Instruction manual

ManualsBrandsEmerson ManualsConsumer electronicsSolu Comp Xmt-P-FF/FI

Model Solu Comp Xmt-A-FF/FI

FOUNDATION

Fieldbus Chlorine, Dissolved Oxygen, and Ozone

Transmitter

Instruction Manual

PN 51-Xmt-A-FF/FI/rev.G

December 2009

Summary of content (118 pages)

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Instruction Manual PN 51-Xmt-A-FF/FI/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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QUICK START GUIDE FOR MODEL SOLU COMP Xmt-A-FF/FI TRANSMITTER 1. Refer to Section 2.0 for installation instructions. 2. Wire sensors to the analyzer. See section 3.0. 3. Once connections are secure and verified, apply power to the transmitter. 4. When the transmitter is powered up for the first time, Quick Start screens appear. Using Quick Start is easy. a. A blinking field shows the position of the cursor. b. Use the or key to move the cursor left or right.
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Language MENU TREE FOR MODEL SOLU COMP Xmt-A-FF TRANSMITTER QUICK START GUIDE
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MODEL XMT-A-FF/FI TABLE OF CONTENTS MODEL XMT-A-FF/FI MICROPROCESSOR TRANSMITTER TABLE OF CONTENTS Section 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Title DESCRIPTION AND SPECIFICATIONS ................................................................ Features and Applications........................................................................................ Specifications ...........................................................................................................
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MODEL XMT-A-FF/FI TABLE OF CONTENTS TABLE OF CONTENTS CONT’D Section Title Page 9.0 CALIBRATION — DISSOLVED OXYGEN .............................................................. 9.1 Introduction .............................................................................................................. 53 9.2 Procedure — Zeroing the Sensor ............................................................................ 54 9.3 Procedure — Calibrating the Sensor in Air .............................
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MODEL XMT-A-FF/FI TABLE OF CONTENTS TABLE OF CONTENTS CONT’D Section Title Page 15.0 15.1 15.2 15.3 15.4 15.5 15.6 15.7 15.8 15.9 15.10 15.11 15.12 15.13 15.14 15.15 TROUBLESHOOTING ........................................................................................... Overview .................................................................................................................. Troubleshooting When a Fault or Warning Message is Showing ............................
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MODEL XMT-A-FF/FI TABLE OF CONTENTS LIST OF FIGURES Number Title Page 1-1 Configuring Model Xmt-A Transmitter with FOUNDATION Fieldbus ........................... 5 1-2 AMS Inside Configuration Screen Using FOUNDATION Fieldbus .............................. 6 2-1 Removing the Knockouts ......................................................................................... 8 2-2 Panel Mount Installation ..........................................................................................
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MODEL XMT-A-FF/FI TABLE OF CONTENTS LIST OF FIGURES (continued) Number Title Page 4-1 FM Intrinsically Safe Label for Model Xmt-A-FF ...................................................... 20 4-2 FM Intrinsically Safe Installation for Model Xmt-A-FF (1 of 2) ................................ 21 4-3 FM Intrinsically Safe Installation for Model Xmt-A-FF (2 of 2) ................................ 22 4-4 CSA Intrinsically Safe Label for Model Xmt-A-FF .................................................
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MODEL XMT-A-FF/FI SECTION 1.0 DESCRIPTION AND SPECIFICATIONS SECTION 1.
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MODEL XMT-A-FF/FI SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 1.2 SPECIFICATIONS Case: Polycarbonate (panel mount and pipe/wall mount); NEMA 4X/CSA 4 (IP65) Dimensions Panel (code -10): 6.10 x 6.10 x 3.72 in. (155 x 155 x 94.5 mm) Surface/Pipe (code -11): 6.23 x 6.23 x 3.23 in. (158 x 158 x 82 mm); see page 15 for dimensions of pipe mounting bracket. Conduit openings: Accepts PG13.5 or 1/2 in. conduit fittings Ambient Temperature: 32 to 122°F (0 to 50°C). Some degradation of display above 50°C.
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MODEL XMT-A-FF/FI SECTION 1.0 DESCRIPTION AND SPECIFICATIONS GENERAL SPECIFICATIONS FOR Xmt-A HAZARDOUS LOCATION APPROVALS Input ranges: 0-330 nA, 0.3-4µA, 3.7-30 µA, 27-100 µA Intrinsic Safety: Class I, II, III, Div. 1 Groups A-G T4 Tamb = 50°C Repeatability (input): ±0.1% of range Linearity (input): ±0.3% of range Temperature range: -10 to 100°C (-10 to 150°C for steam sterilizable sensors) Class I, II, III, Div. 1 Groups A-G T4 Tamb = 50°C Temperature accuracy using RTD: ±0.
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MODEL XMT-A-FF/FI SECTION 1.0 DESCRIPTION AND SPECIFICATIONS SPECIFICATIONS — OXYGEN SPECIFICATIONS — pH Measurement Range: 0-20 ppm (mg/L), or equivalent partial pressure or % saturation (limited by sensor) Application: pH measurement available with free chlorine only Units: ppm, ppb, % saturation, partial pressure (mmHg, inHg, atm, mbar, bar, kPa) Measurement Range: 0-14 pH Resolution: 0.01 pH for partial pressure (x.
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MODEL XMT-A-FF/FI SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 1.3 TRANSMITTER DISPLAY DURING CALIBRATION AND PROGRAMMING The display can be readily configured to meet user requirements. Basic display for all measurements: 1.234ppm 25.0°C 12.34mA For the measurement of oxygen, a variety of units are available: ppm, ppb (for 499ATrDO sensor only), % saturation, and partial pressure (in units of mm Hg, in Hg, bar, mbar, atm, or kPa).
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MODEL XMT-A-FF/FI SECTION 1.0 DESCRIPTION AND SPECIFICATIONS ASSET MANAGEMENT SOLUTIONS (AMS) Rosemount Analytical AMS windows provide access to all transmitter measurement and configuration variables. The user can read raw data, final data, and program settings and can reconfigure the transmitter from anywhere in the plant. Figure 1-2 shows a configuration screen available through AMS Inside using FOUNDATION fieldbus. FIGURE 1-2.
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MODEL XMT-A-FF/FI SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 1.5 ORDERING INFORMATION The Solu Comp Model Xmt Two-Wire Transmitter is intended for the determination of pH/ORP, conductivity (both contacting and toroidal), and for measurements using membrane-covered amperometric sensors (oxygen, ozone, free and total chlorine, and monochloramine). For free chlorine measurements, which often require continuous pH correction, a second input for a pH sensor is standard.
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MODEL XMT-A-FF/FI SECTION 2.0 INSTALLATION SECTION 2.0 INSTALLATION 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, unpack the container. Be sure all items shown on the packing list are present. If items are missing, notify Emerson Process Management immediately. 2.2 INSTALLATION 2.2.1 General Information 1.
