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Emerson Rosemount 8742C Reference Manual

Magnetic flowmeter transmitter with foundation fieldbus and magnetic flowmeter flowtube
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Reference Manual
00809-0100-4793, Rev CA
August 2004
Rosemount 8742C Magnetic Flowmeter
™
Transmitter with F
Fieldbus and
OUNDATION
8700 Series Magnetic Flowmeter Flowtube
P r o d u c t D i s c o n t i n u e d
www.rosemount.com

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Table of Contents

Troubleshooting

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Summary of Contents for Emerson Rosemount 8742C

  • Page 1 Reference Manual 00809-0100-4793, Rev CA August 2004 Rosemount 8742C Magnetic Flowmeter ™ Transmitter with F Fieldbus and OUNDATION 8700 Series Magnetic Flowmeter Flowtube P r o d u c t D i s c o n t i n u e d...
  • Page 3 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Rosemount 8742C Magnetic Flowmeter Transmitter with ™ Fieldbus and 8700 OUNDATION Series Magnetic Flowmeter Flowtube NOTICE Read this manual before working with the product. For personal and system safety, and for optimum product performance, make sure you thoroughly understand the contents before installing, using, or maintaining this product.

  • Page 5: Table Of Contents

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table of Contents SECTION 1 System Description ........1-1 Safety Messages .
  • Page 6 Reference Manual 00809-0100-40793, Rev CA Rosemount 8742C August 2004 SECTION 3 Safety Messages ......... 3-1 Flowtube Handling .
  • Page 7 Ordering Information ........A-22 Rosemount 8742C ........A-22 Rosemount 8705 .
  • Page 8 Reference Manual 00809-0100-40793, Rev CA Rosemount 8742C August 2004 APPENDIX B Approved Manufacturing Locations ......B-1 European Directive Information ......B-1 Product Certifications ATEX Directive .

  • Page 9: System Description

    This manual is designed to assist in the installation and operation of ™ Rosemount 8742C Magnetic Flowmeter Transmitter with F OUNDATION fieldbus and 8700 Series Magnetic Flowmeter Flowtubes. Attempting to install and operate the Rosemount 8705, 8707 High-Signal,...
  • Page 10 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Section 2: Installation • Transmitter Commissioning • Wiring Flowmeter to a Flowtube Section 3: Flowtube Installation • Handling • Mounting • Installation of a Flanged, Wafer, and Sanitary Flowtube Section 4: Configuration •...

  • Page 11: Safety Messages

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 SAFETY MESSAGES Procedures and instructions in this manual may require special precautions to ensure the safety of the personnel performing the operations. Refer to the safety messages listed at the beginning of each section before performing any operations.
  • Page 12 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004...

  • Page 13: Safety Information

    Verify that the operating environment of the flowtube and transmitter is consistent with the appropriate FM or CSA approval. Do not connect a Rosemount 8742C to a non-Rosemount flowtube that is located in an explosive atmosphere. The flowtube liner is vulnerable to handling damage. Never place anything through the flowtube for the purpose of lifting or gaining leverage.

  • Page 14: Transmitter Symbols

    Access to a suitable power source must be ensured. Identify Options and The standard application of the Rosemount 8742C includes a F OUNDATION fieldbus output. Be sure to identify options and configurations that apply to...

  • Page 15: Changing Hardware Switch Settings

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Instructions for changing the hardware switches are provided in “Changing Hardware Switch Settings” on page 2-3. Figure 2-1. Hardware Switches Simulate Enable Transmitter Security Changing Hardware In most cases, it is not necessary to change the setting of the hardware switches.

  • Page 16: Wiring

    Proper electrical installation is necessary to prevent errors due to electrical noise and interference. Before making any electrical connections to the Rosemount 8742C, consider the following standards and be sure to have proper power supply, conduit, and other accessories. Shielded cable must be used for best results in electrically noisy environments.

  • Page 17: Conduit Cables

    (millimeters). Cable Shield Transmitter Coil Input The Rosemount 8742C Magnetic Flowmeter Transmitter is a four-wire device. This wiring section covers supplying power to the flowtube coils through the transmitter. The transmitter coil input power sends a pulsed DC frequency to the flowtube.

  • Page 18: Installation Category

    Clearly label the disconnect or circuit breaker and locate it near the transmitter and per local electrical control. Installation Category The installation category for the Rosemount 8742C is (Overvoltage) Category II. Overcurrent Protection The Rosemount 8742C Flowmeter Transmitter requires overcurrent protection of the supply lines.

  • Page 19: Transmitter Wiring Connection

    Both transmitter covers must be fully engaged to meet explosion proof requirements. Do not remove the transmitter covers in an explosive atmosphere when the transmitter is powered Figure 2-4. Rosemount 8742C Transmitter Field Wiring 6234 ft (1900 m) max (depending upon cable...

