The TestEQ ESS test chamber applies controlled temperature cycling and rapid temperature transitions to production units in order to expose latent manufacturing defects before shipment. Environmental stress screening complements functional test by stressing every unit, or a defined sample, with a repeatable profile.
Applications
- Production screening for latent manufacturing defects
- Manufacturing quality control and early-failure screening
- Electronics, PCB assemblies and modules
- Automotive and EV electronics
- Components requiring a defined screening profile
Configuration and features
- Temperature range -70 °C to +180 °C.
- Temperature change rate 5 °C/min to 25 °C/min (optional).
- Temperature fluctuation < ±0.5 °C; temperature deviation < ±2.0 °C; temperature uniformity < 2.0 °C.
- Humidity and other environmental stresses can be combined depending on the screening program.
- Popular screening ranges: -40 °C to +85 °C; -45 °C to +85 °C (+125 °C); -55 °C to +85 °C (+125 °C) for military-level requirements.
- The stress profile is defined so that it exposes latent defects without exceeding the intended product screening limits.
- Chamber capacity, loading efficiency, throughput and repeatability are selected around the screening program.
Specifications
| Parameter | Value |
|---|---|
| Temperature range | -70 °C to +180 °C |
| Temperature change rate | 5–25 °C/min (optional) |
| Temperature fluctuation | < ±0.5 °C |
| Temperature deviation | < ±2.0 °C |
| Temperature uniformity | < 2.0 °C |
| Common ranges | -40 to +85 °C; -45 to +85 °C (+125 °C); -55 to +85 °C (+125 °C, military) |
| Humidity | optional, depending on screening program |
The temperature chamber model is the ET series.
Standards
Ess programs are commonly aligned with JESD22, IEC 60068, MIL-STD-810 and MIL-STD-883, and with thermal-cycling requirements such as JESD22-A104, IEC 60068-2-14, AEC-Q100 and ISO 16750.
To define a screening profile and throughput, contact us with the unit, defect history and required stress level. Related: HALT / HASS Test Chamber, Rapid Temperature Change Chamber.