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MODEL XMT-A-FF/FI SECTION 2.0 INSTALLATION 2.2.2 Panel Mounting MILLIMETER INCH FIGURE 2-2. Panel Mount Installation Access to the wiring terminals is through the rear cover. Four screws hold the cover in place.
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MODEL XMT-A-FF/FI SECTION 2.0 INSTALLATION 2.2.3 Pipe Mounting MILLIMETER INCH FIGURE 2-3. Pipe Mount Installation The front panel is hinged at the bottom. The panel swings down for access to the wiring terminals.
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MODEL XMT-A-FF/FI SECTION 2.0 INSTALLATION 2.2.4 Surface Mounting. MILLIMETER INCH FIGURE 2-4. Surface Mount Installation The front panel is hinged at the bottom. The panel swings down for access to the wiring terminals.
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MODEL XMT-A-FF/FI SECTION 2.0 INSTALLATION 2.3 POWER SUPPLY WIRING Refer to Figures 2-6, 2-7, and 2-8. Run the power/signal wiring through the opening nearest terminal block 2 (TB2). 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 XMT-A-FF/FI SECTION 2.0 INSTALLATION FIGURE 2-7. Power and Sensor Wiring Terminals and Wiring Label for Xmt-A-FF Panel Mount Enclosure.
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MODEL XMT-A-FF/FI SECTION 2.0 INSTALLATION FIGURE 2-8. Power and Sensor Wiring Terminals and Wiring Label for Xmt-A-FF Pipe/Surface Mount Enclosure.
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MODEL XMT-A-FF/FI SECTION 3.0 SENSOR WIRING SECTION 3.0 SENSOR WIRING 3.1 WIRING MODEL 499A OXYGEN, CHLORINE, MONOCHLORAMINE, AND OZONE SENSORS All 499A sensors (499ADO, 499ATrDO, 499ACL-01, 499ACL-02, 499ACL-03, and 499AOZ) have identical wiring. Use the pigtail wire and wire nuts provided with the sensor when more than one wire must be attached to a single terminal. FIGURE 3-1. Xmt-A-FF panel mount; 499A sensors with standard cable FIGURE 3-2.
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MODEL XMT-A-FF/FI SECTION 3.0 SENSOR WIRING 3.2 WIRING MODEL 499ACL-01 (Free Chlorine) SENSORS AND pH SENSORS If free chlorine is being measured and the pH of the liquid varies more than 0.2 pH unit, a continuous correction for pH must be applied to the chlorine reading. Therefore, a pH sensor must be wired to the transmitter. This section gives wiring diagrams for the pH sensors typically used.
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MODEL XMT-A-FF/FI SECTION 3.0 SENSOR WIRING FIGURE 3-7. Xmt-A-FF panel mount; free chlorine sensor with standard cable and 399-14 pH sensor. FIGURE 3-8. Xmt-A-FF panel mount; free chlorine sensor with optimum EMI/RFI or Variopol cable and 399-09-62 pH sensor. FIGURE 3-9. Xmt-A-FF panel mount; free chlorine sensor with optimum EMI/RFI or Variopol and 399-VP-09- pH sensor. FIGURE 3-10. Xmt-A-FF panel mount; free chlorine sensor with optimum EMI/RFI or Variopol 399-14 pH sensor.
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MODEL XMT-A-FF/FI SECTION 3.0 SENSOR WIRING FIGURE 3-11. Xmt-A-FF wall/pipe mount; free chlorine sensor with standard cable and 399-09-62 pH sensor. FIGURE 3-12. Xmt-A-FF wall/pipe mount; free chlorine sensor with standard cable and 399-VP-09 pH sensor. FIGURE 3-13. Xmt-A-FF wall/pipe mount; free chlorine sensor with standard cable and 399-14 pH sensor. FIGURE 3-14. Xmt-A-FF wall/pipe mount; free chlorine sensor with optimum EMI/RFI or Variopol cable and 399-09-62 pH sensor.
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MODEL XMT-A-FF/FI FIGURE 3-15. Xmt-A-FF wall/pipe mount; free chlorine sensor with optimum EMI/RFI or Variopol and 399-VP-09- pH sensor. SECTION 3.0 SENSOR WIRING FIGURE 3-16. Xmt-A-FF wall/pipe mount; free chlorine sensor with optimum EMI/RFI or Variopol 399-14 pH sensor. 3.3 WIRING MODEL Hx438 AND Gx448 SENSORS FIGURE 3-17. Xmt-A-FF panel mount with Hx438 or Gx448 sensor. FIGURE 3-18. Xmt-A-FF wall/pipe mount with Hx438 or Gx448 sensor.
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20 R Analytical FM MATERIAL: 3M SCOTCHCAL #3650-10 (WHITE VINYL FACESTOCK) OR POLYESTER, (.002 REFERENCE THICKNESS CLEAR MATTE MYLAR OVERLAMINATE, .002-.005 FINISH THICKNESS. PRESSURE SENSITIVE ADHESIVE, FARSIDE AND SPLIT LINER) OR (INTERMEC PN L7211210, 2 MIL GLOSS WHITE POLYESTER WITH PRESSURE SENSITIVE ACRYLIC ADHESIVE. NOMENCLATURE TO BE PRINTED USING INTERMEC SUPER PREMIUM BLACK THERMAL TRANSFER RIBBON) SEE BLANK LABEL PN 9241406-01. ARTWORK IS SHEET 2 OF 2. 2 1.
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MODEL XMT-A-FF XMTR 6 1 2 3 4 5 6 7 8 9 10 11 12 5 8 NOTES: UNLESS OTHERWISE SPECIFIED Voc OR Vt NOT GREATER THAN 30 V Isc OR It NOT GREATER THAN 200 mA Pmax NOT GREATER THAN 0.9 W 7 5 TABLE I 30 Vmax (Vdc) ECO NO. 9064 30 4 TABLE III 7.97 2.974 0.974 La (mH) REV A Ci (nF) 0.4 Pmax (W) 1.3 Po Io Uo 0 Li (mH) 511.59mW 157.17mA 13.03V MODEL XMT-A-FF TB1-1 THRU 12 FINISH ANGLES TOLERANCES + 1/2 DIMENSIONS ARE IN INCHES 3 REMOVE BURRS & SHARP EDGES .
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8 PREAMP (NOTE 4) MODEL XMT-A-FF XMTR 5 5 3 2 1 MODEL XMT-A-FF XMTR MODEL XMT-A-FF XMTR MODEL XMT-A-FF XMTR 4 IS CLASS I, II, III, DIVISION 1, GROUPS A, B, C, D, E, F, G; HAZARDOUS AREA 4 3 3 SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) FIGURE 4-3. FM Intrinsically Safe Installation for Model Xmt-A-FF (p.
