For optimum accuracy, zero the instrument on the range to be used for measurement.

为了获得最好的准确度，应当在测量工作所使用的量程上对仪器进行调零。

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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.

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。

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Typically, the instrument is zero corrected while zero check is enabled.

通常，当仪器的零点检查功能打开时，仪器就会修正零点。

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But the threat of taking over a plane with a small, sharp instrument is zero.

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"The air marshals and the flight attendants have legitimate concerns, certainly, for their own safety, but the threat of taking over a plane with a small, sharp instrument is zero, " Hawley said.

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