Instruction manual

ManualsBrandsEmerson ManualsConsumer electronicsSolu Comp Xmt-P-FF/FI

Model 5081-P

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Summary of content (156 pages)

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Instruction Manual PN 51-5081P/rev.
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ESSENTIAL INSTRUCTIONS READ THIS PAGE BEFORE PROCEEDING! Rosemount Analytical designs, manufactures, and tests its products to meet many national and international standards. Because these instruments are sophisticated technical products, you must properly install, use, and maintain them to ensure they continue to operate within their normal specifications.
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MODEL 5081-P pH/ORP TABLE OF CONTENTS MODEL 5081-P pH/ORP TwO-wIRE TRANSMITTER TABLE OF CONTENTS Section 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 Title DESCRIPTION AND SPECIFICATIONS ................................................................ Features and Applications........................................................................................ Specifications...........................................................................................................
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MODEL 5081-P pH/ORP TABLE OF CONTENTS TABLE OF CONTENTS CONT’D 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 CALIBRATION OF pH MEASUREMENTS ............................................................. General .................................................................................................................... Entering and Leaving the Calibrate Menu................................................................ using the Hold Function....................................................................
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MODEL 5081-P pH/ORP TABLE OF CONTENTS TABLE OF CONTENTS CONT’D 12.0 12.1 12.2 12.3 12.4 12.5 12.6 12.7 12.8 TROUBLESHOOTING ........................................................................................... Warning and Fault Messages .................................................................................. Calibration Errors ..................................................................................................... Troubleshooting - General ....................................
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MODEL 5081-P pH/ORP TABLE OF CONTENTS LIST OF FIGURES Number 1-1 1-2 1-3 1-4 1-5 2-1 2-2 2-3 2-4 2-5 2-6 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 3-10 3-11 3-12 3-13 3-14 3-15 3-16 3-17 Title Page Transmitter display during Calibration and Programming ....................................... 5 infrared Remote Controller....................................................................................... 5 Configuring Model 5081 Transmitter with FOuNdATiON Fieldbus .............................
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MODEL 5081-P pH/ORP TABLE OF CONTENTS LIST OF FIGURES - CONT’D Number 3-18 3-19 3-20 3-21 4-1 4-2 4-3 4-4 4-5 4-6 4-7 4-8 4-9 4-10 4-11 4-12 4-13 4-14 4-15 4-16 4-17 4-18 4-19 5-1 5-2 5-3 5-4 5-5 5-6 5-7 5-8 6-1 6-2 8-1 8-2 8-3 10-1 10-2 11-1 12-1 12-2 12-3 12-4 12-5 12-6 Title Wiring diagram for Model 320HP-10-55 .................................................................. Wiring diagram for Model 320HP-10-58 ..................................................................
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MODEL 5081-P pH/ORP TABLE OF CONTENTS LIST OF FIGURES - CONT’D 12-7 13-1 13-2 13-3 13-4 13-5 13-6 13-7 13-8 14-1 14-2 14-3 14-4 14-5 14-6 15-1 15-2 Simulate pH Through Model 381+ Sensor Preamplifier ........................................... pH Measurement Cell............................................................................................... Measuring Electrode (pH) ........................................................................................ Cross-Section Through the pH Glass...
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MODEL 5081-P pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS SECTION 1.0 DESCRIPTION AND SPECIFICATIONS • CHOiCE OF COMMuNiCATiON PROTOCOL: HART® or FOuNdATiON Fieldbus. • LARGE, EASY-TO-REAd two-line display shows the process measurement and temperature. • SiMPLE MENu STRuCTuRE. • ROBuST NEMA 4X ENCLOSuRE. • iNTRiNSiCALLY SAFE dESiGN allows the transmitter to be used in hazardous environments (with appropriate safety barriers).
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MODEL 5081-P pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 1.2 SPECIFICATIONS 1.2.1 GENERAL SPECIFICATIONS Housing: Cast aluminum with epoxy coating. NEMA 4X (iP65). Neoprene O-ring cover seals. Dimensions: 160.5 mm x 175.3 mm x 161.3 mm (6.3 in. x 6.9 in. x 6.4 in.) See drawing. Conduit Openings: ¾-in. FNPT Ambient Temperature: -4 to 149°F (-20 to 65°C) Storage Temperature: -22 to 176°F (-30 to 80°C) Relative Humidity: 0 to 95% (non-condensing) weight/Shipping weight: 10 lb/10 lb (4.5/5.
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MODEL 5081-P pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS Accuracy: ± 1 mV @ 25°C ± 0.01 pH Repeatability: ± 1 mV @ 25°C ± 0.01 pH Stability: 0.
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MODEL 5081-P pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 1.4 TRANSMITTER DISPLAy DURING CALIBRATION AND PROGRAMMING (FIGURE 1-1) 1. Continuous display of pH, ORP, conductivity, oxygen, chlorine, or ozone reading. 2. units: pH, mV, µS/cm, mS/cm, ppm, ppb, % saturation, or %. 3. Current menu section appears here. 4. Submenus, prompts, and diagnostic readings appear hear. 5. Commands available in each submenu or at each prompt appear here. 6. Hold appears when the transmitter is in hold. 7.
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MODEL 5081-P pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 1.6 FOUNDATION FIELDBUS Figure 1-3 shows a 5081-P-FF being used to measure and control pH and chlorine levels in drinking water. The figure also shows three ways in which Fieldbus communication can be used to read process variables and configure the transmitter. FIGURE 1-3. CONFIGURING MODEL 5081-P TRANSMITTER wITH FOUNDATION FIELDBUS 1.
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MODEL 5081-P pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS Power: • Two Wire device; Fieldbus Polarity insensitive • Current draw: 21 mA • device Certifications: iS / FiSCO • Maximum certified input Voltage for iS: 30V • Maximum certified input current for iS: 300mA • Maximum certified input power for iS: 1.3W • internal Capacitance (Ci): 0 nF • internal inductance (Li): 0 μH 1.8 HART COMMUNICATIONS 1.8.
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MODEL 5081-P pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 4-20 mA + digital 250 ohm Model 5081-P Two-wire Transmitter Control System Hand Held Communicator (“Configurator”) Bridge Computer FIGURE 1-4. HART Communicators. Both the Rosemount Model 375 (or 475) and a computer can be used to communicate with a HART transmitter. The 250 ohm load (minimum) must be present between the transmitter and the power supply. 1.
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MODEL 5081-P pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS FIGURE 1-5.
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MODEL 5081-P pH/ORP SECTION 2.0 INSTALLATION SECTION 2.0 INSTALLATION 2.1 2.2 2.3 2.4 2.5 Unpacking and Inspection Pre-Installation Set Up Orienting the Display Board Mechanical Installation Power Supply wiring 2.1 UNPACKING AND INSPECTION inspect the shipping container. if it is damaged, contact the shipper immediately for instructions. Save the box. if there is no apparent damage, remove the transmitter. Be sure all items shown on the packing list are present.
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MODEL 5081-P pH/ORP SECTION 2.0 INSTALLATION 2.2.3 Preamplifier Location pH sensors produce a high impedance voltage signal that must be preamplified before use. The signal can be preamplified before it reaches the transmitter or it can be preamplified in the transmitter. To work properly, the transmitter must know where preamplification occurs. Although ORP sensors produce a low impedance signal, the voltage from an ORP sensor is amplified the same way as a pH signal.
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MODEL 5081-P pH/ORP SECTION 2.0 INSTALLATION 2.3 ORIENTING THE DISPLAy BOARD The display board can be rotated 90 degrees, clockwise or counterclockwise, from the original position. To reposition the display: 1. Loosen the cover lock nut until the tab disengages from the circuit end cap. unscrew the cap. 2. Remove the three bolts holding the circuit board stack. 3. Lift and rotate the display board 90 degrees, clockwise or counterclockwise, into the desired position. 4.
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MODEL 5081-P pH/ORP 2.4.2 Mounting on a Flat Surface. See Figure 2-1. MILLIMETER INCH FIGURE 2-1. Mounting the Model 5081-P pH/ORP Transmitter on a Flat Surface 12 SECTION 2.
