MIL STD 810H Test Method 505.7 – Solar Radiation Sunshine Machine

MIL STD 810H test method 505.7-The thermal effect of solar radiation (sunshine) can cause thermal aging, oxidation, cracks, chemical reactions, softening, melting, sublimation, viscosity reduction, evaporation and expansion of electronic and electrical products. Temperature or local overheating caused by solar radiation can cause product expansion or lower lubrication performance, mechanical failure, increased mechanical stress, and increased wear between moving parts.

Solar radiation (sunshine) testing is one of the basic tests required for any military equipment planned to be deployed in the open and therefore subject to direct radiation from the solar source. The effects of this radiant energy can generally be divided into two groups or classes, heat effects and photochemical effects. Heat effects on exposed equipment can raise the internal temperatures of the equipment substantially above the ambient air temperature. Temperatures in excess of 160oF have been recorded in parked aircraft exposed to the sun while ambient air temperature was in the 90oF range.

Photochemical effects of sunlight may hasten the fading of colors and lead to the deterioration of plastics, paints, rubber and fabrics. The combined effects may lead to the outgassing of plasticizers in some materials along with discoloration and a reduction in transparency. The solar light spectrum has been accurately measured over the wavelength range of 280 – 3000 nm as well as the power distribution within this range, and it is this range that we would seek to reproduce in the Solar Radiation test. Reproducing this entire range using lamp sources however can be quite challenging.

MIL STD 810H Test Method 505.7 – Solar Radiation Sunshine Machine
WEWON-MIL-STD-810H-505.7Equipment Model
1300×500×500mm (L×W×H)Max Test Sample
1500×1000×1000mm (W*D*H)Inner Room Size
2400×1200×2200mm (W*D*H)Machine Appearance
MIL-STD-810 Test Method 505.7 Solar Radiation 1400×800mmIrradiation Area
Lamp Lighting ≥500 hoursLamp Service Life
2 Pieces Original ImportedQuantity of Lamps
Specific glass filterFilter Device
Scattering type bean grain aluminum plate combinationLampshade Reflector
280~3000 nm Method 505.7Energy Control Point
1120W/m2 ±47W/m2Irradiation Intensity
≤10%|MIL STD 810H Test Method 505.7 – Solar Radiation Sunshine MachineIrradiation Deviation
Built-in solar eye wireless optical fiber sensor, Radiation intensity advanced high-techIrradiation Intensity Adjustment
Automatic wind speed adjustment 0.25~1.5M/SWind Speed
+35~+60℃ (Adjustable)Air Temperature Range
+35~+60℃ (Temperature)Monitoring of Sample Surface
Test room or set light cycle: 20~75%RH; Dark cycle: 45~95%RHRelative Humidity
-3℃~ +3℃Temperature Uniformity
± 5%RH ToleranceHumidity Uniformity
The upper and lower position of the sample holder of the flat sand bed can be adjustedSample Device
Allow GB 150.7A Procedure I, Procedure IITest Conditions
Running time of the whole machine:0~9999H can be setSet Running Time
related page logoDepartment of Defense Test Method Standard Environmental Engineering Considerations and Laboratory Tests
related page logoGJB 150.7A-2009 Military Equipment Laboratory Environmental Test Method Solar Radiation Test
related page logoMIL-STD-810 Solar Radiation (Sunshine) Testing Overview [Method 505.7]– Trenton Systems United States
related page logoMIL STD 810 G – Defense Test Method 505.5 – Solar Radiation (Sunshine) by CELAB SRL Italy
related page logoCi4000 Weather Ometer – MIL STD 810H Test Method 505.7 – Solar Radiation Sunshine Machine
Sources emitting ultraviolet wavelengths between 280 and 400 nm tend to be quite costly and their performance deteriorates quickly. Some of the MIL-STD recommended sources such as xenon arc and carbon arc fall into this category. In fact, it was reported that the first commissioned sunshine test facility in 1945 fell short of the contract requirements due to several deficiencies, one of which was the amount of UV that could be produced at the test item. Cost and reliability issues are why many test labs have chosen to perform only Procedure I with source lamps covering the visible and infrared spectrum range of 400 ~ 3000 nm (0.4 – 3.0 μm)
Exposure MethodLarge experimental chamber space, flat sand bed sample rack can be placed three-dimensional irregular components
Light Source SystemOriginal imported 4.5KW metal halide lamp, lighting system is electronic special power supply with advanced trigger system.
FilterSpecific special filter components, so that the filtered spectrum fully meets the requirements.
Irradiation Energy ControlDigital setting of light intensity, real-time monitoring and automatic adjustment, in line with the standard, monitoring the full spectrum of 280-3000nm.
Temperature ControlThe air temperature control of the test chamber truly reflects the exposure temperature under direct sunlight. The measured data is processed by the CPU and displayed on the color screen in the form of numbers, graphs, curves, etc., without shutting down for observation.
Humidity ControlEnergy-saving and environmentally friendly nanotechnology and PTC high temperature dual humidification system, humidification tube anti-dry protection device, water consumption as small as 0.5L/min, test humidity is accurate and stable.
Data Output MethodThe instrument is equipped with a USB port, which can directly use a U disk to export the test data according to the EXL form file and read it on the computer.
Data Display Mode7-inch weinview large color touch screen display and control, Chinese operation, multiple test monitoring modes (number, curve, table), convenient control, intuitive and clear
Environmental ProtectionAdopt brand-new American high-tech aging box control design technology, energy-saving control mode, low noise of running parts
Standard SettingBuilt-in 11 groups of programs can customize a variety of test standards, and save them forever, directly choose to enter to start the test.
Protection DesignComprehensive safety monitoring and protection design, which can realize unattended and safe operation throughout the process
Remote MonitoringRealize remote monitoring and operation of mobile phone APP and computer network, saving working time and more convenient operation
Monitoring interfaceFriendly interface includes monitoring screen, status monitoring, running curve, etc.
MIL-STD-810H, Method 505.5 outlines two procedures for performing the Solar Radiation test. Procedure I requires a cyclic exposure based on the diurnal cycle and is most useful for determining heating effects on exposed materiel as well as materiel enclosed within a container. Procedure II is a steady state (non-cyclic) exposure most useful for evaluating actinic (photochemical) effects of ultraviolet radiation on materiel since it represents an accelerated test with a factor of 2.5.

