The users are having to constantly reconnect the Koamtac scanner to the tablet each time.

Cause and Solution

This can be caused by powering the Koamtac off.  When the Koamtac is powered off, it forgets about the previously paired device.

Leave the Koamtac turned on to avoid this scenario.  Refer to this page for further tips on how to setup a Koamtac scanner with your device.