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MODEL 5081-P pH/ORP SECTION 2.0 INSTALLATION 2.4.3 Pipe Mounting. See Figure 2-2. The pipe mounting kit (PN 2002577) accommodates 1-1/2 to 2 in. pipe. MILLIMETER INCH dWG. NO. 40308104 REV. G dWG. NO. 40308103 REV. C FIGURE 2-2.
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MODEL 5081-P pH/ORP 2.5 SECTION 2.0 INSTALLATION POwER SUPPLy/CURRENT LOOP — MODEL 5081-P-HT 2.5.1 Power Supply and Load Requirements. Refer to Figure 2-3. The minimum power supply voltage is 12.5 Vdc and the maximum is 42.4 Vdc. The top line on the graph gives the voltage required to maintain at least 12.5 Vdc at the transmitter terminals when the output signal is 22 mA. The lower line is the supply voltage required to maintain a 30 Vdc terminal voltage when the output signal is 22 mA.
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MODEL 5081-P pH/ORP 2.6 SECTION 2.0 INSTALLATION POwER SUPPLy wIRING FOR MODEL 5081-P-FF 2.6.1 Power Supply wiring. Refer to Figure 2-5 and Figure 2-6. Run the power/signal wiring through the opening nearest terminals 15 and 16. use shielded cable and ground the shield at the power supply. To ground the transmitter, attach the shield to the grounding screw on the inside of the transmitter case. A third wire can also be used to connect the transmitter case to earth ground.
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MODEL 5081-P pH/ORP SECTION 3.0 wIRING SECTION 3.0 wIRING 3.1 3.2 General Information wiring Diagrams 3.1 GENERAL INFORMATION pH and ORP sensors manufactured by Rosemount Analytical can be wired to the Model 5081-P pH/ORP transmitter in three ways: 1. directly to the transmitter, 2. to a sensor-mounted junction box and then to the transmitter, 3. to a remote junction box and then from the remote junction box to the transmitter. The pH (or ORP) signal can also be preamplified in one of four places. 1.
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MODEL 5081-P pH/ORP SECTION 3.0 wIRING 3.2 wIRING DIAGRAMS Refer to Tables 3-1 through 3-11 to locate the appropriate wire function and wiring diagram. There is a separate table for each model. The sensor models having the highest number appear first. if you do not know the model number of the sensor, refer to the flow charts on pages 32 through 34. Only the model option numbers needed to select the correct wiring diagram are shown. Other numbers are not shown. For all other sensors, see sensor manual.
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MODEL 5081-P pH/ORP SECTION 3.
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MODEL 5081-P pH/ORP SECTION 3.
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MODEL 5081-P pH/ORP SECTION 3.0 wIRING REMOVE BNC ANd TERMiNATE COAXiAL CABLE BEFORE WiRiNG SENSOR TO TRANSMiTTER. SEE FiGuRE 3-23. ALTERNATiVELY, uSE A BNC AdAPTER (PN 9120531) OR ORdER MOdEL OPTiON -62 (SENSOR WiTH BNC REMOVEd ANd TERMiNATiONS COMPATiBLE WiTH 5081 pH/ORP). iF uSiNG A BNC AdAPTER, THE REd WiRE iS MV OR pH iN ANd THE BLACK WiRE iS REFERENCE iN. TO PREVENT SHORT CiRCuiTS TO THE TRANSMiTTER HOuSiNG, iNSuLATE THE BNC BY WRAPPiNG iT WiTH ELECTRiCAL TAPE. FIGURE 3-2.
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MODEL 5081-P pH/ORP SECTION 3.0 wIRING REMOVE BNC ANd TERMiNATE COAXiAL CABLE BEFORE WiRiNG SENSOR TO TRANSMiTTER. SEE FiGuRE 3-20. ALTERNATiVELY, uSE A BNC AdAPTER (PN 9120531) OR ORdER MOdEL OPTiON -62 (SENSOR WiTH BNC REMOVEd ANd TERMiNATiONS COMPATiBLE WiTH 5081 pH/ORP). iF uSiNG A BNC AdAPTER, THE REd WiRE iS MV OR pH iN ANd THE BLACK WiRE iS REFERENCE iN. TO PREVENT SHORT CiRCuiTS TO THE TRANSMiTTER HOuSiNG, iNSuLATE THE BNC WiTH BY WRAPPiNG iT WiTH ELECTRiCAL TAPE. FIGURE 3-6.
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MODEL 5081-P pH/ORP SECTION 3.0 wIRING FIGURE 3-10. wire functions for Models 396R-50, 396R-54, 396R-54-61, 396P-02-50, 396P-02-54, 396P-02-55, 385+ -04, and 385+ -41-52. dWG. NO. 405081P24 dWG. NO. 405081P18 REV. A FIGURE 3-11. wiring diagram for Models 396R-50, 396R-54, 396R-54-61, 396P-02-50, 396P-02-54, 396P-02-55, 385+ -04, and 385+ -41-52. wiring directly to the transmitter. 22 REV. A FIGURE 3-12.
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MODEL 5081-P pH/ORP SECTION 3.0 wIRING FIGURE 3-13. wire functions for Models 396P-01-55, 385+ -03, 381+ -40-55, and 381+ -43-55. dWG. NO. 405081P17 REV. A FIGURE 3-14. wiring diagram for Models 396P-01-55, 385+ -03, 381+ -40-55, and 381+ -43-55.
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MODEL 5081-P pH/ORP SECTION 3.0 wIRING dWG. NO. 405081P20 REV. A FIGURE 3-15. wire functions for Model 328A-07. dWG. NO. 405081P20 REV. A FIGURE 3-16. wiring diagram for Models 328A and 382+-02. dWG. NO. 45081P25 REV. A FIGURE 3-17. wiring diagram for Model 385+-02.
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MODEL 5081-P pH/ORP SECTION 3.0 wIRING dWG. NO. 405081P21 REV. A FIGURE 3-18. wiring diagram for Model 320HP-10-55. dWG. NO. 405081P15 REV. A FIGURE 3-19 wiring diagram for Model 320HP-10-58.
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MODEL 5081-P pH/ORP FIGURE 3-20. Procedure for Removing BNC Connector and Preparing Coaxial Cable 26 SECTION 3.
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MODEL 5081-P pH/ORP SECTION 3.0 wIRING FIGURE 3-21. Preparation of Raw Connecting Cable (PN 9200273).
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28 See Flowchart on page 30 SENSOR FLOw CHART (continued on page 31) See Flowchart on page 29 MODEL 5081-P pH/ORP SECTION 3.
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SENSOR FLOw CHART (continued on page 32) MODEL 5081-P pH/ORP SECTION 3.
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SECTION 3.
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MODEL 5081-P pH/ORP SECTION 4.0 INTRINSICALLy SAFE & ExPLOSION PROOF SECTION 4.
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MODEL 5081-P pH/ORP SECTION 4.0 INTRINSICALLy SAFE & ExPLOSION PROOF FIGURE 4-3. FM Explosion-Proof Installation for Model 5081-P-HT 4.
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SECTION 4.0 INTRINSICALLy SAFE & ExPLOSION PROOF FIGURE 4-4.
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FIGURE 4-5. FM Intrinsically Safe Installation for Model 5081-P-HT (1 of 2) MODEL 5081-P pH/ORP 34 SECTION 4.
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FIGURE 4-5. FM Intrinsically Safe Installation for Model 5081-P-HT (2 of 2) MODEL 5081-P pH/ORP SECTION 4.
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SECTION 4.0 INTRINSICALLy SAFE & ExPLOSION PROOF FIGURE 4-6.
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FIGURE 4-7. CSA Intrinsically Safe Installation for Model 5081-P-HT (1 of 2) MODEL 5081-P pH/ORP SECTION 4.
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FIGURE 4-7. CSA Intrinsically Safe Installation for Model 5081-P-HT (2 of 2) MODEL 5081-P pH/ORP 38 SECTION 4.
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SECTION 4.0 INTRINSICALLy SAFE & ExPLOSION PROOF FIGURE 4-8.
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MODEL 5081-P pH/ORP SECTION 4.0 INTRINSICALLy SAFE & ExPLOSION PROOF FIGURE 4-9. FM Explosion-Proof Installation for Model 5081-P-FF 4.
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SECTION 4.0 INTRINSICALLy SAFE & ExPLOSION PROOF FIGURE 4-10.
