Emerson Rosemount 644H Reference Manual
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Emerson Rosemount 644H Reference Manual

Smart temperature transmitters
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Reference Manual
00809-0100-4728, Rev HA
December 2002
Models 644H and 644R Smart
Temperature Transmitters
www.rosemount.com
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Summary of Contents for Emerson Rosemount 644H

  • Page 1 Reference Manual 00809-0100-4728, Rev HA December 2002 Models 644H and 644R Smart Temperature Transmitters www.rosemount.com...
  • Page 3 Using non-nuclear qualified products in applications that require nuclear-qualified hardware or products may cause inaccurate readings. For information on Rosemount nuclear-qualified products, contact a Emerson Process Management Sales Representative. Rosemount Model 644 Smart Temperature Transmitters may be protected by one or more U.S.

  • Page 5: Table Of Contents

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Table of Contents SECTION 1 Safety Messages ..........1-1 Introduction Warnings .
  • Page 6 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 SECTION 4 Safety Messages ..........4-1 Operation and Warnings .

  • Page 7: Safety Messages

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Section 1 Introduction Safety Messages ....... . . page 1-1 Overview .

  • Page 8: Overview

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 OVERVIEW Manual This manual is designed to assist in the installation, operation, and ® maintenance of Rosemount Models 644H and 644R. Section 1: Introduction • Transmitter and Manual Overview •...

  • Page 9: Considerations

    00809-0100-4728, Rev HA Models 644H and 644R December 2002 Refer to the following literature for a full range of compatible connection heads, sensors, and thermowells provided by Emerson Process Management. • Temperature Sensors and Assemblies Product Data Sheet, Volume 1 (document number 00813-0100-2654) •...

  • Page 10: Return Of Materials

    8 °C, thereby reducing any temperature effects in the transmitter. RETURN OF MATERIALS To expedite the return process in North America, call the Emerson Process Management National Response Center toll-free at 800-654-7768. This center, available 24 hours a day, will assist you with any needed information or materials.

  • Page 11: Safety Messages

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Section 2 Installation Safety Messages ....... . . page 2-1 Mounting .
  • Page 12 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Figure 2-1. Installation Flowchart Bench START Calibration? HERE FIELD INSTALL Set Failure Mode BASIC SETUP Switch Set Sensor Type Mount Transmitter Wire Transmitter Set Number of Wires Set Units Power Transmitter Set Range Values FINISHED...

  • Page 13: Mounting

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 MOUNTING Mount the transmitter at a high point in the conduit run to prevent moisture from draining into the transmitter housing. The Model 644H installs • In a connection head or universal head mounted directly on a sensor assembly •...

  • Page 14: Installation

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 INSTALLATION Typical European Head Mount Transmitter with DIN Plate Style Sensor Installation Attach the thermowell to the pipe or process container wall. Install and tighten the thermowell before applying process pressure. Verify the transmitter failure mode switch.

  • Page 15: Typical North American Installation

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Typical North American Head Mount Transmitter with Threaded Sensor Installation Attach the thermowell to the pipe or process container wall. Install and tighten thermowells before applying process pressure. Attach necessary extension nipples and adapters to the thermowell. Seal the nipple and adapter threads with silicone tape.
  • Page 16 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Rail Mount Transmitter and Sensor Attach the transmitter to a suitable rail or panel. Attach the thermowell to the pipe or process container wall. Install and tighten the thermowell, according to plant standards, before applying pressure.
  • Page 17 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Rail Mount Transmitter with Threaded Sensor Attach the transmitter to a suitable rail or panel. Attach the thermowell to the pipe or process container wall. Install and tighten the thermowell before applying pressure. Attach necessary extension nipples and adapters.

  • Page 18: Lcd Display Installation

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 LCD Display Installation The LCD display provides local indication of the transmitter output and abbreviated diagnostic messages governing transmitter operation. Transmitters ordered with the LCD display are shipped with the meter installed.

  • Page 19: Multichannel Installations

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Multichannel Several transmitters can be connected to a single master power supply, as shown in Figure 2-5. In this case, the system may be grounded only at the Installations negative power supply terminal.

  • Page 20: Sensor Connections

    2-wire 3-wire RTD RTD and and mV * Emerson Process Management provides 4-wire sensors for all single element RTDs. Use these RTDs in 3-wire configurations by leaving the unneeded leads disconnected and insulated with electrical tape. Thermocouple or Millivolt Inputs The thermocouple can be connected directly to the transmitter.
  • Page 21 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 RTD or Ohm Inputs The transmitters will accept a variety of RTD configurations, including 2-wire, 3-wire, 4-wire, and compensation loop designs. If the transmitter is mounted remotely from a 3-wire or 4-wire RTD, it will operate within specifications, without recalibration, for lead wire resistances of up to 60 ohms per lead (equivalent to 6,000 feet of 20 AWG wire).

