Page numbers are from the Reference Guide (manual with configuration barcodes).
1. Page 8: Enter Setup (same on any even numbered page)
2. Page 8: Inter-Character Delay
3. Page 53: Scan barcodes for the digits of the delay you want, in milliseconds, from 0 to 255, then Validate. The suggested starting time is 10, then increasing that number if you still encounter problems. For 10, you would scan 1, then 0, then Validate.
4. Page 53: Update (same on any odd numbered page)