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FIGURE 4FIGURE 4-11. FM Intrinsically Safe Installation for Model 5081-P-FF (1 of 2) MODEL 5081-P pH/ORP 42 SECTION 4.
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FIGURE 4FIGURE 4-11. FM Intrinsically Safe Installation for Model 5081-P-FF (2 of 2) MODEL 5081-P pH/ORP SECTION 4.
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SECTION 4.0 INTRINSICALLy SAFE & ExPLOSION PROOF FIGURE 4-12.
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FIGURE 4-13. CSA Intrinsically Safe Installation for Model 5081-P-FF (1 of 2) MODEL 5081-P pH/ORP SECTION 4.
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FIGURE 4-13. CSA Intrinsically Safe Installation for Model 5081-P-FF (2 of 2) MODEL 5081-P pH/ORP 46 SECTION 4.
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SECTION 4.0 INTRINSICALLy SAFE & ExPLOSION PROOF FIGURE 4-14.
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48 APPROVED MATERIAL: AISI 300 SERIES STAINLESS STEEL .015+/-.005 THICK. MATERIAL TO BE ANNEALED & PASSIVATED. MAXIMUM HARDNESS BRINELL 190. 1 FINISH ANGLES TOLERANCES + 1/2 - 4 1 DIMENSIONS ARE IN INCHES REMOVE BURRS & SHARP EDGES .020 MAX MACHINED FILLET RADII .020 MAX NOMINAL SURFACE FINISH 125 MATERIAL .XXX + .030 +- .010 UNLESS OTHERWISE SPECIFIED .XX LTR PART NO A REV THIS DWG CREATED IN SOLID EDGE PROJECT ENGR APVD J. FLOCK J. FLOCK B. JOHNSON APPROVALS CHECKED DRAWN ITEM 2.
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A B C D REV REV REV REV REV REV B NOTES: UNLESS OTHERWISE SPECIFIED 8 +PH SENSOR PREAMP (NOTE 2) 7 MODEL 5081-P-FI XMTR MODEL 5081-P-FI XMTR MODEL 5081-P-FI XMTR MODEL 5081-P-FI XMTR 6 5 TO PREVENT IGNITION OF FLAMMABLE OR COMBUSTIBLE ATMOSPHERES, DISCONNECT POWER BEFORE SERVICING. SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY OR SUITABILITY FOR DIVISION 2. 3 4 RELEASE DATE 5-6-04 ECO NO.
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50 A B 6 8 NOTES: UNLESS OTHERWISE SPECIFIED 7 6 (La/Ra OR Lo/Ro) 5 5 TABLE I 25 5.99 TABLE III Vmax (Vdc) 17.5 17.5 GROUPS IIB/ C,D,E,F,G IIC/ A,B,C,D,E,F,G MODEL NO. 5081-P-FI 5081-P-FI 4 3 360 380 Imax (mA) 3 2.52 5.32 5 5 10 10 Li (uH) 147 mW Pt Ci (nF) 105.64 mA It Pmax (W) 13.02 Vdc Vt MODEL 5081-P-FI TB1-1 THRU 12 TABLE II OUTPUT PARAMETERS 5081-P-FI FISCO PARAMETERS SUPPLY / SIGNAL TERMINALS TB 1-15, 16 3.1 12.3 0.96 21.
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R SA R LR34186 ENCLOSURE 4 NO CHANGE WITHOUT CSA APPROVAL. MATERIAL: AISI 300 SERIES STAINLESS STEEL .015+/-.005 THICK. MATERIAL TO BE ANNEALED & PASSIVATED. MAXIMUM HARDNESS BRINELL 190. 2. 1 NOTES: UNLESS OTHERWISE SPECIFIED .XXX .XX FINISH ANGLES TOLERANCES + 1/2 - 4 1 DIMENSIONS ARE IN INCHES REMOVE BURRS & SHARP EDGES .020 MAX MACHINED FILLET RADII .020 MAX NOMINAL SURFACE FINISH 125 + .030 +- .010 A REV LTR ECO PART NO THIS DWG CREATED IN SOLID EDGE PROJECT ENGR APVD J. FLOCK J.
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A B C D REV REV REV REV REV REV A 8 PREAMP (NOTE 3) 7 6 MODEL 5081-P-FI XMTR MODEL 5081-P-FI XMTR 6 MODEL 5081-P-FI XMTR MODEL 5081-P-FI XMTR 5 6 5 TO PREVENT IGNITION OF FLAMMABLE OR COMBUSTIBLE ATMOSPHERES, DISCONNECT POWER BEFORE SERVICING. ECO NO.
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A B 6 8 NOTES: UNLESS OTHERWISE SPECIFIED 7 5 5081-P-FI 4 17.5 Vmax (Vdc) 380 Imax (mA) 5081-P-FI ENTITY PARAMETERS SUPPLY / SIGNAL TERMINALS TB 1-15, 16 3 3 5.32 27.8 Ci (nF) 0 Li (mH) 147 mW Pt Pmax (W) 13.02 Vdc 105.64 mA It MODEL 5081-P-FF TB1-1 THRU 12 TABLE II Vt OUTPUT PARAMETERS FIGURE 4-18. CSA Intrinsically Safe Installation for Model 5081-P-FI (2 of 2) 6 1. THE MODEL 5081-A-FI TRANSMITTER INCLUDES INTEGRAL PREAMPLIFIER CIRCUITRY.
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54 II 1 G NO CHANGE WITHOUT BASEEFA APPROVAL. MATERIAL: AISI 300 SERIES STAINLESS STEEL .015+/-.005 THICK. MATERIAL TO BE ANNEALED & PASSIVATED. MAXIMUM 1 NOTES: UNLESS OTHERWISE SPECIFIED RELEASE DATE FINISH ANGLES TOLERANCES + 1/2 - 4 1 DIMENSIONS ARE IN INCHES REMOVE BURRS & SHARP EDGES .020 MAX MACHINED FILLET RADII .020 MAX NOMINAL SURFACE FINISH 125 + .030 +- .010 MATERIAL .XXX .XX 2.56 ±.02 8925 ECO NO A REV LTR ECO PART NO J.
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MODEL 5081-P pH/ORP SECTION 5.0 OPERATION wITH REMOTE CONTROLLER SECTION 5.0 OPERATION wITH INFRARED REMOTE CONTROLLER 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 Overview Displays Infrared Remote Controller (IRC) - Key Functions Menu Tree - pH Diagnostic Messages - pH Menu Tree - ORP Diagnostic Messages - ORP Security 5.1 OvERvIEw This section covers basic transmitter operation and software functionality.
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MODEL 5081-P pH/ORP SECTION 5.0 OPERATION wITH REMOTE CONTROLLER 5.1.1 Software Functionality. The Model 5081-P pH/ORP software is designed to permit remote testing and configuration of the transmitter using the Fisher-Rosemount deltaV Fieldbus Configuration Tool, or other FOuNdATiON fieldbus compliant host. 5.1.2 Transducer Block. The transducer block contains the actual measurement data.
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MODEL 5081-P pH/ORP SECTION 5.0 OPERATION wITH REMOTE CONTROLLER 5.3 INFRARED REMOTE CONTROLLER (IRC) - KEy FUNCTIONS The infrared remote controller is used to calibrate and program the transmitter and to read diagnostic messages. See Figure 5-4 for a description of the function of the keys. RESET - Press to end the current operation and return to the process display. Changes will NOT be saved. RESET does not return the transmitter to factory default settings.
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MODEL 5081-P pH/ORP SECTION 5.0 OPERATION wITH REMOTE CONTROLLER 5.4 MENU TREE - pH The Model 5081-P pH transmitter has three menus: CALiBRATE, PROGRAM, and diAGNOSE. under the Calibrate and Program menus are several sub-menus. For example, under CALiBRATE, the sub-menus are CALIbrAtE, Std (standard), and tEMP AdJ (temperature adjust). under each sub-menu are prompts. For example, under Std, the prompts are Std xx.xx and slope xx.xx. The diAGNOSE menu lets the user view diagnostic messages.