  • Page 22: Power Supply

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Lead wire imbalance seen by the transmitter = 0.5 Ω 0.5 Ω 1.3 ° C Basic error -------------------------------------------------------------------------------- - 0.00385 Ω / Ω ° C × 100 Ω ± Error due to amb.

  • Page 23: Surges/Transients

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Surges/Transients The transmitter will withstand electrical transients of the energy level encountered in static discharges or induced switching transients. However, high-energy transients, such as those induced in wiring from nearby lightning strikes, welding, heavy electrical equipment, or switching gears, can damage both the transmitter and the sensor.
  • Page 24 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Option 2: Connect sensor wiring shield to the transmitter housing (only if the housing is grounded). Ensure the sensor shield is electrically isolated from surrounding fixtures that may be grounded. Ground signal wiring shield at the power supply end.

  • Page 25: Commissioning

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 COMMISSIONING Failure Mode As part of normal operation, each transmitter continuously monitors its own performance. This automatic diagnostics routine is a timed series of checks repeated continuously. If diagnostics detect an input sensor failure or a failure in the transmitter electronics, the transmitter drives its output to low or high depending on the position of the failure mode switch.
  • Page 26 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 2-16...

  • Page 27: Safety Messages

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Section 3 Configuration Safety Messages ....... . . page 3-1 Model 275 HART Communicator .

  • Page 28: Model 275 Hart Communicator

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 MODEL 275 HART The HART Communicator exchanges information with the transmitter from the control room, the instrument site, or any wiring termination point in the COMMUNICATOR loop. To facilitate communication, connect the HART Communicator in parallel with the transmitter (see Figure 2-11).

  • Page 29: Hart Menu Tree

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 HART Menu Tree Options listed in bold type indicate that a selection provides other options. For ease of operation, changing calibration and setup, such as sensor type, number of wires, and range values, can be completed in several locations. Figure 3-1.

  • Page 30: Fast Key Sequence

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Fast Key Sequence Table 3-1 lists the fast key sequences for common transmitter functions. NOTE: The fast key sequences assume that DD Dev v6, DD v1 is being used. Some features apply only to the Model 644H, as noted in the following pages.

  • Page 31: Review Configuration Data

    DIN type L, U thermocouples • ASTM Type W5Re/W26Re thermocouple • –10 to 100 millivolts • 2-, 3-, or 4-wire 0 to 2000 ohms A complete line of temperature sensors, thermowells, and accessory mounting hardware is available from Emerson Process Management.
  • Page 32 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Set Output Units Fast Key Sequence 1, 3, 2, 1, 2, 2 The Set Output Unit command sets the desired primary variable units. Set the transmitter output to one of the following engineering units: •...
  • Page 33 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Process Variable (PV) Damping Fast Key Sequence 1, 3, 3, 1, 3 The PV Damp command changes the response time of the transmitter to smooth variations in output readings caused by rapid changes in input. Determine the appropriate damping setting based on the necessary response time, signal stability, and other requirements of the loop dynamics of the system.

  • Page 34: Information Variables

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 2-Wire RTD Offset Fast Key Sequence 1, 3, 2, 1, 2, 1 The 2-Wire RTD Offset command allows the user to input the measured lead wire resistance, which will result in the transmitter adjusting its temperature measurement to correct the error caused by this resistance.

  • Page 35: Diagnostics And Service

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Message Fast Key Sequence 1, 3, 4, 4 The Message variable provides the most specific user-defined means for identifying individual transmitters in multi-transmitter environments. It allows for 32 characters of information and is stored with the other configuration data.
  • Page 36 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 After completing the test procedure, the display returns to the loop test screen and another output value can be chosen. Master Reset Fast Key Sequence 1, 2, 1, 3 Master Reset resets the electronics without actually powering down the unit.
  • Page 37 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 HART Output Fast Key Sequence 1, 3, 3, 3 The HART Output command allows the user to make changes to the multidrop address, specify the number of requested preambles, initiate burst mode, or make changes to the burst options.
  • Page 38 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Intermittent Threshold Fast Key Sequence 1, 3, 5, 4 The threshold value can be changed from the default value of 2%. Turning the Intermittent Sensor Detect feature OFF or leaving it ON and increasing the threshold value above the default does not affect the time needed for the transmitter to output the correct alarm signal after detecting a true open sensor condition.

  • Page 39: Multidrop Communication

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Transmitter Behavior with Intermittent Sensor Detect OFF When the Intermittent Sensor Detect feature is switched OFF, the transmitter tracks all process temperature changes, even if they are the consequence of an intermittent sensor.
  • Page 40 Models 644H and 644R December 2002 Figure 3-4 shows a typical multidrop network. Do not use this figure as an installation diagram. Contact Emerson Process Management product support with specific requirements for multidrop applications. NOTE Model 644 transmitters are set to address 0 at the factory, allowing them to operate in the standard point-to-point manner with a 4–20 mA output signal.

