Model Solu Comp Xmt-P - Emerson Electric...iii MODEL XMT-P pH/ORP TABLE OF CONTENTS TABLE OF...

Model Solu Comp Xmt-PpH, ORP, and Redox Transmitter

Instruction ManualPN 51-Xmt-P/rev.EOctober 2007

Emerson Process Management

Liquid Division2400 Barranca ParkwayIrvine, CA 92606 USATel: (949) 757-8500Fax: (949) 474-7250

http://www.raihome.com

© Rosemount Analytical Inc. 2006

ESSENTIAL INSTRUCTIONSREAD THIS PAGE BEFORE PROCEEDING!

Rosemount Analytical designs, manufactures, and tests its products to meet many national and internationalstandards. Because these instruments are sophisticated technical products, you must properly install, use, andmaintain them to ensure they continue to operate within their normal specifications. The following instructionsmust be adhered to and integrated into your safety program when installing, using, and maintaining RosemountAnalytical products. Failure to follow the proper instructions may cause any one of the following situations tooccur: Loss of life; personal injury; property damage; damage to this instrument; and warranty invalidation.

• Read all instructions prior to installing, operating, and servicing the product. If this Instruction Manual is not thecorrect manual, telephone 1-800-654-7768 and the requested manual will be provided. Save this InstructionManual for future reference.

• If you do not understand any of the instructions, contact your Rosemount representative for clarification.

• Follow all warnings, cautions, and instructions marked on and supplied with the product.

• Inform and educate your personnel in the proper installation, operation, and maintenance of the product.

• Install your equipment as specified in the Installation Instructions of the appropriate Instruction Manual and perapplicable local and national codes. Connect all products to the proper electrical and pressure sources.

• To ensure proper performance, use qualified personnel to install, operate, update, program, and maintain theproduct.

• When replacement parts are required, ensure that qualified people use replacement parts specified byRosemount. Unauthorized parts and procedures can affect the product’s performance and place the safeoperation of your process at risk. Look alike substitutions may result in fire, electrical hazards, or improperoperation.

• Ensure that all equipment doors are closed and protective covers are in place, except when maintenance isbeing performed by qualified persons, to prevent electrical shock and personal injury.

NOTICEIf a Model 375 Universal Hart® Communicator is used with these transmitters, the software within the Model 375 may requiremodification. If a software modification is required, please contact your local Emerson Process Management Service Groupor National Response Center at 1-800-654-7768.

About This Document

This manual contains instructions for installation and operation of the Model Xmt-P Two-Wire pH/ORPTransmitter. The following list provides notes concerning all revisions of this document.

Rev. Level Date Notes

A 3/05 This is the initial release of the product manual. The manual has been

reformatted to reflect the Emerson documentation style and updated to reflect any changes in the product offering. This manual contains information on HART Smart and FOUNDATION Fieldbus versions of Model Solu Comp Xmt-P.

B 9/05 Revise panel mount drawing. Add Foundation fieldbus agency approvals and FISCO version.

C 2/06 Revised the case specification on page 2. Added new drawings of FF and FI on section 4.0, pages 29-46.

D 6/06 Revised Quick Start choices adding language as #5. Added Language

box to page 5. Deleted 230A in accessories chart on page 10.

E 10/07 Added M Certs to page 2.

5. Choose the desired language. Choose >> to show more choices.

6. Choose measurement: pH, ORP, or Redox.

7. Choose preamplifier location. Select Xmtr to use the integral preamplifier in thetransmitter; select Sensor/JBox if your sensor has an integral preamplifier or ifyou are using a remote preamplifier located in a junction box.

8. Choose temperature units: °C or °F.

9. To change output settings, to scale the 4-20 mA output, to change measure-ment-related settings from the default values, and to set security codes, pressMENU. Select Program and follow the prompts. Refer to the appropriate menutree (page 5 or 6).

9. To return the transmitter to default settings, choose ResetAnalyzer in theProgram menu.

Measure? pH

Redox ORP

Use Preamp in?

Xmtr Sensor/JBox

Temperature in?

°C °F

1. Refer to page 11 for installation instructions.

2. Wire pH or ORP sensor to the transmitter. See Figure 2-3 for panel mount; Figure 2-4 or 2-5 for pipe or surfacemount. Refer to the sensor instruction sheet for details.

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 t or u key to move the cursor left or right. Use the p or q key to move the cursor up or down or toincrease or decrease the value of a digit. Use the p or q key to move the decimal point.

c. Press ENTER to store a setting. Press EXIT to leave without storing changes. Pressing EXIT also returns thedisplay to the previous screen.

QUICK START GUIDEFOR MODEL SOLU COMP Xmt-P TRANSMITTER

English Français

Español >>

i

MODEL XMT-P pH/ORP TABLE OF CONTENTS

MODEL XMT-P pH/ORP TWO-WIRE TRANSMITTER

TABLE OF CONTENTSSection Title Page

1.0 DESCRIPTION AND SPECIFICATIONS ................................................................ 1

1.1 Features and Applications........................................................................................ 11.2 Specifications ........................................................................................................... 21.3 Hazardous Location Approval .................................................................................. 41.4 Menu Tree for Model Xmt-P-HT............................................................................... 51.5 Menu Tree for Model Xmt-P-FF ............................................................................... 61.6 HART Communications............................................................................................ 71.7 FOUNDATION Fieldbus .............................................................................................. 71.8 Asset Management Solutions ................................................................................. 81.9 Ordering Information ............................................................................................... 101.10 Accessories ............................................................................................................. 10

