420 TW USER MANUAL CONTENTS Page 2 1.0 INTRODUCTION 3 2.0 UNPACKING 5 3.0 CONNECTIONS 6 4.0 RECONFIGURATION (applies to reconfigurable option units only) 7 5.0 RECALIBRATION 10 6.0 INSTALLATION 12 7.0 SPECIFICATIONS 13 IIG-9604-02