CONTENTSD-52/53/54/55 VII6.5.2 More troubleshooting .................................................................... 1667 Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1737.1 pH measurement............................................................................. 1747.2 mV (oxidation-reduction potential [ORP]) measurement............ 1807.3 Ion measurement ............................................................................ 1867.4 Conductivity measurement............................................................ 1907.5 Dissolved oxygen measurement................................................... 1977.6 Specifications ................................................................................. 2007.7 Default settings............................................................................... 2027.8 Operation flowcharts...................................................................... 2037.9 Pin layout of special cables......................................................... 2077.9.1 RS-232C communications cable ................................................ 2077.9.2 Cable for CITIZEN printer ............................................................. 2077.9.3 Cable for SEIKO printer ................................................................ 2077.10 Spare and optional parts.............................................................. 2087.10.1 Spare parts list ........................................................................... 2087.10.2 Options ......................................................................................... 215