2.0 INSTALLATION ....................................................................................................... 11

2.1 Unpacking and Inspection........................................................................................ 112.2 Pre-Installation Set Up ............................................................................................. 112.3 Installation................................................................................................................ 13

3.0 WIRING.................................................................................................................... 17

3.1 Power Supply / Current Loop — Model Xmt-P-HT .................................................. 17 3.2 Power Supply Wiring for Model Xmt-P-FF ............................................................... 183.2 Sensor Wiring .......................................................................................................... 19

4.0 INTRINSICALLY SAFE INSTALLATION................................................................. 20

5.0 DISPLAY AND OPERATION ................................................................................... 47

5.1 Display ..................................................................................................................... 475.2 Keypad..................................................................................................................... 475.3 Programming and Calibrating the Model Xmt — Tutorial......................................... 485.4 Menu Trees - pH ...................................................................................................... 495.5 Diagnostic Messages - pH ....................................................................................... 495.6 Security .................................................................................................................... 525.7 Using Hold ............................................................................................................... 52

6.0 OPERATION WITH MODEL 375............................................................................. 53

6.1 Note on Model 375 HART and Foundation Fieldbus Communicator ....................... 536.2 Connecting the HART and Foundation Fieldbus Communicator ............................. 536.3 Operation ................................................................................................................. 54

7.0 PROGRAMMING THE TRANSMITTER.................................................................. 69

7.1 General .................................................................................................................... 697.2 Changing Start-up Settings ...................................................................................... 697.3 Configuring and Ranging the Output ....................................................................... 707.4 Choosing and Configuring the Analytical Measurement .......................................... 737.5 Choosing Temperature Units and Manual or Auto Temperature Compensation ...... 757.6 Setting a Security Code ........................................................................................... 767.7 Making HART-Related Settings ............................................................................... 777.8 Noise Reduction....................................................................................................... 777.9 Resetting Factory Calibration and Factory Default Settings .................................... 777.10 Selecting a Default Screen and Screen Contrast .................................................... 78


TABLE OF CONTENTS CONT’D

ii

8.0 CALIBRATION — TEMPERATURE........................................................................ 79

8.1 Introduction .............................................................................................................. 798.2 Calibrating Temperature........................................................................................... 79

9.0 CALIBRATION — pH ............................................................................................. 81

9.1 Introduction .............................................................................................................. 819.2 Procedure — Auto Calibration ................................................................................. 829.3 Procedure — Manual Two-Point Calibration............................................................ 849.4 Procedure — Standardization .................................................................................. 859.5 Procedure — Entering a Known Slope Value .......................................................... 869.6 ORP Calibration ....................................................................................................... 87

10.0 TROUBLESHOOTING ........................................................................................... 88

10.1 Overview .................................................................................................................. 8810.2 Troubleshooting When a Fault or Warning Message is Showing ............................ 8910.3 Troubleshooting When No Fault Message is Showing — Temp.............................. 9210.4 Troubleshooting When No Fault Message is Showing — HART............................. 9210.5 Troubleshooting When No Fault Message is Showing — pH .................................. 9210.6 Troubleshooting Not Related to Measurement Problems ........................................ 9510.7 Simulating Inputs — pH ........................................................................................... 9510.8 Simulating Temperature ........................................................................................... 9610.9 Measuring Reference Voltage.................................................................................. 97

11.0 MAINTENANCE ...................................................................................................... 98

11.1 Overview .................................................................................................................. 9811.2 Replacement Parts .................................................................................................. 98

12.0 pH MEASUREMENTS............................................................................................. 99

12.1 General .................................................................................................................... 9912.2 Measuring Electrode ................................................................................................ 10012.3 Reference Electrode ................................................................................................ 10012.4 Liquid Junction Potential .......................................................................................... 10112.5 Converting Voltage to pH ......................................................................................... 10112.6 Glass Electrode Slope ............................................................................................. 10212.7 Buffers and Calibration ............................................................................................ 10212.8 Isopotential pH ......................................................................................................... 10312.9 Junction Potential Mismatch .................................................................................... 10312.10 Sensor Diagnostics .................................................................................................. 10412.11 Shields, Insulation, and Preamplifiers...................................................................... 104

continued on following page

iii


TABLE OF CONTENTS CONT’D

13.0 ORP MEASUREMENTS.......................................................................................... 105

13.1 General .................................................................................................................... 10513.2 Measuring Electrode ................................................................................................ 10613.3 Reference Electrode ................................................................................................ 10613.4 Liquid Junction Potential .......................................................................................... 10613.5 Relating Cell Voltage to ORP................................................................................... 10713.6 ORP, Concentration, and pH.................................................................................... 10713.7 Interpreting ORP Measurements ............................................................................. 10813.8 Calibration................................................................................................................ 109

14.0 THEORY — REMOTE COMMUNICATIONS........................................................... 111

14.1 Overview of HART Communications........................................................................ 11114.2 HART Interface Devices........................................................................................... 11114.3 Asset Management Solutions .................................................................................. 112