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R Analytical R -LR 34186 MATERIAL: 3M SCOTCHCAL #3650-10 (WHITE VINYL FACESTOCK) OR POLYESTER, (.002 REFERENCE THICKNESS CLEAR MATTE MYLAR OVERLAMINATE, .002-.005 FINISH THICKNESS. PRESSURE SENSITIVE ADHESIVE, FARSIDE AND SPLIT LINER) OR (INTERMEC PN L7211210, 2 MIL GLOSS WHITE POLYESTER WITH PRESSURE SENSITIVE ACRYLIC ADHESIVE. NOMENCLATURE TO BE PRINTED USING INTERMEC SUPER PREMIUM BLACK THERMAL TRANSFER RIBBON) SEE BLANK LABEL PN 9241406-01. ARTWORK IS SHEET 2 OF 2. 2 1.
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8 MODEL XMT-A-FF XMTR 6 1 2 3 4 5 6 7 8 9 10 11 12 5 8 NOTES: UNLESS OTHERWISE SPECIFIED Voc OR Vt NOT GREATER THAN 30 V Isc OR It NOT GREATER THAN 300 mA Pmax NOT GREATER THAN 1.3 W 7 5 REVISION DESCRIPTION TABLE III 7.97 2.974 0.974 La (mH) 9047 ECO NO. 10-6-04 RELEASE DATE 30 375 30 Vmax (Vdc) REV A Ci (nF) 0.4 Pmax (W) 1.3 Po Io Uo 0 Li (mH) 511.59mW 157.17mA 13.
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8 MODEL XMT-A-FF XMTR 5 5 3 2 1 MODEL XMT-A-FF XMTR MODEL XMT-A-FF XMTR MODEL XMT-A-FF XMTR 4 IS CLASS I, GRPS A-D CLASS II, GRPS E-G CLASS III HAZARDOUS AREA 4 3 3 SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) FIGURE 4-6. CSA Intrinsically Safe Installation for Model Xmt-A-FF (p.
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26 R SUPPLY BAS04ATEX0213X EEx ia IIC T4 Tamb = 0°C TO +50°C ALL ALPHA AND NUMERIC CHARACTERS ON LABEL TO BE BLACK HELVETICA MEDIUM. BACKGROUND TO BE WHITE. MATERIAL: 3M SCOTCHCAL #3650-10 (WHITE VINYL FACESTOCK) OR POLYESTER, (.002 REFERENCE THICKNESS CLEAR MATTE MYLAR OVERLAMINATE, .002-.005 FINISH THICKNESS. PRESSURE SENSITIVE ADHESIVE, FARSIDE AND SPLIT LINER). ARTWORK IS SHEET 2 OF 2. 3. 2 1. NOTES: UNLESS OTHERWISE SPECIFIED NO CHANGE WITHOUT Baseefa APPROVAL.
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A B C D 8 7 6 40 23.2 IIA 8 NOTES: UNLESS OTHERWISE SPECIFIED 7 30 375 5.5nF 0mH Li 1.3 0.4 0 Wamx IN: W 1.0 4 RELEASE DATE 6-30-05 ECO NO. 9065 Baseefa Certified Product No modifications permitted without the approval of the Authorized Person Related Drawing 200 Imax IN:mA A REV 0.0 Li (mH) FINISH + 1/2 DIMENSIONS ARE IN INCHES ANGLES TOLERANCES 3 REMOVE BURRS & SHARP EDGES .020 MAX MACHINED FILLET RADII .020 MAX NOMINAL SURFACE FINISH 125 + .030 + .010 - MATERIAL .
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PH SENSOR WITH TC AMPEROMETRIC SENSOR 7 PREAMP (NOTE 4) 4 (ZONE 0) 3 3 SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) FIGURE 4-9. ATEX Intrinsically Safe Installation for Model Xmt-A-FF 5 TO PREVENT IGNITION OF FLAMMABLE OR COMBUSTIBLE ATMOSPHERES, DISCONNECT POWER BEFORE SERVICING. 6 SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY OR SUITABILITY FOR DIVISION 2.
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R Analytical APPROVED FM MATERIAL: 3M SCOTCHCAL #3650-10 (WHITE VINYL FACESTOCK) OR POLYESTER, (.002 REFERENCE THICKNESS CLEAR MATTE MYLAR OVERLAMINATE, .002-.005 FINISH THICKNESS. PRESSURE SENSITIVE ADHESIVE, FARSIDE AND SPLIT LINER) OR (INTERMEC PN L7211210, 2 MIL GLOSS WHITE POLYESTER WITH PRESSURE SENSITIVE ACRYLIC ADHESIVE. NOMENCLATURE TO BE PRINTED USING INTERMEC SUPER PREMIUM BLACK THERMAL TRASFER RIBBON). SEE BLANK LABEL PN 9241406-01). ARTWORK IS SHEET 2 OF 2. 2 1.
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8 MODEL XMT-A-FI XMTR 6 1 2 3 4 5 6 7 8 9 10 11 12 5 8 NOTES: UNLESS OTHERWISE SPECIFIED Voc OR Vt NOT GREATER THAN 30 V Isc OR It NOT GREATER THAN 200 mA Pmax NOT GREATER THAN 0.9 W 7 5 30 4 RELEASE DATE ECO NO. 9064 Vmax IN: Vdc 17.5 Vmax (Vdc) 375 10-6-04 TABLE III 59.97 29.97 7.97 La (mH) A REV TABLE II 0.4 5.32 0 Li (mH) FINISH + 1/2 DIMENSIONS ARE IN INCHES ANGLES TOLERANCES 3 REMOVE BURRS & SHARP EDGES .020MAX MACHINED FILLET RADII .
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8 PREAMP (NOTE 4) MODEL XMT-A-FI XMTR 5 5 3 2 1 MODEL XMT-A-FI XMTR MODEL XMT-A-FI XMTR MODEL XMT-A-FI XMTR 4 IS CLASS I, II, III, DIVISION 1, GROUPS A, B, C, D, E, F, G; HAZARDOUS AREA 4 3 3 SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) FIGURE 4-12. FM Intrinsically Safe Installation for Model Xmt-A-FI (p.
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32 R Analytical R -LR 34186 MATERIAL: 3M SCOTCHCAL #3650-10 (WHITE VINYL FACESTOCK) OR POLYESTER, (.002 REFERENCE THICKNESS CLEAR MATTE MYLAR OVERLAMINATE, .002-.005 FINISH THICKNESS. PRESSURE SENSITIVE ADHESIVE, FARSIDE AND SPLIT LINER) OR (INTERMEC PN L7211210, 2 MIL GLOSS WHITE POLYESTER WITH PRESSURE SENSITIVE ACRYLIC ADHESIVE. NOMENCLATURE TO BE PRINTED USING INTERMEC SUPER PREMIUM BLACK THERMAL TRASFER RIBBON). SEE BLANK LABEL PN 9241406-01). ARTWORK IS SHEET 2 OF 2. 2 1.
