Emerson Rosemount5081, Instruction Manual, Page: 8 / 152

8.3.2 Diagnostic messages for dissolved oxygen .................................................................... 92
8.3.3 Diagnostic messages for ozone and total chlorine ......................................................... 93
8.3.4 Diagnostic messages for free chlorine ............................................................................93
8.4 5081-A troubleshooting ...............................................................................................................93
8.4.1
5081-A warning and fault messages .............................................................................. 93
8.4.2 Troubleshooting fault or warning messages .................................................................. 94
8.4.2.1 bAd SEnSor ........................................................................................................ 95
8.4.2.2 0 too bIG ............................................................................................................96
8.4.2.3 bAd rtd, TEMP HI, TEMP LO, and rtd OPEn .......................................................... 96
8.4.2.4 pH In .................................................................................................................. 96
8.4.2.5 SLOPE HI or SLOPE LO .........................................................................................97
8.4.2.6 -0- OFFSEt .......................................................................................................... 97
8.4.2.7 AdC ....................................................................................................................98
8.4.2.8 bAd Gnd .............................................................................................................98
8.4.2.9 In too biG ........................................................................................................... 98
8.4.2.10 RitE Err ............................................................................................................... 98
8.4.3 Temperature measurement and calibration problems ...................................................99
8.4.3.1 Temperature different from transmitter ............................................................ 99
8.4.4 Oxygen measurement and calibration problems ........................................................... 99
8.4.4.1 Zero current too high .........................................................................................99
8.4.4.2 Zero reading unstable ...................................................................................... 100
8.4.4.3 Sensor current different from below ................................................................ 100
8.4.4.4 Process and standard readings different ...........................................................101
8.4.4.5 Process readings erratic ................................................................................... 101
8.4.4.6 Readings drift. ................................................................................................. 102
8.4.4.7 Sensor not responding to oxygen changes .......................................................102
8.4.4.8 Oxygen readings too low ................................................................................. 102
8.4.5 Free chlorine measurement and calibration problems ................................................. 103
8.4.5.1 Zero current outside range .............................................................................. 103
8.4.5.2 Chlorine zero reading unstable ........................................................................ 103
8.4.5.3 Sensor current too low .....................................................................................104
8.4.5.4 Chlorine process readings erratic ..................................................................... 104
8.4.5.5 Chlorine readings drift ..................................................................................... 105
8.4.5.6 Sensor not responding to chlorine changes ......................................................105
8.4.5.7 Chlorine readings spike ....................................................................................105
8.4.5.8 Chlorine readings too low ................................................................................ 106
8.4.6 Total chlorine measurement and calibration problems ................................................ 106
8.4.7 Ozone measurement and calibration problems ........................................................... 106
8.4.7.1 Ozone zero current outside range ....................................................................106
8.4.7.2 Ozone zero reading unstable ........................................................................... 107
8.4.7.3 Sensor current less than 350 nA/ppm .............................................................. 107
8.4.7.4 Ozone process readings erratic ........................................................................ 108
8.4.7.5 Ozone readings drift ........................................................................................ 108
8.4.7.6 Sensor not responding to ozone changes .........................................................108
8.4.7.7 Ozone readings too low ................................................................................... 108
8.4.8 pH measurement and calibration problems .................................................................109
8.4.8.1 pH SLOPE HI or SLOPE LO ................................................................................. 109
8.4.8.2 pH -0- OFFSEt message .................................................................................... 109
8.4.8.3 Transmitter not accepting manual slope ..........................................................109
8.4.8.4 Sensor not responding to pH changes ..............................................................110
8.4.8.5 Process pH slightly different .............................................................................110
Contents
iv Rosemount 5081