What Is Rain — MIL-STD-810?
The rain test is a test in which the specimen is exposed to rain or sprayed water generated with a defined flow rate, droplet size and wind speed, evaluating water ingress and functional degradation.
Purpose of Rain — MIL-STD-810
The purpose is to verify that equipment intended for outdoor use does not admit water under rain and retains its function.
Which Products Is Rain — MIL-STD-810 Applied To?
- Military outdoor equipment
- Vehicle-mounted equipment
- Aerospace exterior-surface units
- Portable communication devices
In Which Sectors Is Rain — MIL-STD-810 Used?
Standards Related to Rain — MIL-STD-810
- MIL-STD-810environmental engineering assessments and laboratory tests test
Rain — MIL-STD-810 Conditions
- Rain rate
- Defined in the standard; given in mm/hour
- Wind
- Wind speed is applied with a blower when defined in the method
- Droplet size
- Within the range defined in the standard
- Temperature difference
- In some procedures the specimen is kept warmer than the water temperature
Equipment for Rain — MIL-STD-810
- Rain test chamber and spray rig
- Flow-rate and droplet-size measurement system
- Wind blower
- Function-monitoring equipment
Sample Requirements for Rain — MIL-STD-810
- The specimen must be in operating configuration and its real orientation
- Gaskets and covers must be final
- The presence of water on internal surfaces must be examined after the test
- The number of samples is defined in the program
Duration of Rain — MIL-STD-810
Typically 3–7 days, depending on the procedure and the number of orientations.
Rain — MIL-STD-810 Procedure
- 1The specimen is placed in its real orientation.
- 2Rain rate and wind condition are verified.
- 3Exposure is applied for the defined duration.
- 4Function is monitored during the test.
- 5The specimen is opened and checked for water ingress.
Rain — MIL-STD-810 Acceptance Criteria
The acceptance criterion is defined in the programme: no functional degradation and no water ingress into critical volumes.
Evaluation of Results
IP protection-class tests (IEC 60529) and the MIL-STD-810 rain test are not the same; the military method includes conditions such as wind effect and a temperature difference. An IPX4 certificate does not meet the military rain requirement.
Rain — MIL-STD-810 Report
- Applied standards and procedures
- Rain rate, droplet size and wind speed
- Specimen orientation
- Time
- Function results and water-ingress findings
Accreditation
EUROLAB holds internationally recognised accreditation obtained from accreditation bodies party to the IAF and ILAC multilateral recognition arrangements, under ISO/IEC 17025 for laboratory testing, ISO/IEC 17020 for inspection and surveillance, and ISO/IEC 17021-1 and ISO/IEC 17065 for system and product certification. This chain ensures the reports and certificates issued are accepted worldwide.
Whether this test can be offered within accredited scope depends on your product and the standard applied; since accreditation is method-based, the scope is confirmed in writing at the quotation stage.
Scope and authorisationsRelated Regulations
- Defence and aerospace qualification specifications
Savunma Testleri — What Does This Testing Field Cover?
The section below describes the field that the Rain test belongs to; the conditions and acceptance criteria of this particular test are given in the sections above. The scope specific to your product is confirmed in writing at the quotation stage.
Defence testing shows that equipment keeps working in a military mission environment. What distinguishes it from civil testing is not only the severity of the levels; the ASSUMPTION ITSELF is different. The equipment must work on the first attempt, after months of storage, in an environment where maintenance is not available, inside a platform crowded with its own transmitters and receivers.
This assumption shapes the test plan. For a civil product "normal use" can be defined; for military equipment what is defined is the LIFE CYCLE ENVIRONMENTAL PROFILE: the exposure of every stage is listed — from manufacture to storage, from storage to shipment, to transport on a vehicle, to use in the field and to maintenance — and the testing is derived from that list.
On the environmental side, MIL-STD-810 methods are applied: temperature, humidity, altitude, rain, sand and dust, salt fog, fungus, shock, vibration, explosive atmosphere and gunfire vibration. The standard itself sets no acceptance criterion; which method is applied at which level, and what is acceptable, come from the programme specification.
