88.4.13 Sodium Electrode ................................................................................................................................. 648.4.14 Sulfide Electrode................................................................................................................................... 648.4.15 TRITON® DO80 ...................................................................................................................................... 648.4.16 TRITON® TR6 ......................................................................................................................................... 65APPENDIX ................................................................................................................................................................ 66A. Auto Cal Buffer Tables ..................................................................................................................................... 66B. T80 HART Menu............................................................................................................................................... 66D.MODBUS RTU Register Listing ......................................................................................................................... 6803 (0x03) Read Holding Registers .................................................................................................................... 6806 (0x06) Write Single Register ....................................................................................................................... 68Registers .......................................................................................................................................................... 69Fault Status ...................................................................................................................................................... 72Warning Status ................................................................................................................................................ 72Sensor Type ..................................................................................................................................................... 73E. Resistivity Temperature Compensation .......................................................................................................... 74F. SOFTWARE HISTORY ........................................................................................................................................ 74