15.0 RETURN OF MATERIAL......................................................................................... 113

LIST OF TABLES

Number Title Page

11-1 Replacement Parts for Model Xmt-P — Panel Mount Version ................................ 9811-2 Replacement Parts for Model Xmt-P — Pipe/Surface Mount Version ..................... 98

iv


LIST OF FIGURESNumber Title Page

1-1 Menu Tree — Xmt-P-HT........................................................................................... 51-2 Menu Tree — Xmt-P-FF ........................................................................................... 61-3 Configuring Model XMT Transmitter with FOUNDATION Fieldbus.............................. 71-4 HART Communicators.............................................................................................. 81-5 AMS Main Menu Tools ............................................................................................. 92-1 Removing the Knockouts ......................................................................................... 132-2 Power Supply / Current Loop Wiring ........................................................................ 132-3 Panel Mount Installation ........................................................................................... 142-4 Pipe Mount Installation ............................................................................................. 152-5 Surface Mount Installation........................................................................................ 163-1 Load/Power Supply Requirements........................................................................... 173-2 Power Supply / Current Loop Wiring ........................................................................ 173-3 Typical Fieldbus Network Electrical Wiring Configuration ........................................ 183-4 Loop Power and Sensor Wiring................................................................................ 183-5 Wiring and Preamplifier Configurations for pH and ORP Sensors ........................... 194-1 FM Intrinsically Safe Label for Model XMT-P-HT ..................................................... 204-2 FM Intrinsically Safe Installation for Model XMT-P-HT (1 of 2) ................................ 214-3 FM Intrinsically Safe Installation for Model XMT-P-HT (2 of 2) ................................ 224-4 CSA Intrinsically Safe Label for Model XMT-P-HT ................................................... 234-5 CSA Intrinsically Safe Installation for Model XMT-P-HT (1 of 2) .............................. 244-6 CSA Intrinsically Safe Installation for Model XMT-P-HT (2 of 2) .............................. 254-7 ATEX Intrinsically Safe Label for Model XMT-P-HT ................................................. 264-8 ATEX Intrinsically Safe Installation for Model XMT-P-HT (1 of 2) ............................ 274-9 ATEX Intrinsically Safe Installation for Model XMT-P-HT (2 of 2) ............................ 284-10 FM Intrinsically Safe Label for Model XMT-P-FF...................................................... 294-11 FM Intrinsically Safe Installation for Model XMT-P-FF (1 of 2) ................................ 304-12 FM Intrinsically Safe Installation for Model XMT-P-FF (2 of 2) ................................ 314-13 CSA Intrinsically Safe Label for Model XMT-P-FF.................................................... 324-14 CSA Intrinsically Safe Installation for Model XMT-P-FF (1 of 2) .............................. 334-15 CSA Intrinsically Safe Installation for Model XMT-P-FF (2 of 2) .............................. 344-16 ATEX Intrinsically Safe Label for Model XMT-P-FF.................................................. 354-17 ATEX Intrinsically Safe Installation for Model XMT-P-FF (1 of 2) ............................ 364-18 ATEX Intrinsically Safe Installation for Model XMT-P-FF (2 of 2) ............................ 374-19 FM Intrinsically Safe Label for Model XMT-P-FI....................................................... 384-20 FM Intrinsically Safe Installation for Model XMT-P-FI (1 of 2) ................................. 394-21 FM Intrinsically Safe Installation for Model XMT-P-FI (2 of 2) ................................. 404-22 CSA Intrinsically Safe Label for Model XMT-P-FI..................................................... 414-23 CSA Intrinsically Safe Installation for Model XMT-P-FI (1 of 2) ............................... 424-24 CSA Intrinsically Safe Installation for Model XMT-P-FI (2 of 2) ............................... 434-25 ATEX Intrinsically Safe Label for Model XMT-P-FI ................................................... 444-26 ATEX Intrinsically Safe Installation for Model XMT-P-FI (1 of 2) ............................. 454-27 ATEX Intrinsically Safe Installation for Model XMT-P-FI (2 of 2) ............................. 465-1 Displays During Normal Operation........................................................................... 295-2 Solu Comp Xmt Keypad ........................................................................................... 295-3 Menu Tree for Model Xmt-P-HT ............................................................................... 325-4 Menu Tree for Model Xmt-P-FF................................................................................ 336-1 Connecting the Model 375 Communicator .............................................................. 356-2 XMT-P-HT HART / Model 375 Menu Tree................................................................ 376-3 XMT-P-HT Foundation Fieldbus / Model 375 Menu Tree......................................... 39

v

9-1 Calibration Slope and Offset .................................................................................... 6310-1 Simulate pH.............................................................................................................. 7710-2 Three-Wire RTD Configuration................................................................................. 7810-3 Simulating RTD Inputs ............................................................................................. 7810-4 Checking for a Poisoned Reference Electrode ........................................................ 7912-1 pH Measurement Cell............................................................................................... 8112-2 Measuring Electrode (pH) ........................................................................................ 8212-3 Cross-Section Through the pH Glass....................................................................... 8212-4 Reference Electrode................................................................................................. 8312-5 The Origin of Liquid Junction Potential..................................................................... 8312-6 Glass Electrode Slope.............................................................................................. 8412-7 Two-Point Buffer Calibration..................................................................................... 8512-8 Liquid Junction Potential Mismatch .......................................................................... 8613-1 ORP Measurement Cell ........................................................................................... 8713-2 Measuring Electrode (ORP) ..................................................................................... 8813-3 Reference Electrode................................................................................................. 8813-4 The Origin of Liquid Junction Potential..................................................................... 8913-5 Electrode Potential ................................................................................................... 8913-6 ORP Measurement Interpretation............................................................................. 9014-1 HART Communicators.............................................................................................. 9314-2 AMS Main Menu Tools ............................................................................................. 94


