Emerson Rosemount5081, Instruction Manual, Page: 7 / 152

8.1.5.3 SLOPE Err LO or SLOPE Err Hi appear after calibration attempt ............................69
8.1.5.4 bF1 or bF2 continuously flashes during auto calibration ..................................... 69
8.1.5.5 pH reading in buffer drifts during manual calibration ......................................... 70
8.1.5.6 Buffer calibration is acceptable; process pH is slightly different from expected
value ..................................................................................................................71
8.1.5.7 Buffer calibration is acceptable; process pH is grossly different from expected
value ..................................................................................................................71
8.1.5.8 Temperature reading is inaccurate .....................................................................72
8.1.5.9 HART communications problems .......................................................................72
8.1.5.10 No display .......................................................................................................... 73
8.1.5.11 Display segments missing .................................................................................. 73
8.1.5.12 Transmitter locks up .......................................................................................... 73
8.1.5.13 Transmitter periodically restarts itself. ............................................................... 73
8.1.6 Displaying diagnostic variables ...................................................................................... 74
8.1.6.1 Purpose ..............................................................................................................74
8.1.6.2 Displaying diagnostic variables .......................................................................... 74
8.1.7 Testing the transmitter by simulating the pH .................................................................75
8.1.7.1 Overview of simulating a pH input ..................................................................... 75
8.1.7.2 pH simulation when the preamplifier is located in the transmitter ..................... 75
8.1.7.3 pH simulation when the preamplifer is located in a remote junction box or in a
sensor-mounted junction box ............................................................................ 77
8.1.7.4 pH simulation with 381+ sensor .........................................................................78
8.1.7.5 pH simulation when preamplifier is in sensor ..................................................... 81
8.1.8 Factory assistance and repairs ........................................................................................81
8.1.8.1 Troubleshooting assistance ............................................................................... 81
8.2 Contacting and toroidal conductivity diagnostics and troubleshooting ........................................ 81
8.2.1
Overview of Diagnose menu ..........................................................................................81
8.2.1.1 Troubleshooting contacting conductivity analyzers ........................................... 81
8.2.1.2 Displaying diagnostic values .............................................................................. 81
8.2.2 Fault conditions ............................................................................................................. 82
8.2.2.1 Disabling faults .................................................................................................. 82
8.2.2.2 Non-disabling warnings ..................................................................................... 83
8.2.3 Diagnostic messages ..................................................................................................... 83
8.2.4 Quick troubleshooting guide ......................................................................................... 84
8.2.4.1 Field troubleshooting .........................................................................................85
8.2.5 Systematic troubleshooting ...........................................................................................86
8.2.6 RTD resistance values .................................................................................................... 86
8.2.7 5081C warning and fault messages ............................................................................... 87
8.2.8 Troubleshooting contacting and toroidal conductivity analyzers when a fault or warning
message is showing ....................................................................................................... 88
8.2.8.1 OuEr rAnGE and AMP FAIL .................................................................................. 88
8.2.8.2 SEnSor FAIL ........................................................................................................ 88
8.2.8.3 CAL Error ............................................................................................................89
8.2.8.4 nEEd 0 CAL ......................................................................................................... 89
8.2.8.5 rtd FAIL, TEMP HI, and TEMP LO ..........................................................................89
8.2.8.6 SenSE OPEn ........................................................................................................90
8.2.8.7 OFFSEt Err .......................................................................................................... 90
8.2.8.8 FAct FAIL procedure ........................................................................................... 91
8.2.8.9 CPU FAIL and ROM FAIL ...................................................................................... 92
8.2.8.10 AdC Error ........................................................................................................... 92
8.3 5081-A Diagnostics ...................................................................................................................... 92
8.3.1
Diagnostics overview .....................................................................................................92
Contents
Instruction Manual iii