MIL STD 810H Test Method 505.7

Solar Radiation Sunshine Controller System

MIL STD 810H Test Method 505.7

Solar Radiation Sunshine Controller System

MIL STD 810H Test Method 505.7

Solar Radiation Sunshine Controller System

MIL STD 810H Test Method 505.7

Solar Radiation Sunshine Controller System

 

Because Procedure I is more akin to a natural cycle and does not have the acceleration factor of Procedure II, it is not an efficient cycle with which to evaluate long term exposures. Therefore, when it is used mainly to evaluate the direct heating effect, Procedure I can be performed with source lamp arrays emitting less than the full solar spectrum. Procedure II however, demands full spectrum sources emitting light in the ultraviolet range if the total effects of long term exposure are to be properly evaluated. Page Source: https://nts.com/ntsblog/solar-radiation-testing-in-accordance-with-method-505-of-mil-std-810/
Display Device7-inch color touch screen man-machine interfaceControl System
Operating LanguageChinese/English Language
Operation ModeProgram operation (darkness, light cycle mode) or fixed value operation
Control ContentTemperature, relative humidity, irradiance, lamp temperature, irradiance exposure timer, over-temperature temperature setting, running time setting, temperature and humidity irradiance running curve monitoring, running status monitoring, alarm function monitoring
Test Standard DefinitionFixed value custom test space and 11 sets of program custom memory test standard space
Alarm Protection Function 1Over-temperature, fan overload, lamp overheating, water tank shortage, power supply lack of phase, humidifier to prevent dry burning, etc.
Alarm Protection Function 2When each fault occurs, the display screen directly indicates the cause of the machine fault and its troubleshooting method and the dynamic protection function is activated.
Data StorageAutomatic storage of large space, can be stored for 6 months
Data ExportUSB port U disk export function
Remote ConnectMobile APP, computer network remote operation control
Compressor BrandFrench “Tecumseh” Fully Enclosed CompressorCooling System
Cooling MediumFin-type high-efficiency evaporator, strong anti-frosting ability, small heat transfer temperature difference, very fast cooling rate
Heat Exchange SystemAir-cooled condenser, high-speed cooling and heat exchange effect by Marl’s high-power fan
When the primary concern is testing for heat effects, the question is often asked why an oven or chamber test for enclosed equipment could not be used in place of the Solar Radiation test. The primary reason is that ovens and chambers transfer heat from a uniform ambient atmosphere surrounding the test item, whereas the solar test transfers heat through direct radiation. The directional effect of radiant heating produces temperature gradients through the test item that are not replicated in ovens or temperature chambers.

MIL STD 810H Test Method 505.7 – Solar Radiation Sunshine Irradiation Intensity Test Curve

When a Solar Radiation test is required, Perform the Solar Radiation test prior to the High Temperature test, as the product temperature measured in the solar chamber may need to be used as the ultimate high operating temperature for the product. Consider the orientation of the test item within the solar chamber so as to replicate the in-use conditions with respect to both the direct radiant light energy and the airflow direction. This will affect both the temperature gradients and any cooling effects provided by the airflow.

