIC is, among other, to offer calibration
services for meteorological instruments and actinometers to the
private and public sector.
The LMIC calibrates meteorological instruments such as: thermometers
(mostly electronic, while liquid-in-glass thermometers are
checked for good operation only), thermographs, hygrometers
and hygrographs, pyranometers, photometers and rain gauges.
Data collection and processing is performed with high accuracy
instruments.
The laboratory is organized according to the Quality Assurance
standards. LMIC's Manual of Operations has been approved by
the EAA Administration Council and calibrations are carried
out according to International Standards. For all calibration
procedures, the LMIC staff has drafted Technical Guidelines
based on ISO standards, the current scientific best practice,
ISO Guide on the expression of uncertainty in measurements,
and the World Meteorological Organization (WMO)-No 8: "Guide
to meteorological instruments and methods of observations".
Calibration
of Actinometers |
In LMIC calibration of pyranometers is carried out according
to ISO 9847:1992. According to this process, the istruments
under calibration are placed in outdoor conditions, on a horizontal
surface, close to the standard Kipp & Zonen CM21 pyranometer
(Secondary Standard according to ISO 9060:1990 and High Quality
according to WMO).
Under constantly clear sky conditions, momentary measurements
of electrical voltage are taken at the instruments output
during whole daylight period and for solar altitude greater
than 20 degrees.
Calibrations are carried out comparatively, using calibrated
working standards, with readings traceable to the Global Radiometric
Scale. This method is simple and provides sufficient accuracy
because errors related to the dependence on solar incidence
angle and the instrument's spectral response are avoided.
Traceability is ensured as the 'secondary standard' used
in LMIC, is calibrated regularly at the World Radiation Center
(WRC), in Davos, Switzerland.
Calibration of photometers is carried out in a manner analoqous
to ISO 9847:1992, using a digital reference photometer LMT
B510A, with an LMT P30SCT sensor, operational range 0.001-600000
Lux, accuracy of sensitivity better than +/ - 0.5%.
The cost of calibration is 180 euros per actinometer (plus
VAT when applicable).
Calibration
of Thermometers |
According to the respective Technical Guidline followed in
LMIC, instruments under calibration are placed together with
the Pt-100 calibrated standard thermometer (ERTCO-Hart 850
High Precision RTD Thermometer and Isotech 100 Ohm PRT probe,
type: 935-14-85) either in a thermostatic bath Isotech Oceanus
model 809 (typical range -10°C ... +50° C), or in
a controlled temperature chamber WTB Binder KB-53 (typical
range 0°C ... +50° C).
LMIC's thermometer calibration process of is traceable to
the International Temperature Scale 90 as the standard used
is being calibrated regularly at the Hellenic Institute of
Metrology (HIM), Thessaloniki,
Greece.
The cost of calibration is 80 euros per thermometer (plus
VAT when applicable).
Calibration
of Hygrometers |
According to the LMIC technical Guidline for hygrometer calibration,
the instruments under calibration are either placed in a controlled
relative humidity chamber (Theodor Friedrichs, type 8222)
using as reference an Assmann pcychrometer (typical range
20%...100%) or exposed to the vapours of saturated solutions
of lithium cloride (LiCl - 11.3%, 20°C), sodium cloride
(NaCl - 75.5%, 20°C) and potassium sulfate (K2SO4
- 97.6%, 20°C).
The cost of calibration is 80 euros per hygrometer (plus
VAT when applicable).
In case of a combined digital thermo-hygrometer sensor, the
cost of calibration is 100 euros per sensor (plus VAT when
applicable).
Calibration
of Precipitation Gauges |
According to the LMIC Technical Guidline for rain gauges
calibration, the instruments under calibration are supplied
with a certain quantity of water in order to record the number
of pulses or other output produced.
The cost of calibration is 70 euros per instrument (plus
VAT when applicable).
Certificates
of Calibration |
When a calibration process is completed, LMIC issues a 'Certificate
of Calibration' for each calibrated sensor with the exception
of liquid-in-glass thermometers where a certificate of good
operation is provided.
Note: In case of calibration of 5 or more sensors of
the same type, there is a 10% discount.
Feel free to contact us for more information.
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Dr. Psiloglou Basil
Mathematician - Environmental Physicist
Senior Researcher of IERSD
tel.: 210 8109133
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Dr. Lykoudis Spyridon
Physicist- Environmental Physicist
Scientific Technical Staff IERSD/NOA
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Technical
Support- Analysts
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Dr. Lianou Maria
Physicist- Environmental Physicist
Scientific Technical Staff IERSD/NOA
Nikolaos Kappos
Mechanical Engineer
Scientific Technical Staff IERSD/NOA
Dr. Kalliampakos Georgios
Physicist- Nuclear Physicist
Scientific Technical Staff NOA
Dr. Katsanos Dimitrios
Physicist- Environmental Physicist
Scientific Technical Staff IERSD/NOA
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Indicative
Customers List |
- Institute for Environmental Research and Sustainable Development
(NOA)
- Public Power Corporation (PPC)
- Center of Renewable Energy Sources (CRES)
- AKTOR construction company
- University of Ioannina
- University of Aegean
Laboratory's telephone number: 210 8032503, 210 8109131,
210 8109133
IERSD's secretary telephone number: 210 8109122
Fax: 210 8103236
E-mail: bill@meteo.noa.gr
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