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Transcript
Keep the instrument as horizontal as possible. Aim at the lower point (2), press this button , the second distance is measured and adopted. Meanwhile, the height of (1) and (2) are displayed in the summary line. using 3 measurements Press this button twice; the display shows the symbol . Aim at the upper point (1) and press the button to trigger the measurement. After the first measurement， the value is adopted. Keep the instrument as horizontal as possible. 20