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MODEL XMT-A-FI XMTR 6 1 2 3 4 5 6 7 8 9 10 11 12 5 8 NOTES: UNLESS OTHERWISE SPECIFIED 7 5 TABLE III 59.97 29.97 7.97 La (mH) 9047 ECO NO. 10-6-04 RELEASE DATE 30 375 17.5 A REV Vmax (Vdc) 5.32 380 0.4 13.03V 0 Li (mH) 208.96mW 64.15mA FINISH + 1/2 DIMENSIONS ARE IN INCHES ANGLES TOLERANCES 3 REMOVE BURRS & SHARP EDGES .020MAX MACHINED FILLET RADII .020 MAX NOMINAL SURFACE FINISH 125 + - .030 + .010 - MATERIAL .XX .
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8 MODEL XMT-A-FI XMTR 5 5 3 2 1 MODEL XMT-A-FI XMTR MODEL XMT-A-FI XMTR MODEL XMT-A-FI XMTR 4 IS CLASS I, GRPS A-D CLASS II, GRPS E-G CLASS III HAZARDOUS AREA 4 3 3 SAFETY BARRIER (SEE NOTE 8) SAFETY BARRIER (SEE NOTE 8) SAFETY BARRIER (SEE NOTE 8) SAFETY BARRIER (SEE NOTE 8) FIGURE 4-15. CSA Intrinsically Safe Installation for Model Xmt-A-FI (p.
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R BAS04ATEX0213X EEx ia IIC T4 Tamb = 0 °C TO +50 °C ALL ALPHA AND NUMERIC CHARACTERS ON LABEL TO BE BLACK HELVETICA MEDIUM. BACKGROUND TO BE WHITE. MATERIAL: 3M SCOTCHCAL #3650-10 (WHITE VINYL FACESTOCK) OR POLYESTER, (.002 REFERENCE THICKNESS CLEAR MATTE MYLAR OVERLAMINATE, .002-.005 FINISH THICKNESS. PRESSURE SENSITIVE ADHESIVE, FARSIDE AND SPLIT LINER). ARTWORK IS SHEET 2 OF 2. 3. 2 1. NOTES: UNLESS OTHERWISE SPECIFIED NO CHANGE WITHOUT Baseefa APPROVAL. Ui = 17.5 VDC Ii = 380 mA Pi = 5.
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36 A B C D 8 7 6 40 23.2 IIA 8 NOTES: UNLESS OTHERWISE SPECIFIED 7 Vmax IN: Vdc 30 375 17.5 Vmax (Vdc) 5 5.32 Pmax (W) 0.4 0 Wamx IN: W 1.0 4 RELEASE DATE 6-30-05 ECO NO. 9065 Baseefa Certified Product No modifications permitted without the approval of the Authorized Person Related Drawing 200 Imax IN:mA A REV 0.0 Li (mH) FINISH + 1/2 DIMENSIONS ARE IN INCHES ANGLES TOLERANCES 3 REMOVE BURRS & SHARP EDGES .020 MAX MACHINED FILLET RADII .
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PH SENSOR WITH TC AMPEROMETRIC SENSOR 7 PREAMP (NOTE 4) 4 (ZONE 0) 3 3 SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) SAFETY BARRIER (SEE NOTES 1 & 9) FIGURE 4-18. ATEX Intrinsically Safe Installation for Model Xmt-A-FI (p. 2 of 2) 5 TO PREVENT IGNITION OF FLAMMABLE OR COMBUSTIBLE ATMOSPHERES, DISCONNECT POWER BEFORE SERVICING. WARNING6 SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY OR SUITABILITY FOR DIVISION 2.
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MODEL XMT-A-FF/FI SECTION 5.0 DISPLAY AND OPERATION SECTION 5.0 DISPLAY AND OPERATION 5.1. DISPLAY The Model Xmt-A-FF has a two-line display. Generally, the user can program the transmitter to show one of two displays. If the transmitter has been configured to measure free chlorine with continuous pH correction, more displays are available. Figure 5-1 shows the displays available for dissolved oxygen. The transmitter has information screens that supplement the data in the main display.
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MODEL XMT-A-FF/FI SECTION 5.0 DISPLAY AND OPERATION 5.3 SECURITY 5.3.1 How the Security Code Works Use security codes to prevent accidental or unwanted changes to program settings, displays, and calibration. Two threedigit security codes can be used to do the following… a. Allow a user to view the default display and information screens only. b. Allow a user access to the calibration and hold menus only. c. Allow a user access to all the menus. Enter Security 000 Code: 1.
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MODEL XMT-A-FF/FI SECTION 6.0 OPERATION WITH MODEL 375 SECTION 6.0 OPERATION WITH MODEL 375 6.1 Note on Model 375 Communicator The Model 375 HART and FOUNDATION Fieldbus Communicator is a product of Emerson Process Management, Rosemount Inc. This section contains selected information on using the Model 375 with the Rosemount Analytical Model Xmt-A-FF Transmitter. For complete information on the Model 375 Communicator, see the Model 375 instruction manual.
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MODEL XMT-A-FF/FI SECTION 7.0 PROGRAMMING THE TRANSMITTER SECTION 7.0 PROGRAMMING THE TRANSMITTER 7.1 GENERAL This section describes how to program the transmitter using the keypad. 1. Select the measurement to be made (oxygen, ozone, free chlorine, total chlorine, or monochloramine). 2. Choose temperature units and automatic or manual temperature mode. 3. Set a security code. 4. Program the transmitter for maximum reduction of environmental noise. Default settings are shown in Table 7-1.
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MODEL XMT-A-FF/FI SECTION 7.0 PROGRAMMING THE TRANSMITTER TABLE 7-1.
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MODEL XMT-A-FF/FI SECTION 7.0 PROGRAMMING THE TRANSMITTER 7.3 CHOOSING AND CONFIGURING THE ANALYTICAL MEASUREMENT 7.3.1 Purpose This section describes how to do the following: 1. Configure the transmitter to measure oxygen, ozone, free chlorine, total chlorine, or monochloramine. 2. Choose the concentration units to be displayed 3. Set an input filter for the raw sensor current. 4. If oxygen was selected, there are additional selections to make. a. identify the type of sensor being used b.
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MODEL XMT-A-FF/FI SECTION 7.0 PROGRAMMING THE TRANSMITTER 7. SALINITY (DISSOLVED OXYGEN ONLY). The solubility of oxygen in water depends on the concentration of dissolved salts in water. Increasing the concentration decreases the solubility. If the salt concentration is greater than about 1000 ppm, the accuracy of the measurement can be improved by applying a salinity correction. Enter the salinity as parts per thousand. One percent is ten parts per thousand. 8. pH CORRECTION (FREE CHLORINE ONLY).