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MODEL 5081-P pH/ORP SECTION 5.0 OPERATION wITH REMOTE CONTROLLER PROGRAM CALIBRATE CALIbrAtE Std tEMP AdJ CAL bF1 Std 7.00 tEMP 25.0 bF 1 SLOPE 59.01 InPut 58.9 DIAGNOSE SLOPE OFFSt GIMP 1000 rIMP 10 5081-P-FF SoFt HArd FAULtS nonE bF1 4.01 CAL bF2 bF 2 bF2 10.01 tEMP dISPLAy bUFFEr rOFFSt 060 tAutO On tYPE PH bAutO On tCOEF 00.00 diAG OFF tMAn 25.0 dIAGnOStIC ISOPOtntAL LinE FrEq tEMP C buFFEr Std iSO 07.00 iMPtC ON OutPut Cur StAbiLiSE Snr 07.
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MODEL 5081-P pH/ORP SECTION 5.0 OPERATION wITH REMOTE CONTROLLER 5.6 MENU TREE - ORP The Model 5081-P ORP transmitter has three menus: CALiBRATE, PROGRAM, and diAGNOSE. under the Calibrate and Program menus are several sub-menus. For example, under CALiBRATE, the sub-menus are Std (standard) and tEMP AdJ (temperature adjust). under each sub-menu are prompts. For example, the Std sub-menu contains the single prompt Std. Other sub-menus may contain more than one prompt.
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MODEL 5081-P pH/ORP SECTION 5.0 OPERATION wITH REMOTE CONTROLLER 1400 mV PROGRAM CALIBRATE Std tEMP ADj Std 1000 tEMP 25.0 DIAGNOSE OFFSt 120 rIMP 10 5081-P-FF SoFt 00.02 HArd 01 FAULtS nonE dIAGnOStIC dISPLAy LinE FrEq rOFFSt 060 tYPE ORP LinE 60 diAG OFF tEMP C iMPtC OFF OutPut Cur rEF LO COdE 000 dEFAULt PAMP=trAnS FActOrY nO YES rFH 140 MENU Sub-menu rWH 040 PROMPT rWL 000 rFL 000 diag Message FIGURE 5-8.
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MODEL 5081-P pH/ORP SECTION 5.0 OPERATION wITH REMOTE CONTROLLER 5.8 SECURITy 5.8.1 General. use the programmable security code to protect program and calibration settings from accidentally being changed. The transmitter is shipped with the security feature disabled. To program a security code, refer to Section 8.6, display units. 5.8.2 Entering the Security Code. PROGRAM Id EXiT 000 ENTER 1.
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MODEL 5081-P pH/ORP SECTION 6.0 OPERATION wITH MODEL 375 SECTION 6.0 OPERATION wITH MODEL 375 6.1 Note on Model 375 or 475 Communicator The Model 375 or 475 Communicator is a product of Emerson Process Management, Rosemount inc. This section contains selected information on using the Model 375 or 475 with the Rosemount Analytical Model 5081-P-HT Transmitter. For complete information on the Model 375 or 475 Communicator, see the Model 375 or 475 instruction manual.
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MODEL 5081-P pH/ORP SECTION 6.0 OPERATION wITH MODEL 375 6.3 Operation 6.3.1 Off-line and On-line Operation The Model 375 Communicator features off-line and on-line communications. On-line means the communicator is connected to the transmitter in the usual fashion. While the communicator is on line, the operator can view measurement data, change program settings, and read diagnostic messages. Off-line means the communicator is not connected to the transmitter.
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MODEL 5081-P pH/ORP SECTION 6.
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MODEL 5081-P pH/ORP diagnostic Vars Oxygen Snsr Cur Sensitivity Zero Current pH Value # pH mV # pH Slope # pH Zero Offset # Gi # Temp Temp Res Noise rejection Basic setup Tag PV Range Values PV LRV PV uRV PV PV % rnge device information distributor Model dev id Tag date Write protect Snsr text descriptor Message Revision #'s universal rev Fld dev rev Software rev Hardware rev detailed setup Sensors Oxygen * Oxygen unit [ppm, ppb, %sat, mmHg, inHg, atm, kPa, mbar, bar] *, ***** Oxygen Sensor [AdO, TRdO, SSd
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MODEL 5081-P pH/ORP SECTION 6.0 OPERATION wITH MODEL 375 pH # pH Value pH Comp [Auto, Manual] Manual pH Preamp loc [Sensor, Xmtr] Autocal [Manual, Standard, diN 19267, ingold, Merck] pH Slope pH SST pH SSS pH Zero Offset Limit pH diagnostics diagnostics [Off, On] GFH GFL imped Comp [Off, On] Temperature Temp Comp [Auto, Manual] Man.
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MODEL 5081-P pH/ORP SECTION 6.0 OPERATION wITH MODEL 375 device information distributor Model dev id Tag date Write protect Snsr text descriptor Message Revision #'s universal rev Fld dev rev Software rev Hardware rev Local display AO LOi units [mA, %] LOi cfg code LOi cal code Noise rejection Load default Conf.
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MODEL 5081-P pH/ORP SECTION 7.0 CALIBRATION OF pH MEASUREMENTS SECTION 7.0 CALIBRATION OF pH MEASUREMENTS 7.1 7.2 7.3 7.4 7.5 7.6 7.7 General Entering and Leaving the Calibrate Menu Using the Hold Function Temperature Calibration Auto Calibration Manual Calibration Making the Transmitter Reading Match a Second pH Meter (Standardization) 7.1 GENERAL The Calibrate menu allows the user to calibrate the pH and temperature response of the sensor. The transmitter does a two-point pH calibration.
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MODEL 5081-P pH/ORP SECTION 7.0 CALIBRATION OF pH MEASUREMENTS 7.4 TEMPERATURE CALIBRATION 7.4.1 Purpose 1. As discussed in Section 13.6, Glass Electrode Slope, measuring temperature is an important part of measuring pH. The accuracy of a new sensor and transmitter loop is about ±1°C, which is adequate for most applications. A new sensor seldom requires temperature calibration. 2. Calibrate the sensor/transmitter loop if . . . a. ±1°C accuracy is NOT acceptable, or b.
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MODEL 5081-P pH/ORP SECTION 7.0 CALIBRATION OF pH MEASUREMENTS 7.5 AUTO CALIBRATION 7.5.1 Purpose 1. 2. 3. New sensors must be calibrated before use. Regular recalibration is also necessary. The use of auto calibration instead of manual calibration is strongly recommended. Auto calibration avoids common pitfalls and reduces errors. For more information about calibration in pH measurements and the use of buffers, refer to Section 8.7, Buffers and Calibration. 7.5.
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MODEL 5081-P pH/ORP SECTION 7.0 CALIBRATION OF pH MEASUREMENTS NOTE A transmitter adjacent to the one being calibrated may pick up signals from the iRC. To avoid accidentally changing settings, use a different security code for each nearby transmitter. See Section 5.8, Security. NOTE during calibration, the sensor may be exposed to solutions having pH outside the normal range of the process.
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MODEL 5081-P pH/ORP SECTION 7.0 CALIBRATION OF pH MEASUREMENTS 7.6 MANUAL CALIBRATION 7.6.1 Purpose 1. 2. 3. 4. 5. New sensors must be calibrated before use. Regular recalibration is also necessary. Manual calibration is an alternative to auto calibration. Because auto calibration eliminates many common calibration errors, it is strongly recommended. in auto calibration, the transmitter recognizes the buffer and uses the temperature-corrected pH value in the calibration.
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MODEL 5081-P pH/ORP SECTION 7.0 CALIBRATION OF pH MEASUREMENTS NOTE A transmitter adjacent to the one being calibrated may pick up signals from the iRC. To avoid accidentally changing settings, use a different security code for each nearby transmitter. See Section 5.8, Security. NOTE during calibration, the sensor may be exposed to solutions having pH outside the normal range of the process.
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MODEL 5081-P pH/ORP SECTION 7.0 CALIBRATION OF pH MEASUREMENTS 7.7 MAKING THE TRANSMITTER READING MATCH A SECOND pH METER (STANDARDIzATION). 7.7.1 Purpose 1. This section describes how to make the transmitter reading match the reading from a second pH meter. The measurement made with the second meter is called the standard pH (pHstd). The process of making the two readings agree is called standardization. 2. This section also describes how to enter an independently determined slope into the transmitter.
