4
24. Code Management.................................................................................110
24.1 Edit Code list..........................................................................................110
24.2 Clear all Codes .......................................................................................111
25. Warning and Error Messages ................................................................112
26. Check and Adjustment ..........................................................................113
26.1 The Instrument Constant ........................................................................113
26.2 Tubular Level .........................................................................................114
26.3 Circular Level.........................................................................................114
26.4 The Optical Sight ...................................................................................115
26.5 Optical Plummet (optional).................................................................115
26.6 Laser Plummet........................................................................................116
26.7 Vertical Cross-hair on Telescope ............................................................117
26.8 Horizontal Collimation Error C..............................................................117
26.9 Tilt Sensor ..............................................................................................118
26.10 Vertical Index Error..............................................................................120
26.11 EDM Optical Axis and the Telescope Sighting Axis Error ..................121
27. Technical Data..........................................................................................123
28. Accessories............................................................................................129
Appendix I: Atmospheric correction formula and chart (Just for reference) .129
Appendix Ⅱ:Correction for refraction and earth curvature.......................131
Appendix III:Connect the TS680 series and PDA with serial port .............132
Appendix IV Connect the TS680 series and PDA with Bluetooth.................134