Recognition Systems HANDKEY II Manual page 72

HandReader Maintenance
User Score Periodically check users' scores (refer to the Read Score section on page 61).
Scores should average under 30. Occasionally a user will score above 30. This is
not necessarily an indication of poor performance. If a number of scores average
over 30, clean the HandReader and check scores again. If scores remain high, or
if users are experiencing frequent rejections, run the Calibration command (see
page 45).
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