  • Page 20: Transmitter To Flowtube Wiring

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Figure 2-5. Power Connections Input Power 90–250 V ac Grounding Lugs Fieldbus Outputs Transmitter to Flanged and wafer flowtubes have two conduit ports as shown in Figures 3-13, 3-14, 3-15, and 3-16. Either one may be used for both the coil drive and Flowtube Wiring electrode cables.

  • Page 21: Flowtube To Remote Mount Transmitter Connections

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table 2-2. Cable Requirements Description Part Number Signal Cable (20 AWG) Belden 8762, Alpha 2411 equivalent 08712-0061-0001 Coil Drive Cable (14 AWG) Belden 8720, Alpha 2442 equivalent 08712-0060-0001 Combination Signal and Coil Drive Cable (18 AWG)

  • Page 22: Flowtube To Integral Mount Transmitter Connections

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table 2-3. Flowtube to Remote Mount Transmitter Rosemount 8712D/H Transmitters Rosemount 8705/8707/8711 Flowtubes Flowtube to Integral Connect coil drive and electrode cables as shown in Figure 2-8. Mount Do not connect ac power to the flowtube or to terminals 1 and 2 of the Transmitter Connections transmitter, or replacement of the electronics board will be necessary.

  • Page 23: Safety Messages

    Verify that the operating environment of the flowtube and transmitter is consistent with the appropriate hazardous area approval. Do not connect a Rosemount 8742C to a non-Rosemount flowtube that is located in an explosive atmosphere. www.rosemount.com...
  • Page 24 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Explosions could result in death or serious injury: Installation of this transmitter in an explosive environment must be in accordance with the appropriate local, national, and international standards, codes, and practices. Please review the approvals section of the 8742C reference manual for any restrictions associated with a safe installation.

  • Page 25: Flowtube Handling

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 FLOWTUBE HANDLING Handle all parts carefully to prevent damage. Whenever possible, transport the system to the installation site in the original shipping containers. ® Teflon -lined flowtubes are shipped with end covers that protect it from both mechanical damage and normal unrestrained distortion.

  • Page 26: Flowtube Mounting

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 FLOWTUBE MOUNTING Physical mounting of a flowtube is similar to installing a typical section of pipe. Conventional tools, equipment, and accessories (bolts, gaskets, and grounding hardware) are required. Upstream/Downstream To ensure specification accuracy over widely varying process conditions,...
  • Page 27 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Figure 3-4. Incline or Decline Orientation FLOW FLOW Horizontal installation should be restricted to low piping sections that are normally full. Orient the electrode plane to within 45 degrees of horizontal in horizontal installations.

  • Page 28: Flow Direction

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Figure 3-6. Rosemount 8711 Mounting Position 45° Electrode Plane 45° Electrode Plane Flow Direction The flowtube should be mounted so that the FORWARD end of the flow arrow, shown on the flowtube identification tag, points in the direction of flow through the tube (see Figure 3-7).

  • Page 29: Installation (Flanged Flowtube)

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 INSTALLATION The following section should be used as a guide in the installation of the flange-type Rosemount 8705 and Rosemount 8707 High-Signal Flowtubes. (FLANGED FLOWTUBE) Refer to page 3-10 for installation of the wafer-type Rosemount 8711 Flowtube.
  • Page 30 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 NOTE Do not bolt one side at a time. Tighten each side simultaneously. Example: 1. Snug left 2. Snug right 3. Tighten left 4. Tighten right Do not snug and tighten left and then snug and tighten right. Failure to do so will result in liner damage.
  • Page 31 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table 3-2. Flange Bolt Torque and Bolt Load Specifications for Rosemount 8705 Teflon/Tefzel liner PN10 PN 16 PN 25 PN 40 Size Code Line Size (Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton)

  • Page 32: Installation (Wafer Flowtube)

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table 3-3. Flange Bolt Torque and Bolt Load Specifications for Rosemount 8705 Polyurethane Liner PN 10 PN 16 PN 25 PN 40 Size Code Line Size (Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton) (Newton-meter) (Newton)

  • Page 33: Flange Bolts

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table 3-4. Stud Specifications Nominal Flowtube Size Stud Specifications 0.15 – 1 inch (4 – 25 mm) 316 SST ASTM A193, Grade B8M Class 1 threaded mounted studs – 8 inch (40 – 200 mm) CS, ASTM A193, Grade B7, threaded mounting studs Place the flowtube between the flanges.