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MODEL XMT-A-FF/FI SECTION 7.0 PROGRAMMING THE TRANSMITTER 7.3.3 Procedure: Measurement Calibrate Sim. PV Program Display Measurement° Temp Security 2. Choose Measurement. >> Measurement type Oxygen 1. Press MENU. The menu screen appears. Choose Program. Ozone >> 3. Choose Measurement type (oxygen, ozone, free chlorine, total chlorine, or monochloramine). 4. The screen appearing next depends on the selection made in step 3. a. If you chose oxygen, go to step 5a. b.
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MODEL XMT-A-FF/FI SECTION 7.0 PROGRAMMING THE TRANSMITTER pH Comp? Auto Manual Use Preamp in? Xmtr Sensor/JBox 7b. Identify the location of the pre-amplifier for the pH sensor. Is it in the transmitter (Xmtr) or in the sensor or junction box (Sensor/Jbox)? pH sensor pre-amplifier location 399-09-62 Sensor/JBox 399VP-09 Sensor/JBox 399-14 Xmtr 7c. Select a maximum value for the pH sensor reference offset. Max pH reference offset: 7a. For free chlorine, choose auto or manual pH correction.
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MODEL XMT-A-FF/FI SECTION 7.0 PROGRAMMING THE TRANSMITTER Cl Cal Slope? Single Dual Input filter? 63% in 8a. If you chose total chlorine, select single or dual slope calibration. For the vast majority of applications, dual slope calibration is unnecessary. 8b. Enter the time constant for the input filter. 005sec 8c. To return to the main display, press MENU then EXIT. Input filter? 63% in 9a. If you chose monochloramine, enter the time constant for the input filter. 005sec 9b.
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MODEL XMT-A-FF/FI SECTION 7.0 PROGRAMMING THE TRANSMITTER 7.4.3 Procedure: Temperature settings Calibrate Sim. PV Program Display Temp Measurement Security 2. Choose Temp. >> 3. Choose °C/°F to change the display units. Choose Live/Manual to turn on (Live) or turn off (Manual) automatic temperature correction for membrane permeability and automatic temperature compensation for pH. a. If you chose °C/°F, select °C or °F. b. If you chose Live/Manual, select Live or Manual. c.
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MODEL XMT-A-FF/FI SECTION 7.0 PROGRAMMING THE TRANSMITTER 7.6 NOISE REDUCTION 7.6.1 Purpose For maximum noise reduction, the frequency of the ambient AC power must be entered. 7.6.2 Procedure: Noise reduction Calibrate Sim. PV Program Display Measurement Temp Security 1. Press MENU. The menu screen appears. Choose Program. 2. Choose >>. >> 3. Choose Noise Reduction. Noise Rejection ResetTransmitter >> 4. Select the frequency of the ambient AC power. Ambient AC Power 60Hz 50Hz 5.
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MODEL XMT-A-FF/FI SECTION 7.0 PROGRAMMING THE TRANSMITTER 7.8 SELECTING A DEFAULT SCREEN AND SCREEN CONTRAST 7.8.1 Purpose This section describes how to do the following: 1. Set a default screen. The default screen is the screen shown during normal operation. The Solu Comp Xmt allows the user to choose from a number of screens. Which screens are available depends on the measurement the transmitter is making. 2. Change the screen contrast. 7.8.2 Procedure: Choosing a display screen. Calibrate Sim.
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MODEL XMT-A-FF/FI SECTION 8.0 CALIBRATION — TEMPERATURE SECTION 8.0 CALIBRATION — TEMPERATURE 8.1 INTRODUCTION All five amperometric sensors (oxygen, ozone, free chlorine, total chlorine, and monochloramine) are membranecovered sensors. As the sensor operates, the analyte (the substance to be determined) diffuses through the membrane and is consumed at an electrode immediately behind the membrane. The reaction produces a current that depends on the rate at which the analyte diffuses through the membrane.
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MODEL XMT-A-FF/FI SECTION 8.0 CALIBRATION — TEMPERATURE 8.2 PROCEDURE: CALIBRATING TEMPERATURE 1. Remove the sensor from the process liquid. Place it in an insulated container of water along with a calibrated thermometer. Submerge at least the bottom two inches of the sensor. Stir continuously. 2. Allow the sensor to reach thermal equilibrium. For some sensors, the time constant for a change in temperature is 5 min., so it may take as long as 30 min. for temperature equilibration. 3.
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MODEL XMT-A-FF/FI SECTION 9.0 CALIBRATION — DISSOLVED OXYGEN SECTION 9.0 CALIBRATION — DISSOLVED OXYGEN 9.1 INTRODUCTION As Figure 9-1 shows, oxygen sensors generate a current directly proportional to the concentration of dissolved oxygen in the sample. Calibrating the sensor requires exposing it to a solution containing no oxygen (zero standard) and to a solution containing a known amount of oxygen (full-scale standard).
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MODEL XMT-A-FF/FI SECTION 9.0 CALIBRATION — DISSOLVED OXYGEN 9.2 PROCEDURE — ZEROING THE SENSOR 1. Place the sensor in a fresh solution of 5% sodium sulfite (Na2SO3) in water. Be sure air bubbles are not trapped against the membrane. The current will drop rapidly at first and then gradually reach a stable zero value. To monitor the sensor current, go to the main display and press until the input current screen appears. Note the units: nA is nanoamps, µA is microamps.
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MODEL XMT-A-FF/FI SECTION 9.0 CALIBRATION — DISSOLVED OXYGEN 9.3 PROCEDURE - CALIBRATING THE SENSOR IN AIR 1. Remove the sensor from the process liquid. Use a soft tissue and a stream of water from a wash bottle to clean the membrane. Blot dry. The membrane must be dry during air calibration. 2. Pour some water in a beaker and suspend the sensor with the membrane about 0.5 inch (1 cm) above the water surface. To avoid drift caused by temperature changes, keep the sensor out of the direct sun. 3.
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MODEL XMT-A-FF/FI SECTION 9.0 CALIBRATION — DISSOLVED OXYGEN 9.3 PROCEDURE - CALIBRATING THE SENSOR IN AIR (continued) Air Stabilize Time: 10sec a. Enter the desired stabilization time. Restart time if Change > 0.02ppm Salinity parts/ thousand? 12. If you chose Setup in step 6, the screen at left appears. This screen and the following one let you change the stabilization criteria for air calibration.
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MODEL XMT-A-FF/FI SECTION 9.0 CALIBRATION — DISSOLVED OXYGEN 9.4 PROCEDURE - CALIBRATING THE SENSOR AGAINST A STANDARD INSTRUMENT The sensor can be calibrated against a standard instrument. For oxygen sensors installed in aeration basins in waste treatment plants, calibration against a second instrument is often preferred. For an accurate calibration be sure that . . . 1. The standard instrument has been zeroed and calibrated against water-saturated air following the manufacturer's instructions. 2.
