Climatics and Dynamics

Temperature & Humidity Testing Capabilities

G&M offers temperature and temperature humidity testing in chambers ranging from small bench top to large drive-in systems. Our largest chamber is brand new in 2011 and was specifically oversized in design with inside dimensions of 12’ wide x 15’ long x 10’ tall and an 8’ x 9’door. We are capable of moving, installing, and testing multiple rack assemblies. G&M also operates a large walk in chamber that is especially equipped with twin 30 hp compressors and is capable of temperature transition rates exceeding 15 degrees Celsius per minute.

G&M operates a number of different temperature and temperature/humidity test chambers. Chambers range in size from small bench top to large drive in systems. Temperature capabilities range from -200 to +200 degrees Celsius.

Temperature Testing Specifications

• MIL-STD-810 Method 501.4 High Temperature
• MIL-STD-810 Method 502.4 Low Temperature
• MIL-STD-810 Method 503.4 Temperature Shock

Humidity Testing Specifications

• ASTM A380 – 06: Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems
• ASTM D2247 – 11: Standard Practice for Testing Water Resistance of Coatings in 100% Relative Humidity
• MIL-STD-202-103: Humidity (Solid State)
• MIL-STD-810F Method 507.4: Determines the ability to handle high Humidity
• SAE-AMS-STD-753 Corrosion-Resistant Steel Parts: Sampling, Inspection and Testing for Surface Passivation
• RTCA/DO-160 Section 6: Humidity

Thermal Shock Testing Capabilities

G&M offers thermal shock testing within any of our environmental chambers. Thermal shock testing, per MIL-STD 810 Method 516.5, is conducted to determine if equipment can withstand sudden changes in the temperature of the surrounding atmosphere without experiencing physical damage or deterioration in performance. As a result of exposure to sudden temperature changes, operation of the test items may be affected either temporarily or permanently.

Thermal shock testing has two objectives; 1) to determine if the test item can satisfy its performance requirements after exposure to sudden changes in temperature of the surrounding atmosphere and 2) to determine if the test item can be safely operate following exposure to the sudden change in temperature of the surrounding atmosphere.

Thermal Shock Testing Specifications

• MIL-STD 202 Method 107 Thermal Shock
• MIL-STD 202 Method 213 Shock
• MIL-STD 750 Method 1056.7 Thermal Shock (liquid to liquid)
• MIL-STD 750 Method 2016.2 Shock
• MIL-STD 810 Method 516.5 Shock

Altitude Testing Capabilities

G&M operates altitude test chambers capable of simulated altitudes up to 100,000 feet while providing temperature conditioning from -70 to +100 degrees Celsius. Additionally, our equipment is capable of performing rapid and explosive decompression testing, achieving pressure ramp rates of 10,000 to 40,000 feet in less than 100 milliseconds.

Altitude Specifications

• MIL-STD 202 Method 105 Barometric Pressure
• MIL-STD 750 Method 1001.2 Barometric Pressure
• MIL-STD 810 Method 500.4 Low Pressure

Shock Testing Capabilities

G&M offers shock testing on our electrodynamic shakers as well as through the use of our pneumatic shock machine. Additionally, we possess the necessary equipment to produce and analyze Shock Response Spectrum (SRS) shock events.

Our equipment is capable of delivering shock pulses exceeding 1,000 g’s. Shock testing on our electrodynamic shakers can be performed during vibration testing, prior to axis rotation, greatly reducing test time.

Shock Testing Specifications

• MIL-STD 202 Method 213 Shock
• MIL-STD 750 Method 2016.2 Shock
• MIL-STD 810 Method 516.5 Shock

Vibration Testing Capabilities at Keystone Compliance

Vibration testing at G&M can generate up to 13,000 force pounds on a single shaker. We have performed vibration testing in excess of 100 GRMS and can provide an unlimited number of data channels. Our vibration controllers offer tracked resonance dwell, automated response limiting to any profile, mixed mode vibration (sine on random, random on random), and classical and SRS shock testing.

• Vibration testing is conducted using two basic types of tests, random vibration testing (multiple frequencies at once) and sine vibration testing (one frequency at a time).
• Random Vibration Testing – A random vibration test provides all frequencies simultaneously and is considered to simulate real world movement. Random vibration tests can simulate vibration caused by different events such as operation, transportation and seismic.
• Sine Sweep Vibration – A sine sweep vibration test sweeps across a frequency spectrum to determine and identify any test article resonant frequencies.
• Sine Dwell Vibration Testing – A sine dwell vibration test simulates a worst case scenario where the EUT is excited at specific resonant frequencies.
• Sine-on-Random Vibration Testing – A sine-on-random vibration test is completed by superimposing a sine dwell over a random vibration profile.
• Mixed Mode vibration can also provide swept sine on random and random on random vibration environments.
• Vibration testing can also occur in conjunction with other testing. For instance, combined environment vibration is the simultaneous testing of an EUT to vibration and environmental conditions.

Vibration Testing Specifications

• ASTM D999-01 Standard Test Methods for Vibration Testing of Shipping Containers
• ASTM D3580 – 95(2010) Standard Test Methods for Vibration (Vertical Linear Motion) Test of Products
• ASTM D4728 – 06 Standard Test Method for Random Vibration Testing of Shipping Containers
• ISO 2247:2000 Packaging – Complete, filled transport packages and unit loads – Vibration tests at fixed low frequency
• ISO 8318:2000 Packaging – Complete, filled transport packages and unit loads -Sinusoidal vibration tests using a variable frequency
• ISO 9022-10:1998 Optics and optical instruments – Environmental test methods – Part 10: Combined sinusoidal vibration and dry heat or cold
• ISO 9022-15:1998 Optics and optical instruments – Environmental test methods – Part 15: Combined digitally controlled broad-band random vibration and dry heat or cold
• ISO 9022-19:1994 Optics and optical instruments — Environmental test methods – Part 19: Temperature cycles combined with sinusoidal or random vibration
• IEC 60068-2-64 Environmental testing Part 2: Test methods –Test Fh: Vibration, broad- band random (digital control) and guidance
• EIA-RS-186 Standard Test Methods for Passive Electronic. Component Parts. IEC Publication 68: Basic Environmental Test
• JIS C 0040 Japanese spec for vibration
• MIL-STD 167 Department of Defense test method standard – Mechanical vibrations of shipboard equipment
• Type I – Environmental
• Type II – Internally-Excited
• MIL-STD-202 Electronic and Electrical Component Parts
• MIL-STD-750 Test Methods for Semiconductor Devices
• MIL-STD-810 Department of Defense Test Method Standard for Environmental Engineering Considerations and Laboratory Tests
• NAVMAT P-9492 Navy Manufacturing Screening Program that provides guidance concerning the use of temperature cycling and random vibration as manufacturing screens for defects in both parts and workmanship.
• RTCA DO-160 Section 8 Vibration