  • Page 34: Installation (Sanitary Flowtube)

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table 3-5. Flange bolt Torque Specifications of Rosemount 8711 Flowtubes Size Code Line Size Pound-feet Newton-meter 0.15 inch (4 mm) 0.30 inch (8 mm) -inch (15 mm) 1 inch (25 mm) 13.6...
  • Page 35 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 NOTE Consult factory for installations requiring cathodic protection or situations where there are high currents or high potential in the process. The flowtube case should always be earth grounded in accordance with national and local electrical codes.
  • Page 36 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Figure 3-14. Grounding with Grounding Rings or Lining Protectors Earth Ground Grounding Rings or Lining Protectors Figure 3-15. Grounding with Grounding Rings or Lining Protectors Earth Ground Grounding Rings 3-14...

  • Page 37: Process Leak Protection (Optional)

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Figure 3-16. Grounding with Grounding Electrodes Earth Ground PROCESS LEAK The Rosemount 8705 Flowtube housing is fabricated from carbon steel to perform two separate functions. First, it provides shielding for the flowtube...

  • Page 38: Standard Housing Configuration

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Standard Housing The standard housing configuration is identified by a code W0 in the model number. This configuration does not provide separate electrode Configuration compartments with external electrode access. In the event of a process leak, these models will not protect the coils or other sensitive areas around the flowtube from exposure to the pressure fluid (Figure 3-17).

  • Page 39: Process Leak Containment

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Process Leak The second optional configuration, identified as option code W3 in the model number, divides the coil housing into three compartments: one for each Containment electrode and one for the coils. Should a damaged liner or electrode fault allow process fluid to migrate behind the electrode seals, the fluid is contained in the electrode compartment.

  • Page 40: Calibration

    Rosemount flowtubes are wet calibrated at the factory. They do not need further calibration during installation. Figure 4-1 illustrates how the flow signal is channeled through the transmitter. Figure 4-1. Functional Block Diagram for the Rosemount 8742C Flowmeter with F fieldbus OUNDATION Function Blocks •...

  • Page 41: Quick Start-Up

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Each F fieldbus configuration tool or host device has a different OUNDATION way of displaying and performing configurations. Some will use Device Descriptions (DD) and DD Methods to make configuring and displaying data consistent across host platforms.

  • Page 42: Ai Block

    Reference Manual 00809-X0100-4793, Rev CA Rosemount 8742C August 2004 AI BLOCK The Analog Input (AI) function block provides the primary interface of the measurement to the control and/or monitoring systems. To properly configure the device, three parameters must be set in order to correctly interface between the AI block and transducer block.

  • Page 43: Pid Block

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 PID BLOCK The PID function block combines all of the necessary logic to perform proportional/integral/derivative (PID) control. The block supports mode control, signal scaling and limiting, feedforward control, override tracking, alarm limit detection, and signal status propagation.

  • Page 44: Configuring Links And Scheduling Block Execution

    Reference Manual 00809-X0100-4793, Rev CA Rosemount 8742C August 2004 CONFIGURING LINKS Without configuring the links between blocks and scheduling the blocks to execute in the proper order, the application will not work correctly. Most hosts AND SCHEDULING and/or configuration tools make this task a simple matter by using a Graphical BLOCK EXECUTION User Interface (GUI).

  • Page 45: Advanced Applications

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Advanced Applications Figure 4-3. Control Configuration Transducer AI Block Analog Output PID Block Block Block (AO) Flow CAS_IN BKCAL_OUT Macro Cycle...

  • Page 46: Cascade Control

    Reference Manual 00809-X0100-4793, Rev CA Rosemount 8742C August 2004 Cascade Control Cascade control applications require two inputs. The configuration is to link the output of one AI block into the PID block in the 8742C transmitter and to link the AI block of a second 8742C transmitter into the PID block of that transmitter.

  • Page 47: Resource Block

    FEATURES_SEL FEATURES The FEATURES parameter is read only and defines which features are supported by the Rosemount 8742C. Below is a list of the FEATURES the Rosemount 8742C supports. UNICODE All configurable string variables in the Rosemount 8742C, except tag names, are octet strings.

  • Page 48: Plantweb ™ Alarms

    (on), the SW_SEL bit is automatically set to 0 (off) and is read only. FEATURES_SEL FEATURES_SEL is used to turn on any of the supported features. The default setting of the Rosemount 8742C does not select any of these features. Choose one of the supported features if any. MAX_NOTIFY...
  • Page 49 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 FAILED_MASK This parameter will mask any of the failed conditions listed in FAILED_ENABLED. A bit on means that the condition is masked out from alarming and will not be reported. FAILED_PRI Designates the alarming priority of the FAILED_ALM.
  • Page 50 Reference Manual 00809-X0100-4793, Rev CA Rosemount 8742C August 2004 MAINT_ALM An alarm indicating the device needs maintenance soon. If the condition is ignored, the device will eventually fail. Advisory Alarms An advisory alarm indicates informative conditions that do not have a direct impact on the device's primary functions There are five parameters associated with ADVISE_ALARMS, they are described below.
  • Page 51 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Recommended Actions for PlantWeb Alarms RECOMMENDED_ACTION The RECOMMENDED_ACTION parameter displays a text string that will give a recommended course of action to take based on which type and which specific event of the PlantWeb alarms is active.
  • Page 52 Reference Manual 00809-X0100-4793, Rev CA Rosemount 8742C August 2004 Simulation Simulation replaces the channel value coming from the transducer block for testing purposes. The following procedure is used to simulate a DI output. To change the output value place the Target Mode of the block to Manual and then change the OUT_D.VALUE to the desired value.

