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  • BSI
    BS 7621:1993, ISO 9847:1992 Method for calibrating field pyranometers by comparison to a reference pyranometer
    Edition: 1993
    $2,380.87
    / 1 loc 1-31 users up to 10 books

Description of BS 7621:1993 1993

1.1 This International Standard specifies two preferred methods for the calibration of field pyranometers using reference pyranometers.

1.2 One method, the outdoor calibration or type I, employs solar radiation as the source, while the other method, the indoor calibration or type II, employs an artificial radiation source.

1.2.1 The outdoor calibration of field pyranometers may be performed with the pyranometer in a horizontal position (i.e. zero tilt) (type la), in a tilted position (type lb), or at normal incidence (type Ic) maintaining the receiver surface perpendicular to the sun’s beam component.

1.2.2 The indoor calibration of field pyranometers may be performed using an integrating sphere with shaded (type IIa) or unshaded (type IIb) lamp(s), or at normal incidence (type IIc) frequently using an optical bench to present the receiver surface perpendicular to the beam of the lamp.

Types IIa and lib correspond to an outdoor calibration under conditions of overcast and sunny sky with large light cloud fields, respectively. Type lie is comparable with the normal incidence calibration of type Ic.

1.3 The methods of calibration specified are traceable to the world radiometric reference (WRR); traceability to the International Pyrheliometric Scale of 1956 is not permitted.

1.4 This International Standard is applicable to most types of field pyranometers regardless of the type of radiation receptor employed. In general, all pyranometers used for long-term monitoring of incident solar irradiance may be calibrated by using the described methods, provided that the reference pyranometer has been calibrated at essentially the same tilt from horizontal as the tilt employed in the calibration.

NOTE 1 Pyranometers used for collector tests should be calibrated using a reference pyrheliometer (see ISO 9846).



Standard NumberBS 7621:1993, ISO 9847:1992
TitleMethod for calibrating field pyranometers by comparison to a reference pyranometer
StatusRevision Underway
Publication Date1993-01-15
Identical National Standard OfISO 9847:1992
DescriptorsRadiometers, Radiometry, Atmospheric radiation, Testing conditions, Calibration, Pyrheliometers, Solar power, Formulae (mathematics), Solar heating, Solar radiation
ICS07.060 Geology. Meteorology. Hydrology
CommitteeRHE/25
ISBN0 580 21524 5
PublisherBSI
Pages24



About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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