Place the Duo on the calibration standard provided with the unit
(or any other certified standard). Press the measure button to take a
measurement on the calibration standard.
The measured Ra value will be displayed at the end of the
measurement. To accept and complete the calibration, press the tick
button.
At any time, press the cross (x) button to exit the calibration menu.
If the calibration error is more than 10% then a warning is shown. To
complete and accept the calibration, press this icon.
Calibration
complete
Calibration
complete
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