问两个关于ECAP应力测试的问题

求高手解答，Damp Heat Steady State Test 和 Pressure relief vent，这两项测试是什么意思？翻译一下，简述一下这两项测试的方法和步骤过程。
Damp Heat Steady State Test
〔Conditions〕
Test temperature : +40±2℃
Relative humidity : 90 to 95%RH
Test time : 250 hours (Endurance time ≤2000H)
: 500 hours (Endurance time＞2000H)
After completion of test, the capacitors shall expose in the atmospheric condition for 1 to 2 hours,
and then measurements shall be taken.
〔Criteria〕
Capacitance change : Within ±20% of initial value. (Endurance time≤2000H)
Within ±10% of initial value. (Endurance time＞2000H)
Tan δ : Not more than 120% of the specified value
Leakage current : Not more than the specified value
Appearance : No leakage and damaged.
Pressure relief vent
Apply a reverse voltage with the DC current of 1 amp.(DC reverse voltage test)
When the pressure relief vent operated, the capacitor shall not flame although emission of
gas or a part of the inside element is allowable.
If the vent does not operate with the voltage applied for 30 minutes, the test is considered to be passed.
〔Criteria〕
No sparking; No shorting.
No breaking out of electrolyte paper;
Vent opening, no flowing down of electrolyte.