Specifications

CARROLL TOUCH Appendix D - CTKERN Function Reference
Touch System Programmer’s Guide D-33
Normally, the time value is set to a value large enough so that entry and
exit coordinate transients resulting from the stylus not entering/leaving
straight into/out of the screen are eliminated, but small enough so that
the delay time is not noticeable. The typical range of values to achieve
this is 100ms through 500ms.