LIST OF FIGURES CONT’DNumber Title Page

1

MODEL XMT-P pH/ORP SECTION 1.0

DESCRIPTION AND SPECIFICATIONS

SECTION 1.0DESCRIPTION AND SPECIFICATIONS

Model Xmt Family of Two-wire Transmitters

• CHOICE OF COMMUNICATION PROTOCOLS:HART® or FOUNDATION® Fieldbus

• CLEAR, EASY-TO-READ two-line display shows commissioning menusand process measurement displays in English

• SIMPLE TO USE MENU STRUCTURE

• CHOICE OF PANEL OR PIPE/SURFACE MOUNTING

• NON-VOLATILE MEMORY retains program settings and calibrationdata during power failures

• SIX LOCAL LANGUAGES - English, French, German, Italian, Spanish and Portuguese

1.1 FEATURES AND APPLICATIONS

The Solu Comp Model Xmt family of transmitters can beused to measure pH, ORP, conductivity (using either con-tacting or toroidal sensors), resistivity, oxygen (ppm andppb level), free chlorine, total chlorine, monochloramineand ozone in a variety of process liquids. The Xmt is com-patible with most Rosemount Analytical sensors. See theSpecification sections for details.

The transmitter has a rugged, weatherproof, corrosion-resistant enclosure (NEMA 4X and IP65). The panel mountversion fits standard ½ DIN panel cutouts, and its shallowdepth is ideally suited for easy mounting in cabinet-typeenclosures. A panel mount gasket is included to maintainthe weather rating of the panel. Surface/pipe mount enclo-sure includes self-tapping screws for surface mounting. Apipe mounting accessory kit is available for mounting to a2-inch pipe.

The transmitter has a two-line 16-character display. Menuscreens for calibrating and registering choices are simpleand intuitive. Plain language prompts guide the userthrough the procedures. There are no service codes toenter before gaining access to menus.

Two digital communication protocols are available: HART(model option -HT) and FOUNDATION fieldbus (model option-FF or -FI). Digital communications allow access to AMS(Asset Management Solutions). Use AMS to set up andconfigure the transmitter, read process variables, and trou-bleshoot problems from a personal computer or host any-where in the plant.

The seven-button membrane-type keypad allows local pro-gramming and calibrating of the transmitter. The HARTModel 375 communicator can also be used for program-ming and calibrating the transmitter.

The Model Xmt-P Transmitter with the appropriate sensor

measures dissolved oxygen (ppm and ppb level), freechlorine, total chlorine, monochloramine, and ozone inwater and aqueous solutions. The transmitter is compati-ble with Rosemount Analytical 499A amperometric sen-sors for oxygen, chlorine, monochloramine, and ozone;and with Hx438, Bx438, and Gx448 steam-sterilizable oxy-gen sensors.

For free chlorine measurements, both automatic and man-ual pH correction are available. pH correction is necessarybecause amperometric free chlorine sensors respond onlyto hypochlorous acid, not free chlorine, which is the sum ofhypochlorous acid and hypochlorite ion. To measure freechlorine, most competing instruments require an acidifiedsample. Acid lowers the pH and converts hypochlorite ionto hypochlorous acid. The Model Xmt-P eliminates theneed for messy and expensive sample conditioning bymeasuring the sample pH and using it to correct the chlo-rine sensor signal. If the pH is relatively constant, a fixedpH correction can be used, and the pH measurement isnot necessary. If the pH is greater than 7.0 and fluctuatesmore than about 0.2 units, continuous measurement of pHand automatic pH correction is necessary. SeeSpecifications section for recommended pH sensors.Corrections are valid to pH 9.5.

The transmitter fully compensates oxygen, ozone, freechlorine, total chlorine, and monochloramine readings forchanges in membrane permeability caused by tempera-ture changes.

For pH measurements — pH is available with free chlorineonly — the Xmt-P features automatic buffer recognitionand stabilization check. Buffer pH and temperature datafor commonly used buffers are stored in the transmitter.Glass impedance diagnostics warn the user of an aging orfailed pH sensor.

2



1.2 SPECIFICATIONS

1.2.1 GENERAL SPECIFICATIONS

Case: ABS (panel mount), polycarbonate (pipe/wall mount);NEMA 4X/CSA 4 (IP65)

Dimensions Panel (code -10): 6.10 x 6.10 x 3.72 in. (155 x 155 x94.5 mm)

Surface/Pipe (code -11): 6.23 x 6.23 x 3.23 in. (158x 158 x 82 mm); see page 15 for dimensions of pipemounting bracket.

Conduit openings: Accepts PG13.5 or 1/2 in. conduit fit-tings

Ambient Temperature: 32 to 122°F (0 to 50°C). Somedegradation of display above 50°C.

Storage Temperature: -4 to 158°F (-20 to 70°C)

Relative Humidity: 10 to 90% (non-condensing)

Weight/Shipping Weight: 2 lb/3 lb (1 kg/1.5 kg)

Display: Two line, 16-character display. Character height:4.8 mm; first line shows process variable (pH, ORP,conductivity, % concentration, oxygen, ozone, chlo-rine, or monochloramine), second line shows processtemperature and output current. For pH/chlorine com-bination, pH may also be displayed. Fault and warn-ing messages, when triggered, alternate with temper-ature and output readings.

During calibration and programming, messages,prompts, and editable values appear on the two-linedisplay.

Temperature resolution: 0.1°C (≤99.9°C); 1°C (≥100°C)

Hazardous Location Approval: For details, see specifi-cations for the measurement of interest.