  • Page 53: Safety Information

    Verify that the operating environment of the flowtube and transmitter is consistent with the appropriate FM or CSA approval. Do not connect a Rosemount 8742C to a non-Rosemount flowtube that is located in an explosive atmosphere. SOFTWARE OPERATION Instructions and procedures listed here are specific to the Rosemount 8742C ™...

  • Page 54: Local Display Configuration

    French, and German. The display language can be changed by changing the Configuration transducer block parameter, DISPLAY_MODE. Table 5-1 lists the phrase, along with the text shown on the display. ™ Table 5-1. Local Display screens for Rosemount 8742C Magnetic Flowmeter Transmitter with F OUNDATION fieldbus Definition English...
  • Page 55 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Tube Calibration Number - 1000015010000000 Units - ft/s Coil Pulse Mode - 5 Hz The instructions for changing these parameters are located in the parameter descriptions in this section. Set the loop to manual, if necessary, before you begin. Complete the following steps: Power down the transmitter.

  • Page 56: Auto Zero Trim

    Learning Empty Pipe Empty pipe functionality is very useful for batch applications or a process where the piping often runs empty. The Rosemount 8742C transmitter learns empty pipe functionality by measuring the resistance across the electrodes. The flowtube must be completely full of process fluid when configuring empty pipe.
  • Page 57 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Right-click on the Transducer400 icon to initiate the empty pipe learning function. This will bring up the Transducer block menu items. From this menu, select Calibrate-Learn Empty Pipe, as shown in the diagram below.

  • Page 58: Diagnostics

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Diagnostics The magmeter specific diagnostics appear on the detailed status screen. Click on the Transducer Block, select status, and move over to the detailed status tabs (See Figure 5-1). The advanced diagnostics (High Process Noise,...
  • Page 59 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table 5-2. Triggered Diagnostics Symptom Probable Cause Corrective Action Primary Range Value The process variable (flow rate) is greater than 12 m/s • Lower the process rate. Exceed (40 ft/s). • Increase the flowtube line sizes.
  • Page 60 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table 5-2. Triggered Diagnostics Symptom Probable Cause Corrective Action Electrode Signal The flow signal has been compromised. The process • Remove any moisture or contamination in the flowtube Fault Detected variable is likely reading less than expected.

  • Page 61: Diagnostic Counter

    Replacing the The Rosemount 8742C Magnetic Flowmeter Transmitter electronics housing ™ can be replaced easily when necessary. The procedure is the same for OUNDATION Fieldbus integral or remote mount units.

  • Page 62: Replacing The Foundation

    OUNDATION Fieldbus damaged or nonfunctional. Use the following procedures to replace Electronics Boards electronics boards in the Rosemount 8742C. You will need a small, flat-head screwdriver. NOTE The electronics boards are electrostatically sensitive. Be sure to observe handling precautions for static-sensitive components.
  • Page 63 Loosen the three captive screws that anchor the electronics. Slowly pull the electronics boards out of the housing. Install the Electronics Boards Verify that all electric power to the Rosemount 8742C Magnetic Flowmeter Transmitter is disconnected. Align the three electronics boards over the captive screw holes in the housing.
  • Page 64 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 5-12...
  • Page 65 Verify that the operating environment of the flowtube and transmitter is consistent with the appropriate FM or CSA approval. Do not connect a Rosemount 8742C to a non-Rosemount flowtube that is located in an explosive atmosphere. Mishandling products exposed to a hazardous substance may result in death or serious injury.
  • Page 66 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table 6-1. Quick Troubleshooting Guide Symptom Potential Cause Corrective Action Reading does not appear to be Transmitter, control system, or other Check all configuration variables for the transmitter, flowtube, within rated accuracy receiving device not configured communicator, and/or control system.

  • Page 67: Step 1: Function Block Errors

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 STEP 1: FUNCTION Specific transmitter software troubleshooting for resource block errors and transducer block diagnostics are presented in the appendices. BLOCK ERRORS STEP 2: DIAGNOSTIC Messages on the local display or diagnostics with a red light in the detailed...
  • Page 68 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Test equipment (such as Fluke Model 25, 27, 83, 85, 87, or 8060A multimeter and a B&K Model 878 LCR meter or equivalent) is needed to conduct these tests. Same of the tests will require measuring conductance (nS, nanosiemens), the reciprocal of resistance.