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MODEL XMT-A-FF/FI SECTION 10.0 CALIBRATION - FREE CHLORINE SECTION 10.0 CALIBRATION — FREE CHLORINE 10.1 INTRODUCTION As Figure 10-1 shows, a free chlorine sensor generates a current directly proportional to the concentration of free chlorine in the sample. Calibrating the sensor requires exposing it to a solution containing no chlorine (zero standard) and to a solution containing a known amount of chlorine (full-scale standard).
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MODEL XMT-A-FF/FI SECTION 10.0 CALIBRATION - FREE CHLORINE 10.2 PROCEDURE — ZEROING THE SENSOR 1. Place the sensor in the zero standard (see Section 10.1). Be sure no air bubbles are trapped against the membrane. The sensor current will drop rapidly at first and then gradually reach a stable zero value. To monitor the sensor current, go to the main display and press until the input current screen appears. Note the units: nA is nanoamps, µA is microamps.
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MODEL XMT-A-FF/FI SECTION 10.0 CALIBRATION - FREE CHLORINE 10.3 PROCEDURE — FULL SCALE CALIBRATION 1. Place the sensor in the process liquid. If automatic pH correction is being used, calibrate the pH sensor (see Section 14) and place it in the process liquid. If manual pH correction is being used, measure the pH of the process liquid and enter the value (see Section 7.4). Adjust the sample flow until it is within the range recommended for the chlorine sensor. Refer to the sensor instruction sheet. 2.
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MODEL XMT-A-FF/FI SECTION 10.0 CALIBRATION - FREE CHLORINE 10.4 DUAL SLOPE CALIBRATION Figure 10.2 shows the principle of dual slope calibration. Between zero and concentration C1, the sensor response is linear. When the concentration of chlorine becomes greater than C1, the response is non-linear. In spite of the non-linearity, the sensor response between C1 and C2 can be approximated by a straight line. Dual slope calibration is rarely needed. It is probably useful in fewer than 5% of applications. 1.
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MODEL XMT-A-FF/FI SECTION 10.0 CALIBRATION - FREE CHLORINE Possible ZeroErr Proceed? Yes No 9. This screen appears if the zero current is moderately high. To continue, choose Yes. To repeat the zero step, choose No. See Section 15 for troubleshooting. 10. If the sensor was just zeroed, place it in the process liquid. If automatic pH correction is being used, calibrate the pH sensor (see Section 14) and place it in the process liquid.
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MODEL XMT-A-FF/FI SECTION 11.0 CALIBRATION - TOTAL CHLORINE SECTION 11.0 CALIBRATION — TOTAL CHLORINE 11.1 INTRODUCTION Total chlorine is the sum of free and combined chlorine. The continuous determination of total chlorine requires two steps. See Figure 11-1. First, the sample flows into a conditioning system (SCS 921A) where a pump continuously adds acetic acid and potassium iodide to the sample.
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MODEL XMT-A-FF/FI SECTION 11.0 CALIBRATION - TOTAL CHLORINE 11.2 PROCEDURE — ZEROING THE SENSOR 1. Complete the startup sequence described in the SCS921A instruction manual. 2. Remove the reagent uptake tube from the reagent bottle and let it dangle in air. The peristaltic pump will simply pump air into the sample. 3. Let the system run until the sensor current is stable. The sensor current will drop rapidly at first and then gradually reach a stable zero value.
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MODEL XMT-A-FF/FI SECTION 11.0 CALIBRATION - TOTAL CHLORINE 11.3 PROCEDURE — FULL SCALE CALIBRATION 1. If the sensor was just zeroed, place the reagent uptake tube back in the bottle. Once the flow of reagent starts, it takes about one minute for the sensor current to begin to increase. It may take an hour or longer for the reading to stabilize. 2. Adjust the chlorine concentration until it is near the upper end of the operating range.
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MODEL XMT-A-FF/FI SECTION 11.0 CALIBRATION - TOTAL CHLORINE 11.4 DUAL SLOPE CALIBRATION Figure 11-3 shows the principle of dual slope calibration. Between zero and concentration C1, the sensor response is linear. When the concentration of chlorine becomes greater than C1, the response is non-linear. In spite of the non-linearity, the sensor response between C1 and C2 can be approximated by a straight line. Dual slope calibration is rarely needed. It is probably useful in fewer than 5% of applications. 1.
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MODEL XMT-A-FF/FI SECTION 11.0 CALIBRATION - TOTAL CHLORINE Possible ZeroErr Proceed? Yes No 9. This screen appears if the zero current is moderately high. To continue, choose Yes. To repeat the zero step, choose No. See Section 15 for troubleshooting. 10. If the sensor was just zeroed, place the reagent uptake tube back in the reagent bottle. Once the flow of reagent starts, it takes about one minute for the sensor current to begin to increase.
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MODEL XMT-A-FF/FI SECTION 12.0 CALIBRATION - MONOCHLORAMINE SECTION 12.0 CALIBRATION - MONOCHLORAMINE 12.1 INTRODUCTION As Figure 12-1 shows, a monochloramine sensor generates a current directly proportional to the concentration of monochloramine in the sample. Calibrating the sensor requires exposing it to a solution containing no monochloramine (zero standard) and to a solution containing a known amount of monochloramine (full-scale standard).
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MODEL XMT-A-FF/FI SECTION 12.0 CALIBRATION - MONOCHLORAMINE 12.2 PROCEDURE — ZEROING THE SENSOR 1. Place the sensor in the zero standard (see Section 10.1). Be sure no air bubbles are trapped against the membrane. The sensor current will drop rapidly at first and then gradually reach a stable zero value. To monitor the sensor current, go to the main display and press until the input current screen appears. Note the units: nA is nanoamps, µA is microamps.
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MODEL XMT-A-FF/FI SECTION 12.0 CALIBRATION - MONOCHLORAMINE 12.3 PROCEDURE — FULL SCALE CALIBRATION 1. Place the sensor in the process liquid. Adjust the sample flow until it is within the range recommended for the sensor. Refer to the sensor instruction sheet. 2. Adjust the chlorine concentration until it is near the upper end of the operating range. Wait until the transmitter reading is stable before starting the calibration. Calibrate Sim. PV Program Display Cal? Chlorine 4. Choose Chlorine.
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MODEL XMT-A-FF/FI SECTION 13.0 CALIBRATION - OZONE SECTION 13.0 CALIBRATION — OZONE 13.1 INTRODUCTION As Figure 13-1 shows, an ozone sensor generates a current directly proportional to the concentration of ozone in the sample. Calibrating the sensor requires exposing it to a solution containing no ozone (zero standard) and to a solution containing a known amount of ozone (full-scale standard).
