Rosemount 644 Head and Rail Mount Temperature Transmitters Manuals & Guides

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Reference Manual

00809-0100-4728, Rev KA July 2010

Rosemount 644 Head and Rail Mount Temperature Transmitters

www.rosemount.com

Reference Manual

NOTICE

00809-0100-4728, Rev KA July 2010

Rosemount 644

Rosemount 644 Temperature Transmitters

Rosemount 644 Hardware Revision

Device Revision

HART Field Communicator Field Device Revision

OUNDATION

OUNDATION fieldbus Device Revision

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. CST)

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 a Emerson Process Management Sales Representative.

™

fieldbus Hardware Revision

5.6 Dev v6, DD v1 5 1

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Reference Manual

00809-0100-4728, Rev KA July 2010

Table of Contents

Rosemount 644

SECTION 1 Introduction

SECTION 2 Installation

SECTION 3 HART Configuration

SECTION 4 Foundation fieldbus Configuration

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Return of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Field Communicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

AMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Multidrop Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Operation and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

General Block Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Foundation fieldbus function blocks . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Operation and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

APPENDIX A Specifications and Reference Data

APPENDIX B Product Certifications

APPENDIX C Foundation fieldbus Block Information

HART and Foundation Fieldbus Specifications . . . . . . . . . . . . . . . . . A-1

Foundation Fieldbus Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

4–20 mA / HART Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10

Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-12

Stainless Steel Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-18

Approved Manufacturing Locations . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

European Union Directive Information . . . . . . . . . . . . . . . . . . . . . . . . B-1

Hazardous Locations Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Installation Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-10

Basic Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Resource Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Sensor Transducer Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5

Analog Input (AI) Function Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8

LCD Transducer Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-12

PID Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-13

TOC-1

Reference Manual

00809-0100-4728, Rev KA July 2010

Rosemount 644

TOC-2

Reference Manual

00809-0100-4728, Rev KA July 2010

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 procedures in this section may require special precautions to

ensure the safety of the personnel performing the operations. Information that potentially raises safety issues is indicated by a warning symbol ( ). Please refer to the following safety messages before performing an operation preceded by this symbol.

Warnings

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

• Make sure only qualified personnel perform the installation.

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 HART or F make sure the instruments in the loop are installed in accordance with intrinsically safe or non-intrinsic 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 could result in death or serious injury.

• Do not remove the thermowell while in operation.

• Install and tighten thermowells and sensors before applying pressure

Electrical shock could cause death or serious injury.

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

OUNDATION fieldbus in an explosive atmosphere,

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Reference Manual

00809-0100-4728, Rev KA

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: HART Configuration

• Field Communicator

• Configuration

• Multidrop Communication

July 2010

Section 4: F

• Calibration

• Hardware Maintenance

• Diagnostic Messaging

Appendix A: Specifications and Reference Data

• Specifications

• Dimensional drawings

• Ordering Information

• Biotechnology, Pharmaceutical Industries, and Sanitary Applications

Appendix B: Approvals

• Product Certifications

• Installation Drawings

Appendix C: Foundation fieldbus Block Information

• Information regarding the Function Blocks

OUNDATION fieldbus Configuration

Transmitter Features of the Rosemount 644 include:

• Accepts inputs from a wide variety of sensors

• Configuration using HART protocol or F

• Electronics that are completely encapsulated in epoxy and enclosed in a metal housing, making the transmitter extremely durable and ensuring long-term reliability

• A compact size and two housing options allowing mounting flexibility for the control room or the field

OUNDATION fieldbus

1-2

Reference Manual

00809-0100-4728, Rev KA July 2010

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)

Rosemount 644

CONSIDERATIONS General Electrical temperature sensors such as RTDs and thermocouples produce

low-level signals proportional to their sensed temperature. The 644 converts the low-level sensor signal to a standard 4–20 mA dc, digital HART, or digital

OUNDATION fieldbus signal that is relatively insensitive to lead length and

F electrical noise. This signal is then transmitted to the control room via two wires.

Commissioning The transmitter can be commissioned before or after installation. It may be

useful to commission it on the bench, before installation, to ensure proper operation and to become familiar with its functionality. Make sure the instruments in the loop are installed in accordance with intrinsically safe, FISCO, or non-incendive field wiring practices.

Mechanical Location

When choosing an installation location and position, take into account the need for access to the transmitter.

Special Mounting

Special mounting hardware is available for mounting a 644 head mount transmitter to a DIN rail, or assembling a new 644 head mount to an existing threaded sensor connection head (former option code L1).

Electrical Proper electrical installation is necessary to prevent errors due to sensor lead

resistance and electrical noise. For best results, shielded cable should be used in electrically noisy environments.

Make wiring connections through the cable entry in the side of the connection head. Be sure to provide adequate clearance for cover removal.

Environmental The transmitter electronics module is permanently sealed within the housing,

resisting moisture and corrosive damage. Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications.

Temperature Effects

The transmitter will operate within specifications for ambient temperatures between –40 and 185 °F (–40 and 85 °C). Heat from the process is transferred from the thermowell to the transmitter housing. If the expected process temperature is near or beyond specification limits, consider the use of additional thermowell lagging, and extension nipple, or a remote mounting configuration to isolate the transmitter from the process.

Figure 1-1 provides an example of the relationship between transmitter housing temperature rise and extension length.

1-3

Rosemount 644

Housing Temperature Rise, Above

Ambient °C (°F)

3 4 5 6 7 8 9

60 (108)

50 (90)

40 (72)

30 (54)

20 (36)

10 (18)

3.6

Extension Length (in.)

815 °C (1500 °F) Oven Temperature

540 °C (1000 °F) Oven Temperature

250 °C (482 °F) Oven Temperature

Figure 1-1. 644 head mount Transmitter Connection Head Temperature Rise vs. Extension Length

Reference Manual

00809-0100-4728, Rev KA

July 2010

Example

The transmitter specification limit is 85 °C. If the ambient temperature is 55 °C and the process temperature to be measured is 800 °C, the maximum permissible connection head temperature rise is the transmitter specification limit minus the ambient temperature (moves 85 to 55 °C), or 30 °C.

In this case, an extension of 100 mm meets this requirement, but 125 mm provides a margin of 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.

The center will ask for the following information:

• Product model

• Serial numbers

• The last process material to which the product was exposed

The center will provide

• A Return Material Authorization (RMA) number

• Instructions and procedures that are necessary to return goods that were exposed to hazardous substances

For other locations, please contact a Emerson Process Management sales representative.

NOTE

If a hazardous substance is identified, a Material Safety Data Sheet (MSDS), required by law to be available to people exposed to specific hazardous substances, must be included with the returned materials.

1-4

Reference Manual

00809-0100-4728, Rev KA July 2010

Rosemount 644

Section 2 Installation

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-3

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-4

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-9

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-13

SAFETY MESSAGES Instructions and procedures in this section may require special precautions to

Warnings

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

• Make sure only qualified personnel perform the installation.

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 Field Communicator in an explosive atmosphere, make sure the instruments in the loop are installed in accordance with instrinsically 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 could result in death or serious injury.

• Do not remove the thermowell while in operation.

• Install and tighten thermowells and sensors before applying pressure

Electrical shock could cause death or serious injury.

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

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Rosemount 644

START

HERE

Bench

Calibration?

BASIC SETUP

Set Sensor Type

Set Number of Wires

Set Units

Set Range Values

Set Damping

VERIFY

Simulate Sensor Input

Within

Specifications?