RFI/EMI: EN-61326

DIGITAL COMMUNICATIONS:

HART —

Power & Load Requirements: Supply voltage at thetransmitter terminals should be at least 12 Vdc.Power supply voltage should cover the voltagedrop on the cable plus the external load resistorrequired for HART communications (250 Ω mini-mum). Minimum power supply voltage is 12 Vdc.Maximum power supply voltage is 42.4 Vdc. Thegraph shows the supply voltage required tomaintain 12 Vdc (upper line) and 30 Vdc (lowerline) at the transmitter terminals when the cur-rent is 22 mA.

Analog Output: Two-wire, 4-20 mA output withsuperimposed HART digital signal. Fully scalableover the operating range of the sensor.

Output accuracy: ±0.05 mA

FOUNDATION FIELDBUS —

Power & Load Requirements: A power supply volt-age of 9-32 Vdc at 13 mA is required.

Fieldbus Intrinsically Safe COncept/FISCO-compliantversions of Model Xmt Foundation Fieldbus trans-mitters are available.

Solu Comp is a registered trademark of Rosemount Analytical.Xmt is a trademark of Rosemount Analytical.HART is a registered trademark of the HART Communication Foundation. FOUNDATION is a registered trademark of Fieldbus Foundation.

Sira MC070113/00

3



pH/ORP SENSOR DIAGNOSTIC CAPABILITY

320B Glass and Reference330B Glass and Reference320HP-58 Glass only328A Glass only370 Glass only 371 Glass only 372 Glass only 381 pHE-31-41-52 Glass only381+ Glass and Reference385-08-53 Glass only385+ Glass and Reference389-02-54 / 389VP-54 Glass only396-54-62 / 396VP Glass only396P-55 / 396PVP-55 Glass and Reference396R / 396RVP-54 Glass and Reference397-54-62 Glass only 398-54-62 / 398VP-54 Glass only398R-54-62 / 398RVP-54 Glass and Reference399-09-62 / 399VP-09 Glass only399-10 / 399-14 Glass only399-33 noneHx338 Glass onlyHx348 Glass onlyTF396 none

SENSOR COMPATIBILITY CHART

3

1.2.2 FUNCTIONAL SPECIFICATIONS

pH Range: 0 to 14

ORP Range: -1400 to +1400mV

Calibrations/standardization: The automatic bufferrecognition uses stored buffer values and their temper-ature curves for the most common buffer standardsavailable worldwide. The transmitter also performs astabilization check on the sensor in each buffer.

A manual two-point calibration is made by immersingthe sensor in two different buffer solutions and enteringthe pH values. The microprocessor automatically calcu-lates the slope which is used for self-diagnostics. Anerror message will be displayed if the pH sensor isfaulty. This slope can be read on the display and/ormanually adjusted if desired.

An on-line one-point process standardization is accom-plished by entering the pH or ORP value of a grabsample.

Preamplifier Location: A preamplifier must be used toconvert the high impedance pH electrode signal to a lowimpedance signal for transmitter use. The integral pre-amplifier of the Model Xmt-P may be used when thesensor to transmitter distance is less than 15 ft (4.5 m).Locate the preamplifier in the sensor or junction box forlonger distances.

Automatic Temperature Compensation: External 3-wirePt100 RTD or Pt1000 RTD located in the sensor, compen-sates the pH reading for temperature fluctuations.Compensation covers the range -15 to 130°C (5 to 270°F).Manual temperature compensation is also selectable.

Accuracy: ±1.4 mV @ 25°C ±0.01 pH

Repeatability: ±1 mV @ 25°C ±0.01 pH

Diagnostics: The internal diagnostics can detect:

Calibration Error Sensor FailureHigh Temperature Warning CPU FailureLow Temperature Warning Input WarningROM Failure Glass WarningGlass Failure Reference WarningReference Failure

Once one of the above is diagnosed, the display willshow a message describing the problem.

DIGITAL COMMUNICATIONS: HART (pH): PV assigned to pH. SV, TV, and 4V

assignable to pH, temperature, mV, glass imped-ance, reference impedance, or RTD resistance.

HART (ORP): PV assigned to ORP. SV, TV, and 4Vassignable to ORP, temperature, reference imped-ance, or RTD resistance.

Fieldbus (pH): Four AI blocks assigned to pH, tem-perature, reference impedance, and glass imped-ance.

Fieldbus (ORP): Three AI blocks assigned to ORP,temperature, and reference impedance.

Fieldbus (pH and ORP): Execution time 75 msec.One PID block; execution time 150 msec. Devicetype 4085. Device revision 1. Certified to ITK 4.5.

4



1.3 HAZARDOUS LOCATION APPROVALS

Intrinsic Safety:

Class I, II, III, Div. 1

Groups A-G

T4 Tamb = 50°C

Class I, II, III, Div. 1

Groups A-G

T4 Tamb = 50°C

1180 II 1 G

Baseefa04ATEX0213X

EEx ia IIC T4

Tamb = 0°C to 50°C

Non-Incendive:

Class I, Div. 2, Groups A-D

Dust Ignition Proof

Class II & III, Div. 1, Groups E-G

NEMA 4/4X Enclosure

Class I, Div. 2, Groups A-D

Dust Ignition Proof

Class II & III, Div. 1, Groups E-G

NEMA 4/4X Enclosure

T4 Tamb = 50°C

ATEX



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1.7 FOUNDATION FIELDBUS

Figure 1-3 shows a Xmt-P-FF being used to measure and control pH and chlorine levels in drinking water. The figure alsoshows three ways in which Fieldbus communication can be used to read process variables and configure the transmitter.

