Shock and Vibration Information¶

Customers utilizing our System on Module designs in their products have needed to verify that the SO-DIMM connectors used could handle the necessary shock and vibration requirements of their applications. Below are descriptions of the testing some of our customers have performed.

Customer Case 1¶

Requirements:

1. Random Vibration levels from 6 to 20 Grms applied
2. Frequency range [50Hz to 5000Hz]

Testing:

The unit under test - MityDSP module and carrier board - was subjected to random vibration of 50Hz - 5000Hz starting at 6Grms level. The vibration level was increased from 6Grms to 20Grms in 2Grms increments. The dwell time at each level was 30 minutes where the frequency was varied between 50hz to 5000hz.

Results:

Once their testing was complete the units were returned to Critical Link to perform factory testing on them and verify that the units were fully functional. All testing passed.

Customer Case 2¶

Requirements:

Vibration

1. Meet MIL-STD-810F 514.5C-17
2. Random Vibration from 20Hz to 2000Hz for two hours in each of three perpendicular axes
3. Acceleration spectral density = .04 G**2/Hz

Shock

1. Drop the DUT along each of the three perpendicular axes at 20 Gs with an 11 ms duration for a total of 18 drops.

Testing:

Testing was conducted according to the requirements:

1. Vibration tests were performed by varying the vibration from 20Hz to 2000Hz for two hours in each of the three perpendicular axes at an acceleration spectral density of .04 G**2/Hz.
2. The shock tests were performed by dropping the DUT along each of the three perpendicular axes at 20 G’s with an 11 mS duration for a total of 18 shocks.

Results:

Once testing was complete all units were again verified to be fully functional. All testing passed.

Final Notes

In order to put the previous vibration levels into context, here is a list vibration levels experienced by rail cargo, US Highway truck cargo, and Jet aircraft cargo:

• Turbine engine vibration = .03 G**2/Hz
• Rail cargo = .002 G**2/Hz [0 -> 350Hz]
• Jet aircraft cargo = .01 G**2/Hz [11 -> 2000Hz]
• US Highway truck = .02 G**2/Hz