Refer to Section 4: Foundation

fieldbus Configuration

FIELD INSTALL

Set Failure Mode

Switch

Mount Transmitter

Wire Transmitter

Power Transmitter

FINISHED

Does not apply to the 644 with F

OUNDATION fieldbus

Figure 2-1. Installation Flowchart

Reference Manual

00809-0100-4728, Rev KA

July 2010

2-2

Reference Manual

Transmitter

Mounting Hardware

Rail Clip

Transmitter

Mounting Hardware

Rail Clip

Kit includes replacement bracket and screws.

Existing Threaded Sensor Connection Head

(Former option code L1)

00809-0100-4728, Rev KA July 2010

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 Rail

To attach a head mount transmitter to a DIN rail, assemble the appropriate rail mounting kit (part number 00644-5301-0010) to the transmitter as shown in Figure 2-2. Follow the procedure under “Rail Mount Transmitter and Sensor (HART only)”.

Figure 2-2. Assembling Rail Clip Hardware to a 644H

G-Rail (asymmetric) Top Hat Rail (symmetric)

Figure 2-3. Assembling 644H for Use in an Existing L1 Connection Head

Note: Kit includes Mounting Hardware and both types of Rail Kits.

Retrofitting a 644H for Use in an Existing Threaded Sensor Connection Head

To mount a 644H in an existing threaded sensor connection head (former option code L1), order the 644H retrofit kit (part number 00644-5321-0010). The retrofit kit includes a new mounting bracket and all associated hardware necessary to facilitate the installation of the 644H in the existing head. See Figure 2-3.

2-3

Rosemount 644

INSTALLATION

Reference Manual

00809-0100-4728, Rev KA

July 2010

Typical European Installation

Head Mount Transmitt er with DIN Plate Style Sensor (HART and F

OUNDATION fieldbus)

1. Attach the thermowell to the pipe or process container wall. Install

and tighten the thermowell before applying process pressure.

2. Verify the transmitter failure mode switch (HART only).

3. 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.

4. Wire the sensor to the transmitter (see Figure 2-9 on page 2-11).

5. Insert the transmitter-sensor assembly into the connection head.

Thread the transmitter mounting screw into the connection head mounting holes.Assemble the extension to the connection head. Insert the assembly into the thermowell.

6. Attach a cable gland into the shielded cable.

7. Insert the shielded cable leads into the connection head through the

cable entry. Connect and tighten the cable gland.

8. Connect the shielded power cable leads to the transmitter power

terminals. Avoid contact with sensor leads and sensor connections.

9. Install and tighten the connection head cover. Enclosure covers must

be fully engaged to meet explosion-proof requirements.

A = 644H Transmitter D = Transmitter Mounting Screws B = Connection Head E = Integral Mount Sensor with Flying Leads C = Thermowell F = Extension

2-4

Reference Manual

00809-0100-4728, Rev KA July 2010

Rosemount 644

Typical North American Installation

Head Mount Transmitter with Threaded Sensor (HART and F

OUNDATION fieldbus)

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 environments or to satisfy code requirements.

4. Verify the transmitter failure mode switch (HART only).

5. Pull the sensor wiring leads through the universal head and

transmitter. Mount the transmitter in the universal head by threading the transmitter mounting screws into the universal head mounting holes.

6. Mount the transmitter-sensor assembly into the thermowell. Seal

adapter threads with silicone tape.

7. Install conduit for field wiring to the conduit entry of the universal

head. Seal conduit threads with silicone tape.

8. Pull the field wiring leads through the conduit into the universal head.

Attach the sensor and power leads to the transmitter. Avoid contact with other terminals.

9. Install and tighten the universal head cover. Enclosure covers must

be fully engaged to meet explosion-proof requirements.

A = Threaded Thermowell D = Universal Head B = Threaded Style Sensor E = Conduit Entry C = Standard Extension

2-5

Rosemount 644

Reference Manual

00809-0100-4728, Rev KA

July 2010

Rail Mount Transmitter and Sensor (HART only)

1. Attach the transmitter to a suitable rail or panel.

2. Attach the thermowell to the pipe or process container wall. Install

and tighten the thermowell, according to plant standards, before applying pressure.

3. Attach the sensor to the connection head and mount the entire

assembly to the thermowell.

4. Attach and connect sufficient lengths of sensor lead wire from the

connection head to the sensor terminal block.

5. Tighten the connection head cover. Enclosure covers must be fully

engaged to meet explosion-proof requirements.

6. Run sensor lead wires from the sensor assembly to the transmitter.

7. Verify the transmitter failure mode switch.

8. Attach the sensor wires to the transmitter (see Figure 2-9 on

page 2-11).

A = Rail Mount Transmitter B = Sensor Leads with Cable Glands C = Integral Mount Sensor with Terminal Block D = Connection Head E = Standard Extension F = Threaded Thermowell

2-6

Reference Manual

00809-0100-4728, Rev KA July 2010

Rosemount 644

Rail Mount Transmitter with Threaded Sensor (HART only)

1. Attach the transmitter to a suitable rail or panel.

2. Attach the thermowell to the pipe or process container wall. Install

and tighten the thermowell before applying pressure.

3. Attach necessary extension nipples and adapters. Seal the nipple

and adapter threads with silicone tape.

4. Screw the sensor into the thermowell. Install drain seals if required for

severe environments or to satisfy code requirements.

5. Screw the connection head to the sensor.

6. Attach the sensor lead wires to the connection head terminals.

7. Attach additional sensor lead wires from the connection head to the

transmitter.

8. Attach and tighten the connection head cover. Enclosure covers must

be fully engaged to meet explosion-proof requirements.

9. Set the transmitter failure mode switch

10. Attach the sensor wires to the transmitter (see Figure 2-9 on

page 2-11).

A = Rail Mount Transmitter C = Standard Extension B = Threaded Sensor Connection Head D = Threaded Style Sensor

E = Threaded Thermowell

2-7

Reference Manual

644H

Captive Mounting Screws and Springs

Meter Spacer

LCD Display

10 pin Connector

00809-0100-4728, Rev KA

Rosemount 644

July 2010

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 the transmitter has a meter connector (transmitter revision 5.5.2 or later). After-market installation requires the meter kit (part number 00644-4430-0001), which includes:

• LCD display assembly (includes LCD display, meter spacer, and 2 screws)

• Meter cover with O-ring in place

Figure 2-4. Installing the LCD Display

Use the following procedure to install the meter.

1. If the transmitter is installed in a loop, secure the loop and disconnect

the power. If the transmitter is installed in an enclosure, remove the cover from the enclosure.

2. Decide meter orientation (the meter can be rotated in 90°

increments). To change meter orientation, remove the screws located above and below the display screen. Lift the meter off the meter spacer. Remove the 8-pin plug and re-insert it in the location that will result in the desired viewing orientation.

3. Reattach the meter to the meter spacer using the screws. If the meter

was rotated 90° from its original position it will be necessary to remove the screws from their original holes and re-insert them in the adjacent screws holes.

4. Line up the 10-pin connector with the 10-pin socket and push the

meter into the transmitter until it snaps into place.

5. Attach the meter cover; tighten at least one-third turn after the O-ring

contacts the transmitter housing. The cover must be fully engaged to meet explosion-proof requirements.

6. Use a Field Communicator, AMS software, or a F

OUNDATION fieldbus

Communication tool to configure the meter to the desired display. Refer to “LCD Meter Options ( 644H Only)” for information on configuring the LCD display.