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MODEL 5081-P pH/ORP SECTION 7.0 CALIBRATION OF pH MEASUREMENTS NOTE A transmitter adjacent to the one being calibrated may pick up signals from the iRC. To avoid accidentally changing settings, use a different security code for each nearby transmitter. See Section 5.8, Security. 7.7.3 Procedure CALiBRATE 1. Enter the CALiBRATE menu by pressing CAL on the iRC. The CALibrAtE sub-menu appears (pictured above left). Std EXiT NEXT ENTER 3. With the Std sub-menu displayed, press ENTER.
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MODEL 5081-P pH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 General Entering and Leaving the Program Menu Output Ranging Diagnostic Parameters Temperature Related Settings Display Units Buffer Calibration Parameters Isopotential Parameters Generating a Test Current 8.1 GENERAL This section describes how to do the following: 1. assign pH values to the 4 and 20 mA outputs (for Model 5081-P-HT only), 2.
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MODEL 5081-P pH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS TABLE 8-1. pH Settings List ITEM PROGRAM LEvEL (Sections 8.0 - 8.9). A. Output Range (Section 8.3) (for 5081-P-HT only) 1. 4 mA Output 2. 20 mA Output: 3. Hold 4. dampening 5. Fault Current Output Setting DISPLAy LIMITS HOLd dPn FAuLt B. Diagnostic (Section 8.4) 1. Reference Cell Offset (Standardize error) diAgnOStiC rOFFSt 0 to 1000 mV 2. diagnostics Function 3. Glass impedance Temperature Correction 4.
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MODEL 5081-P PH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 8.3 OUTPUT RANGING 8.3.1 Purpose This section describes how to do the following: 1. assign pH values to the 4 and 20 mA outputs, 2. set the output current generated by the transmitter during hold, 3. set the output current generated by the transmitter when a fault is detected, 4. control the amount of dampening on the output signal. 8.3.2 Definitions 1. CuRRENT OuTPuTS.
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MODEL 5081-P pH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 8.4 DIAGNOSTIC PARAMETERS 8.4.1 Purpose This section describes how to do the following: 1. change the standardization or reference offset, 2. enable and disable sensor diagnostics, 3. enable and disable glass impedance temperature compensation, 4. set the high and low warning and failure limits for the glass electrode. 5. set the high and low warning and failure limits for the reference electrode. 8.4.2 Definitions 1.
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MODEL 5081-P pH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 4. REFERENCE iMPEdANCE. The majority of reference electrodes used in industry are low impedance silver-silver chloride electrodes. Every pH and ORP sensor manufactured by Rosemount Analytical has a low impedance reference. However, there are applications that call for either a high impedance sodium or pH glass reference electrode. Both high impedance and low impedance reference electrodes can be used with the Model 5081-P pH/ORP transmitter.
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MODEL 5081-P pH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 8.4.3 Procedure PROGRAM 1. Press PROG on the infrared remote controller (iRC). dIAGnOSTIC EXiT NEXT ENTER PROGRAM rOFFSt 060 EXiT ENTER PROGRAM dIAG OFF EXiT IMPtC ON NEXT ENTER PROGRAM GFH 1500 EXiT ENTER PROGRAM GWJH 1000 EXiT ENTER PROGRAM GWJL 0020 EXiT ENTER PROGRAM GFL 0010 EXiT ENTER PROGRAM CAL 000 EXiT ENTER PROGRAM rEF EXiT 3. The screen displays the rOFFSt prompt.
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MODEL 5081-P pH/ORP PROGRAM rFH EXiT 1400 NEXT SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 12. The rFH prompt appears. use the editing keys to change the display to the desired reference electrode high impedance fault value. The allowed ranges are ENTER Type of reference electrode Allowed range Low impedance (LO in step 11) 0 - 2000 kilohms High impedance (HI in step 11) 0 - 2000 megohms Entering 0000 disables the feature.
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MODEL 5081-P pH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 8.5 TEMPERATURE RELATED SETTINGS 8.5.1 Purpose This section describes how to do the following: 1. activate and deactivate automatic temperature compensation, 2. set a manual temperature compensation value, 3. match the transmitter to the type of temperature element in the pH sensor. 8.5.2 Definitions 1. AuTOMATiC TEMPERATuRE COMPENSATiON. The transmitter uses a temperature-dependent factor to convert measured cell voltage to pH.
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MODEL 5081-P pH/ORP 8.5.3 Procedure PROGRAM tEMP EXiT 1. Press PROG on the infrared remote controller (iRC). NEXT ENTER PROGRAM tAUtO EXiT ON ENTER PROGRAM tMAn EXiT SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 025.0 ENTER 2. Press NEXT until the tEMP sub-menu appears in the display. Press ENTER . 3. The screen displays the tAUTO prompt. Press  or  to enable (On) or disable (OFF) automatic temperature compensation. Press ENTER to save. 4. The tMAN prompt appears.
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MODEL 5081-P pH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 8.6 DISPLAy UNITS 8.6.1 Purpose This section describes how to do the following: 1. switch the process display units between pH and ORP (millivolts), 2. select °C or °F for the temperature display, 3. select percent of full scale or milliamps for the output display, 4. program a security code. 8.6.2 Definitions 1. diSPLAY uNiTS. Select pH if the transmitter is being used to measure pH.
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MODEL 5081-P pH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 8.7 BUFFER CALIBRATION PARAMETERS 8.7.1 Purpose This section describes how to do the following: 1. activate or deactivate auto calibration, 2. identify which buffers will be used during auto calibration, 3. set the stability criteria for auto calibration. 8.7.2 Definitions 1. AuTO CALiBRATiON. in auto calibration, screen prompts direct the user through a two point buffer calibration.
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MODEL 5081-P pH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS TABLE 8-3. pH values of commercial (technical) buffers and the temperature range over which pH values are defined pH Merck temp (°C) 2.00 0 - 95 pH Ingold temp (°C) 2.00 0 - 95 4.01 0 - 95 7.00 0 - 95 7.00 0 - 95 9.00 0 - 95 9.21 0 - 95 12.00 0 - 95 pH 1.09 DIN 19267 temp (°C) 0 - 90 3.06 0 - 90 4.65 6.79 0 - 90 0 - 90 9.23 0 - 90 12.75 0 - 90 pH 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 8.99 10.0 11.
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MODEL 5081-P pH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 8.8 ISOPOTENTIAL PARAMETERS 8.8.1 Purpose This section describes how to do the following: 1. convert the pH at the measurement temperature to the pH at a reference temperature by entering a solution temperature coefficient, 2. change the transmitter isopotential pH.
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MODEL 5081-P pH/ORP 8.8.3 Procedure PROGRAM 1. Press PROG on the infrared remote controller (iRC). ISOPOtntAL EXiT NEXT ENTER PROGRAM tCOEFF EXiT 0.000 NEXT ENTER PROGRAM ISO EXiT 07.00 NEXT ENTER PROGRAM Snr EXiT 07.00 NEXT SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS ENTER 2. Press NEXT until the ISOPOtntAL sub-menu appears. Press ENTER . 3. The screen displays the tCOEFF prompt. use the editing keys to change the display to the desired solution temperature coefficient.
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MODEL 5081-P PH/ORP SECTION 8.0 PROGRAMMING FOR pH MEASUREMENTS 8.9 GENERATING A TEST CURRENT (for 5081-P-HT only) 8.9.1 Purpose This section describes how to generate output currents for testing recorders and data handling systems. 8.9.2 what happens while the transmitter is generating a test current? 1. The output current goes to the programmed test value and remains there until the TEST function is disabled. 2. The main display continues to show the pH of the process stream.
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MODEL 5081-P pH/ORP SECTION 9.0 CALIBRATION OF ORP MEASUREMENTS SECTION 9.0 CALIBRATION OF ORP MEASUREMENTS 9.1 9.2 9.3 9.4 9.5 General Entering and Leaving the Calibrate Menu Using the Hold Function Temperature Calibration Standardization 9.1 GENERAL The Calibrate menu allows the user to calibrate the ORP and temperature response of the sensor. The ORP calibration is a one-point standardization against an ORP standard.
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MODEL 5081-P PH/ORP SECTION 9.0 CALIBRATION OF ORP MEASUREMENTS 9.4 TEMPERATURE CALIBRATION 9.4.1 Purpose 1. As discussed in Section 14.6 (ORP, Concentration, and pH), ORP is a function of temperature. The accuracy of a new sensor/transmitter loop is about ±1°C, which is adequate for most applications. A new sensor seldom requires temperature calibration. 2. Calibrate the sensor/transmitter loop if . . . a. ±1°C accuracy is NOT acceptable, or b. the temperature measurement is suspected of being in error.
