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Reference Manual
00809-0400-4728, Rev AA
June 2011
Rosemount 644 Temperature Transmitter
™
with FOUNDATION fieldbus
www.rosemount.com
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 Table of Contents SECTION 1 Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Introduction Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 APPENDIX A Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1 Functional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1 Specifications and Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2 Reference Data Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 Rosemount 644 Temperature Transmitters Rosemount 644 Hardware Revision 9 ™ FOUNDATION Fieldbus Device Revision 2 Device Descriptor Revision 1 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 o
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 Section 1 Introduction Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2 Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-3 Return of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-4 SAFETY MESSAGES Instructions and proced
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 OVERVIEW Manual This manual is designed to assist in the installation, operation, and maintenance of Rosemount 644 head mount and 644 rail mount. Section 1: Introduction • Transmitter and Manual Overview • Considerations • Return of Material Section 2: Installation • Mounting • Installation • Wiring • Power Supply • Commissioning Section 3: Configuration • Calibration • Hardware Maintenance • Diagnostic Messaging Appendix A: Speci
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 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) • Temperature Sensors and Assemblies Product Data Sheet, Volume 2 (document number 00813-0200-2654) CONSIDERATIONS General Electrical temperature sensors such as RTDs and thermoco
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 Figure 1-1. 644 head mount 60 (108) Transmitter Connection Head Temperature Rise vs. Extension 50 (90) Length 40 (72) 815 °C (1500 °F) Oven Temperature 30 (54) 22 20 (36) 540 °C (1000 °F) Oven Temperature 10 (18) 250 °C (482 °F) Oven Temperature 0 3 4 5 6 7 8 9 3.6 Extension Length (in.) Example The transmitter specification limit is 85 °C. If the ambient temperature is 55 °C and the process temperature to be measured is 800 °
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 Section 2 Installation Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-7 Power Supply . . . . . .
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 Figure 2-1. Installation Flowchart Bench START Calibration? HERE FIELD INSTALL Does not apply to the 644 Set Failure Mode BASIC SETUP with FOUNDATION fieldbus Switch Set Sensor Type Mount Transmitter Set Number of Wires Wire Transmitter Set Units Power Transmitter Set Range Values FINISHED Set Damping VERIFY Simulate Sensor Input Within Specifications? Refer to Section 3: Configuration 2-2
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 MOUNTING Mount the transmitter at a high point in the conduit run to prevent moisture from draining into the transmitter housing. The 644 head mount installs: • In a connection head or universal head mounted directly on a sensor assembly • Apart from a sensor assembly using a universal head • To a DIN rail using an optional mounting clip. The 644 rail mount attaches directly to a wall or to a DIN rail. Mounting a 644H to a DIN
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 INSTALLATION Typical European Head Mount Transmitter with DIN Plate Style Sensor Installation 1. Attach the thermowell to the pipe or process container wall. Install and tighten the thermowell before applying process pressure. 2. Assemble the transmitter to the sensor. Push the transmitter mounting screws through the sensor mounting plate and insert the snap rings (optional) into the transmitter mounting screw groove. 3. Wire
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 Typical North American Head Mount Transmitter with Threaded Sensor Installation 1. Attach the thermowell to the pipe or process container wall. Install and tighten thermowells before applying process pressure. 2. Attach necessary extension nipples and adapters to the thermowell. Seal the nipple and adapter threads with silicone tape. 3. Screw the sensor into the thermowell. Install drain seals if required for severe environment
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 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. After-market installation of the meter can be performed if the transmitter has a meter connector (transmitter revision 5.5.2 or later). After-market installation requires the meter kit (pa
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 WIRING All power to the transmitter is supplied over the signal wiring. Use ordinary copper wire of sufficient size to ensure that the voltage across the transmitter power terminals does not drop below 9 Vdc. If the sensor is installed in a high-voltage environment and a fault condition or installation error occurs, the sensor leads and transmitter terminals could carry lethal voltages. Use extreme caution when making contact
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 Figure 2-6. Connecting a FOUNDATION fieldbus Host 6234 ft (1900 m) max (depending upon cable characteristics) System to a Transmitter Loop Terminators Integrated Power Conditioner and Filter Power (Trunk) Supply (The power supply, FOUNDATION filter, first fieldbus terminator, and Configuration configuration Tool tool are typically located in the control room.) Power/ Signal Devices 1 Wiring through 16 Sensor Connecti
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 RTD or Ohm Inputs The transmitters will accept a variety of RTD configurations, including 2-wire, 3-wire, or 4-wire. 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). In this case, the leads between the RTD and transmitter should be shielded. If using on
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Reference Manual 00809-0400-4728, Rev AA June 2011 Rosemount 644 Lead wire imbalance seen by the transmitter = 0.5 0.5 Basic error== ---------------------------------------------------------------------------------- 1.3 C 0.00385 / C 100 Error due to amb. temp. var. of 25 °C 0.0039 / C 25 C 0.5 = ------------------------------------------------------------------------------------------------------ -= 0.1266 C 0.00385 / C 100 • Pt100 2-wire