FIGURE 1-3. CONFIGURING MODEL XMT-P TRANSMITTER WITH FOUNDATION FIELDBUS

1.6 HART COMMUNICATIONS

1.6.1 OVERVIEW OF HART COMMUNICATION

HART (highway addressable remote transducer) is a digital communication system in which two frequencies are superim-posed on the 4 to 20 mA output signal from the transmitter. A 1200 Hz sine wave represents the digit 1, and a 2400 Hzsine wave represents the digit 0. Because the average value of a sine wave is zero, the digital signal adds no dc compo-nent to the analog signal. HART permits digital communication while retaining the analog signal for process control.

The HART protocol, originally developed by Fisher-Rosemount, is now overseen by the independent HARTCommunication Foundation. The Foundation ensures that all HART devices can communicate with one another. For moreinformation about HART communications, call the HART Communication Foundation at (512) 794-0369. The internetaddress is http://www.hartcomm.org.

1.6.2 HART INTERFACE DEVICES

The Model 375 HART Communicator is a hand-held device that provides a common link to all HART SMART instru-ments and allows access to AMS (Asset Management Solutions). Use the HART communicator to set up and control theXmt-P-HT and to read measured variables. Press ON to display the on-line menu. All setup menus are available throughthis menu.

HART communicators allow the user to view measurement data (pH, ORP and temperature), program the transmitter, anddownload information from the transmitter for transfer to a computer for analysis. Downloaded information can also be sentto another HART transmitter. Either a hand-held communicator, such as the Rosemount Model 375, or a computer can beused. HART interface devices operate from any wiring termination point in the 4 - 20 mA loop. A minimum load of 250 ohmsmust be present between the transmitter and the power supply. See Figure 1-4.

If your communicator does not recognize the Model XMT pH/ORP transmitter, the device description library may needupdating. Call the manufacturer of your HART communication device for updates.

Xmt-P-FF

8



FIGURE 1-4. HART Communicators.

Both the Rosemount Model 375 (or 275) 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.

1.8 ASSET MANAGEMENT SOLUTIONS

Asset Management Solutions (AMS) is software that helps plant personnel better monitor the performance of analyticalinstruments, pressure and temperature transmitters, and control valves. Continuous monitoring means maintenance per-sonnel can anticipate equipment failures and plan preventative measures before costly breakdown maintenance isrequired.

AMS uses remote monitoring. The operator, sitting at a computer, can view measurement data, change program settings,read diagnostic and warning messages, and retrieve historical data from any HART-compatible device, including the ModelXMT-P transmitter. Although AMS allows access to the basic functions of any HART compatible device, RosemountAnalytical has developed additional software for that allows access to all features of the Model XMT-P transmitter.

AMS can play a central role in plant quality assurance and quality control. Using AMS Audit Trail, plant operators can trackcalibration frequency and results as well as warnings and diagnostic messages. The information is available to Audit Trailwhether calibrations were done using the infrared remote controller, the Model 375 HART communicator, or AMS software.

AMS operates in Windows 95. See Figure 1-5 for a sample screen. AMS communicates through a HART-compatiblemodem with any HART transmitters, including those from other manufacturers. AMS is also compatible with FOUNDATION™Fieldbus, which allows future upgrades to Fieldbus instruments.

Rosemount Analytical AMS windows provide access to all transmitter measurement and configuration variables. Theuser can read raw data, final data, and program settings and can reconfigure the transmitter from anywhere in the plant.

Model Xmt-P



FIGURE 1-5. AMS MAIN MENU TOOLS

9

10



1.10 ACCESSORIES

POWER SUPPLY: Use the Model 515 Power Supply to provide dc loop power to the transmitter. The Model 515 pro-vides two isolated sources at 24Vdc and 200 mA each. For more information refer to product data sheet 71-515.

ALARM MODULE: The Model 230A alarm Module receives the 4-20 mA signal from the Xmt-P-HT transmitter and acti-vates two alarm relays. High/high, low/low, and high/low are available. Hysteresis (deadband) is also adjustable. Formore information, refer to product data sheet 71-230A.

HART COMMUNICATOR: The Model 375 HART communicator allows the user to view measurement values as well asto program and configure the transmitter. The Model 375 attaches to any wiring terminal across the output loop. Aminimum 250 Ω load must be between the power supply and transmitter. Order the Model 375 communicator fromEmerson Process Management. Call (800) 999-9307.

1.9 ORDERING INFORMATION

The Solu Comp Model Xmt Two-Wire Transmitter is intended for the determination of pH, ORP, or Redox.

ACCESSORIES

MODEL/PN DESCRIPTION

515 DC loop power supply (see product data sheet 71-515)

23820-00 2-in. pipe mounting kit

9240048-00 Stainless steel tag, specify marking

23554-00 Gland fittings PG 13.5, 5 per package

CODE REQUIRED SELECTION

HT Analog 4-20 mA output with superimposed HART digital signal

FF Foundation fieldbus digital output

FI Foundation fieldbus digital output with FISCO


10 Panel mounting enclosure

11 Pipe/Surface mounting enclosure (pipe mounting requires accessory kit PN 23820-00)

CODE AGENCY APPROVALS

60 No approval

67 FM approved intrinsically safe and non-incendive (when used with appropriate sensor and safety barrier)

69 CSA approved intrinsically safe and non-incendive (when used with appropriate sensor and safety barrier)

73 ATEX approved intrinsically safe (when used with appropriate sensor and safety barrier)


P pH/ORP

MODEL

Xmt SMART TWO-WIRE MICROPROCESSOR TRANSMITTER

Xmt-P-HT-10-67 EXAMPLE

11


INSTALLATION

SECTION 2.0INSTALLATION

2.1 Unpacking and Inspection

2.2 Pre-Installation Set Up

2.3 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 isno apparent damage, remove the transmitter. Be sure all items shown on the packing list are present. If items are miss-ing, immediately notify Rosemount Analytical.