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MODEL 5081-P PH/ORP SECTION 9.0 CALIBRATION OF ORP MEASUREMENTS 9.5 Standardization 9.5.1 Purpose This section describes how to prepare ORP standard solutions and how to make the transmitter reading match the ORP of the standard. Procedures for making ORP standards are taken from ASTM Method d1498-93. 9.5.2 Preparation of ORP Standard Solutions ASTM d 1498-93 gives procedures for making iron (ii) - iron (iii) and quinhydrone ORP standards. The iron (ii) - iron (iii) standard is recommended.
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MODEL 5081-P pH/ORP SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS 10.1 10.2 10.3 10.4 10.5 10.6 10.7 General Entering and Leaving the Program Menu Output Ranging Temperature Element Display Units Diagnostic Parameters Generating a Test Current 10.1 GENERAL This section describes how to do the following: 1. assign ORP values to the 4 and 20 mA outputs (for Model 5081-P-HT only), 2.
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MODEL 5081-P pH/ORP SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS TABLE 10-1. ORP Settings LIst ITEM MNEMONIC DISPLAy LIMITS FACTORy SETTINGS USER SETTINGS -1400 to 1400 mV -1400 to 1400 mV 3.80 to 22.00 mA 0 to 255 seconds 3.80 to 22.00 mA -1400 mV 1400 mV 21.00mA 0 seconds 22.00mA _______ _______ _______ _______ _______ PROGRAM LEvEL A. Output Range (Section 10.3) (for Model 5081-P-HT only) 1. 4 mA Output 2. 20 mA Output: 3. Hold 4. dampening 5. Fault Current Output Setting B.
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MODEL 5081-P pH/ORP SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS 10.3 OUTPUT RANGING (For Model 5081-P-HT only) 10.3.1 Purpose This section describes how to do the following: 1. assign ORP values to the 4 and 20 mA outputs, 2. set the output current generated by the transmitter during hold, 3. set the output current generated by the transmitter when a fault is detected, 4. control the amount of dampening on the output signal. 10.3.2 Definitions 1. CuRRENT OuTPuTS.
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MODEL 5081-P pH/ORP PROGRAM 10.3.3 Procedure OutPut EXiT NEXT ENTER PROGRAM 4MA EXiT -1400 NEXT ENTER PROGRAM 20MA EXiT 1400 NEXT ENTER PROGRAM HoLd EXiT 21.00 NEXT SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS ENTER 1. Enter the Program menu by pressing PROG on the iRC. The OutPut sub-menu appears. 2. Press ENTER. The screen displays the 4 MA prompt. use the editing keys to change the displayed number to the desired ORP. The allowed range is -1400 to 1400.
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MODEL 5081-P pH/ORP SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS 10.4 TEMPERATURE ELEMENT 10.4.1 Purpose This section describes how to match the transmitter to the type of temperature element in the ORP sensor. 10.4.2 Definition TEMPERATuRE ELEMENT: ORP sensors use a variety of temperature elements. The Model 5081-P ORP transmitter recognizes the following temperature elements and configurations: a. three and four wire 100 ohm platinum RTds b.
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MODEL 5081-P pH/ORP SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS 10.5 DISPLAy UNITS 10.5.1 Purpose This section describes how to do the following: 1. switch the process display units between pH and ORP (millivolts), 2. select °C or °F for the temperature display, 3. select percent of full scale or milliamps for the output display, 4. program a security code. 10.5.2 Definitions 1. diSPLAY uNiTS. Select pH if the transmitter is being used to measure pH.
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MODEL 5081-P pH/ORP SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS 10.6 DIAGNOSTIC PARAMETERS 10.6.1 Purpose This section describes how to do the following: 1. change the standardization (reference) offset, 2. enable and disable sensor diagnostics, 3. enable and disable glass impedance temperature compensation for a glass reference electrode, 4. set the high and low warning and failure limits for a glass reference electrode. 10.6.2 Definitions 1. STANdARdiZATiON OFFSET (REFERENCE OFFSET).
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MODEL 5081-P pH/ORP SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS PROGRAM 10.6.3 Procedure dIAGnOSTIC 1. Press PROG on the infrared remote controller (iRC). EXiT NEXT ENTER 2. Press NEXT until the diAGnOStIC sub-menu appears. Press ENTER. PROGRAM rOFFSt 060 EXiT ENTER PROGRAM dIAG OFF EXiT ENTER PROGRAM IMPtC EXiT ON NEXT ENTER PROGRAM rEF EXiT LO ENTER PROGRAM rFH EXiT 1400 ENTER 3. The screen displays the rOFFSt prompt.
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MODEL 5081-P pH/ORP PROGRAM rWJH EXiT 0040 ENTER SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS 8. The rwH prompt appears. in the display, W appears as wj. use the editing keys to change the display to the desired reference electrode high impedance warning value. The allowed ranges are Type of reference electrode Allowed range Low impedance (LO in step 6) 0 - 2000 kilohms High impedance (HI in step 6) 0 - 2000 megohms Entering 0000 disables the feature.
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MODEL 5081-P pH/ORP SECTION 10.0 PROGRAMMING FOR ORP MEASUREMENTS 10.7 GENERATING A TEST CURRENT (for Model 5081-P-HT only) 10.7.1 Purpose This section describes how to generate output currents for testing recorders and data handling systems. 10.7.2 what happens while the transmitter is generating a test current? 1. The output current goes to the programmed test value and remains there until the TEST function is disabled. 2. The main display continues to show the pH of the process stream.
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MODEL 5081-P pH/ORP SECTION 11.0 MAINTENANCE SECTION 11.0 MAINTENANCE 11.1 11.2 11.3 11.4 11.5 Overview Transmitter Maintenance pH Sensor Maintenance ORP Sensor Maintenance Calibration 11.1 OvERvIEw This section gives general procedures for routine maintenance of the 5081-P pH/ORP transmitter and pH and ORP sensors. The transmitter needs almost no routine maintenance. Sensors require periodic inspection and cleaning.
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MODEL 5081-P pH/ORP SECTION 11.0 MAINTENANCE TABLE 11-1. Replacement Parts for Model 5081-P pH/ORP Transmitter PN Description Shipping weight 23992-02 For Model 5081-P-HT — PCB stack consisting of the CPu, communication, and analog boards; display board is not included; CPu, communication, and analog boards are factory-calibrated as a unit and cannot be ordered separately 1 lb/0.
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MODEL 5081-P pH/ORP SECTION 11.0 MAINTENANCE When using acid or alkaline solvents, be careful to keep the solvent away from the liquid junction. if the cleaning solvent contacts the junction, hydrogen ions (acid solvent) or hydroxide ions (alkaline solvent) will diffuse into the junction. Because hydrogen and hydroxide ions have much greater mobility than other ions, they produce a large junction potential.
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MODEL 5081-P pH/ORP SECTION 11.0 MAINTENANCE 11.4 ORP SENSOR MAINTENANCE 11.4.1 Frequency of Cleaning The frequency at which an ORP sensor should be inspected and cleaned can be determined only by experience. if the process liquid coats or fouls the sensor, frequent cleaning may be necessary. if the process does not contain a high level of suspended solids, the need for regular cleaning will be less. 11.4.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING SECTION 12.0 TROUBLESHOOTING 12.1 12.2 12.3 12.4 12.5 12.6 12.7 12.8 12.9 wARNING AND FAULT MESSAGES CALIBRATION ERRORS TROUBLESHOOTING - GENERAL TROUBLESHOOTING wHEN A DIAGNOSTIC MESSAGE IS SHOwING TROUBLESHOOTING wHEN NO DIAGNOSTIC MESSAGE IS SHOwING SySTEMATIC TROUBLESHOOTING DISPLAyING DIAGNOSTIC vARIABLES TESTING THE TRANSMITTER By SIMULATING pH FACTORy ASSISTANCE AND REPAIRS 12.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.2 CALIBRATION ERRORS if an error occurs during calibration, an error message appears in the main display, and the transmitter does not update the calibration. The calibration errors are Std Err, SLOPE Err LO, and SLOPE Err HI. See Section 12.4 for an explanation of the error messages and suggested ways of correcting the problem. 12.3 TROUBLESHOOTING - GENERAL Troubleshooting is easy as 1, 2, 3 . . .
