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Section Title Page
6.0 THEORY OF OPERATION...................................................................................... 45
6.1 The pH Sensor Assembly........................................................................................ 45
6.2 Continuous Sensor Diagnostics .............................................................................. 45
6.3 Interval Timer........................................................................................................... 46
6.4 Alarm Relays ........................................................................................................... 47
6.5 Time Proportional Control (TPC) Mode................................................................... 47
6.6 Normal Mode ........................................................................................................... 48
6.7 Analog Outputs........................................................................................................ 48
6.8 Controller Mode Priority........................................................................................... 49
6.9 PID Control .............................................................................................................. 50
7.0 SPECIAL PROCEDURES AND FEATURES.......................................................... 54
7.1 Password Protection................................................................................................ 54
7.2 Configuring Security ................................................................................................ 55
7.3 Solution Temperature Compensation ...................................................................... 56
8.0 TROUBLESHOOTING ............................................................................................ 58
8.1 Displaying Diagnostic Variables .............................................................................. 61
8.2 Troubleshooting Guidelines..................................................................................... 63
8.3 Replacement Parts .................................................................................................. 69
9.0 RETURN OF MATERIALS...................................................................................... 70
Appendix Title Page
A ORP CONFIGURATION.......................................................................................... 71
LIST OF TABLES
Table No. Title Page
5-1 pH Settings List .................................................................................... 22
5-2 Standard Buffers................................................................................... 44
6-1 Controller Mode Priority Chart .............................................................. 49
8-1 Diagnostic Messages ........................................................................... 59
8-2 Quick Troubleshooting Guide ............................................................... 60
8-3 Troubleshooting Guide ......................................................................... 66
A-1 ORP Settings List ................................................................................. 72
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MODEL 54e pH/ORP TABLE OF CONTENTS
TABLE OF CONTENTS (CONTINUED)