标准漏孔是包括一被测气体不可渗透的薄膜及形成于该薄膜内预定数目的通孔；通孔具有预定尺寸孔径，该孔径范围为纳米级。
通过传递标准漏孔与德国PT B开展了漏率比对，验证了测量不确定度评估结果的可靠性。
Through the leak-rate comparison with PTB using standard leak, the reliability of uncertainty evaluation results has been verified.
每次开机后，须先测试标准漏孔，然后测试不合格蒸发器样品应为不合格，测试合格样品应为合格（蒸发。器样品每月更换新的。）即校验仪器工作正常后，才能测试蒸发器。
Notice: Once begin the operation, standard leakage devices must be tested, then check the failed evaporator samples as "Fail" and passed evaporator samples as "Pass".
在漏孔校准过程中，通过调节稳压室中的压力，很容易使标准气体流量与漏孔漏率非常接近或相等，从而避免四极质谱计的非线性影响。
In calibrating the leak, the pressure in the ballast chamber can be precisely controlled in such a way that the standard gas flow through the orifice is close or equal to the leak rate.
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