Emerson Process Management 3081 pH/ORP instruction manual

Model 3081 pH/ORP

Smart Two-Wire Microprocessor Transmitter

Instruction Manual

PN 51-3081pH/rev.D

August 2002

Contents

Main ESSENTIAL INSTRUCTIONS READ THIS PAGE BEFORE PROCEEDING! CAUTION WHAT YOU NEED TO KNOW BEFORE INSTALLING AND WIRING A ROSEMOUNT ANALYTICAL SENSOR TO THE MODEL 3081 pH/ORP TRANSMITTER If resistance is . . . the RTD is . . . about 110 ohms Pt 100 about 3000 ohms Balco 3K CAN YOU USE THE QUICK START GUIDE ON THE FOLLOWING PAGE? QUICK START GUIDE FOR MODEL 3081pH/ORP FIGURE 1 Section 1.2 Setup for Sensor Models 381+-55, 385+-03, and 396P-01-55 without a junction box FIGURE 2 FIGURE 3 FIGURE 4 Section 3 Power up and Calibration Section 4 Output (OPTIONAL) QUICK REFERENCE GUIDE MODEL 3081PH/ORP HART Communicator Fast Key Sequences MODEL 3081 PH/ORP MICROPROCESSOR TRANSMITTER TABLE OF CONTENTS Page Page LIST OF FIGURES TABLE OF CONTENTS - CONTD LIST OF FIGURES - CONTD LIST OF TABLES SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 1.2 ACCESSORIES Year 2000 Compliance: Millennium Status 1.3 SPECIFICATIONS -GENERAL FOR MODEL 3081 pH/ORP 1.6 ORDERING INFORMATION 1.4 SPECIFICATIONS - pH 1.5 SPECIFICATIONS - ORP MODEL 3081 pH/ORP TRANSMITTER-SENSOR COMPATIBILITYCHART ACCESSORIES SECTION 2.0 INSTALLATION Page 40308110 H 40008125 A Page Page 40308122 B SECTION 3.0 WIRING 3.1 General Information 3.2 Wiring Diagrams 3.2 WIRING DIAGRAMS FOR pH and ORP SENSORS Page Page 18 19 Page Page Page Page 24 FIGURE 3-19. Wiring diagram for Model 320HP-10-55. FIGURE 3-20 Wiring diagram for Model 320HP-10-58. Page Page Page Page Page Page Page Page Page Page Page Page SECTION 5.0 OPERATION WITH REMOTE CONTROLLER 7.00 CALIbrAtE 5.1 DISPLAYS 5.2 INFRARED REMOTE CONTROLLER (IRC) - KEY FUNCTIONS MENU Sub-menu 5.3 MENU TREE - pH 5.4 DIAGNOSTIC MESSAGES - pH 5.5 MENU TREE - ORP 1400 5.6 DIAGNOSTIC MESSAGES - ORP MENU Sub-menu 5.7 SECURITY I d 000 SECTION 6.0 OPERATION WITH MODEL 275 6.3 Operation Page Page Page Page SECTION 7.0 CALIBRATION OF pH MEASUREMENTS 7.4 TEMPERATURE CALIBRATION 50 7.5 AUTO CALIBRATION 7.5.1 Purpose 7.5.2 What Happens During Auto Calibration? 7.5.3 Use of Calibration Standards (buffers) 10.00 4.00 7.6 MANUAL CALIBRATION 52 7.6.1 Purpose 7.6.2 Use of calibration standards (buffers) 4.00 10.00 7.7 MAKING THE TRANSMITTER READING MATCH ASECOND pH METER (STANDARDIZATION). 08.00 59.00 SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 57 TABLE8-1. pH Settings List 8.3 OUTPUT RANGING Page 8.4 DIAGNOSTIC PARAMETERS Page Page rFH 1400 rWJH 0040 rWJL 8.5 TEMPERATURE RELATED SETTINGS tC 100-33 tAUtO ON tMAn 8.6 DISPLAYUNITS OUtPUt 000 CUR CODE 8.7 BUFFER CALIBRATION PARAMETERS bAUtO On 00.02 bUFFEr tIME 8.8 ISOPOTENTIAL PARAMETERS Snr 07.00 ISOPOtntAL 07.00 tCOEFF tESt 12.00 SIM OOUtPUt 8.9 GENERATING ATEST CURRENT SECTION 9.0 CALIBRATION OF ORP MEASUREMENTS tEMP AAdJ tEMP 9.4 TEMPERATURE CALIBRATION 1400 9.5 Standardization SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS 76 TABLE10-1. ORP Settings LIst 10.3 OUTPUT RANGING Page 79 10.4 DIAGNOSTIC PARAMETERS 10.4.1 Purpose 10.4.2 Definitions FIGURE 10-1. Suggested Warning and Failure Limits for Low Impedance Reference Electrodes FIGURE 10-2. Suggested Glass Impedance Warning and Failure Limits for a Glass Reference Electrode Page rWJL rFL rWJH 0040 10.5 TEMPERATURE ELEMENT tC 100-33 Page tESt 12.00 SIM OOUtPUt 10.7 GENERATING ATEST CURRENT SECTION 11.0 MAINTENANCE 11.3 pH SENSOR MAINTENANCE 87 11.3.3 Checking the Reference Electrode. 11.3.4 Rejuvenating Reference Electrodes Page SECTION 12.0 TROUBLESHOOTING 12.2 CALIBRATION ERRORS 12.3 TROUBLESHOOTING - GENERAL 12.4 TROUBLESHOOTING WHEN ADIAGNOSTIC MESSAGE IS SHOWING Page Page Page Page Page Page Page Page Page Page Page 12.5 TROUBLESHOOTING WHEN NO DIAGNOSTIC MESSAGE IS SHOWING Page Page Page Page 12.6 SYSTEMATIC TROUBLESHOOTING 108 109 FIGURE 12-6. Troubleshooting Flow Chart / Preamplifier in Transmitter or Built into Sensor 12.7 DISPLAYING DIAGNOSTIC VARIABLES 12.8 TESTING THE TRANSMITTER BY SIMULATING THE pH. Page 40381+05 A 12.9 FACTORYASSISTANCE AND REPAIRS SECTION 13.0 pH MEASUREMENTS 13.2 MEASURING ELECTRODE 13.3 REFERENCE ELECTRODE 13.4 LIQUID JUNCTION POTENTIAL 13.5 CONVERTING VOLTAGE TO pH 13.6 GLASS ELECTRODE SLOPE 13.7 BUFFERS AND CALIBRATION 13.8 ISOPOTENTIAL pH 13.9 JUNCTION POTENTIAL MISMATCH 13.10 SENSOR DIAGNOSTICS 13.11 SHIELDS, INSULATION, AND PREAMPLIFIERS SECTION 14.0 ORP MEASUREMENTS Page Page n 1 ORP, mV Chromium (VI), ppm 14.8 CALIBRATION 6 2 Page 15.1 OVERVIEW OF HART COMMUNICATION 15.2 HART INTERFACE DEVICES SECTION 15.0 THEORY - REMOTE COMMUNICATIONS 15.1 Overview of HART Communications 15.2 HART Interface Devices 15.3 AMS Communication 15.3 ASSET MANAGEMENT SOLUTIONS TERM DEFINITION SECTION 16.0 GLOSSARY Page Page Page Page Page SECTION 17.0 RETURN OF MATERIAL Page http://www.raihome.com