High and Low Temperature Testing: Exposure, Cycling, and Functional Review
High and low temperature testing observes appearance, structure, electrical performance, and functional stability under specified temperature conditions. It is commonly used for electronics, plastics, metal parts, packaging, outdoor products, automotive components, and consumer-product accessories. Before testing, companies should define the specific storage, transportation, operation, or temperature-cycling scenario.
Common Test Items
| Item | Review focus | Common risk |
|---|---|---|
| High-temperature exposure | Assess deformation, softening, cracking, performance drift, and functional abnormality | Only unloaded storage is tested while real operating heat is missed |
| Low-temperature exposure | Check embrittlement, shrinkage, startup failure, display abnormality, and sealing changes | Only post-recovery testing is performed, missing immediate low-temperature function |
| Temperature cycling | Observe thermal expansion, solder joints, adhesives, sealing, and connector stability | Cycles, ramp rate, or dwell time does not match the requirement |
| Sample status | Confirm packaging status, powered status, load condition, and mounting direction | Sample status does not match transport or use scenario |
| Functional retest | Record function, appearance, dimension, and electrical parameters before, during, and after testing | Only final appearance is recorded while functional decay is missed |
Report Boundaries
- The report should state temperature range, duration, cycles, sample status, and recovery condition.
- After material, structure, electronic component, battery, seal, or supplier changes, test coverage should be reviewed again.
- High/low temperature results apply to the stated conditions and should not be extended to every climate or use scenario.
- Customer-facing pages should avoid extending one temperature test beyond its stated scope.
Green Ark's Recommendation
Green Ark (Shenzhen) Certification Co., Ltd. recommends linking high/low temperature testing to real transportation, storage, and use scenarios, then building a checklist for temperature conditions, sample status, and functional retest items.
