Calibrate the refractometer with water and press the Zero button.

校准折射水，并按下零按钮。

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There is also a Reset button on the page that resets the counter to zero.

在这个页面还有一个Reset按钮能够将计数器的值重置为零。

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If you want to reset the timer back to zero, hit the reset button.

如果你想重置计时器回零，按下复位按钮。

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If you want to reset the timer back to zero, hit the reset button.

如果你想重置计时器回零，按下复位按钮。

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