热老化试验箱在下列情况下应进行型式检验： 
1、新产品或老产品转厂生产的试制定型鉴定； 
2、正式生产后，如结构、材料、工艺有较大改变，可能影响产品性能时；                                                                                                                                                                                                                                                                                                 3、正常生产时，定期或积累一定产量后，应周期性进行一次检验；                                                                                                                                                                                                                                                                                                                 4、换气式老化试验箱长期停产后，恢复生产时；                                                                                                                                                                                                                                                                                                                                             5、出厂检验结果如上次型式检验有较大差异时；                                                                                                                                                                                                                                                                                                                                             6、国家质量监督机构提出进行型式检验的要求时。 
    热老化试验箱型式检验项目为：JB/T7444-2008标准中第5.2条-5.5条。

温度波动度：±0.5℃
温度均匀度：±2.0℃
解析度：±0.1℃
空气换气次数:1-100次/h
试验定时范围：0.999.9
换气时间：0.99.9（s、m、h）
可调换气方式：仪表控制自动换气。
循环方式：风扇强制循环方式。