  • Page 69: Step 6: Uninstalled Flowtube Tests

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Figure 6-1. Flowtube Circuit Diagram 68.1k (not applicable for flowtubes with N0 hazardous certification approval option code) 68.1k Flowtube Housing STEP 6: UNINSTALLED An uninstalled flowtube can also be used for flowtube troubleshooting. To...
  • Page 70 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Figure 6-2. 45° Electrode Plane To insure accuracy of resistance readings, zero out multimeter by shorting and touching the leads together. If any of these tests fail, refer to “Return of Materials”...

  • Page 71: Rosemount 8742C Transmitter Specifications

    Appendix A Reference Data Rosemount 8742C Transmitter Specifications ..page A-1 Rosemount 8705 and 8707 Flowtubes Specifications . . page A-5 Rosemount 8711 Wafer Flowtube Specifications ..page A-11 Rosemount 8714D Specifications .
  • Page 72 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Supply Current Requirements Units powered by 15-50 V dc power supply may draw up to 1 amp of current. 0.75 0.25 Power Supply (Volts) I = 10/V I = Supply current requirement (Amps)

  • Page 73: Foundation Fieldbus Specifications

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 OUNDATION Fieldbus Schedule Entries Specifications Seven (7) Links Twenty (20) Virtual Communications Relationships (VCRs) One (2) predefined (F6, F7) Nineteen (18) configurable (see Table A-1) Table A-1. Block Information Block Base Index...

  • Page 74: Performance Specifications

    1.0 ft/s (0.3 m/s), the system has an accuracy of ±0.005 ft/s (0.0015 m/s). Rosemount 8742C Transmitter with 8711 Flowtube System accuracy is ±0.5% of rate from 3 to 40 ft/s (0.9 to 12 m/s); includes combined effects of linearity, hysteresis, repeatability, and calibration uncertainty;...

  • Page 75: Physical Specifications

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Physical Specifications Materials of Construction (Transmitter) Housing Low-copper aluminum Paint Polyurethane Cover Gasket Rubber Electrical Connections Two ¾–14 NPT with number 8 screw terminal connections are provided for electrical wiring. PG13.5 and CM20 adapters are available. Screw terminals provided for all connections.
  • Page 76 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Process Temperature Limits Teflon (PTFE) Lining –20 to 350 °F (–29 to 177 °C) Tefzel (ETFE) Lining –20 to 300 °F (–29 to 149 °C) PFA Lining -20 to 350 °F (-29 to 177°C) Polyurethane Lining 0 to 140 °F (–18 to 60 °C)
  • Page 77 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table A-2. Temperature vs. Pressure Limits Flowtube Temperature vs. Pressure Limits for ASME B16.5 Class Flanges ( - to 36-inch line sizes) Pressure @ -20 to 100 °F @ 200 °F @ 300 °F...

  • Page 78: Performance Specifications

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Performance (System specifications are given using the frequency output and with the unit at referenced conditions.) Specifications Accuracy Rosemount 8705 with 8712D, 8732C, or 8742C ±0.5% of rate from 1 to 30 ft/s (0.3 to 10 m/s). Includes combined effects of linearity, hysteresis, repeatability, and calibration uncertainty.
  • Page 79 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 AWWA C207 Table 3 Class D 30- and 36-inch DIN PN 10, 16, 25, and 40 PN10: Not available for flange sizes from 15 to 150 mm PN16: Not available for flange sizes from 15 to 80 mm...
  • Page 80 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table A-5. Flowtube Weight (ASME) Flowtube Flange Rating Flowtube Weight Nominal Line Size Inches (mm) ASME B16.5 (ANSI) lb (kg) ½ (15) PN 40 20 (9) ½ (15) 22 (10) 1 (25)

  • Page 81: Rosemount 8711 Wafer Flowtube Specifications

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 ROSEMOUNT 8711 WAFER FLOWTUBE SPECIFICATIONS Functional Service Specifications Conductive liquids and slurries Line Sizes 0.15- through 8-inch (4 through 200 mm) Interchangeability Rosemount 8711 Flowtubes are interchangeable with 8732 and 8742C Transmitters.

  • Page 82: Performance Specifications

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Performance (System specifications are given using the frequency output and with the unit at referenced conditions.) Specifications Accuracy Rosemount 8711 with 8712D, 8732C, or 8742C Transmitters ±0.5% of rate from 3 to 30 ft/s (1 to 10 m/s) ±0.015 ft/s (0.0045 m/s) from low-flow cutoff to 3 ft/s (1 m/s)
  • Page 83 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Studs, Nuts, and Washers ASME B16.5 (ANSI) 0.15- through 1-inch (4 through 25 mm): 316 SST, ASTM A193, Grade B8M, Class 1 threaded mounting studs; ASTM A194, Grade 8M heavy hex nuts; SAE per ANSI B18.2.1, Type A, Series N flat washers.