Save the shipping container and packaging. They can be reused if it is later necessary to return the transmitter to the factory.

2.2 PRE-INSTALLATION SETUP

2.2.1 Temperature Element

The Model XMT-P pH/ORP transmitter is compatible with sensors having Pt 100 and Pt 1000. Sensors from other manu-facturers may have a Pt 1000 RTD. For Rosemount Analytical sensors, the type of temperature element in the sensor isprinted on the tag attached to the sensor cable. For the majority of sensors manufactured by Rosemount Analytical, theRTD IN lead is red and the RTD RTN lead is white. The Model 328A sensor has no RTD. The Model 320HP system hasa readily identifiable separate temperature element. Resistance at room temperature for common RTDs is given in thetable.

If the resistance is... the temperature element is a

about 110 ohms Pt 100 RTD

about 1100 ohms Pt 1000 RTD

2.2.2 Reference Electrode Impedance

The standard silver-silver chloride reference electrode used in most industrial and laboratory pH electrodes is low imped-ance. EVERY pH and ORP sensor manufactured by Rosemount Analytical has a low impedance reference. Certain spe-cialized applications require a high impedance reference electrode. The transmitter must be re-programmed to recognizethe high impedance reference.

12


INSTALLATION

2.2.3 Preamplifier Location

pH sensors produce a high impedance voltage signal that must be preamplified before use. The signal can be preampli-fied before it reaches the transmitter or it can be preamplified in the transmitter. To work properly, the transmitter must knowwhere preamplification occurs. Although ORP sensors produce a low impedance signal, the voltage from an ORP sensoris amplified the same way as a pH signal.

If the sensor is wired to the transmitter through a junction box, the preamplifier is ALWAYS in either the junction box or thesensor. Junction boxes can be attached to the sensor or installed some distance away. If the junction box is not attachedto the sensor, it is called a remote junction box. In most junction boxes used with the Model XMT-P pH/ORP, a flat, blackplastic box attached to the same circuit board as the terminal strips houses the preamplifier. The preamplifier housing inthe 381+ sensor is crescent shaped.

If the sensor is wired directly to the transmitter, the preamplifier can be in the sensor or in the transmitter. If the sensorcable has a GREEN wire, the preamplifier is in the sensor. If there is no green wire, the sensor cable will contain a coax-ial cable. A coaxial cable is an insulated wire surrounded by a braided metal shield. Depending on the sensor model, thecoaxial cable terminates in either a BNC connector or in a separate ORANGE wire and CLEAR shield.

13


INSTALLATION

2.3 INSTALLATION

1. Although the transmitter is suitable for outdoor use,do not install it in direct sunlight or in areas of extremetemperatures.

2. Install the transmitter in an area where vibrations andelectromagnetic and radio frequency interference areminimized or absent.

3. Keep the transmitter and sensor wiring at least onefoot from high voltage conductors. Be sure there iseasy access to the transmitter.

4. The transmitter is suitable for panel (Figure 2-3), pipe(Figure 2-4), or surface (Figure 2-5) mounting.

5. The transmitter case has two 1/2-inch (PG13.5) con-duit openings and either three or four 1/2-inch knock-outs. The panel mount Xmt-P-HT has four knockouts.The pipe/surface mount transmitter has three knock-outs*. One conduit opening is for the power/outputcable; the other opening is for the sensor cable.

Figure 1 shows how to remove a knockout. Theknockout grooves are on the outside of the case.Place the screwdriver blade on the inside of the caseand align it approximately along the groove. Rap thescrewdriver sharply with a hammer until the groovecracks. Move the screwdriver to an uncracked portionof the groove and continue the process until theknockout falls out. Use a small knife to remove theflash from the inside of the hole.

6. Use weathertight cable glands to keep moisture out tothe transmitter. If conduit is used, plug and seal theconnections at the transmitter housing to preventmoisture from getting inside the instrument.

7. To reduce the likelihood of stress on wiring connec-tions, do not remove the hinged front panel (-11 mod-els) from the base during wiring installation. Allowsufficient wire leads to avoid stress on conductors.

*NEMA plug may be supplied instead of knockout forpipe/surface version.

FIGURE 2-1. Removing the Knockouts

FIGURE 2-2. Power Supply/Current Loop Wiring

14


INSTALLATION

FIGURE 2-3. Panel Mount Installation

Access to the wiring terminals is through the rear cover. Four screws hold the cover in place.

Panel Mounting.

MILLIMETER

INCH

15


INSTALLATION

FIGURE 2-4. Pipe Mount Installation

The front panel is hinged at the bottom. The panel swings down for access to the wiring terminals.

Pipe Mounting.

MILLIMETER

INCH

16


INSTALLATION

FIGURE 2-5. Surface Mount Installation

The front panel is hinged at the bottom. The panel swings down for access to the wiring terminals.

Surface Mounting.

MILLIMETER

INCH

17


WIRING

3.1 POWER SUPPLY/CURRENT LOOP — MODEL XMT-P-HT

3.1.1 Power Supply and Load Requirements.

Refer to Figure 3-1.

