ASTM G130-95(2002)
(Test Method)Standard Test Method for Calibration of Narrow- and Broad-Band Ultraviolet Radiometers Using a Spectroradiometer
Standard Test Method for Calibration of Narrow- and Broad-Band Ultraviolet Radiometers Using a Spectroradiometer
SCOPE
1.1 This test method covers the calibration of ultraviolet light-measuring radiometers possessing either narrow- or broad-band spectral response distributions using either a scanning or a linear-diode-array spectroradiometer as the primary reference instrument. For transfer of calibration from radiometers calibrated by this test method to other instruments, Test Method E 824 should be used.
Note 1—Special precautions must be taken when a diode-array spectroradiometer is employed in the calibration of filter radiometers having spectral response distributions below 320-nm wavelength. Such precautions are described in detail in subsequent sections of this test method.
1.2 This test method is limited to calibrations of radiometers against light sources that the radiometers will be used to measure during field use.
Note 2—For example, an ultraviolet radiometer calibrated against natural sunlight cannot be employed to measure the total ultraviolet irradiance of a fluorescent ultraviolet lamp.
1.3 Calibrations performed using this test method may be against natural sunlight, Xenon-arc burners, metal halide burners, tungsten and tungsten-halogen lamps, fluorescent lamps, etc.
1.4 Radiometers that may be calibrated by this test method include narrow-, broad-, and wide-band ultraviolet radiometers, and narrow-, broad, and wide-band visible-region-only radiometers, or radiometers having wavelength response distributions that fall into both the ultraviolet and visible regions.
Note 3—For purposes of this test method, narrow-band radiometers are those with Δλ ≤ 20 nm, broad-band radiometers are those with 20 nm ≤Δλ ≤ 70 nm, and wide-band radiometers are those with Δλ ≥ 70 nm.
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 ultraviolet region is further defined as being either UV-A with radiation of wavelengths from 315 to 400 nm, or UV-B with radiation from 285 to 315-nm wavelength.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:G130–95 (Reapproved 2002)
Standard Test Method for
Calibration of Narrow- and Broad-Band Ultraviolet
1
Radiometers Using a Spectroradiometer
This standard is issued under the fixed designation G 130; 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 (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Accurate and precise measurements of ultraviolet irradiance are required in the determination of the
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 the
National Institute of Standards and Technology (NIST).
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 E 824 should be used.
include narrow-, broad-, and wide-band ultraviolet radiom-
NOTE 1—Special precautions must be taken when a diode-array spec-
eters, and narrow-, broad, and wide-band visible-region-only
troradiometer is employed in the calibration of filter radiometers having
radiometers, or radiometers having wavelength response dis-
spectral response distributions below 320-nm wavelength. Such precau-
tributions that fall into both the ultraviolet and visible regions.
tions are described in detail in subsequent sections of this test method.
NOTE 3—Forpurposesofthistestmethod,narrow-bandradiometersare
1.2 Thistestmethodislimitedtocalibrationsofradiometers
those with Dl# 20 nm, broad-band radiometers are those with 20 nm
against light sources that the radiometers will be used to
#Dl# 70 nm, and wide-band radiometers are those with Dl$ 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
1 region is defined as the region from 400 to 750-nm wavelength. The
This test method is under the jurisdiction of ASTM Committee G3 on
ultraviolet region is further defined as being either UV-Awith radiation of
Durability of Nonmetallic Materialsand is the direct responsibility of Subcommittee
wavelengths from 315 to 400 nm, or UV-B with radiation from 285 to
G03.09 on Solar and Ultraviolet Radiation Measurement Standards.
Current edition approved April 15, 1995. Published July 1995. 315-nm wavelength.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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G130–95 (2002)
1.5 This standard does not purport to address all of the 4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 This test method represents the preferable means for
responsibility of the user of this standard to establish appro-
calibrating both narrow-band and broad-band ultraviolet radi-
priate safety and health practices and determine the applica-
ometers. Calibration of narrow- and broad-band ultraviolet
bility of regul
...
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