Temperature Life (Life Aging)

Measurement 3303.2 is a Temperature Life (Life Aging) test for fiber optic cable topology (FOCT) components. This measurement is performed when there is the requirement to subject the FOCT component or device under test (DUT) to an elevated temperature effect with a specified duration.This test is intended to be used as part of qualification testing. […] Read more

Shock Pulse

Method 213B is the Shock (Specified Pulse) test, conducted to determine the suitability of component parts and subassemblies of electrical and electronic components when subjected to shocks such as those expected from rough handling, transportation, and military operations.This test differs from other shock tests in that the design of the shock machine is not specified, […] Read more

Immersion – Condition B

Method 104 is the Immersion test to determine the effectiveness of the seal of component parts. The immersion of the part into liquid at widely different temperatures subjects it to thermal and mechanical stresses which readily detect a defective terminal assembly, or a partially closed seam or molded enclosure.Defects of these types can result from […] Read more

Resistance – Temperature Characteristic

Method 304 is the Resistance-Temperature Characteristic test to determine the percentage change in direct-current (DC) ohmic resistance from the DC ohmic resistance at the reference temperature, per unit temperature difference between the test temperature and the reference temperature.The equation used to calculate this characteristic, commonly called the ‘temperature coefficient of resistance,’ establishes how a component’s […] Read more

Resistance to Solvents

Method 215 is the Resistance to Solvents test with two purposes: (a) to verify that markings or color coding will not become illegible or discolored on parts when subjected to solvents normally used to clean solder flux, fingerprints, and other contaminants from printed-wiring and terminal-board assemblies; and (b) to verify that component protective coating, encapsulation […] Read more

Corrosion Resistance – Salt Fog – Condition B

Method 101 is the Salt Atmosphere (Corrosion) test. Specimens are subjected to a fine mist of salt solution to evaluate the effectiveness and quality of protective coatings and finishes on metals. Originally proposed as an accelerated laboratory corrosion test simulating the effects of seacoast atmospheres.Experience has shown that there is seldom a direct relationship between […] Read more

Low Temperature Operation

Method 4.7.29 is a low temperature operation test for military relays. The relay is subjected to the specified low temperature for a period of 48 hours. At the end of this period, with the relay still at the low temperature, the pickup voltage, dropout voltage, and contact voltage drop are measured.The measurements are performed as […] Read more

Mechanical Life

Method 4.7.28 is a mechanical life test (endurance at reduced load) for military relays. With rated coil voltage, the relay is cycled at 25 percent of rated resistive load for four times the specified minimum operating cycles for relays under 25 amperes contact rating (resistive), and two times the minimum operating cycles for relays of […] Read more

Resistance to Solvents

Method 4.7.23 tests resistance to solvents for military relays. Relays are tested in accordance with method 215 of MIL-STD-202 with the following exceptions: the portion to be brushed includes all markings.One sample shall be tested with each solvent solution. For qualification inspection, samples in excess of the available number of solvents are exempt from testing. […] Read more

Low Temperature Conditioning

Method 4.8.18 tests low-temperature conditioning and capacitance change with temperature for mica dielectric capacitors. In the first part (4.8.18.1), capacitors are placed in a chamber maintained at -55C +/- 3C with rated voltage applied for 48 +/- 4 hours, with circulating air.In the second part (4.8.18.2), capacitance is measured at the temperatures and in the […] Read more

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