2-8

NOTE

Observe the following LCD display temperature limits: Operating: –4 to 185 °F (–20 to 85 °C) Storage: –50 to 185 °F (–45 to 85 °C)

Reference Manual

Transmitter

No. 1

Transmitter

No. 2

Lead

Readout or

Controller No. 1

Readout or

Controller No. 2

To Additional Transmitters

Power

Supply

Backup

Battery

Between 250  and 1100  if no load resistor.

00809-0100-4728, Rev KA July 2010

Rosemount 644

Multichannel Installations (HART)

In a HART installation, 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 negative power supply terminal. In multichannel installations where several transmitters depend on one power supply and the loss of all transmitters would cause operational problems, consider an uninterrupted power supply or a back-up battery. The diodes shown in Figure 2-5 prevent unwanted charging or discharging of the back-up battery.

Figure 2-5. Multichannel Installations

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 12.0 VDC for HART or 9 VDC for

OUNDATION fieldbus.

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 with the leads and terminals.

NOTE

Do not apply high voltage (e.g., ac line voltage) to the transmitter terminals. Abnormally high voltage can damage the unit. (Sensor and transmitter power terminals are rated to 42.4 VDC. A constant 42.4 volts across the sensor terminals may damage the unit.)

For multichannel HART installations, see above. The transmitters will accept inputs from a variety of RTD and thermocouple types. Refer to Figure 2-6 on page 2-10 when making sensor connections. Refer to Figure 2-8 on page 2-10 for F

OUNDATION fieldbus installations.

Use the following steps to wire the power and sensor to the transmitter:

1. Remove the terminal block cover (if applicable).

2. Connect the positive power lead to the “+” terminal. Connect the

negative power lead to the “–” terminal (see Figure 2-7).

3. Tighten the terminal screws. When tightening the sensor and power

wires, the max torque is 6-in.-lbs (0.7 N-m).

4. Reattach and tighten the cover (if applicable).

5. Apply power (see “Power Supply”).

2-9

Rosemount 644

1 2 3 4

Sensor

Terminals

Communication

Terminals

Power Terminals

Sensor Terminals

Power/ Configuration Terminals

Max torque is 6 in.-lbs (0/7 N-m)

250  RL  1100 

Power

Supply

Field

Communicator

250  RL  1100 

Power

Supply

Field Communicator

Power

Supply

6234 ft (1900 m) max

(depending upon cable characteristics)

Integrated Power

Conditioner and Filter

Terminators

(Spur)

(Trunk)

(The power supply,

filter, first

terminator, and

configuration

tool are typically

located in the

control room.)

Devices 1

through 16

OUNDATION

fieldbus

Configuration

Tool

Power/

Signal Wiring

Reference Manual

00809-0100-4728, Rev KA

July 2010

Figure 2-6. Transmitter Power, Communication, and Sensor Te rm i na l s

Figure 2-7. Connecting a HART Communication Tool to a Transmitter Loop

644H 644 Rail Mount

Figure 2-8. Connecting a F

OUNDATION fieldbus Host

System to a Transmitter Loop

2-10

Note: Signal loop may be grounded at any point or left ungrounded. Note: A Field Communicator may be connected at any termination point in the signal loop. The signal

Note: Max torque is 6 in.-lbs (0/7 N-m)

loop must have between 250 and 1100 ohms load for communications.

Reference Manual

2-wire

RTD and 

3-wire RTD

and 

4-wire RTD

and 

T/C

and mV

1234

00809-0100-4728, Rev KA July 2010

Rosemount 644

Sensor Connections The 644 is compatible with a number of RTD and thermocouple sensor types.

Figure 2-9 shows the correct input connections to the sensor terminals on the transmitter. To ensure a proper sensor connection, anchor the sensor lead wires into the appropriate compression terminals and tighten the screws.

Figure 2-9. Sensor Wiring Diagrams

* 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 withelectrical tape.

Thermocouple or Millivolt Inputs

The thermocouple can be connected directly to the transmitter. Use appropriate thermocouple extension wire if mounting the transmitter remotely from the sensor. Make millivolt inputs connections with copper wire. Use shielding for long runs of wire.

644 Sensor Connections Diagram

RTD or Ohm Inputs

The transmitters will accept a variety of RTD configurations, including 2-wire, 3-wire, 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 only two leads, both RTD leads are in series with the sensor element, so significant errors can occur if the lead lengths exceed three feet of 20 AWG wire (approximately 0.05 °C/ft). For longer runs, attach a third or fourth lead as described above.

Sensor Lead Wire Resistance Effect– RTD Input

When using a 4-wire RTD, the effect of lead resistance is eliminated and has no impact on accuracy. However, a 3-wire sensor will not fully cancel lead resistance error because it cannot compensate for imbalances in resistance between the lead wires. Using the same type of wire on all three lead wires will make a 3-wire RTD installation as accurate as possible. A 2-wire sensor will produce the largest error because it directly adds the lead wire resistance to the sensor resistance. For 2- and 3-wire RTDs, an additional lead wire resistance error is induced with ambient temperature variations. The table and the examples shown below help quantify these errors.

2-11

Rosemount 644

Basic Error

Imbalance of Lead Wires



PtRo



------------------------------------------------------------------=

Error due to amb. temp. variation



T

amb

 Imbalance of Lead Wires



Ro

-------------------------------------------------------------------------------------------------------------------------=

Basic error

0.5 

0.00385  /  C100 

--------------------------------------------------------------------------------- - 1.3 C==

Error due to amb. temp. var. of 25 °C

0.0039  /  C25  C 0.5 

0.00385  /  C100

-------------------------------------------------------------------------------------------------------

0.1266 C==

Basic Error

Lead Wire Resistance



PtRo



----------------------------------------------------------=

Error due to amb. temp. variation



T

amb

 Lead Wire Resistance



Ro

-----------------------------------------------------------------------------------------------------------------=

Basic error

7.5 

0.00385  /  C100 

--------------------------------------------------------------------------------- - 19.5 C==

Error due to amb. temp. var. of 25 °C

0.0039  /  C25  C 7.5 

0.00385  /  C100

-------------------------------------------------------------------------------------------------------

1.9  C==

Table 2-1. Examples of Approximate Basic Error

Reference Manual

00809-0100-4728, Rev KA

July 2010

Sensor Input Approximate Basic Error

4-wire RTD None (independent of lead wire resistance) 3-wire RTD ± 1.0  in reading per ohm of unbalanced lead wire resistance

(Unbalanced lead wire resistance = maximum imbalance between any two leads.)

2-wire RTD 1.0  in reading per ohm of lead wire resistance

Examples of Approximate Lead Wire Resistance Effect Calculations Given:

Total cable length: 150 m Imbalance of the lead wires at 20 °C: 1.5  Resistance/length (18 AWG Cu): 0.025 /m °C Temperature coefficient of Cu (Cu): 0.039 / °C Temperature coefficient of Pt(Pt): 0.00385 / °C Change in Ambient Temperature (T RTD Resistance at 0 °C (Ro): 100  (for Pt 100 RTD)

• Pt100 4-wire RTD: No lead wire resistance effect.

