ASTM G130-06

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Designation: G130 − 06
StandardTest Method for
Calibration of Narrow- and Broad-Band Ultraviolet
1
Radiometers Using a Spectroradiometer
This standard is issued under the fixed designation G130; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Accurateandprecisemeasurementsofultravioletirradiancearerequiredinthedeterminationofthe
radiant exposure of both total and selected narrow bands of ultraviolet radiation for the determination
of exposure levels in (1) outdoor weathering of materials, (2) indoor accelerated exposure testing of
materialsusingmanufacturedlightsources,and(3)UV-AandUV-Bultravioletradiationintermsboth
of the assessment of climatic parameters and the changes that may be taking place in the solar
ultraviolet radiation reaching earth.
Although meteorological measurements usually require calibration of pyranometers and radiom-
eters oriented with axis vertical, applications associated with materials testing require an assessment
of the calibration accuracy at orientations with the axis horizontal (usually associated with testing in
indoor exposure cabinets) or with the axis at angles typically up to 45° or greater from the horizontal
(for outdoor exposure testing). These calibrations also require that deviations from the cosine law, tilt
effects, and temperature sensitivity be either known and documented for the instrument model or
determined on individual instruments.
This test method requires calibrations traceable to primary reference standards maintained by a
national metrological laboratory that has participated in intercomparisons of standards of spectral
irradiance.
NOTE 2—For example, an ultraviolet radiometer calibrated against
1. Scope
natural sunlight cannot be employed to measure the total ultraviolet
1.1 This test method covers the calibration of ultraviolet
irradiance of a fluorescent ultraviolet lamp.
light-measuring radiometers possessing either narrow- or
1.3 Calibrations performed using this test method may be
broad-band spectral response distributions using either a scan-
against natural sunlight, Xenon-arc burners, metal halide
ning or a linear-diode-array spectroradiometer as the primary
burners, tungsten and tungsten-halogen lamps, fluorescent
reference instrument. For transfer of calibration from radiom-
lamps, etc.
eters calibrated by this test method to other instruments, Test
1.4 Radiometers that may be calibrated by this test method
Method E824 should be used.
include narrow-, broad-, and wide-band ultraviolet
NOTE 1—Special precautions must be taken when a diode-array
radiometers, and narrow-, broad, and wide-band visible-
spectroradiometer is employed in the calibration of filter radiometers
region-only radiometers, or radiometers having wavelength
having spectral response distributions below 320-nm wavelength. Such
response distributions that fall into both the ultraviolet and
precautions are described in detail in subsequent sections of this test
visible regions.
method.
1.2 Thistestmethodislimitedtocalibrationsofradiometers NOTE3—Forpurposesofthistestmethod,narrow-bandradiometersare
those with∆λ≤ 20 nm, broad-band radiometers are those with 20 nm≤∆λ
against light sources that the radiometers will be used to
≤ 70 nm, and wide-band radiometers are those with ∆λ ≥ 70 nm.
measure during field use.
NOTE 4—For purposes of this test method, the ultraviolet region is
defined as the region from 285 to 400-nm wavelength, and the visible
region is defined as the region from 400 to 750-nm wavelength. The
1
This test method is under the jurisdiction of ASTM Committee G03 on
ultraviolet region is further defined as being either UV-Awith radiation of
Weathering and Durabilityand is the direct responsibility of Subcommittee G03.09
wavelengths from 315 to 400 nm, or UV-B with radiation from 285 to
on Radiometry.
315-nm wavelength.
CurrenteditionapprovedJune1,2006.PublishedJuly2006.Originallyapproved
1.5 This standard does not purport to address all of the
in 1995. Last previous edition approved in 2002 as G130–95(2002) DOI: 10.1520/
G0130-06. safety concerns, if any, associated with its use. It is the
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G130 − 06
responsibility of the user of this standard to establish appro- 3.2 For other terms relating to this test method, see Termi-
priate safety and health practices and determine the applica- nology E772.
bility of regulatory limitations prior to use.
4. Significance and Use
2. Referenced Doc
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