The supply voltage must be at least 12.0 Vdc at the transmitter ter-minals. The power supply must be able to cover the voltage drop onthe cable as well as the load resistor (250 Ω minimum) required forHART communications. The maximum power supply voltage is42.0 Vdc. For intrinsically safe installations, the maximum powersupply voltage is 30.0 Vdc. The graph shows load and power sup-ply requirements. The upper line is the power supply voltage need-ed to provide 12 Vdc at the transmitter terminals for a 22 mA cur-rent. The lower line is the power supply voltage needed to provide30 Vdc for a 22 mA current.

The power supply must provide a surge current during the first 80 milliseconds of startup. The maximum current is about24 mA.

For digital communications, the load must be at least 250 ohms. To supply the 12.0 Vdc lift off voltage at the transmitter,the power supply voltage must be at least 17.5 Vdc.

FIGURE 3-1. Load/Power Supply Requirements

FIGURE3-2. Power Supply/Current Loop Wiring

3.1.2 Power Supply-Current Loop

Wiring.

Refer to Figure 3-2.

Run the power/signal wiring throughthe opening nearest TB-2.

For optimum EMI/RFI protection . . .

1. Use shielded power/signal cableand ground the shield at thepower supply.

2. Use a metal cable gland and besure the shield makes good elec-trical contact with the gland.

3. Use the metal backing plate (seeFigure 2-6) when attaching thegland to transmitter enclosure.

The power/signal cable can also beenclosed in an earth-groundedmetal conduit.

Do not run power supply/signalwiring in the same conduit or cabletray with AC power lines or withrelay actuated signal cables. Keeppower supply/signal wiring at least6 ft (2 m) away from heavy electricalequipment.

SECTION 3.0WIRING

18


WIRING

3.2 POWER SUPPLY WIRING FOR MODEL XMT-P-FF

3.2.1 Power Supply Wiring. Refer to Figure 3-3 andFigure 3-4.

Run the power/signal wiring through the opening nearestTB2. Use shielded cable and ground the shield at thepower supply. To ground the transmitter, attach the shieldto TB2-3.

NOTE

For optimum EMI/RFI immunity, the power sup-ply/output cable should be shielded and enclosedin an earth-grounded metal conduit.

Do not run power supply/signal wiring in the same conduitor cable tray with AC power lines or with relay actuatedsignal cables. Keep power supply/signal wiring at least6 ft (2 m) away from heavy electrical equipment.

FIGURE 3-3. Typical Fieldbus Network Electrical

Wiring Configuration

XMT-P pH/ORPTransmitter

XMT-P pH/ORPTransmitter

FIGURE 3-4. Loop Power and Sensor Wiring

Panel Mount Pipe/Surface Mount

19


WIRING

3.3 SENSOR WIRING

3.3.1 Sensor Wiring Information

pH and ORP sensors manufactured by Rosemount Analytical can be wired to the Model XMT-P 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. See Section 7.4.3 for set-up. The transmitter is fac-tory configured with a preamplifier.

1. in the sensor (a, d),

2. in a junction box mounted on the sensor (c),

3. in a remote junction box (e).

4. at the transmitter (b).

NOTE: For 22K NTC RTDs, wire leads to TB1-1 and TB1-3.

3.3.2 General Wiring Configurations

Figure 3-5 illustrates the various wiring arrangements for Xmt-P.

FIGURE 3-5. Wiring and Preamplifier Configurations for pH and ORP Sensors.

The asterisk identifies the location of the preamplifier. In (a) and (b) the sensor is wired directly to the transmitter. The signal is ampli-fied at the sensor (a) or at the transmitter (b). In (c) the sensor is wired through a sensor-mounted junction box to the transmitter.The preamplifier is in the sensor-mounted junction box. In (d) and (e) the sensor is wired through a remote junction box to the trans-mitter. The preamplifier is located in the sensor (d) or the junction box (e).

Refer to the Instruction Sheet provided with each sensor for specific wiring instructions.

20

For FM Intrinsically Safe Label, see Figure 4-1.

For FM Intrinsically Safe Installation, see Figure 4-2.

For CSA Instrinsically Safe Label, see Figure 4-3.

For CSA Instrinsically Safe Installation, see Figure 4-4.

For ATEX Instrinsically Safe Label, see Figure 4-5.

For ATEX Instrinsically Safe Installation, see Figure 4-6.


INTRINSICALLY SAFE INSTALLATION

SECTION 4.0INTRINSICALLY SAFE INSTALLATION

INTRINSICALLY SAFE INSTALLATIONS FOR MODEL XMT-P-HT

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TO

TH

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EN

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La

Li (

SE

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i (S

EN

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AL

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Pi

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PU

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30

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12.0

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I

MO

DE

L N

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01.

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max

(Vdc

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(mH

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A)

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9

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TR

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TER

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ax O

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x IN

: WIm

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:mA

Vm

ax IN

: Vdc

375

MO

DE

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1.0

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(mH

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i (uF

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W

HE

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STA

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G T

HIS

EQ

UIP

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NT.

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SS

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AR

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INS

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13. N

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G W

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RO

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;

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Model Solu Comp Xmt-P - Emerson Electric...iii MODEL XMT-P pH/ORP TABLE OF CONTENTS TABLE OF...

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Transcript of Model Solu Comp Xmt-P - Emerson Electric...iii MODEL XMT-P pH/ORP TABLE OF CONTENTS TABLE OF...