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MIL-STD 883 Agree Life Testing

This method of MIL-STD 883 reliability testing helps determine the failure rate for microelectronic devices. It also demonstrates the quality or reliability of devices subjected to the specified conditions. Test conditions include a combination of temperature cycling, on-off electrical stressing and vibration. This is meant to simulate as closely as possible actual system applications and environments.

Keystone Compliance is a reliability testing lab, which is fully equipped to provide the best agree life testing. Our Test engineers have an in-depth knowledge of MIL-883 agree life and MIL-883 reliability testing requirements. The following information is extremely technical in nature. Below is provided a summary of MIL-STD-883 reliability testing.

What is Needed for Testing in the Reliability Laboratory?

All agree life compliance testing should take place in a fully equipped agree life testing lab. Agree life laboratories should be equipped with temperature chambers capable of meeting and holding the necessary temperatures. These labs should also have equipment capable of satisfying this method’s requirements for vibration.

Power supplies and current-setting resistors should be capable of maintaining the minimum specified operating conditions throughout testing. Power supplies must be capable of handling  variations in source voltages, ambient temperatures, etc.  Sometimes test conditions will result in significant power dissipation. In this case the test apparatus will be arranged to result in the approximate average power dissipation for each device.

The test circuits need not compensate for normal variations in individual device characteristics. They are arranged so abnormal devices in a group do not affect the test for the rest of the group. Testing apparatus should maintain the specified biases at the terminals of the device under test.

They should also, when specified, monitor the input excitation or output response. Suitable sockets are needed to make firm electrical contact to the terminals of devices in the specified circuit configuration. Generally, the mounting means should not remove internally-dissipated heat from the device by conduction. Heat may be removed through the device terminals, the necessary electrical contacts and the gas or liquid chamber medium.

What is the Procedure for the Reliability Compliance Testing?

The general procedure for agree life testing is similar to that of other MIL-883 reliability testing. Microelectronic devices are subjected to the specified test condition for the specified duration at the specified test temperature. The required measurements are made at the specified midway points and end points.

Lead-, stud-, or casonee-mounted devices are mounted by the leads, stud, or case in their normal mounting configuration device on. The point of connection is maintained at a temperature not less than the specified ambient temperature. The test condition, duration, sample size, and temperature selected prior to the test is recorded and used for the entire test. Test boards should not employ load resistors common to multiple devices, or to multiple output pins on  .

The are some procedural requirements specific to this method. Temperature is cycled, periodic vibration is applied, and electrical stresses are applied in on-off cycles. This occurs as required in the specified test level. Selection of the temperature range should take into account the temperature rise associated with the devices under test.

Certified and qualified QML manufacturers may modify test time or condition, provided the change is in the QM plan. The “Q” certification identifier must be marked on the devices. Below is a chart of acceptable test levels and conditions for agree life certification testing.

Test conditions
for method 1007
Test level
in accordance with
MIL-HDBK-781
Temperature range
°C

A

B

C

D

E

F

E

F

G

H

J

Test level F with modified low temperature

-54 to +55

-54 to +71

-54 to +95

-65 to +71

-54 to +125

0 to +70

Where is the Best Reliability Lab for Agree Life Testing?

Keystone Compliance is recognized as one of the best agree life labs in the country. Our test engineers are knowledgeable and able to provide the best reliability testing for your product. We are equipped to provide reliability certifications for commercial, military, and aerospace products. Contact us to learn why so many manufacturers rely on Keystone Compliance’s testing services to meet their compliance testing needs.

MIL-STD-883 testing contains several test methods. For more information about these test methods, please click on one of the links below.