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.4.1 GLASSFAIL GLASSFAIL is an electrode fault message. it means the glass impedance is outside the programmed Glass Fault High (GFH) or Glass Fault Low (GFL) limit. Glass Fault High suggests the electrode is aging or the electrode is not immersed in the process liquid. Glass Fault Low implies the pH sensitive glass is cracked. GLASSFAIL also appears if inappropriate limits have been entered into the transmitter.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING b. if the sensor was wired with the blue solution ground wire unattached and a jumper between terminals TB-8 and TB-7, remove the jumper and reattach the blue solution ground wire to TB-8. Keep the gray reference in wire attached to TB-7. c. For Rosemount Analytical PLuS (+) and TupH sensors that do not have an integral preamplifier, attach the blue solution ground wire to TB-8 or, better, leave the blue wire unattached and jumper TB-7 to TB-8. d.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING SLOPE STATUS OF SENSOR 54-60 mV/unit pH Sensor is in good condition. 48-50 mV/unit pH Sensor is nearing the end of its life. Once the slope drops below 48 mV/unit pH, the sensor can no longer be calibrated. b. The Glass Fail High (GFH) limit is probably set too low for the sensor. Set the GFH limit to about 150 megohms greater than the measured glass impedance. c.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING Troubleshooting Flowchart - rEF FAIL A. Be sure the sensor is completely immersed in the process liquid. if the diagnostic message disappears, the sensor is in good condition. if the diagnostic message remains, go to step B. B. Check that the sensor is properly wired to the transmitter. See the appropriate wiring diagram in Section 3.0. Be sure the reference in wire is attached to TB-7 and the solution ground wire is attached to TB-8.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.4.4 rEFwArn rEF wArn is an electrode fault message. it means the reference electrode impedance exceeds the programmed Reference Warning High (RwH) limit. ideally, when the measurement system exceeds the warning limits, the user will have adequate time to diagnose and correct problems before a failure occurs. A high reference impedance implies that the liquid junction is plugged or the reference electrolyte is depleted.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING B. Check the sensor. Refer to the wiring diagrams in Section 3.0 to identify the RTd leads. disconnect the RTd leads and measure the resistances shown in Figure 12-3. The measured resistance should agree with the value in Table 12-1 to within about 1%. if the measured resistance is appreciably different (between 1 and 5%) from the value shown, the discrepancy can be calibrated out. See Section 8.4. FIGURE 12-3.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING C. Check the transmitter. 1. disconnect the RTd sensor leads and wire the circuit shown in Figure 12-4. Set the resistance to the value for 25°C shown in Table 12-1. The measured temperature should equal 25°C to within ±1°C. FIGURE 12-4. Temperature simulation into the Model 5081-P pH/ORP transmitter. if the measured temperature is correct, the transmitter is working properly.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING B. The RTd sense or the RTd return wire inside the sensor cable may be broken. Keep the sensor wires attached and jumper TB-3 and TB-4. if the diagnostic message disappears, either the RTd return or RTd sense wire is broken. To verify a broken wire, disconnect the leads and measure the resistance between them. installing the jumper completes the circuit, but bypasses the three-wire function.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.4.9 SLOPE Err LO SLOPE Err LO means that a two-point buffer calibration attempt has failed. The slope is too low (<40 mV/pH) for a good measurement. Troubleshooting Flowchart-SLOPE Err LO A. Repeat the calibration. 1. inaccurate buffers can cause a low slope. Repeat the calibration using fresh buffers. Alkaline buffers, pH 10 or greater, are particularly susceptible to changing value in air or with age.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.4.10 SLOPE Err HI SLOPE Err HI means that a two-point buffer calibration attempt has failed. The slope is too high (>62 mV/pH) for a good measurement. Troubleshooting Flowchart-SLOPE Err HI A. Repeat the calibration. 1. inaccurate buffers can cause a low slope. Repeat the calibration using fresh buffers. Alkaline buffers, pH 10 or greater, are particularly susceptible to changing value in air or with age.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING if the sensor is not rebuildable... Try the reference electrode rejuvenation procedure described in Section 11.0. if the rejuvenated sensor can be calibrated, the problem has been corrected. if the sensor cannot be calibrated, replace the sensor. 12.4.12 rOM FAIL or CPU FAIL rOM FAIL or CPU FAIL means the transmitter electronics have failed. Replace the electronic board stack (PN 23992-02 [-HT] or PN 23992-03 [-FF]). 12.4.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.4.15 FACt FAIL FACt FAIL appears if the transmitter factory calibration message has been triggered. A stray noise spike can cause this message to appear. if the pH reading seems acceptable, reset the calibration flag. 1. Enter the factory calibration menu by pressing  on the iRC ten times. The display will not change. immediately press . FActoryCAL appears in the display. 2. Press NEXT. rEPAir appears in the display. 3. Press NEXT.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.5.1 Id 000 in Display A security code has been programmed into the transmitter. The correct code must be entered before the transmitter can be programmed or calibrated. To retrieve a lost security code see Section 5.8. To change the security code, see Section 5.8. 12.5.2 Transmitter Does Not Respond to Infrared Remote Controller (IRC) A. Be sure the transmitter is receiving the signal. 1. Clean the window in front of the iR detector.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.5.5 pH Reading in Buffer Drifts During Manual Calibration A. Allow adequate time for the temperature of the sensor to reach the temperature of the buffer. if the sensor was in a process substantially hotter or colder than the buffer, allow at least 20 minutes for readings in the buffer to stabilize. Alternatively, place the sensor in a container of water at ambient temperature for 20 minutes before starting the calibration. B.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.5.8 Buffer Calibration Is Acceptable; Process pH is Grossly Different from Expected value. The symptoms suggest a ground loop (measurement system connected to earth ground at more than one point), a floating system (no earth ground), or noise being induced into the transmitter by sensor cabling. The problem arises from the process or installation. it is not a fault of the transmitter.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.5.9 Temperature Reading Is Inaccurate A. To troubleshoot temperature problems refer, to Section 12.4.6. B. To calibrate the temperature response of the sensor, refer to Section 6.4. C. if necessary, automatic temperature compensation can be temporarily disabled and the transmitter placed in manual temperature compensation. Refer to Section 8.5. For manual temperature, choose a temperature equal to the average temperature of the process.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.6 DISPLAyING DIAGNOSTIC vARIABLES 12.6.1 Purpose This section describes how to display the diagnostic variables listed below: DIAGNOSTIC MEASUREMENTS 1. Sensor voltage in mV (InPut) 2. Glass impedance in megohms (GIMP) 3. Reference impedance in kilohms* (rIMP) 4. Temperature in °C (tEMP) DIAGNOSTIC MESSAGES 1. Software version (vEr) 2.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.7.2 pH Simulation when the Preamplifier Is Located in the Transmitter. 1. Program PAMP to "transmitter". See Section 5.0. 2. Turn off sensor diagnostics. See Section 8.3. 3. Turn off automatic temperature compensation. Set manual temperature compensation to 25°C. See Section 8.4. 4. disconnect the sensor and wire the transmitter as shown in Figure 12-5. 5. Attach a jumper between TB-7 (REF iN) and TB-10 (pH iN). 6. Measure the voltage.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 12.7.4 pH Simulation with the Model 381+ Sensor 1. Verify that switch S-1 is set to "sensor or junction box". See Section 2.2. 2. Turn off sensor diagnostics. See Section 5.5. 3. Turn off automatic temperature compensation. Set manual temperature compensation to 25°C. See Section 8.5. 4. Refer to Figure 12-7 for connections to the sensor. 5. Remove the cover from the sensor. Leave the sensor cable connector attached. 6.
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MODEL 5081-P pH/ORP SECTION 12.0 TROUBLESHOOTING 10. Touch the other end of the second jumper to the center pin of the BNC connector on the preamplifier. dO NOT LET THE WiRE TOuCH THE OuTSidE OF THE BNC CONNECTOR. 11. Measure the voltage. The measured voltage should be 0 mV, and the pH should be approximately 7. Because the calibration data in the transmitter may be offsetting the input voltage, the displayed pH may not be exactly 7.0.