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MODEL XMT-A-FF/FI SECTION 13.0 CALIBRATION - OZONE 13.2 PROCEDURE — ZEROING THE SENSOR 1. Place the sensor in the zero standard (see Section 10.1). Be sure no air bubbles are trapped against the membrane. The sensor current will drop rapidly at first and then gradually reach a stable zero value. To monitor the sensor current, go to the main display and press until the input current screen appears. Note the units: nA is nanoamps, µA is microamps.
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MODEL XMT-A-FF/FI SECTION 13.0 CALIBRATION - OZONE 13.3 PROCEDURE — FULL SCALE CALIBRATION 1. Place the sensor in the process liquid. Adjust the sample flow until it is within the range recommended for the sensor. Refer to the sensor instruction sheet. 2. Adjust the ozone concentration until it is near the upper end of the operating range. Wait until the transmitter reading is stable before starting the calibration. Calibrate Sim. PV Program Display Cal? Ozone 4. Choose Ozone. Temp 5.
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MODEL XMT-A-FF/FI SECTION 14.0 CALIBRATION - pH SECTION 14.0 CALIBRATION — pH 14.1 INTRODUCTION A new pH sensor must be calibrated before use. Regular recalibration is also necessary. A pH measurement cell (pH sensor and the solution to be measured) can be pictured as a battery with an extremely high internal resistance. The voltage of the battery depends on the pH of the solution.
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MODEL XMT-A-FF/FI SECTION 14.0 CALIBRATION - pH 14.2 PROCEDURE — AUTO CALIBRATION 1. Obtain two buffer solutions. Ideally, the buffer values should bracket the range of pH values to be measured. 2. Remove the pH sensor from the process liquid. If the process and buffer temperatures are appreciably different, place the sensor in a container of tap water at the buffer temperature. Do not start the calibration until the sensor has reached the buffer temperature. Thirty minutes is usually adequate.
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MODEL XMT-A-FF/FI SECTION 14.0 CALIBRATION - pH Live 10.01pH AutoBuf2 10.01pH Cal in progess. 14. The top line shows the actual reading. The transmitter also identifies the buffer and displays the nominal buffer value (buffer pH at 25°C). If the displayed value is not correct, press or to display the correct value. The nominal value will change, for example from 7.01 to 6.86 pH. Press ENTER to store. 15. The screen at left appears momentarily. Please wait. Offset 0mV 59.
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MODEL XMT-A-FF/FI SECTION 14.0 CALIBRATION - pH 14.3 PROCEDURE — MANUAL TWO-POINT CALIBRATION 1. Obtain two buffer solutions. Ideally, the buffer values should bracket the range of pH values to be measured. 2. Remove the pH sensor from the process liquid. If the process and buffer temperatures are appreciably different, place the sensor in a container of tap water at the buffer temperature. Do not start the calibration until the sensor has reached the buffer temperature.
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MODEL XMT-A-FF/FI SECTION 14.0 CALIBRATION - pH 14.4 PROCEDURE — STANDARDIZATION 1. The pH measured by the transmitter can be changed to match the reading from a second or referee instrument. The process of making the two readings agree is called standardization. 2. During standardization, the difference between the two values is converted to the equivalent voltage. The voltage, called the reference offset, is added to all subsequent measured cell voltages before they are converted to pH.
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MODEL XMT-A-FF/FI SECTION 14.0 CALIBRATION - pH 14.5 PROCEDURE — ENTERING A KNOWN SLOPE VALUE. 1. If the electrode slope is known from other measurements, it can be entered directly into the transmitter. The slope must be entered as the slope at 25°C. To calculate the slope at 25°C from the slope at temperature t°C, use the equation: slope at 25°C = (slope at t°C) 298 t°C + 273 Changing the slope overrides the slope determined from the previous buffer calibration. Calibrate Sim.
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MODEL XMT-A-FF/FI SECTION 15.0 TROUBLESHOOTING SECTION 15.0 TROUBLESHOOTING 15.1 OVERVIEW The Xmt-A-FF transmitter continuously monitors itself and the sensor for problems. If the transmitter detects a problem, the word "fault" or "warn" appears in the main display alternating with the measurement. A fault condition means the measurement is seriously in error and is not to be trusted. A fault condition might also mean that the transmitter has failed. Fault conditions must be corrected immediately.
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MODEL XMT-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.2 TROUBLESHOOTING WHEN A FAULT OR WARNING MESSAGE IS SHOWING Fault message Explanation See Section RTD Open RTD measuring circuit is open 15.2.1 RTD W Overrange RTD resistance is outside the range for Pt 100 or 22kNTC 15.2.1 Broken pH Glass pH sensing element in pH sensor is broken 15.2.2 pH Glass Z High pH glass impedance exceeds programmed level 15.2.2 ADC Read Error Analog to digital converter failed 15.2.
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MODEL XMT-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.2.2 Broken pH Glass and pH Glass Z High These messages mean that the pH sensor glass impedance is outside the programmed limits. To read the impedance go to the main display and press until Glass Imp appears in the display. The default lower limit is 10 MΩ. The default upper limit is 1000 MΩ. Low glass impedance means the glass membrane — the sensing element in a pH sensor — is cracked or broken.
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MODEL XMT-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.2.5 Need Zero Cal Need Zero Cal means the measured concentration is a large negative number. The transmitter subtracts the zero current from the measured current before converting the result to a concentration reading. If the zero current is much greater than the measured current, the concentration reading will be negative. 1. Check the zero current and the present sensor current.
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MODEL Xmt-A-F/FI SECTION 15.0 TROUBLESHOOTING 15.2.11 EE Buffer Overflow EE Buffer Overflow means the software is trying to change too many background variables at once. Remove power from the transmitter for about 30 seconds. If the warning message does not disappear once power is restored, call the factory for assistance. 15.2.12 EE Chksum Error EE Chksum Error means a software setting changed when it was not supposed to. The EEPROM may be going bad. Call the factory for assistance. 15.2.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.4.1 Zero current is too high A. Is the sensor properly wired to the analyzer? See Section 3.0. B. Is the membrane completely covered with zero solution and are air bubbles not trapped against the membrane? Swirl and tap the sensor to release air bubbles. C. Is the zero solution fresh and properly made? Zero the sensor in a solution of 5% sodium sulfite in water. Prepare the solution immediately before use. It has a shelf life of only a few days. D.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.4.5 Process readings are erratic. A. Readings are often erratic when a new sensor or a rebuilt sensor is first placed in service. The current usually stabilizes after a few hours. B. Is the sample flow within the recommended range? High sample flow may cause erratic readings. Refer to the sensor instruction manual for recommended flow rates. C. Gas bubbles impinging on the membrane may cause erratic readings.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.
