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Rosemount 644 Temperature Transmitter ... The Rosemount 644 Head Mount and Field Mount Temperature Transmitters support the following features: • HART configuration with Selectable

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  • Reference Manual 00809-0200-4728, Rev SC

    May 2020

    Rosemount™ 644 Temperature Transmitter

    with HART® Protocol

  • Safety messages

    NOTICE

    Read this manual before working with the product. For personal and system safety, and for optimum product performance, make sure to thoroughly understand the contents before installing, using, or maintaining this product. The United States has two toll- free assistance numbers and one international number. Customer Central: 1-800-999-9307 (7:00 a.m. to 7:00 p.m. Central Standard Time)

    National Response Center: 1-800-654-7768 (24 hours a day). Equipment service needs.

    International: 1-(952)-906-8888

    The products described in this document are NOT designed for nuclear-qualified applications.

    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 your local Emerson Sales Representative.

    WARNING

    Follow instruction

    Failure to follow these installation guidelines could result in death or serious injury.

    Ensure only qualified personnel perform the installation.

    Explosion

    Explosions could result in death or serious injury.

    Do not remove the connection head cover in explosive atmospheres when the circuit is live. Before connecting a handheld communicator in an explosive atmosphere, ensure that the instruments in the loop are installed in accordance with intrinsically safe or non-incendive field wiring practices. Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications. All connection head covers must be fully engaged to meet explosion-proof requirements.

    Process leaks

    Process leaks could result in death or serious injury.

    Do not remove the thermowell while in operation. Install and tighten thermowells and sensors before applying pressure.

    Electric shock

    Electrical shock could cause death or serious injury.

    Use extreme caution when making contact with the leads and terminals.

    Physical access

    Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end users’ equipment. This could be intentional or unintentional and needs to be protected against.

    Physical security is an important part of any security program and fundamental to protecting your system. Restrict physical access by unauthorized personnel to protect end users’ assets. This is true for all systems used within the facility.

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  • Contents

    Chapter 1 Introduction.............................................................................................................. 5 1.1 Using this manual........................................................................................................................ 5

    Chapter 2 Configuration............................................................................................................ 9 2.1 Overview..................................................................................................................................... 9

    2.2 Safety messages.......................................................................................................................... 9

    2.3 System readiness....................................................................................................................... 10

    2.4 Configuration methods..............................................................................................................11

    2.5 Verify configuration................................................................................................................... 16

    2.6 Basic configuration of the transmitter........................................................................................18

    2.7 Configure dual sensor options................................................................................................... 23

    2.8 Configure device outputs...........................................................................................................29

    2.9 Inputting device information..................................................................................................... 37

    2.10 Configure measurement filtering.............................................................................................39

    2.11 Diagnostics and service............................................................................................................41

    2.12 Establishing multi-drop communication.................................................................................. 46

    2.13 Using the transmitter with the HART Tri-Loop..........................................................................48

    2.14 Transmitter security ................................................................................................................51

    Chapter 3 Hardware Installation.............................................................................................. 53 3.1 Overview................................................................................................................................... 53

    3.2 Safety messages........................................................................................................................ 53

    3.3 Considerations...........................................................................................................................54

    3.4 Installation procedures.............................................................................................................. 57

    Chapter 4 Electrical Installation................................................................................................69 4.1 Overview................................................................................................................................... 69

    4.2 Safety messages........................................................................................................................ 69

    4.3 Wiring and powering the transmitter.........................................................................................70

    Chapter 5 Operation and maintenance.....................................................................................79 5.1 Overview................................................................................................................................... 79

    5.2 Safety messages........................................................................................................................ 79

    5.3 Calibration overview.................................................................................................................. 80

    5.4 Sensor input trim....................................................................................................................... 81

    5.5 Trim the analog output.............................................................................................................. 84

    5.6 Transmitter-sensor matching.................................................................................................... 86

    5.7 Switching HART Revision........................................................................................................... 88

    Chapter 6 Troubleshooting...................................................................................................... 91 6.1 Overview................................................................................................................................... 91

    Reference Manual Contents 00809-0200-4728 May 2020

    Emerson.com/Rosemount 3

  • 6.2 Safety messages........................................................................................................................ 91

    6.3 4–20 mA/HART output.............................................................................................................. 92

    6.4 Diagnostic messages................................................................................................................. 94

    6.5 Return of materials.................................................................................................................... 99

    Chapter 7 Safety Instrumented Systems (SIS) Certification..................................................... 101 7.1 SIS certification........................................................................................................................101

    7.2 Safety certified identification................................................................................................... 101

    7.3 Installation...............................................................................................................................101

    7.4 Configuration.......................................................................................................................... 102

    7.5 Operation and maintenance.................................................................................................... 103

    7.6 Specifications.......................................................................................................................... 105

    Appendix A Reference Data.......................................................................................................107 A.1 Product certifications............................................................................................