  • Page 41: Operation And Maintenance

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Section 4 Operation and Maintenance Safety Messages ....... . . page 4-1 Calibration .

  • Page 42: Calibration

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 CALIBRATION Calibrating the transmitter increases the measurement precision by allowing corrections to be made to the factory-stored characterization curve by digitally altering the transmitter’s interpretation of the sensor input. To understand calibration, it is necessary to understand that smart transmitters operate differently from analog transmitters.
  • Page 43 (see the comparison below) and if you have a sensor with Callendar-Van Dusen constants. When ordered from Emerson Process Management, sensors with Callendar-Van Dusen constants are NIST-traceable. The Model 644 accepts Callendar-Van Dusen constants from a calibrated RTD schedule and generates the actual curve to match that specific sensor curve.
  • Page 44 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Callendar-Van Dusen equation: α [t – δ(0.01t-1)(0.01t) – β(0.01t – 1)(0.01t) The following input variables, included with specially-ordered Rosemount temperature sensors, are required: = Resistance at Ice Point Alpha = Sensor Specific Constant Beta = Sensor Specific Constant Delta = Sensor Specific Constant To input Callendar-Van Dusen constants, perform the following procedure:...
  • Page 45 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Output Trim or Scaled Output Trim Perform an output trim or a scaled output trim if the digital value for the primary variable matches the plant’s standards but the transmitter’s analog output does not match the reading on the output device.

  • Page 46: Hardware

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Scaled Output Trim Fast Key Sequence 1, 2, 2, 3 The Scaled D/A Trim command matches the 4 and 20 mA points to a user-selectable reference scale other than 4 and 20 mA (2–10 volts, for example).

  • Page 47: Model 275 Hart Communicator

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Symptom Potential Source Corrective Action Electronics Module • Connect a Model 275 HART Communicator and enter the transmitter status mode to isolate module failure. • Connect a Model 275 HART Communicator and check the sensor limits to ensure calibration adjustments are within the sensor range.
  • Page 48 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Message Description Exceed precision Indicates that the precision for the current arithmetic variable exceeds the device- specified description edit format. Ignore next 50 occurrences of status? Asked after displaying device status. Softkey answer determines whether next 50 occurrences of device status will be ignored or displayed.

  • Page 49: Lcd Display

    This message indicates one of several conditions. For example, the transmitter may have experienced an electronics failure while attempting to store information. If diagnostics indicate an electronics failure, replace the transmitter with a new one. Contact the nearest Emerson Process Management Field Service Center if necessary. SNSR FAIL The top line of the display scrolls through the following three messages: •...
  • Page 50 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 4-10...

  • Page 51: Specifications

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Appendix A Specifications and Reference Data Specifications ........page A-1 Dimensional Drawings .
  • Page 52 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 NAMUR Recommendations The Model 644 meets the following NAMUR recommendations: • NE 21 – Electromagnetic compatibility (EMC) for Process and Laboratory Apparatus (644H only– hardware revision 26 and later) •...

  • Page 53: Physical

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Physical Electrical Connections Model Power and Sensor Terminals 644H Compression screws permanently fixed to terminal block 644R Compression screw permanently fixed to front panel ® WAGO spring clamp terminals are optional (option code G5) HART Communicator Connections Communication Terminals Model 644H...
  • Page 54 3-wire RTD RTD and and mV * Emerson Process Management provides 4-wire sensors for all single element RTDs. You can use these RTDs in 3-wire configurations by leaving the unneeded leads disconnected and insulated with electrical tape. Rosemount Conformance to Specifications A Rosemount product not only meets its published specifications, but most likely exceeds them.
  • Page 55 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Accuracy Table A-2. Model 644 Input Options and Accuracy. Sensor Sensor Input Recommended Digital Options Reference Ranges Min. Span Accuracy Accuracy 2-, 3-, 4-wire RTDs °C °F °C °F °C °F Pt 100...
  • Page 56 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Ambient Temperature Effect Table A-3. Ambient Temperature Effect Temperature Effects per 1.0 °C (1.8 °F) Change Sensor Options in Ambient Temperature Range D/A Effect 2-, 3-, 4-wire RTDs Pt 100 ((α = 0.00385) 0.003 °C (0.0054 °F) Entire Sensor Input Range 0.001% of span...

