Camera calibration on a hand reader, what should the row (r), column (c), and exposure (e) calibration values be to indicate proper camera alignment?

On a biometric F-Series or E-Series hand reader, the desired row (r) value and column (c) value should each be zero (0), plus or minus 2.  The desired exposure (e) value should be 100 with an allowable range of 95 to 120.

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