ASTM G130-12
(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
SIGNIFICANCE AND USE
4.1 This test method represents the preferable means for calibrating both narrow-band and broad-band ultraviolet radiometers. Calibration of narrow- and broad-band ultraviolet radiometers involving direct measurement of a standard source of spectral irradiance is an alternative method for calibrating ultraviolet radiometers. This approach is valid only if corrections for the spectral response of the instrument and the spectral mismatch between the calibration spectral distribution and the target spectral distribution can be computed. See Test Method for a description of the spectral mismatch calculation.
4.2 The accuracy of this calibration technique is dependent on the condition of the light source (for example, cloudy skies, polluted skies, aged lamps, defective luminaires, etc.), and on source alignment, source to receptor distance, and source power regulation.Note 5—It is conceivable that a radiometer might be calibrated against a light source that represents an arbitrarily chosen degree of aging for its class in order to present to both the test and reference radiometers a spectrum that is most typical for the type.
4.3 Spectroradiometric measurements performed using either an integrating sphere or a cosine receptor (such as a shaped PTFE3, or Al2O3 diffuser plate) provide a measurement of hemispherical spectral irradiance in the plane of the sphere's entrance port. As such, the aspect of the receptor plane relative to the reference light source must be defined (azimuth and tilt from the horizontal for solar measurements, normal incidence with respect to the beam component of sunlight, or normal incidence and the geometrical aspect with respect to an artificial light source, or array). It is important that the geometrical aspect between the plane of the spectroradiometer's source optics and that of the radiometer being calibrated be as nearly identical as possible.Note 6—When measuring the hemispherical spectral energy distribution of an array of light s...
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 E824 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 e...
General Information
Relations
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: G130 − 12
Standard Test 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
Method E824 should be used.
1.4 Radiometers that may be calibrated by this test method
include narrow-, broad-, and wide-band ultraviolet
NOTE 1—Special precautions must be taken when a diode-array
spectroradiometer is employed in the calibration of filter radiometers radiometers, and narrow-, broad, and wide-band visible-
having spectral response distributions below 320-nm wavelength. Such
region-only radiometers, or radiometers having wavelength
precautions are described in detail in subsequent sections of this test
response distributions that fall into both the ultraviolet and
method.
visible regions.
1.2 Thistestmethodislimitedtocalibrationsofradiometers
NOTE3—Forpurposesofthistestmethod,narrow-bandradiometersare
against light sources that the radiometers will be used to
those with∆λ≤ 20 nm, broad-band radiometers are those with 20 nm≤∆λ
measure during field use.
≤ 70 nm, and wide-band radiometers are those with ∆λ ≥ 70 nm.
1 NOTE 4—For purposes of this test method, the ultraviolet region is
This test method is under the jurisdiction of ASTM Committee G03 on
defined as the region from 285 to 400-nm wavelength, and the visible
Weathering and Durabilityand is the direct responsibility of Subcommittee G03.09
region is defined as the region from 400 to 750-nm wavelength. The
on Radiometry.
ultraviolet region is further defined as being either UV-Awith radiation of
Current edition approved June 1, 2012. Published January 2013. Originally
wavelengths from 315 to 400 nm, or UV-B with radiation from 285 to
approved in 1995. Last previous edition approved in 2006 as G130–06 DOI:
315-nm wavelength.
10.1520/G0130-12.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
G130 − 12
1.5 This standard does not purport to address all of the photodiode(visible),oranultraviolet-enhancedPMTorsilicon
safety concerns, if any, associated with its use. It is the photodiode (ultraviolet and visible), or a lead sulfide cell or
responsibility of the user of this standard to establish appro- other solid state detector (near infrared), etc. The dispersed
priate safety and health practice
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: G130 − 06 G130 − 12
Standard Test 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
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
materials using manufactured light sources, and (3) UV-A and UV-B ultraviolet radiation in terms both
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.
1. 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 E824
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.
1
This test method is under the jurisdiction of ASTM Committee G03 on Weathering and Durabilityand is the direct responsibility of Subcommittee G03.09 on Radiometry.
Current edition approved June 1, 2006June 1, 2012. Published July 2006January 2013. Originally approved in 1995. Last previous edition approved in 20022006 as
G130–95(2002)G130–06 DOI: 10.1520/G0130-06.10.1520/G0130-12.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
G130 − 12
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 s
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.