  • Page 84: Rosemount 8714D Specifications

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 ROSEMOUNT 8714D SPECIFICATIONS Functional Ambient Temperature Limits Specifications Operating –30 to 140 °F (–34 to 60 °C) Storage –40 to 140 °F (–40 to 60 °C) Humidity Limits 0 to 95% relative humidity...

  • Page 85: Dimensional Drawings

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 DIMENSIONAL DRAWINGS FIGURE 1. Rosemount 8742C Transmitter 7.49 (190) 6.48 (165) 1.94 LOI Cover (49) ”-14 NPT Electrical Conduit Connections 5.10 3.00 (2 places) (130) (76) 8.81 (224) 10.5 (267) 3.07 (78) 3.43...
  • Page 86 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 FIGURE 2. Rosemount 8705 and 8707 Flowtubes, Typical of 0.5- through 4-inch (15 through 100 mm) Line Sizes 4.02 5.00 (102) (127) 2.00 (50.8) (66) (46) (66) -14 NPT Conduit Connection...
  • Page 87 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 FIGURE 4. Rosemount 8705 Sanitary Flowtubes, Typical of - through 3-inch (15 through 86 mm) Line Sizes 4.02 (102) 2.00 5.00 (50.8) (127) (46) (66) (66) Grounding -14 NPT Clamp Conduit...
  • Page 88 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table A-8. Rosemount 8705 and 8707 Dimensions in Inches (Millimeters) (Dimensions with ASME B16.5 (ANSI) Flanges) Refer to Dimensional Drawings, Figure 2, Figure 3, and Figure 4 Liner Face Overall Flowtube...
  • Page 89 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table A-9. Rosemount 8705 Flowtube Dimensions with DIN Flanges in Millimeters (Inches) Line Size Liner Face and Flange Body Height Diameter Overall Flowtube Flange Diameter Rating “H” “A” Length “L” “D”...
  • Page 90 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 FIGURE 5. Rosemount 8711 Dimensional Drawings (0.15-inch through 1-inch line sizes) 4.02 (102) 5.00 (127) (46) (66) Grounding Clamp ¾–14 NPT Conduit Connection B” (2 places) Flow NOTE Dimensions are in...
  • Page 91 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table A-10. Rosemount 8711 Flowtube Dimensions and Weight Nominal Flowtube Housing Dimensions Line Size Flowtube Length Weight Inches (mm) “A” Max. “B” “C” “D” Inside Diameter lb (kg) 0.15 4.00 (102) 5.44...

  • Page 92: Ordering Information

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 ORDERING INFORMATION Rosemount 8742C Model Product Description Availability OUNDATION 8742C Magnetic Flowmeter Transmitter with F fieldbus (flowtube ordered separately) • Code Transmitter Output OUNDATION fieldbus protocol, comes with standard Analog Input Integrator Function block and •...
  • Page 93 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Code Quick Installation Guide (QIG) Language Options (Default is English) Danish QIG • Dutch QIG • French QIG • German QIG • Finnish QIG Italian QIG • Norwegian QIG • Portuguese QIG •...

  • Page 94: Rosemount 8705

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Rosemount 8705 Code Product Description Availability 8705 Magnetic Flowmeter Flowtube • Code Lining Material • Teflon (PTFE) • Tefzel (ETFE) • Polyurethane • Neoprene • Linatex natural rubber • Other lining materials available upon request. Consult factory. For availability by Line Size; see chart below •...
  • Page 95 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Code Flange Material, Type, and Rating Availability Carbon Steel, ASME B16.5 (ANSI) Class 150 (30- and 36-inch AWWA C207 Table 3 Class D Flat Face) • Carbon Steel, MSS SP44 Class 150 (30-inch [750 mm] only) •...
  • Page 96 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Code Options Continued Availability Optional Grounding Rings 316L SST Grounding Rings • Hastelloy C-276 Grounding Rings (0.5- through 12-inch (15 through 300 mm) flowtube line sizes) • Titanium Grounding Rings (0.5- through 12-inch (15 through 300 mm) flowtube line sizes) •...
  • Page 97 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Code Options Continued Other Options Integral Mount with Rosemount 8732C/8742C Transmitter • High Accuracy Calibration [0.25% of rate from 3-30 ft/s (0.9-10 m/s)] • matched flowtube and transmitter system Heavy Duty Tagging •...

