505.7-6 PREPARATION OF TEST FACILITY AND MATERIEL UNDER TEST
6.1 Referenced Documents
- a. MIL-HDBK-310, Global Climatic Data for Developing Military Products.
- b. NATO STANAG 4370, Allied Environmental Conditions and Test Publication (AECTP) 230; Climatic Conditions.
- c. “Ultraviolet Radiation,” L.R. Koller; Wiley, 2nd Edition, 1965.
- d. ISO 9060, "Solar Energy – Specification and Classification of Instruments for Measuring Hemispherical Solar and Direct Solar Radiation," 1990-11-01.
- e. ISO-9847 “Solar Energy – Calibration of Field Pyranometers by Comparison to a Reference Pyranometer,” 1992.
- f. ASTM E824-05, Standard Test Method for Transfer of Calibration from Reference to Field Radiometers, 2005
- g. The Photonics Dictionary, 2002 48th edition; Laurin Publishing.
505.7-6.1 Test Facility
Ensure that the optical parts of the facility, lamps, reflectors, and filters, etc., are clean. The level of irradiation over the specified measurement plane must be measured immediately prior to each test. Throughout the test continually monitor any ancillary environmental conditions, and other parameters as specified in the main body of this Method, paragraphs 4.1 and 4.2d.
6.2 Related Documents
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a. AR 70-38, Research, Development, Test and Evaluation of Materiel for Extreme Climatic Conditions.
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b. Synopsis of Background Material for MIL-STD-210B, Climatic Extremes for Military Equipment. Bedford, MA: AF Cambridge Research Laboratories, January 1974. DTIC number AD-780-508.
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c. Egbert, Herbert W. “The History and Rationale of MIL-STD-810 (Edition 2),” January 2010; Institute of Environmental Sciences and Technology, Arlington Place One, 2340 S. Arlington Heights Road, Suite 100, Arlington Heights, IL 60005-4516.
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d. NATO STANAG 4370, Allied Environmental Conditions and Test Publication (AECTP) 300, Climatic Test Methods, Method 305, Solar Radiation.
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e. "Ultraviolet Spectral Energy Distribution of Natural Sunlight and Accelerated Test Light Sources," R.C. Hirt, R.G. Schmitt, N.D. Searle and A.P. Sullivan; Journal of the Optical Society of America, July 1960, vol. 50, p. 706.
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f. "Studies of Spectral Energy Distribution of Different Light Sources in Connection with Solar Simulation," D.W. Gibson and J. Weinard; Institute of Environmental Sciences 1962 Proceedings, p. 453. Institute of Environmental Sciences and Technology, Arlington Place One, 2340 S. Arlington Heights Road, Suite 100, Arlington Heights, IL 60005-4516.
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g. “An Artificial Sunshine Solarium,” G.F. Prideaux, Illuminating Engineering, 1946, Vol. 12, p.762.
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h. “'Project Assess - a Report of a Long Term Solar Simulation Test,” R. Kruger, Institute of Environmental Sciences 1966 Proceedings, p. 271. Institute of Environmental Sciences and Technology, Arlington Place One, 2340 S. Arlington Heights Road, Suite 100, Arlington Heights, IL 60005-4516.
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i. “Spectral Distribution of Typical Daylight as a Function of Correlated Color Temperature,” D.B. Judd, D.L. MacAdam and G. Wyszecki; Journal of the Optical Society of America, August 1964, vol. 54, p. 1031.
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j. “Simulating the Solar Spectrum with a Filtered High-pressure Xenon Lamp,” E.A. Boettner and L.J. Miedler, Applied Optics, 1963, vol. 2, p. 105.
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k. "Modular Xenon Solar Simulation of Large Area Application," J.A. Castle, Institute of Environmental Sciences, 1967 Proceedings, p. 687. Institute of Environmental Sciences and Technology, Arlington Place One, 2340 S. Arlington Heights Road, Suite 100, Arlington Heights, IL 60005-4516.
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l. “Four-foot Solar Simulation System,” R.N. Harmon, Institute of Environmental Sciences 1966 Proceedings p. 531. Institute of Environmental Sciences and Technology, Arlington Place One, 2340 S. Arlington Heights Road, Suite 100, Arlington Heights, IL 60005-4516.
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m. "Radiation Instruments and Measurements," International Geophysical Year Manual, Part VI, 1958, Pergamon Press.
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n. "Deterioration of Materials," G.A. Greathouse and C.J. Wassel, Reinhold, New York, 1954.
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o. "The Simulation of Solar Radiant Energy," P.W. Baker, Environmental Engineering Quarterly June 1963, p. 17-19 and Sept 1963, p. 14-17.
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p. "Measurement of Spectral Irradiance," J. Arveson, Handbook of Solar Simulation for Thermal Vacuum Testing, Section 9B Institute of Environmental Sciences, 1968. Institute of Environmental Sciences and Technology, Arlington Place One, 2340 S. Arlington Heights Road, Suite 100, Arlington Heights, IL 60005-4516.
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q. “The Solar Constant and the Solar Spectrum Measured from a Research Aircraft,” M.P. Thekaekara, NASA TR R-351, Washington, DC, Oct 1970.
(Copies of Department of Defense Specifications, Standards, and Handbooks, and International Standardization Agreements are available online at https://assist.dla mil.
ASTM documents are available from the ASTM International Website.
Requests for other defense-related technical publications may be directed to the Defense Technical Information Center (DTIC), ATTN: DTIC-BR, Suite 0944, 8725 John J. Kingman Road, Fort Belvoir VA 22060-6218, 1-800-225-3842 (Assistance--selection 3, option 2), http://www.dtic.mil and the National Technical Information Service (NTIS), Springfield VA 22161, 1-800-553-NTIS (6847), http://www.ntis.gov/.
MIL-STD-810H METHOD 505.7, ANNEX A
METHOD 505.7, ANNEX A
DETAILED GUIDANCE ON SOLAR RADIATION TESTING
505.7-6.2 Materiel Under Test
The method of mounting and the orientation of the test item relative to the direction of radiation will have marked influences on the heating effects. The test item will probably be required to be mounted either on raised supports or on a substrate of specified properties, e.g., a layer of concrete of specified thickness or a sand bed of certain thermal conductivity and reflectivity. Include all this and the attitude of the test item in the relevant specification. Special attention must be paid to the surface conditions of the test item to see that its finish is clean or in accordance with the relevant requirements. The heating effect on the test item will be largely affected by the condition of its external surfaces. Care must therefore be exercised in handling the test item, especially in avoiding oil films and in ensuring that the surface finish and its underlay are fully representative of production standards. Attach temperature sensors to the test item as required (but see also paragraph 5.3 of this Annex).
6.3 Ground Reflected Radiation
In some cases, such as with a white sand or snow ground cover, and the test item in close association with this surface, significant reflected radiation can be applied to the test item. This effect can be measured using a radiometer designed to measure the "albedo" radiation. This sensor is primarily consists of a upward-facing radiometer and a downward facing radiometer. If the test item is to be substantially used in an environment where ground reflected radiation is a concern, consider the albedo radiation in the test design with radiation provided to the lower surface of the test item by auxiliary lighting, or the use of similar reflective material in the test set up.