最后，在完成每次取样和净化顺序后，必须借助于水游离度测量来校正测量仪器的零点，以确保可以进行下一个读数。
Finally, after each sampling and cleaning sequence the measurements’ zero point ischecked with a water freeness measurement to make sure the next reading isrepeatable.
在另一些情况下，则可以使用REL(零点)功能将其从读数中减去，或者简单地使用内置的零点抑制功能(如果仪器具有此功能的话)将其消除。
In other cases, it can either be subtracted from the reading by using the REL (zero) feature or simply canceled out by using built-in zero suppression if the instrument has this feature.
仪器的零点读数也会随着环境温度的变化而变化。这种效应通常称为电压偏置温度系数。
The zero reading may also vary as the ambient temperature changes. This effect is usually referred to as the temperature coefficient of the voltage offset.
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