  • Page 98: Rosemount 8707

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Rosemount 8707 Code Product Description Availability 8707 High-Signal Magnetic Flowmeter Flowtube • Code Lining Material Teflon (PTFE) • Tefzel (ETFE) • Polyurethane • Neoprene • Linatex natural rubber • Other lining materials available upon request. Consult factory. For availability by Line Size, see chart below.
  • Page 99 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Availability Code Housing Configuration Sealed, welded housing • Sealed, welded housing with pressure relief • Sealed, welded housing with separate electrode compartments • Code Product Certifications Factory Mutual (FM) Class I, Division 2 Approval for nonflammable fluids;...

  • Page 100: Rosemount 8711

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Rosemount 8711 Model Product Description Availability 8711 Magnetic Flowmeter Flowtube (flangeless construction) • Code Lining Material Tefzel (ETFE) • Teflon (PTFE) (not available with 0.15 and 0.30 inch [4 and 8 mm] line sizes) •...

  • Page 101: Rosemount 8714

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Code Mounting Kit Availability Expanded Kit: includes two alignment rings (where applicable), threaded SST studs, and nuts ASME B16.5 (ANSI) Class 150 • DIN PN 10/16 (8 inch [200 mm] has a PN 10 mounting kit only) •...
  • Page 102 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 A-32...

  • Page 103: Approved Manufacturing Locations

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Appendix B Product Certifications European Directive Information ....page B-1 Hazardous Location Certifications ....page B-3 Approved Manufacturing Rosemount Inc.

  • Page 104: Electro Magnetic Compatibility (Emc) (89/336/Eec

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 All other Model 8705/8711/8721 Flowtubes — in line sizes of 1 inch and less: Sound Engineering Practice Flowtubes that are SEP are outside the scope of PED and cannot be marked for compliance with PED.

  • Page 105: Hazardous Location Certifications

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 HAZARDOUS LOCATION Equivalent Hazardous Location Certifications for flowtube and transmitter must match in integrally-mounted magnetic flowmeter systems. CERTIFICATIONS Remote-mounted systems do not require matched hazardous location certification option codes. Transmitter Approval Information Table B-1.
  • Page 106 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 K5 Explosionproof Approval with Intrinsically Safe Output Reference Rosemount Control Drawing 08742-1051 Explosion-Proof for Class I, Division 1, Groups C, D with IS output for Class I, Division 1, Groups A, B, C, D.
  • Page 107 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 European Certifications E1 ATEX Flameproof Hydrogen gas group 8732 - Certificate No.: 03ATEX2052X II 2G T6 (-20°C ≤ Ta ≤ +65°C) EEx d IIB + H 8742 - Certificate No.: 03ATEX2159X II 2G T6 (-20°C ≤...
  • Page 108 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 K1 ATEX Flameproof Hydrogen Gas Group with Intrinsically safe output (8742 only) Certificate No.: KEMA03ATEX2159x II 2G T6 (-20°C ≤ Ta ≤ +65°C) ATEX EEx de [ia] IIB + H = 250 V AC or 50 V DC...

  • Page 109: Flowtube Approval Information

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Remote Junction Box Certificate No.: KEMA03ATEX2052x II 2G ATEX EEx e T6 (Ta = -20°C to +65°C) When installed per drawing 08732-1050 After de-energizing, wait 10 minutes before opening cover 0575...
  • Page 110 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 E5 Explosion-Proof (8711 Only) Explosion-Proof for Class I, Division 1, Groups C, D Temp Code – T6 at 60°C Dust-Ignition proof Class II/III, Division 1, Groups E, F, G Temp Code – T6 at 60°C Class I, Division 2, Groups A, B, C, D Temp Code –...
  • Page 111 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 E1, ATEX Increased Safety (Zone 1) CD with IS Electrodes (8711 only) Certificate No: KEMA03ATEX2052X II 1/2G EEx e ia IIC T3... T6 (Ta = -20 to +60°) (See Table B-3)
  • Page 112 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 E1, ATEX Increased Safety (Zone 1) KD with IS Electrodes (8705 only) Certificate No. KEMA 03ATEX2052X II 1/2G EEx e ia IIC T3... T6 (Ta = -20 to 60°C) (See Table B-3)
  • Page 113 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table B-3. Relation between ambient temperature, process temperature, and temperature class Meter Size (Inches) Maximum Ambient Temperature Maximum Process Temperature Temperature Class 149°F (65°C) 297°F (147°C) 149°F (65°C) 318°F (159°C) 95°F (35°C) 232°F (111°C)
  • Page 114 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table B-5. Relation between the maximum ambient temperature, the maximum process temperature, and the temperature class Maximum process temperature °F (°C) per temperature class Maximum Ambient Temperature 0.5 inch flowtube size 149°F (65°C)
  • Page 115 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Table B-5. Relation between the maximum ambient temperature, the maximum process temperature, and the temperature class Maximum process temperature °F (°C) per temperature class Maximum Ambient Temperature 2.0 inch flowtube size 149°F (65°C)
  • Page 116 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 B-14...

