You can equilibrate DO to zero, but you have to use nitrogen (others) to saturate it, otherwise, it is useless, this is what I think.

• 我们用梅特勒的DO，可以自动校准，因为只是在进罐前校正，我想只是校100%25吧，至于为什么不校0的原因，也不清楚。希望有人能够回答！