  • Page 57: Dimensional Drawings

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 DIMENSIONAL DRAWINGS Model 644R (Rail Mount) Model 644H (DIN A Head Mount) Shown with Standard Compression Screw Terminals 60 (2.4) 33 (1.3) Standard Sensor Sensor Terminals Terminals Meter Connector 24 (1.0) Communication Terminals Failure Mode...
  • Page 58 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Mounting Universal Clip for Mounting to a Wall or a Rail G-Rail (asymmetric) Top Hat Rail (symmetric) (part number 03044-4103-0001) Mounting Mounting Hardware Hardware G-Rail Grooves Screw Holes Transmitter Transmitter for Mounting Top Hat Rail...

  • Page 59: Ordering Information

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 ORDERING INFORMATION • = Available — = Not available Head Mount Rail Mount Model Product Description 644H Smart Head Mount Temperature Transmitter • — 644R Smart Rail Mount Temperature Transmitter —...
  • Page 60 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 (6) No approvals available with polished SST housing (NA option code only). TABLE 1. Transmitter Accessories Part Description Part Number Aluminum alloy Universal Head, standard cover—M20 entries 00644-4420-0002 Aluminum alloy Universal Head, meter cover—M20 entries 00644-4420-0102 Aluminum alloy Universal Head, standard cover—...
  • Page 61 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Hardware Tag • No charge • Tagged in accordance with customer requirements • Tags are adhesive labels • Permanently attached to transmitter and enclosure if enclosure is ordered • Character height is -in (1.6 mm) Software Tag •...

  • Page 62: Stainless Steel Housing

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 The following table lists the necessary requirements to specify a custom configuration. Requirements/ Option Code Specification C1: Factory Configuration Data Date: day/month/year (CDS required) Descriptor: 16 alphanumeric characters Message: 32 alphanumeric character Analog Output: Alarm and saturation levels C2:Transmitter –...

  • Page 63: Dimensional Drawings

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Dimensional Drawings Sanitary Housing Covers Standard Cover Housing Standard Meter Cover O-Ring 76.2 (3.0) 33 (1.3) 79.8 (3.14) 27.9 (1.1) 25.4 (1.0) 24.4 44.5 (1.75) (0.96) 70.0 (2.76) LCD Display Cover LCD Display Cover Housing O-Ring...
  • Page 64 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 A-14...

  • Page 65: Hazardous Locations Certificates

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Appendix B Product Certifications Hazardous Locations Certificates ....page B-1 Installation Drawings ......page B-4 HAZARDOUS The Model 644 is available with circuitry that is suitable for intrinsically safe operation.

  • Page 66: European Approvals

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 NOTE Approval E5 is only available with 644H option codes J5 and J6. Canadian Standards Association (CSA) Approvals CSA Intrinsic Safety Intrinsically Safe for Class I, Division 1, Groups A, B, C, and D when installed in accordance with Rosemount drawing 00644–1064.

  • Page 67: Australian Approvals

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Table B-4. Entity Parameters Loop/Power Sensor = 30 V = 13.6 V = 200 mA = 80 mA = 0.67 W or 1.0 W = 80 mW = 10 nF = 75 nF Special Conditions for Safe Use (X): The transmitter must be installed so that its external terminals and...

  • Page 68: Brazilian Approval

    Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 NOTE Flame-Proof certification is only available as a complete assembly with Rosemount universal head – option codes J5 or J6. SAA Intrinsic Safety Certification Number: Not available, consult factory Ex ia IIC Temperature Code: Not available, consult factory N7 SAA Type n...
  • Page 69 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 IMPORTANT Once a device labeled with multiple approval types is installed, it should not be reinstalled using any of the other labeled approval types. To ensure this, the approval label should be permanently marked to distinguish the used from the unused approval type(s).
  • Page 70 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Figure B-1. Canadian Standards Association (CSA) Intrinsic Safety Installation Drawing 00644-1064, Rev. AB...
  • Page 71 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Figure B-2. Canadian Standards Association (CSA) Explosion-Proof Installation Drawing 00644-1059, Rev. AC...
  • Page 72 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Figure B-3. Factory Mutual (FM) Intrinsic Safety Installation Drawing 00644-0009, Rev. AD. Sheet 1 of 2...
  • Page 73 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Figure B-4. Factory Mutual (FM) Intrinsic Safety Installation Drawing 00644-0009, Rev. AD. Sheet 2 of 2...
  • Page 74 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Figure B-5. Factory Mutual (FM) Explosion-Proof Installation Drawing 00644-1049, Rev. AC B-10...
  • Page 75 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 Index ..3-2 HART Communicator ... . .3-5 Check Output ....4-2 .
  • Page 76 Reference Manual 00809-0100-4728, Rev HA Models 644H and 644R December 2002 ..A-12 Stainless Steel Housing . . A-12 ..3-8 ..A-3 Biotechnology Applications Information Variables Performance Specifications .
  • Page 78 December 2002 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. HART is a registered trademark of the HART Communication Foundation. Lexan and Noryl are registered trademark of General Electric.

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