Please follow the instructions below:
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Click [Start] > [All programs] > [PenMount Universal Driver] > [Configure Utility].
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Choose [Device] tab > select [PenMount 6000 USB] > then press [Configure].

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Click [Calibrate] tab > find the drop down menu next to Advance Mode and change the setting to [25].
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Check [Plot calibration data] then click [Advanced Calibration].

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Follow the instruction to finish the 25 points calibration.