Nikon PROSTAFF 7i Instruction Manual page 14

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3-3. Press the POWER ON/Measurement button to start measurement.
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After measurement, the result is displayed for approx. 8 seconds, then power automatically turns off.
If you press the POWER ON/Measurement button during power-on, another measurement starts.
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Pt
Example of measured distance
* Continuous measurement function
Press and hold the POWER ON/Measurement button to start continuous measurement up to approx.
8 seconds. During measurement, the measured result is displayed consecutively while the laser
irradiation mark is blinking.
If you release your finger from the button, continuous measurement stops.
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display
Example of measurement failure