viTABLE OF CONTENTS (contd.)Section 7: Maintenance ................................................................................................. 64Section 8: Communication Interface ............................................................................ 658.1 RS232 Serial Interface .............................................................................................. 658.2 Communication Syntax ........................................................................................... 65Appendix A: Error Codes .................................................................................................. 69Appendix B: Specifications ................................................................................................ 70Appendix C: Connector Pin-Outs ..................................................................................... 71Appendix D: Repair and Return Policies ........................................................................ 72