• Pt100 3-wire RTD:

): 25 °C

amb

Lead wire imbalance seen by the transmitter = 0.5



• Pt100 2-wire RTD:

Lead wire resistance seen by the transmitter = 150 m × 2 wires ×

0.025

/m = 7.5 

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Reference Manual

4–20 mA dc

1322 1100

1000

750 500 250

1012.0 20 30 40 42.4

Load (Ohms)

Supply Voltage (VDC)

Operating

Region

00809-0100-4728, Rev KA July 2010

POWER SUPPLY HART Installation

To communicate with a transmitter, a 18.1 VDC minimum power supply is required. The power supplied to the transmitter should not drop below the transmitter lift-off voltage (see Figure 2-10). If the power drops below the lift-off voltage while the transmitter is being configured, the transmitter may interpret the configuration information incorrectly.

The dc power supply should provide power with less than 2 percent ripple. The total resistance load is the sum of the resistance of the signal leads and the load resistance of any controller, indicator, or related pieces of equipment in the loop. Note that the resistance of intrinsic safety barriers, if used, must be included.

Figure 2-10. Load Limits

Rosemount 644

Maximum Load = 40.8 x (Supply Voltage – 12.0)

OUNDATION fieldbus Installation

Powered over F

OUNDATION fieldbus with standard fieldbus power supplies.

The transmitter operates between 9.0 and 32.0 VDC, 11 mA maximum. Transmitter power terminals are rated to 42.4 VDC.

The power terminals on the 644 with F

OUNDATION fieldbus are polarity

insensitive.

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Reference Manual

Sensor Wires

OUNDATION fieldbus segment

or 4–20 mA loop

Shield ground point

Connect shields together, electrically isolated from the transmitter.

Transmitter

00809-0100-4728, Rev KA

Rosemount 644

July 2010

Ground the Transmitter The transmitter will operate with the current signal loop either floating or

grounded. However, the extra noise in floating systems affects many types of readout devices. If the signal appears noisy or erratic, grounding the current signal loop at a single point may solve the problem. The best place to ground the loop is at the negative terminal of the power supply. Do not ground the current signal loop at more than one point.

The transmitter is electrically isolated to 500 V DC/AC rms (707 VDC), so the input circuit may also be grounded at any single point. When using a grounded thermocouple, the grounded junction serves as this point.

Neither side of the loop should be grounded on F

OUNDATION fieldbus devices.

Only the shield wire should be grounded.

NOTE

Do not ground the signal wire at both ends.

Ungrounded Thermocouple, mV, and RTD/Ohm Inputs

Each process installation has different requirements for grounding. Use the grounding options recommended by the facility for the specific sensor type, or begin with grounding Option 1 (the most common).

Option 1:

1. Connect signal wiring shield to the sensor wiring shield.

2. Ensure the two shields are tied together and electrically isolated from

the transmitter housing.

3. Ground shield at the power supply end only.

4. Ensure that the sensor shield is electrically isolated from the

surrounding grounded fixtures.

2-14

Option 2:

1. Connect sensor wiring shield to the transmitter housing (only if the

housing is grounded).

2. Ensure the sensor shield is electrically isolated from surrounding

fixtures that may be grounded.

3. Ground signal wiring shield at the power supply end.

Rosemount 644

Sensor Wires

Shield ground point

Transmitter

OUNDATION fieldbus segment

or 4–20 mA loop

Sensor Wires

Shield ground point

Transmitter

OUNDATION fieldbus segment

or 4–20 mA loop

Sensor Wires

Shield ground point

Transmitter

OUNDATION fieldbus segment

or 4–20 mA loop

Reference Manual

00809-0100-4728, Rev KA

July 2010

Option 3:

1. Ground sensor wiring shield at the sensor, if possible.

2. Ensure that the sensor wiring and signal wiring shields are electrically

isolated from the transmitter housing.

3. Do not connect the signal wiring shield to the sensor wiring shield.

4. Ground signal wiring shield at the power supply end.

Grounded Thermocouple Inputs

1. Ground sensor wiring shield at the sensor.

2. Ensure that the sensor wiring and signal wiring shields are electrically

isolated from the transmitter housing.

3. Do not connect the signal wiring shield to the sensor wiring shield.

4. Ground signal wiring shield at the power supply end.

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Rosemount 644

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July 2010

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Reference Manual

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Section 3 HART Configuration

Rosemount 644

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 3-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1

Field Communicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-3

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-3

Multidrop Communication . . . . . . . . . . . . . . . . . . . . . . . . . page 3-18

Operation and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . page 3-19

OVERVIEW This section provides information on configuring, troubleshooting, operating,

and maintaining the Rosemount 644 with HART protocol.

SAFETY MESSAGES Instructions and procedures in this section may require special precautions to

Warnings

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

• Make sure only qualified personnel perform the installation.

Explosions could result in death or serious injury.

• Do not remove the connection head cover in explosive atmospheres when the circuit is live.

• 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 could result in death or serious injury.

• Do not remove the thermowell while in operation.

• Install and tighten thermowells and sensors before applying pressure

Electrical shock could cause death or serious injury.

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

HART

www.rosemount.com

HART

Reference Manual

00809-0100-4728, Rev KA

Rosemount 644

July 2010

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. To protect against high-energy transients, install the transmitter into a suitable connection head with the Rosemount 470 Transient Protector. Refer to the 470 Transient Protector Product Data Sheet (document number 00813-0100-4191) for more information.

COMMISSIONING The 644 must be configured for certain basic variables to operate. In many

cases, all of these variables are pre-configured at the factory. Configuration may be required if the transmitter is not configured or if the configuration variables need revision.

Commissioning consists of testing the transmitter and verifying transmitter configuration data. 644 transmitters can be commissioned either before or after installation. Commissioning the transmitter on the bench before installation using a Field Communicator or AMS ensures that all transmitter components are in working order.

To commission on the bench, connect the transmitter and the Field Communicator or AMS as shown in Figure 2-7 on page 2-10. Make sure the instruments in the loop are installed according to intrinsically-safe or non-incendive field wiring practices before connecting a communication in an explosive atmosphere. Connect HART Communication leads at any termination point in the signal loop. For convenience, connect them to the terminals labeled “COMM” on the terminal block. Connecting across the “TEST” terminals will prevent successful communication. Avoid exposing the transmitter electronics to the plant environment after installation by setting all transmitter jumpers during the commissioning stage on the bench.

When using a Field Communicator, any configuration changes made must be sent to the transmitter by using the “Send” key (F2). AMS configuration changes are implemented when the “Apply” button is clicked.

For more information on using the Field Communicator with the 644 transmitter, see Section 3: HART Configuration.

Setting the Loop to Manual

When sending or requesting data that would disrupt the loop or change the output of the transmitter, set the process application loop to manual. The Field Communicator or AMS will prompt you to set the loop to manual when necessary. Acknowledging this prompt does not set the loop to manual. The prompt is only a reminder; set the loop to manual as a separate operation.

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. Saturation levels are

3.90 mA for standard configuration (3.8 mA if configured for NAMURcompliant operation) on the low end and 20.5 mA for standard or NAMURcompliant configuration on the high end, if the sensor temperature is outside of range limits. These values are also custom configurable by the factory or using the Field Communicator.

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Rosemount 644

The values to which the transmitter drives its output in failure mode depend on whether it is configured to standard, NAMUR-compliant, or custom operation. See “Hardware and Software Failure Mode” on page A-7 for standard and NAMUR-compliant operation parameters.

Changing Switch Positions

To change the failure mode on the 644 transmitter, follow the steps below.

1. If applicable, remove the enclosure cover.

2. Locate the orange failure mode switch. On the 644H the switch is located near the power terminals and located in the center of the front panel on the 644 rail mount (see Figure 2-6).