When testing to Procedure I, remember that several consecutive cycles will likely be required for the product to achieve the ultimate high operating temperature for the most critical area of the test item to be within 2℃ of the previous cycle. This usually means 3 to 7 cycles. If operation of the test item is required, operational times will need to coincide with the peak response temperature of the test item in each cycle which will not coincide with the peak radiation intensity.
Lamp ProtectionIn order to make the lamp work normally without damage, this equipment uses a cooling system to interlock with the lamp. If the cooling system fails, the lamp will automatically go out and the whole machine will stop working.
Lamp TemperatureThe protection system has an independent lamp over-temperature setting protection to extend the service life of the lamp
Water Shortage ProtectionAll water refilling parts are automatically refilled, such as long-term water shortage of water tank parts, automatic protection and alarm
Humidification ProtectionHumidification tube is protected against dry burning and over-temperature, and humidification box is protected against water shortage
Power Phase SequenceLack of phase, phase sequence, leakage, protect the machine from damage when the power fails
Motor ProtectionMotor thermal overload protection to protect the stable operation of the motor
Protection SettingThe control system interface has temperature and humidity set value protection, if the temperature and humidity in the box exceed the set value, an alarm will be activated
Numerical ProtectionAutomatically save the running value after power failure
Reproduction of the required environment for the Solar Radiation test requires a chamber space in which the ambient air temperature and airflow over the test item can be controlled as well as a solar light source which may consist of a single source in the case of arc-type lamps or a multiple source array in the case of metal halide or incandescent type lamps. The distance of the light source from the test item may be varied to achieve the required irradiance. Airflow over the test item can significantly impact test results. When MIL-STD-810D introduced the “cycling for heat effects” (Procedure I) the guidance for airflow was to use airflow as low as possible consistent with achieving satisfactory control of the ambient air temperature at the test item or between 0.25 and 1.5 m/s (50 to 300 ft/min).
Lamp SourceImported metal halide lamp simulates the most realistic spectral energy, which can simulate the spectral value of sunlight to reach more than 98%Light Source System
Optical FilterImported specific filter combination
Turn on the Power SupplyAdvanced and reliable intelligent electronic power converter makes the light stable after the xenon lamp is lit
Irradiance ControlWireless optical fiber solar eye, closed loop system automatically adjusts the lamp output to provide the most stable and energy-saving radiation output.
Reflector LampshadeThe lampshade is made of special material, and it contains diffused bean-shaped reflective aluminum sheet.
Heater PartsChrome-plated wire heater or nickel-chromium alloy electric heaterHeating System
Temp ControlAdvanced PID solid state relay SSR continuous control mode|Military Standard 810 (MIL-STD-810) Testing
Original HumidificationProfessional SUS316# nanotechnology original, durable, no rust, long life, 3 times larger humidification capacity than traditional humidifiersHumidification System
Low Water ConsumptionThe dedicated and self-developed xenon lamp aging box humidifier reduces the water consumption in the damp and heat test compared with ordinary humidification systems: 38℃ and amp; 5%RH constant 24-hour water consumption is less than 0.2L/min, saving costs and reducing labor costs.
Low Power ConsumptionHumidity conditions have a large heat-to-humidity ratio and low humidification power. Compared with the ordinary humidifiers currently used by other manufacturers, the energy consumption of constant humidification at 38℃ and amp 95%RH is reduced by nearly 80%.
Humidifier ProtectionHumidification tube prevents dry burning and overheating protection.
This MIL STD 810H method 505.7 – Solar radiation sunshine test system is used to evaluate the ability of equipment directly exposed to the environment of solar radiation during the hot season of its life to withstand the thermal or photochemical effects of solar radiation. MIL STD 810H test method 505.7-The thermal effect of solar radiation (sunshine) can cause thermal aging, oxidation, cracks, chemical reactions, softening, melting, sublimation, viscosity reduction, evaporation and expansion of electronic and electrical products.

The current guidance from MIL-STD-810G has changed for procedure I to 1.5 to 3.0 m/s (300 to 600 ft/min) in recognition of better field data. The requirement for peak radiation intensity at 1120 W/m2 has changed little over the history of the Solar Radiation test although there have been slight changes to the spectral energy distribution based on updated measurement techniques of the actual solar source. It is suitable for determining the thermal effect of direct solar radiation on equipment and the photochemical effect of direct solar radiation on equipment.
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