User ManualTable of ContentsDESCRIPTION AND SPECIFICATIONS1Features1Accessories2Specifications - General for Model 3081 pH/ORP3Specifications - pH4Specifications - ORP4Ordering Information4INSTALLATION7Unpacking and Inspection7Pre-Installation Set Up7Model 3081 pH/ORP Transmitter - Exploded Drawing of Circuit Board Stack8Model 3081 pH/ORP Transmitter - Analog Board9Orienting the Display Board10Mechanical Installation10Model 3081 pH/ORP Transmitter - CPU Board10Mounting the Model 3081 pH/ORP Transmitter on a Flat Surface11Power Supply/Current Loop13Load/Power Supply Requirements13Power Supply/Current Loop Wiring13WIRING14General Information14Wiring and Preamplifier Configurations for pH and ORP Sensors14Wiring Diagrams for pH and ORP Sensors15Wiring Diagrams for Model 399 Sensors15Wiring Diagrams for Model 397 Sensors15Wiring Diagrams for Model 396R Sensors15Wiring Diagrams for Model 396P Sensors16Wiring Diagrams for Model 396 Sensors16Wiring Diagrams for Model 389 Sensors16Wiring Diagrams for Model 385+ Sensors17Wiring Diagrams for Model 381+ Sensors17Wiring Diagrams for Model 381pHE and 381pH Sensors17Wiring Diagrams for Model 328A Sensors17Wiring Diagrams for Model 320HP Sensors17before removing BNC and terminating cable18399-09-10-62, 381pH-30-42, and 381pHE-31-42 as received18389-02-50, and 389-02-54 before removing BNC and terminating cable19Functions for Models 397-54-62, 396-54-62, and 389-02-54-62 as received19to the Transmitter19Wiring Through a Remote Junction Box to the Transmitter19396P-02-54, 396P-02-55, 385+-04, and 381+-41-5220396P-02-55, 385+-04, and 381+-41-52. Wiring Directly to the Transmitter20Mounted Junction Box to the Transmitter20Wire Functions for Model 385+-0222Wiring Diagram for Model 385+-0222Wire Functions for Model 328A-0723Wiring Diagram for Model 328A23Wiring Diagram for Model 320HP-10-5524Wiring Diagram for Model 320HP-10-5824Wire Functions for Model 399-3325Wiring Diagram for Model 399-3325Connection to the Model 3081 pH/ORP Transmitter263-24 Preparation of Raw Connecting Cable (PN 9200273)27INTRINSICALLY SAFE AND EXPLOSION PROOF31Intrinsically Safe Installations31Explosion Proof Installations31Intrinsically Safe BASEEFA Model 3081 pH/ORP Label31FMRC Installation for Model 3081 pH/ORP Transmitter32CSA Installation for Model 3081 pH/ORP Transmitter34Explosion-Proof Installation for Model 3081 pH/ORP Transmitter36OPERATION WITH REMOTE CONTROLLER37Displays37Process Display Screen37Program Display Screen37Infrared Remote Controller (IRC)38Infrared Remote Controller38Menu Tree - pH39Diagnostic Messages - pH39Menu Tree for pH39Menu Tree - ORP40Diagnostic Messages - ORP40Menu Tree for ORP40Security41OPERATION WITH MODEL 27542Note on Model 275 HART Communicator42Connecting the HART Communicator42Connecting the HART Communicator42Operation43Menu Tree for pH (HART)44Menu Tree for ORP (HART)46CALIBRATION OF pH MEASUREMENTS48General48Entering and Leaving the Calibrate Menu48Using the Hold Function48Temperature Calibration49Auto Calibration50Manual Calibration52Making the Transmitter Reading Match a Second pH Meter (Standardization)54PROGRAMMING FOR pH MEASUREMENTS56General56Entering and Leaving the Program Menu56pH Settings List57tESt 3.80 to 22 mA 12.00 mA57Output Ranging58Diagnostic Parameters60Suggested Glass Impedance Warning and Failure Limits60Electrodes61Temperature Related Settings64Display Units66Buffer Calibration Parameters67pH Values are Defined67which pH Values are Defined68Isopotential Parameters69Generating a Test Current71CALIBRATION OF ORP MEASUREMENTS72General72Entering and Leaving the Calibrate Menu72Using the Hold Function72Temperature Calibration73Standardization74PROGRAMMING FOR ORP MEASUREMENTS75General75Entering and Leaving the Program Menu75ORP Settings List76tESt 3.80 to 22.00 mA 12.00 mA76Output Ranging77Diagnostic Parameters79Electrode79Temperature Element82Display Units83Generating a Test Current84MAINTENANCE85Overview85Transmitter Maintenance8511-1 Exploded View of Model 3081 pH/ORP Transmitter85pH Sensor Maintenance86Replacement Parts for Model 3081 pH Transmitter86ORP Sensor Maintenance8711-2 Checking the Potential of the Reference Electrode87Calibration88TROUBLESHOOTING89Warning and Fault Messages8912-1 Warning Annunciation8912-2 Fault Annunciation89Calibration Errors90Troubleshooting - General90Troubleshooting When a Diagnostic Message is Showing9012-3 Three-Wire RTD96RTD Resistance Values9612-4 Temperature Simulation into the Model 3081 pH/ORP Transmitter97Troubleshooting When No Diagnostic Message is Showing102Systematic Troubleshooting107Remote Junction Box10812-6 Troubleshooting Flow Chart/Preamplifier in Transmitter or Built into Sensor109Displaying Diagnostic Variables110Testing the Transmitter by Simulating pH11012-7 pH Simulation When the Preamplifier is Located in the Transmitter111in a Sensor-Mounted Junction Box11112-9 Simulate pH Through Model 381+ Sensor Preamplifier112Factory Assistance and Repairs113pH MEASUREMENTS114General11413-1 pH Measurement Cell114Measuring Electrode115Reference Electrode11513-2 Measuring Electrode (pH)11513-3 Cross-Section Through the pH Glass115Liquid Junction Potential116Converting Voltage to pH11613-4 Reference Electrode11613-5 The Origin of Liquid Junction Potential116Glass Electrode Slope117Buffers and Calibration11713-6 Glass Electrode Slope117Isopotential pH118Junction Potential Mismatch11813-7 Two-Point Buffer Calibration118Sensor Diagnostics119Shields, Insulation, and Preamplifiers11913-8 Liquid Junction Potential Mismatch119ORP MEASUREMENTS120General12014-1 ORP Measurement Cell120Measuring Electrode121Reference Electrode121Liquid Junction Potential12114-2 Measuring Electrode (ORP)12114-3 Reference Electrode121Relating Cell Voltage to ORP122ORP, Concentration, and pH12214-4 The Origin of Liquid Junction Potential12214-5 Electrode Potential122Interpreting ORP Measurements12314-6 ORP Measurement Interpretation123Calibration124THEORY - REMOTE COMMUNICATIONS126Overview of HART Communications126HART Interface Devices12615-1 HART Communications126AMS Communication12715-2 AMS Main Menu Tools127GLOSSARY128RETURN OF MATERIAL134Size: 1.64 MBPages: 150Language: EnglishOpen manual
