Altitude Testing

Altitude testing, also referred to as low pressure testing, per MIL-STD 810 Method 502.4, is performed to ensure that equipment can withstand and operate in a low pressure test or high altitude test environment. Altitude testing is intended to be used for air shipment of material in a plane, equipment designed for installation at high ground elevations and explosive decompression due to aircraft damage. Manufacturers of any device that is transported by air should consider the impact high altitude testing or low-pressure testing could have on their products. A low pressure test can simulate the problems high altitude can create such as:

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Climatics Testing

Keystone Compliance

Keystone Compliance operates an altitude test chamber capable of simulated altitudes up to 100,000 feet while providing temperature conditioning from -70 to +100 degrees Celsius.

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Humidity Testing

Keystone Compliance

Keystone Compliance offers temperature and temperature humidity testing in chambers ranging from small bench top to large drive-in systems. Our largest chamber was specifically oversized in design. With inside dimensions of 12’ wide x 15’ long x 10’ tall and an 8’ x 9’ door, Keystone Compliance is capable of moving, installing, and testing multiple rack assemblies. Keystone Compliance also operates a large walk-in chamber that is specially equipped with twin 30 hp compressors and is capable of temperature transition rates exceeding 15 degrees Celsius per minute.

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Icing and Freezing Rain Testing

Keystone Compliance

Icing and Freezing Rain testing is performed within any of our environmental chambers. With a drive-in chamber of 12’ wide x 15’ deep x 10’ tall, we are capable of performing icing and freezing rain tests on large test articles. Specially designed atomizing nozzles and pre-chilled water are used for the rapid formation of ice up to the prescribed thickness. With years of icing and freezing rain test experience, Keystone personnel have the knowledge to reach the desired ice thickness quickly and reduce test time and cost.

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Immersion Testing

Keystone Compliance

Keystone Compliance offers immersion testing to depths exceeding 100 feet. Immersion test setups are often unique to the test article and require the use of specialized pressure vessels. With multiple pressure vessels available, Keystone Compliance is able to offer immersion testing of various-sized test articles to almost any depth. Keystone Compliance operates various pressure vessels and associated support equipment. Keystone equipment is capable of simulating depths beyond 100 feet. One of the immersion test tanks measures 16 feet tall and has a radius of three feet.

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Salt-Fog Testing

Keystone Compliance

Keystone Compliance has a salt fog chamber that is one of the largest salt fog chambers manufactured and has an inside dimension of 8’ x 4’ x 4’. However, we have created custom oversized chambers to accommodate much larger devices including cars, drones and large pieces of machinery. If you have a large unit, we can likely find a way to test it. The chamber is capable of salt fog testing, salt mist testing, salt spray testing and salt laden testing as described in most popular test specifications.

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Solar Radiation Testing

Keystone Compliance

Solar radiation test setups are custom designed for each test setup. Solar arrays can be provided for small or large test articles. Arrays are designed and calibrated prior to placement of the test article. Testing takes place within any of our various temperature chambers. Solar arrays are microprocessor controlled and are capable of delivering greater than the 1,200 watts per meter squared as required by most commonly used test specifications. Custom programs can be designed to simulate real world test cycles of sunrise to sunset. Keystone Compliance offers Solar radiation testing for heating effects only.

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Temperature Testing

Keystone Compliance

Keystone Compliance offers temperature testing and temperature & humidity testing in chambers ranging from small bench top to large drive-in systems. Our largest chamber has inside dimensions of 12’ wide x 15’ long x 10’ tall and an 8’ x 9’ door. However, we have created custom oversized temperature chambers to accommodate much larger devices including cars, drones and large pieces of machinery. If you have a large unit, we can likely find a way to test it. Keystone Compliance is capable of moving, installing, and testing multiple rack assemblies. Our other large walk in temperature test chamber is equipped with twin 30 hp compressors and is capable of temperature transition rates exceeding 15 degrees Celsius per minute. This chamber permits temperature cycling testing on large items with aggressive transition times.

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Thermal Shock Testing

Keystone Compliance

Keystone Compliance currently offers thermal shock testing in two chambers. Both chambers offer approximately five-second transition times and can accommodate smaller products. We also have the ability to provide thermal shock testing to larger products by using two separate walk-in temperature and humidity chambers. If you have a large unit, we can likely find a way to test it.

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Wind and Rain Testing

Keystone Compliance

Keystone Compliance operates wind and rain generators that are capable of producing wind speeds exceeding 160 mph. Rain fall rates are practically limitless but are typically controlled to 4”, 6”, or 8” per hour. Automated turn tables are often utilized to ease testing of large products. Multiple generators can be setup to provide a large coverage area. Custom setups are a specialty for Keystone Compliance personnel when setting up a wind driven rain test.

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