  • Page 117: Definition

    Troubleshooting ....... . . page C-6 This section contains information on the resource block for the Rosemount 8742C Magnetic Flowmeter Transmitter. Descriptions of all resource block parameters, errors, and diagnostics are included. Also, the modes, alarm detection, status handling, virtual communication relationships (VCRs), and troubleshooting are discussed.
  • Page 118 (not used by the device). HARD_TYPES HARD_TYPES shows the types of hardware available as channel numbers. For the Rosemount 8742C, this parameter is limited to scalar (i.e., analog) inputs. RESTART Allows a manual restart to be initiated. Several degrees of restart are possible:...
  • Page 119 This parameter shows the current alert status, unacknowledged states, unreported states, and disabled states of the alarms associated with the function block. In the Rosemount 8742C Magnetic Flowmeter Transmitter, the two resource block alarms are write alarm and block alarm.
  • Page 120 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Index Number Parameter Rev 5 Description SAVE_CONFIG_BLOCKS Number of EEPROM blocks that have been modified since the last burn. This value will count down to zero when the configuration is saved.

  • Page 121: Modes

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 RESOURCE BLOCK Table C-2 lists conditions reported in the BLOCK_ERR parameter. Conditions in italics are inactive for the resource block and are given here only for ERRORS your reference. Table C-2. Resource BLOCK_ERR Conditions...

  • Page 122: Alarm Detection

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Alarm Detection A block alarm will be generated whenever the BLOCK_ERR has an error bit set. The types of block error for the resource block are defined in Table C-2. A write alarm is generated whenever the WRITE_LOCK parameter is cleared.

  • Page 123: Definition

    Troubleshooting ....... . . page D-6 This appendix contains information on the transducer block for the Rosemount 8742C Magnetic Flowmeter Transmitter (see Figure D-1). Descriptions of all transducer block parameters, errors, and diagnostics are listed.
  • Page 124 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 PARAMETERS AND Table D-1 lists all of the configurable parameters of the transducer block, indicating the descriptions and index numbers for each parameters. DESCRIPTIONS Table D-1. Transducer Block Parameters Parameter Index Number...

  • Page 125: Flow-Specific Block Configuration Values

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 FLOW-SPECIFIC BLOCK Once the transmitter is installed and communication is established, configuration must be completed. Three parameters must be entered for CONFIGURATION proper configuration: VALUES • Flowtube calibration number • Engineering units (configured via AI block) •...

  • Page 126: Transducer Block Errors

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 TRANSDUCER BLOCK The following conditions are reported in the BLOCK_ERR and XD_ERROR parameters. Conditions in italics are inactive for the transducer block and are ERRORS given here only for your reference.

  • Page 127: Transducer Block Diagnostics

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 TRANSDUCER BLOCK In addition to the BLOCK_ERR and XD_ERROR parameters, more detailed information on the measurement status can be obtained via DIAGNOSTICS DETAILED_STATUS. Table D-5 lists the potential errors and the possible corrective actions for the given values.

  • Page 128: Status Handling

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 Status Handling Normally, the status of the output channels reflects the status of the measurement value, the operating condition of the measurement electronics card, and any active alarm condition. In Auto mode, OUT reflects the value and status quality of the output channels.

  • Page 129: Safety Messages

    Reference Manual 00809-0100-493, Rev CA Rosemount 8742C August 2004 Appendix E Field-Removable Electrodes Safety Messages ....... . . page E-1 Remove the Electrode Assembly .

  • Page 130: Replace The Electrode Assembly

    Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C August 2004 REPLACE THE Use the following procedure to replace the electrode assembly into the flowtube. ELECTRODE ASSEMBLY Lubricate the o-ring. Install the o-ring on the electrode. Insert the electrode into the electrode housing. Push straight in until the electrode is seated.
  • Page 131 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C 8/31/04 Index ..2-8 Accuracy Block Configuration Dedicated Conduit ..A-8 Model 8705/8707 AI Block DETAILED_STATUS ..A-12 .
  • Page 132 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C 8/31/04 ... . . 4-8 ..3-16 Unicode Relief Valves . . E-1 ..3-1...
  • Page 133 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C 8/31/04 . . A-8 process conditions process temperature limits ..4-12 Recommended Actions ..4-12 ....4-2...
  • Page 134 Reference Manual 00809-0100-4793, Rev CA Rosemount 8742C 8/31/04 ....4-8 Unicode . 3-4 Upstream/Downstream Piping Accuracy ..3-4 Ensuring .
  • Page 136 August 2004 Rosemount and the Rosemount logotype are registered trademarks of Rosemount Inc. PlantWeb is a registered trademark of one of the Emerson Process Management group of companies. All other marks are the property of their respective owners. Emerson Process Management Rosemount Inc.

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