MIL-STD-810H
520.5 Combined Environments
MIL-STD-810H Part Two, Method 520.5
What It Evaluates
Combine at least three applicable environments using measured platform and installation data. Unless otherwise specified, limit temperature ramps to less than 5°C/min, alternate voltage through nominal, high, and low conditions, vary AC frequency between cycles, and withhold supplemental cooling for the first 2 minutes after power-on.
When It Applies
Applies when the product lifecycle, platform, storage, transport, deployment, or operating environment includes credible exposure.
Likely Procedures
Procedure selection requires engineering review of the item lifecycle and contract requirements.
Typical Ranges / Conditioning
Severity, duration, and conditions require engineering tailoring; no generic value is assigned by this tool. Conditioning details require review by qualified engineers and applicable contract requirements.
This tool provides preliminary planning information only. Final MIL-STD-810H, MIL-STD-461, and RTCA DO-160 requirements must be reviewed and tailored by qualified engineers based on the product, lifecycle, platform, environment, and contract requirements.