3. Move the switch to the desired alarm setting. To set the failure mode to high alarm, position the switch toward the “HI” mark on the terminal block. To set the failure mode to low alarm, position the switch in the opposite direction.

4. Replace the enclosure cover (if applicable). Enclosure covers must be fully engaged to meet explosion-proof requirements.

FIELD COMMUNICATOR The Field Communicator exchanges information with the transmitter from the

control room, the instrument site, or any wiring termination point in the loop. To facilitate communication, connect the Field Communicator in parallel with the transmitter (see Figure 2-11). Use the loop connection ports on the rear panel of the Field Communicator. The connections are non-polarized. Do not make connections to the serial port or the NiCad recharger jack in explosive atmospheres. Before connecting the Field Communicator in an explosive atmosphere, make sure the instruments in the loop are installed in accordance with intrinsically safe or non-incendive field wiring practices.

For more information regarding the Field Communicator, please see the Field Communicator Reference Manual.

HART

CONFIGURATION The 644 transmitter can be configured either on-line or off-line using a Field

Communicator or AMS. During on-line configuration, the transmitter is connected to a Field communicator. Data is entered in the working register of the communicator and sent directly to the transmitter. Off-line configuration consists of storing configuration data in a Field Communicator while it is not connected to a transmitter. Data is stored in nonvolatile memory and can be downloaded to the transmitter at a later time.

3-3

HART

The review menu lists all of the information stored in the 644. This includes device information, measuring element, output configuration, and software revision

1. TEST DEVICE

2. CALIBRATION

3. Write Protect

On-line Menu

1. Snsr 1 Digital Reading

2. Terminal Digital Reading

1. Snsr 1 Input Trim

2. Snsr 1 Trim-Fact

3. Active Calibrator

1. Loop Test

2. Self test

3. Master Reset

4. Status

1. SNSR 1 TRIM

2. D/A trim

3. Scaled D/A trim

1. Revision #s

2. Sensor Review

3. Dev Outputs Review

4. Device Information

5. Measurement Filtering

1. PROCESS VARIABLES

2. DIAGNOSTICS AND SERVICE

3. CONFIGURA TION

4. REVIEW

1. VARIABLE MAPPING

2. SENSOR CONFIGURATION

3. DEVICE OUTPUT CONFIGURATION

4. DEVICE INFORMATION

5. MEASUREMENT FILTERING

1. TRANSMITTER VARS

2. PV is

3. PV Digital Reading

4. PV AO

5. PV% rnge

6. PV LRV

7. PV URV

8. PV Lower Sensor Limits

9. PV Upper Sensor Limits

10.PV Damping

1. DEVICE SETUP

2. PV is

3. PV

4. PV AO

5. % RNGE

6. PV LRV

7. PV URV

1. PV is

2. SV is

3. TV is

4. QV is

5. Variable re-map

1. SENSOR 1

2. TERMINAL TEMP

1. Connections

2. SNSR 1 SETUP

3. CAL VANDUSEN

4. Sensor S/N

1. Terminal Units

2. Terminal Damp

3. Terminal LSL

4. Terminal USL

1. PV RANGE VALUES

2. ALARM SATURATION

3. HART OUTPUT

4. LCD METER OPTIONS

1. AO Alarm Type

2. Low Alarm

3. High Alarm

4. Low Sat.

5. High Sat.

1. Poll Addr

2. Num Req Preams

3. Burst Mode

4. Burst Option

1. Meter Configuration

2. Meter Decimal Pt

1. Tag

2. Date

3. Descriptor

4. Message

5. Final Assembly number

1. 50/60 Hz Filter

2. Active Calibrator

3. Open Sensor Holdoff

4. Intermit Detect

5. Intermit Thresh

1. 2-wire Offset

2. Snsr 1 Units

3. Snsr 1 Damp

4. Snsr LSL

5. Snsr USL

1. R0

2. Alpha

3. Delta

4. Beta

1. PV LRV

2. PV URV

3. PV Damping

4. PV Units

5. Apply Values

6. PV LSL

7. PV USL

8. PV Min. Span

These numbers are to be entered by the user.

When the hardware alarm switches are changed, the communicator should be power cycled to see new readings.

Reference Manual

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Rosemount 644

July 2010

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. Field Communicator Menu Tree

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Rosemount 644

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 644H, as noted in the following pages. Table 3-1 provides alphabetical function lists for all Field Communicator tasks as well as their corresponding fast key sequences.

Table 3-1. 644 Fast Key

Sequence

Function Fast Keys Function Fast Key

Active Calibrator 1, 2, 2, 1, 3 Num Req Preams 1, 3, 3, 3, 2 Alarm/Saturation 1, 3, 3, 2 Open Sensor Holdoff 1, 3, 5, 3 AO Alarm Type 1, 3, 3, 2, 1 Percent Range 1, 1, 5 Burst Mode 1, 3, 3, 3, 3 Poll Address 1, 3, 3, 3, 1 Burst Option 1, 3, 3, 3, 4 Process Temperature 1, 1 Calibration 1, 2, 2 Process Variables 1, 1 Callendar-Van Dusen 1, 3, 2, 1 PV Damping 1, 3, 3, 1, 3 Configuration 1, 3 PV Unit 1, 3, 3, 1, 4 D/A Trim 1, 2, 2, 2 Range Values 1, 3, 3, 1 Damping Values 1, 1, 10 Review 1, 4 Date 1, 3, 4, 2 Scaled D/A Trim 1, 2, 2, 3 Descriptor 1, 3, 4, 3 Sensor Connection 1, 3, 2, 1, 1 Device Info 1, 3, 4 Sensor 1 Setup 1, 3, 2, 1, 2 Device Output Configuration 1, 3, 3 Sensor Serial Number 1, 3, 2, 1, 4 Diagnostics and Service 1, 2 Sensor 1 Trim 1, 2, 2, 1 Filter 50/60 Hz 1, 3, 5, 1 Sensor 1 Trim-Factory 1, 2, 2, 1, 2 Hardware Rev 1, 4, 1 Sensor Type 1, 3, 2, 1, 1 Hart Output 1, 3, 3, 3 Software Revision 1, 4, 1 Intermittent Detect 1, 3, 5, 4 Stat us 1, 2, 1, 4 LCD Display Options 1, 3, 3, 4 Tag 1, 3, 4, 1 Loop Test 1, 2, 1, 1 Terminal Temperature 1, 3, 2, 2, LRV (Lower Range Value) 1, 1, 6 Test Device 1, 2, 1 LSL (Lower Sensor Limit) 1, 1, 8 URV (Upper Range Value) 1, 1, 7 Measurement Filtering 1, 3, 5 USL (Upper Sensor Limit) 1, 1, 9 Message 1, 3, 4, 4 Variable Mapping 1, 3, 1 Meter Configuring 1, 3, 3, 4, 1 Variable Re-Map 1, 3, 1, 5 Meter Decimal Point 1, 3, 3, 4, 2 Write Protect 1, 2, 3

2-Wire Offset 1, 3, 2, 1, 2, 1

HART

3-5

HART

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Rosemount 644

AMS One of the key benefits of intelligent devices is the ease of device

configuration. When used with AMS, the 644 is easy to configure and provides instant and accurate alerts and alarms. The main configuration screen of the 644 is the “Configuration Properties” screen. From this screen, the transmitter set-up can easily be viewed and edited.