On the electromagnetic side, MIL-STD-461 requirements come into play and interference within the platform is controlled. It measures the same physics as civil EMC but with a different assumption: the equipment will operate on a platform crowded with its own radars and radios, and interference inside the platform puts the mission directly at risk. The limits are therefore far stricter.
Power quality is a separate body of work. MIL-STD-1275 for military vehicles and MIL-STD-704 for aircraft define the supply characteristics: voltage ranges, transients, ripple and interruption behaviour. This is where commercially derived equipment most often gets stuck when integrated into a military platform.
On the shock side, naval vessels carry their own regime: the MIL-S-901 high-impact shock test simulates the effect of an underwater explosion and tests the equipment on a real impact machine. This is an entirely different scale from classical laboratory shock testing.
The suitability of commercial off-the-shelf (COTS) equipment for military use is a growing subject in the field. Cost and lead time pressures encourage the use of commercial products; but a commercial product is not considered suitable unless it has been through the military profile, and a gap analysis plus additional qualification is required.
In this family the test plan comes from the PROGRAMME SPECIFICATION. The phrase "complies with MIL-STD-810" is therefore not a verifiable claim on its own; which method, which procedure, which level and which revision must all be answered.
Method groups in this field
Environmental
MIL-STD-810 methods: temperature, humidity, altitude, solar radiation, rain, sand and dust, fungus, salt fog, immersion, explosive atmosphere.
Mechanical
Vibration (random, sine, gunfire), shock, acceleration, free fall and transport simulation.
Electromagnetic
MIL-STD-461 CE/CS/RE/RS requirements; MIL-STD-464 at platform level.
Power quality
Conformity to the MIL-STD-1275 vehicle and MIL-STD-704 aircraft supply characteristics.
High-impact shock
The MIL-S-901 naval shock test; simulation of the effect of an underwater explosion.
Component qualification
MIL-STD-883 microelectronics and MIL-STD-202 electronic parts test methods.
Commonly confused in this field
- The phrase "MIL-STD-810 certified" is incorrect; the standard produces no certificate, the output is a qualification report.
- A conformity claim that does not state the method, procedure and level cannot be verified.
- The revision letter (F, G, H) changes the content of methods and the procedure numbers; the specification must state the revision.
- A civil EMC report does not replace MIL-STD-461; the limits, distances and set-ups are different.
- Power quality is the requirement most often skipped when integrating a commercial product into a military platform.
- Applying a method does not show that the equipment maintains its function in that environment; the functional acceptance criterion is defined separately.
Which decisions these results support
- Qualification under a supply contract
- Component verification before platform integration
- Suitability of commercially derived equipment for military use and gap analysis
- Specification compliance in NATO and export programmes
- Establishing the life cycle environmental profile
Related Tests
Frequently Asked Questions About Rain — MIL-STD-810
According to which standard is Rain made?
Rain is executed in scope MIL-STD-810 Method 506, RTCA DO-160 Section 10, IEC 60529 (IP protection classes) and MIL-STD-810. The limit values and acceptance criteria to be applied are defined in the product standard; The version valid for your product is confirmed in writing at the offer stage.
Which products does Rain apply to?
Mainly applied to Military outdoor equipment, Vehicle-mounted equipment, Aerospace exterior-surface units and Portable communication devices. Whether your product is included in the scope is determined by examining its technical specifications and intended use.
Under what conditions is Rain done?
The determining parameters are: Rain rate — Defined in the standard; given in mm/hour, Wind — Wind speed is applied with a blower when defined in the method and Droplet size — Within the range defined in the standard. The full terms are in the "Test Conditions" section on the page and vary depending on the product standard.
What kind of sample is needed for Rain?
The specimen must be in operating configuration and its real orientation, Gaskets and covers must be final and The presence of water on internal surfaces must be examined after the test. The number of samples is determined according to the product standard and the scope to be reported.
How long does Rain take?
Typically 3–7 days, depending on the procedure and the number of orientations. This duration belongs to the experiment itself; sample preparation, queuing and reporting are also evaluated. A realistic schedule for your product is given in the offer.
What is the Rain result called "appropriate"?
The acceptance criterion is defined in the programme: no functional degradation and no water ingress into critical volumes.