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MODEL Xmt-A-FF/FI SECTION 14.0 TROUBLESHOOTING 15.5.3 Sensor can be calibrated, but the current is too low A. Is the temperature low or is the pH high? Sensor current is a strong function of pH and temperature. The sensor current decreases about 3% for every °C drop in temperature. Sensor current also decreases as pH increases. Above pH 7, a 0.1 unit increase in pH lowers the current about 5%. B. Sensor current depends on the rate of sample flow past the sensor tip.
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MODEL Xmt-A-FF/Fi SECTION 15.0 TROUBLESHOOTING 15.5.6 Sensor does not respond to changes in chlorine level. A. Is the grab sample test accurate? Is the grab sample representative of the sample flowing to the sensor? B. Is the pH compensation correct? If the controller is using manual pH correction, verify that the pH value in the controller equals the actual pH to within ±0.1 pH. If the controller is using automatic pH correction, check the calibration of the pH sensor. C.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.7.3 Sensor can be calibrated, but the current is too low A. Is the temperature low? The sensor current decreases about 5% for every °C drop in temperature. B. Sensor current depends on the rate of sample flow past the sensor tip. If the flow is too low, monochloramine readings will be low. Refer to the sensor instruction sheet for recommended sample flows. C. Low current can be caused by lack of electrolyte flow to the cathode and membrane.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.7.7 Readings are too low. A. Was the sample tested as soon as it was taken? Monochloramine solutions are moderately unstable. Test the sample immediately after collecting it. Avoid exposing the sample to sunlight. B. When was the sensor fill solution last replaced? The monochloramine sensor loses sensitivity, that is, it generates less current per ppm of monochloramine, as it operates.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.8.4 Process readings are erratic A. Readings are often erratic when a new sensor or a rebuilt sensor is first placed in service. The current usually stabilizes after a few hours. B. Is the sample flow within the recommended range? High sample flow may cause erratic readings. Refer to the sensor instruction sheet for recommended flow rates. C. Are the holes between the membrane and the electrolyte reservoir open. Refer to Section 15.8.2. D.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.9 TROUBLESHOOTING WHEN NO FAULT MESSAGE IS SHOWING - pH Problem Warning or error message during two-point calibration Warning or error message during standardization Controller will not accept manual slope Sensor does not respond to known pH changes Calibration was successful, but process pH is slightly different from expected value Calibration was successful, but process pH is grossly wrong and/or noisy Process reading is noisy See Section 15.9.1 15.9.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.9.2 Warning or error message during two-point calibration. During standardization, the millivolt signal from the pH cell is increased or decreased until it agrees with the pH reading from a reference instrument. A unit change in pH requires an offset of about 59 mV. The controller limits the offset to ±1400 mV. If the standardization causes an offset greater than ±1400 mV, the analyzer will display the Calibration Error screen.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.9.6 Calibration was successful, but process pH is grossly wrong and/or noisy. Grossly wrong or noisy readings suggest a ground loop (measurement system connected to earth ground at more than one point), a floating system (no earth ground), or noise being brought into the analyzer by the sensor cable. The problem arises from the process or installation. It is not a fault of the analyzer.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.10 TROUBLESHOOTING NOT RELATED TO MEASUREMENT PROBLEMS Problem Action Display too light or too dark Change contrast (see Section 7.8.3) “Enter Security Code” shown in display Transmitter has password protection (see Sections 5.3 and 7.5) 15.11 SIMULATING INPUTS - DISSOLVED OXYGEN To check the performance of the controller, use a decade box to simulate the current from the oxygen sensor. A.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.12 SIMULATING INPUTS - OTHER AMPEROMETRIC MEASUREMENTS To check the performance of the controller, use a decade box and a battery to simulate the current from the sensor. The battery, which opposes the polarizing voltage, is necessary to ensure that the sensor current has the correct sign. A. Disconnect the anode and cathode leads from terminals 1 and 2 on TB3 and connect a decade box and battery as shown in Figure 15-2.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.13 SIMULATING INPUTS - pH 15.13.1 General This section describes how to simulate a pH input into the transmitter. To simulate a pH measurement, connect a standard millivolt source to the transmitter. If the transmitter is working properly, it will accurately measure the input voltage and convert it to pH. Although the general procedure is the same, the wiring details depend on whether the preamplifier is in the sensor, a junction box, or the transmitter.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.14 SIMULATING TEMPERATURE 15.14.1 General. The Xmt-A-FF controller accepts either a Pt100 RTD (for pH, 499ADO, 499ATrDO, 499ACL-01, 499ACL-02, 499ACL-03, and 499AOZ sensors) or a 22k NTC thermistor (for Hx438 and Gx448 DO sensors and most steamsterilizable DO sensors from other manufacturers). The Pt100 RTD is in a three-wire configuration. See Figure 154. The 22k thermistor has a two-wire configuration. 15.14.
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MODEL Xmt-A-FF/FI SECTION 15.0 TROUBLESHOOTING 15.15 MEASURING REFERENCE VOLTAGE Some processes contain substances that poison or shift the potential of the reference electrode. Sulfide is a good example. Prolonged exposure to sulfide converts the reference electrode from a silver/silver chloride electrode to a silver/silver sulfide electrode. The change in reference voltage is several hundred millivolts.
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MODEL Xmt-A-FF/FI SECTION 16.0 MAINTENANCE SECTION 16.0 MAINTENANCE 16.1 OVERVIEW The Solu Comp Xmt needs little routine maintenance. The calibration of the analyzer and sensor should be checked periodically. To recalibrate the sensor and analyzer, refer to sections 9 through 14. 16.2 REPLACEMENT PARTS Only a few components of the analyzer are replaceable. Refer to the tables below. Circuit boards, display, and enclosure are not replaceable. TABLE 16-1.
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MODEL Xmt-A-FF/FI SECTION 17.0 RETURN OF MATERIAL SECTION 17.0 RETURN OF MATERIAL 17.1 GENERAL. To expedite the repair and return of instruments, proper communication between the customer and the factory is important. Before returning a product for repair, call 1-949-757-8500 for a Return Materials Authorization (RMA) number. 17.2 WARRANTY REPAIR. The following is the procedure for returning instruments still under warranty: 1. Call Rosemount Analytical for authorization. 2.
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MODEL Xmt-A-FF/FI APPENDIX A APPENDIX A BAROMETRIC PRESSURE AS A FUNCTION OF ALTITUDE The table shows how barometric pressure changes with altitude. Pressure values do not take into account humidity and weather fronts. Altitude Barometric Pressure m ft bar mm Hg in Hg kPa 0 0 1.013 760 29.91 101.3 250 820 0.983 737 29.03 98.3 500 1640 0.955 716 28.20 95.5 750 2460 0.927 695 27.37 92.7 1000 3280 0.899 674 26.55 89.9 1250 4100 0.873 655 25.77 87.3 1500 4920 0.
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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.