The screens use a color-coding to give visual indication of the transmitter health and to indicate any changes that may need to be made or written to the transmitter.

• Gray screens: indicates that all information has been written to the transmitter

• Yellow on screen: changes have been made in the software but not sent to the transmitter

• Green on screen: all current changes on screen have been written to the transmitter

• Red on screen: indicates an alarm or alert that requires immediate investigation

July 2010

Apply AMS Changes Changes made in the software must be sent to the transmitter in order for the

changes to take effect in the process.

1. From the bottom of the “Configuration Properties” screen, click Apply.

2. An “Apply Parameter Modification” screen appears, enter desired

information and click OK.

3. After carefully reading the warning provided, select OK.

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Rosemount 644

Review Configuration Data

Before operating the 644 in an actual installation, review all of the factory-set configuration data to ensure that it reflects the current application.

Review

Fast Key Sequence 1, 4

When activating the Review function, scroll through the configuration data list

to check each process variable. If changes to the transmitter configuration data are necessary, refer to “Configuration” below.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the tabs to review the transmitter configuration data.

Check Output Before performing other transmitter on-line operations, review the 644 digital

output parameters to ensure that the transmitter is operating properly.

Process Variables

Fast Key Sequence 1, 1

The Process Variables menu displays process variables, including sensor

temperature, percent of range, analog output, and terminal temperature. These process variables are continuously updated. The primary variable is the 4 –20 mA analog signal. The secondary variable is the transmitter terminal temperature.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Analog Output tab to review the transmitter Analog Output Range.

HART

Configuration The 644 must be configured for certain basic variables in order to be

operational. In many cases, all of these variables are pre-configured at the factory. Configuration may be required if the transmitter is not configured or if the configuration variables need revision.

Variable Mapping

Fast Key Sequence 1, 3, 1

The Variable Mapping menu displays the sequence of the process variables. When using the 644H you can select 5 Variable Re-Map to change this configuration. When the Select PV screen appears Snsr 1 must be selected. Either Sensor 1, Terminal Temperature, or not used can be selected for the

remaining variables. The primary variable is the 4–20 mA analog signal.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Analog Output tab to review the Mapped Variable Output.

Apply changes made (see “Apply AMS Changes” on page 3-6).

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Rosemount 644

Reference Manual

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July 2010

Select Sensor Type

Fast Key Sequence 1, 3, 2, 1, 1

HART

The Connections command allows selection of the sensor type and the

number of sensor wires to be connected. Select from the following sensors:

• 2-, 3-, or 4-wire Pt 100, Pt 200, Pt 500, Pt 1000 RTDs:  = 0.00385 //°C

• 2-, 3-, or 4-wire Pt 100:  = 0.003916 //°C

• 2-, 3-, or 4-wire Ni 120 nickel RTDs

• 2-, 3-, or 4-wire Cu 10 RTDs

• IEC/NIST/DIN Type B, E, J, K, R, S, T thermocouples

• DIN type L, U thermocouples

• ASTM Type W5Re/W26Re thermocouple

• –10 to 100 millivolts

• 2-, 3-, or 4-wire 0 to 2000 ohms

Contact a Emerson Process Management representative for information on the temperature sensors, thermowells, and accessory mounting hardware that is available through Emerson Process Management.

AMS

Right click on the device and select “Sensor Connections,” then select

“Sensor 1 Config.“Select “Sensor Connections.” The wizard will walk

through the screens.

Sensor Serial Number

Fast Key Sequence 1, 3, 2, 1, 4

The Sensor S/N variable provides a location to list the serial number of the

attached sensor. It is useful for identifying sensors and tracking sensor calibration information.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Snsr 1 tab to configure the Snsr S/N.

Apply changes made (see “Apply AMS Changes” on page 3-6).

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:

• Degrees Celsius

• Degrees Fahrenheit

• Degrees Rankine

• Kelvin

•Ohms

• Millivolts

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Rosemount 644

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Snsr 1 tab to configure the Sensor Output Units. Set the units to the desired output.

Apply changes made (see “Apply AMS Changes” on page 3-6).

50/60 Hz Filter

Fast Key Sequence 1, 3, 5, 1

The 50/60 Hz Filter command sets the transmitter electronic filter to reject the

frequency of the AC power supply in the plant.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Electronics tab to configure the output frequency.

Apply changes made (see “Apply AMS Changes” on page 3-6).

Terminal Temperature

Fast Key Sequence 1, 3, 2, 2

The Terminal Temp command sets the terminal temperature units to indicate

the temperature at the transmitter terminals.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Electronics tab to configure the Terminal Temperature. In the Terminal Temperature box, set the Terminal Units to the desired output.

Apply changes made (see “Apply AMS Changes” on page 3-6).

LCD Meter Options ( 644H Only)

Fast Key Sequence 1, 3, 3, 4

HART

The LCD Meter Option command sets the meter options, including

engineering units and decimal point. Change the meter settings to reflect necessary configuration parameters when adding a meter or reconfiguring the transmitter.

To customize variables that the meter displays, follow the steps below:

1. From the home screen select 1 Device Setup, 3 Configuration, 3Dev

Output Config, 4 LCD Meter Options, and 1 Meter Config.

2. Use the F2 key to turn each of the following options OFF or ON:

Sensor 1, Terminal Temp, Percent Of Range, Analog Output. As

many outputs as desired an be turned ON at once.

3. Press F4, ENTER, and then F2, SEND, to send the information to the

transmitter. The LCD display will scroll through the outputs selected in step 2.

To change the decimal point configuration, perform the following steps:

1. From the home screen select 1 Device Setup, 3 Configuration, 3Dev

Output Config, 4 LCD Meter Options, and 1 Meter Decimal Pt.

2. Choose from Floating Precision or One-, Two-, Three-, or Four-Digit

Precision by pressing F4, ENTER. Press F2 to send the information

to the transmitter.

3-9

HART

Damped Value NP–

2TU– 2TU

----------------- -







P=

P =previous damped value

N =new sensor value

T = damping time constant

Rosemount 644

Reference Manual

00809-0100-4728, Rev KA

July 2010

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Device tab to configure the LCD. From the LCD Meter box, define the Meter Config, Meter Decimal Pt.

Apply changes made (see “Apply AMS Changes” on page 3-6).

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. The default damping value is 5.0 seconds and can be reset to any value between 0 and 32 seconds.

The value chosen for damping affects the response time of the transmitter. When set to zero (or disabled), the damping function is off and the transmitter output reacts to changes in input as quickly as the intermittent sensor algorithm allows (refer to “Intermittent Threshold” on page 3-16 for a description of the intermittent sensor algorithm). Increasing the damping value increases the transmitter response time.

With damping enabled, if the temperature change is within 0.2% of the sensor limits, the transmitter measures the change in input every 500 milliseconds and outputs values according to the following relationship:

At the value to which the damping time constant is set, the transmitter output is at 63% of the input change and it continues to approach the input according to the damping equation above.

For example, as illustrated in Figure 3-2, if the temperature undergoes a step change—within 0.2% of the sensor limits—from 100 degrees to 110 degrees, and the damping is set to 5.0 seconds, the transmitter calculates and reports a new reading every 500 milliseconds using the damping equation. At 5.0 seconds, the transmitter outputs 106.3 degrees, or 63% of the input change, and the output continues to approach the input curve according to the equation above.

For information regarding the damping function when the input change is greater than 0.2% of the sensor limits, refer to “Intermittent Threshold” on page 3-16.