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MODEL 5081-P pH/ORP SECTION 13.0 pH MEASUREMENTS SECTION 13.0 pH MEASUREMENTS 13.1 13.2 13.3 13.4 13.5 13.6 13.7 13.8 13.9 13.10 13.11 General Measuring Electrode Reference Electrode Liquid Junction Potential Converting voltage to pH Glass Electrode Slope Buffers and Calibration Isopotential pH Junction Potential Mismatch Sensor Diagnostics Shields, Insulation, and Preamplifiers 13.
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MODEL 5081-P pH/ORP designed, the liquid junction potential is usually small and relatively constant. All three potentials depend on temperature. As discussed in Sections 13.5 and 13.6, the factor relating the cell voltage to pH is also a function of temperature. The construction of each electrode and the electrical potentials associated with it are discussed in Sections 13.2, 13.3, and 13.4. 13.2 MEASURING ELECTRODE SECTION 13.
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MODEL 5081-P pH/ORP SECTION 13.0 pH MEASUREMENTS 13.4 LIQUID JUNCTION POTENTIAL The salt bridge (see Figure 13-4) is an integral part of the reference electrode. it provides the electrical connection between the reference electrode and the liquid being measured. Salt bridges take a variety of forms, anything from a glass frit to a wooden plug. Salt bridges are highly porous, and the pores are filled with ions. The ions come from the filling solution and the sample.
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MODEL 5081-P pH/ORP The second term, 0.1984 T pH, is the potential (in mV) at the outside surface of the pH glass. This potential depends on temperature and on the pH of the sample. Assuming temperature remains constant, any change in cell voltage is caused solely by a change in the pH of the sample. Therefore, the cell voltage is a measure of the sample pH. Note that a graph of equation 1, E(T) plotted against pH, is a straight line having a y-intercept of E°(T) and a slope of 0.1984 T. SECTION 13.
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MODEL 5081-P pH/ORP SECTION 13.0 pH MEASUREMENTS are placed in pH 10 buffer, the cell voltage is V10. Note that V7 is not 0 mV as would be expected in an ideal sensor, but is slightly different. The microprocessor calculates the equation of the straight line connecting the points. The general form of the equation is: E = A + B (t + 273.15) (pH - 7) (2) The slope of the line is B (t + 273.15), where t is the temperature in °C, and the y-intercept is A. if pH 7 buffer is used for calibration, V7 equals A.
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MODEL 5081-P pH/ORP term in equation 4 to the voltage is also shown. The liquid junction potentials in the buffers are assumed to be equal and are exaggerated for clarity. if the liquid junction potential in the sample differs from the buffers, a measurement error results. Figure 13-8 illustrates how the error comes about. Assume the true pH of the sample is pHs and the cell voltage is Es. The point (pHs, Es) is shown on the graph.
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MODEL 5081-P pH/ORP SECTION 14.0 ORP MEASUREMENTS SECTION 14.0 ORP MEASUREMENTS 14.1 14.2 14.3 14.4 14.5 14.6 14.7 14.8 General Measuring Electrode Reference Electrode Liquid Junction Potential Relating Cell voltage to ORP ORP, Concentration, and pH Interpreting ORP Measurements Calibration 14.1 GENERAL Figure 14-1 shows a simplified diagram of an electrochemical cell that can be used to determine the oxidationreduction potential or ORP of a sample.
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MODEL 5081-P pH/ORP 14.2 MEASURING ELECTRODE 14.4 LIQUID JUNCTION POTENTIAL Figure 14-2 shows a typical ORP measuring electrode. The electrode consists of a band or disc of platinum attached to the base of a sealed glass tube. A platinum wire welded to the band connects it to the lead wire. A salt bridge (see Figure 14-3) is an integral part of the reference electrode. it provides the electrical connection between the reference electrode and the liquid being measured.
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MODEL 5081-P pH/ORP SECTION 14.0 ORP MEASUREMENTS FIGURE 14-4. The Origin of Liquid Junction Potentials. The figure shows a thin section through a pore in the junction plug. The junction separates a solution of potassium chloride on the left from a solution of hydrochloric acid on the right. The solutions have equal molar concentration. Driven by concentration differences, hydrogen ions and potassium ions diffuse in the directions shown. The length of each arrow indicates relative rates.
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MODEL 5081-P pH/ORP SECTION 14.0 ORP MEASUREMENTS is described by the following equation, called the Nernst equation: 0.1987 (t + 273.15) log [Fe+2] n [Fe+3] (2) ORP, mv in the Nernst equation, E is the electrode potential and E° is the standard electrode potential, both in millivolts, t is temperature in °C, n is the number of electrons transferred (n = 1 in the present case), and [Fe+2] and [Fe+3] are the concentrations of iron (ii) and iron (iii) respectively.
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MODEL 5081-P pH/ORP SECTION 14.0 ORP MEASUREMENTS The Nernst equation for reaction 3 is: E = E°- 0.1987 (t + 273.15) log 6 [Cr+3] 2 [Cr2O7-2] [H+]14 chlorine. Although the details are beyond the scope of this discussion, the result is shown in equation 7: (4) E = E° - Note that the hydrogen ion factor in the concentration ratio is raised to the fourteenth power. The table shows the expected effect of changing pH on the measured ORP at 25°C. pH changes ORP changes by from 2.0 to 2.2 7 mV from 2.
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MODEL 5081-P pH/ORP SECTION 14.0 ORP MEASUREMENTS The ORP of the iron (ii) - iron (iii) standard when measured with a platinum electrode against a saturated silver-silver chloride reference is 476 ± 20 mV at 25°C. The range of values is caused primarily by the high and variable liquid junction potential generated in solutions containing high acid concentrations. Quinhydrone - hydroquinone ORP standards are also used. They are prepared by dissolving excess quinhydrone in either pH 4.00 or pH 6.86 buffer.
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MODEL 5081-P PH/ORP SECTION 15.0 THEORy - REMOTE COMMUNICATIONS SECTION 15.0 THEORy - REMOTE COMMUNICATIONS 15.1 15.2 15.3 Overview of HART Communications HART Interface Devices AMS Communication 15.1 OvERvIEw OF HART COMMUNICATION HART (highway addressable remote transducer) is a digital communication system in which two frequencies are superimposed on the 4 to 20 mA output signal from the transmitter. A 1200 Hz sine wave represents the digit 1, and a 2400 Hz sine wave represents the digit 0.
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MODEL 5081-P PH/ORP SECTION 15.0 THEORy - REMOTE COMMUNICATIONS if your communicator does not recognize the Model 5081-P pH/ORP transmitter, the device description library may need updating. Call the manufacturer of your HART communication device for updates. 15.3 ASSET MANAGEMENT SOLUTIONS Asset Management Solutions (AMS) is software that helps plant personnel better monitor the performance of analytical instruments, pressure and temperature transmitters, and control valves.
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MODEL 5081-P pH/ORP SECTION 16.0 RETURN OF MATERIAL SECTION 16.0 RETURN OF MATERIAL 16.1 GENERAL. 16.3 NON-wARRANTy REPAIR. To expedite the repair and return of instruments, proper communication between the customer and the factory is important. Call 1-949-757-8500 for a Return Materials Authorization (RMA) number. The following is the procedure for returning for repair instruments that are no longer under warranty: 1. Call Rosemount Analytical for authorization. 2.
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wARRANTy Goods and part(s) (excluding consumables) manufactured by Seller are warranted to be free from defects in workmanship and material under normal use and service for a period of twelve (12) months from the date of shipment by Seller. Consumables, pH electrodes, membranes, liquid junctions, electrolyte, O-rings, etc. are warranted to be free from defects in workmanship and material under normal use and service for a period of ninety (90) days from date of shipment by Seller.
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The right people, the right answers, right now. ON-LINE ORDERING NOW AVAILABLE ON OUR WEB SITE http://www.raihome.com Specifications subject to change without notice. 8 Credit Cards for u.S. Purchases Only. Emerson Process Management 2400 Barranca Parkway irvine, CA 92606 uSA Tel: (949) 757-8500 Fax: (949) 474-7250 http://www.raihome.com © Rosemount Analytical inc.