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Figure 3-2. Change in Input vs. Change in Output with Damping Set to Five Seconds

Rosemount 644

HART

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Snsr 1 tab and apply damping requirements.

Apply changes made (see “Apply AMS Changes” on page 3-6).

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. Due to a lack of lead wire compensation within the RTD, temperature measurement made with a 2-wire RTD are often inaccurate. See “Sensor Lead Wire Resistance Effect– RTD Input” on page 2-11 for more information.

To utilize this feature perform the following steps:

1. Measure the lead wire resistance of both RTD leads after installing

the 2-wire RTD and the 644H.

2. From the HOME screen, select 1 Device Setup, 3 Configuration,

2 Sensor Configuration, 1 Sensor 1, 2 Snsr 1 Setup, and 1 2-Wire Offset.

3. Enter the total measured resistance of the two RTD leads at the

2-Wire Offset prompt. Enter this resistance as a negative (–) value to

ensure proper adjustment.The transmitter then adjusts its temperature measurement to correct the error caused by lead wire resistance.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Snsr 1 tab to configure the 2 Wire Offset.

Apply changes made (see “Apply AMS Changes” on page 3-6).

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Rosemount 644

Information Variables Access the transmitter information variables on-line using the Field

Communicator or other suitable communications device. The following is a list of transmitter information variables. These variables include device identifiers, factory-set configuration variables, and other information. A description of each variable, the corresponding fast key sequence, and a review of its purposes are provided.

Tag

Fast Key Sequence 1, 3, 4, 1

The Tag variable is the easiest way to identify and distinguish between

transmitters in multi-transmitter environments. Use it to label transmitters electronically according to the requirements of the application. The tag defined is automatically displayed when a Field Communicator establishes contact with the transmitter at power-up. The tag may be up to eight characters long and has no impact on the primary variable readings of the transmitter.

Date

Fast Key Sequence 1, 3, 4, 2

July 2010

The Date command is a user-defined variable that provides a place to save

the date of the last revision of configuration information. It has no impact on the operation of the transmitter or the Field Communicator.

Descriptor

Fast Key Sequence 1, 3, 4, 3

The Descriptor variable provides a longer user-defined electronic label to

assist with more specific transmitter identification than is available with the tag variable. The descriptor may be up to 16 characters long and has no impact on the operation of the transmitter or the Field Communicator.

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. The message variable has no impact on the operation of the transmitter or the Field Communicator.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Device tab to enter alphanumeric device information.

Apply changes made (see “Apply AMS Changes” on page 3-6).

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Diagnostics and Service Test Device

Fast Key Sequence 1, 2, 1

The Test Device command initiates a more extensive diagnostics routine than that performed continuously by the transmitter. The T est Device menu lists the

following options:

• 1 Loop test verifies the output of the transmitter, the integrity of the

loop, and the operations of any recorders or similar devices installed in the loop. See “Loop Test” below for more information.

• 2 Self Test initiates a transmitter self test. Error codes are displayed if

there is a problem.

• 3 Master Reset sends out a command that restarts and tests the

transmitter. A master reset is like briefly powering down the transmitter. Configuration data remains unchanged after a master reset.

• 4 Status lists error codes. ON indicates a problem, and OFF means

there are no problems.

Loop Test

Fast Key Sequence 1, 2, 1, 1

Rosemount 644

HART

The Loop Test command verifies the output of the transmitter, the integrity of

the loop, and the operations of any recorders or similar devices installed in the loop. To initiate a loop test, perform the following procedure:

1. Connect a reference meter to the transmitter. To do so, shunt

the transmitter power through the meter at some point in the loop.

2. 644H: From the HOME screen, select 1 Device Setup, 2 Diag/Serv, 1

Test Device, 1 Loop Test before performing a loop test. 644 rail mount, select 1 Device Setup, 2 Diagnostics and Service, 2 Loop Test. Select OK after setting the control loop to manual. The

communicator displays the loop test menu.

3. Select a discreet milliampere level for the transmitter to output. At the

CHOOSE ANALOG OUTPUT prompt, select 1 4mA, 2 20mA, or select 3 other to manually input a value between 4 and 20 mA.

4. Check the current meter installed in the test loop to verify that it reads

the value that was commanded to output. If the readings do not match, either the transmitter requires an output trim or the current meter is malfunctioning.

After completing the test procedure, the display returns to the loop test screen and another output value can be chosen.

AMS

Right click and select “Diagnostics and Test.” Select “Loop Test.” The loop test wizard will walk through the process to fix the output for the sensor.

The transmitter must be returned to normal conditions (turn off loop test) before placing back in process

Right click and select “Diagnostics and Test.” Select “Loop Test.” The loop test wizard will walk through the process to fix the analog output. From the

reen choose “END.” A message will appear indicating

loop test wizard s

that it is OK to return to normal.

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Master Reset

Fast Key Sequence 1, 2, 1, 3

HART

Master Reset resets the electronics without actually powering down the unit. It

does not return the transmitter to the original factory configuration.

AMS

Right click on the device and select “Diagnostics and Test” from the menu. Choose “Master Reset.”

The wizard will perform the reset.

Active Calibrator

Fast Key Sequence 1, 2, 2, 1, 3

The Active Calibrator Mode command enables or disables the pulsating

current feature. The transmitter ordinarily operates with pulsating current so that sensor diagnostic functions, such as open sensor detection and EMF compensation, can be performed correctly. Some calibration equipment requires steady current to function properly. By enabling the Active Calibrator Mode the transmitter stops sending pulsating current to the sensor and supples a steady current. Disabling the Active Calibrator returns the transmitter to its normal operating state of sending a pulsating current to the sensor, thus enabling the sensor diagnostic functions.

The Active Calibrator Mode is volatile and will be automatically disabled when power is cycled or when a Master Reset is performed using the Field Communicator.

NOTE

The Active Calibrator Mode must be disabled before returning the transmitter to the process. This will ensure that the full diagnostic capabilities of the 644 are available.

3-14

Disabling or enabling the Active Calibrator Mode will not change any of the sensor trim values stored in the transmitter.

Sensor Review

Fast Key Sequence 1, 4, 2

The Signal Condition command allows viewing or changing the primary

variable lower and upper range values, sensor percent of range, and sensor damping.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Snsr 1 tab and review sensor configuration.

Apply changes made (see “Apply AMS Changes” on page 3-6).

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Rosemount 644

Write Protect

Fast Key Sequence 1, 2, 3

The Write Protect command allows you to protect the transmitter

configuration data from accidental or unwarranted changes. To enable the write protect feature, perform the following procedure:

1. From the HOME screen select 1 Device Setup, 2 Diag/Service,

3 Write Protect.

2. Select Enable WP.

NOTE

To disable write protect on the 644, repeat the procedure, replacing Enable WP with Disable WP.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Basic Setup tab and enable WP.

Apply changes made (see “Apply AMS Changes” on page 3-6).

HART

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.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the HART tab to configure HART multidrop addressing.

Apply changes made (see “Apply AMS Changes” on page 3-6).

Alarm and Saturation

Fast Key Sequence 1, 3, 3, 2

The Alarm/Saturation command allows the alarm settings (Hi or Low) and

saturation values to be viewed and changed. To change the alarm values and

saturation values, select the value to be changed, either 2 Low Alarm, 3 High Alarm, 4 Low Sat., or 5 High Sat. Enter the desired new value, which must fall

within the guidelines given below.

• The low alarm value must be between 3.30 and 3.75 mA

• The high alarm value must be between 21.0 and 23.0 mA

• The low saturation level must be between the low alarm value plus 0.1 mA and 3.9 mA.

Example: saturation level, S, must be 3.8  S  3.9 mA.

Example: saturation level, S, must be 20.5  S  20.7 mA.

The low alarm value has been set to 3.7 mA. Therefore, the low

• The high saturation level must be between 20.5 mA and the high alarm value minus 0.1 mA.

The high alarm value has been set to 20.8 mA. Therefore, the low

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AMS

For AMS, configure the sensor as indicated above.

HART

Right click on the device and select “Configuration Properties” from the menu. Select the Analog Output tab to define the alarm and saturation levels. From the Alarm box, enter the low and high alarm and the low and high saturation.

Apply changes made (see “Apply AMS Changes” on page 3-6).

Rerange

Reranging the transmitter sets the measurement range to the limits of expected readings. Setting the measurement range to the limits of expected readings maximizes transmitter performance; the transmitter is most accurate when operated within the expected temperature range for your application.

PV Range Values

Fast Key Sequence 1, 3, 3, 1

The PV URV and PV LRV commands, found in the PV Range Values menu

screen, allow the user to set the transmitter’s lower and upper range values using limits of expected readings. The range of expected readings is defined by the Lower Range Value (LRV) and Upper Range Value (URV). The transmitter range values can be reset as often as necessary to reflect

changing process conditions. From the PV Range Values screen select 1 PV LRV to change the lower range value and 2 PV URV to change the upper

range value.

NOTE:

The rerange functions should not be confused with the trim functions. Although the rerange command matches a sensor input to a 4–20 mA output, as in conventional calibration, it does not affect the transmitter’s interpretation of the input.

3-16

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Basic Setup tab and set the URV and LRV.

Apply changes made (see “Apply AMS Changes” on page 3-6).

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. However, the transmitter may briefly output a false temperature reading for up to one update in either direction (see Figure 3-4 on page 3-18) up to the threshold value (100% of sensor limits if Intermittent

Sensor Detect is OFF). Unless rapid response rate is necessary, the suggested setting of the Intermittent Sensor Detect mechanism is ON with 2% threshold.

Reference Manual

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

Transmitter Output (mA)

Time (seconds)

When Intermittent Sensor Detect is OFF, a false temperature output is possible when an open sensor condition is detected. A false temperature output in either direction up to the threshold value (100 % of sensor limits if Intermittent Sensor Detect is OFF) is possible when an open sensor condition is detected.

Normal open sensor responses

High Alarm

00809-0100-4728, Rev KA July 2010

Figure 3-3. Open Sensor Response

Rosemount 644

HART

Intermittent Sensor Detect (Advanced Feature)

The Intermittent Sensor Detect feature is designed to guard against process temperature readings caused by intermittent open sensor conditions (an

intermittent sensor condition is an open sensor condition that lasts less than

one update). By default, the transmitter is shipped with the Intermittent Sensor

Detect feature switched ON and the threshold value set at 2% of sensor limits. The Intermittent Sensor Detect feature can be switched ON or OFF and the

threshold value can be changed to any value between 0 and 100% of the sensor limits with a Field Communicator.

Transmitter Behavior with Intermittent Sensor Detect ON

When the Intermittent Sensor Detect feature is switched ON, the transmitter

can eliminate the output pulse caused by intermittent open sensor conditions. Process temperature changes (T) within the threshold value will be tracked normally by the transmitter’s output. A T greater than the threshold value will activate the intermittent sensor algorithm. True open sensor conditions will cause the transmitter to go into alarm.

The threshold value of the 644 should be set at a level that allows the normal range of process temperature fluctuations; too high and the algorithm will not be able to filter out intermittent conditions; too low and the algorithm will be activated unnecessarily. The default threshold value is 2% of the sensor limits.

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. (The transmitter in effect behaves as though the threshold value had been set at 100%.) The output delay due to the intermittent sensor algorithm will be eliminated.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Electronics tab. From the Measurement Filtering Box, configure the Intermit threshold.

Apply changes made (see “Apply AMS Changes” on page 3-6).

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Rosemount 644

Power Supply

Impedance

Handheld Terminal

Computer or DCS

644 HART

transmitter

4–20 mA

HART Interface

250 

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Open Sensor Holdoff

Fast Key Sequence 1, 3, 5, 3

HART

MULTIDROP COMMUNICATION

The Open Sensor Holdoff option, at the normal setting, enables the 644 to be

more robust under heavy EMI conditions. This is accomplished through the software by having the transmitter perform additional verification of the open sensor status prior to activating the transmitter alarm. If the additional verification shows that the open sensor condition is not valid, the transmitter will not go into alarm.

For users of the 644 that desire a more vigorous open sensor detection, the Open Sensor Holdoff option can be changed to a fast setting. With this setting, the transmitter will report an open sensor condition without additional verification of the open condition.

AMS

Right click on the device and select “Configuration Properties” from the menu. Select the Electronics tab. From the Measurement Filtering Box box, configure the Open Snsr Holdoff.

Apply changes made (see “Apply AMS Changes” on page 3-6).

Multidropping refers to the connection of several transmitters to a single

communications transmission line. Communication between the host and the transmitters takes place digitally with the analog output of the transmitters deactivated.

Many Rosemount transmitters can be multidropped. With the HART communications protocol, up to 15 transmitters can be connected on a single twisted pair of wires or over leased phone lines.

Figure 3-4. Typical Multidropped Network

A Field Communicator can test, configure, and format a multidropped 644 transmitter in the same way as in a standard point-to-point installation.

The application of a multidrop installation requires consideration of the update rate necessary from each transmitter, the combination of transmitter models, and the length of the transmission line. Each transmitter is identified by a unique address (1–15) and responds to the commands defined in the HART protocol.

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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

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. To activate multidrop communication, the transmitter address must be changed to a number between 1 and 15. This change deactivates the 4–20 mA analog output, sending it to 4 mA. The failure mode current also is disabled.

AMS

Right click and select “Configuration Properties” from the menu screen. Select the “HART” tab. From here, assign the polling address.

Rosemount 644

OPERATION AND MAINTENANCE

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.

HART

To understand calibration, it is necessary to understand that smart transmitters operate differently from analog transmitters. An important difference is that smart transmitters are factory-characterized, meaning that they are shipped with a standard sensor curve stored in the transmitter firmware. In operation, the transmitter uses this information to produce a process variable output, in engineering units, dependent on the sensor input.

Calibration of the 644 may include the following procedures:

• Sensor Input Trim: digitally alter the transmitter’s interpretation of the input signal

• Transmitter Sensor Matching: generates a special custom curve to match that specific sensor curve, as derived from the Callendar-Van Dusen constants

• Output Trim: calibrates the transmitter to a 4–20 mA reference scale

• Scaled Output Trim: calibrates the transmitter to a user-selectable reference scale.

Trim the Transmitter

One or more of the trim functions may be used when calibrating. The trim functions are as follows

• Sensor Input Trim

• Transmitter Sensor Matching

• Output Trim

• Output Scaled Trim

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Sensor Input Trim

Fast Key Sequence 1, 2, 2, 1, 1

HART

Perform a sensor trim if the transmitters digital value for the primary variable does not match the plant’s standard calibration equipment. The sensor trim function calibrates the sensor to the transmitter in temperature units or raw units. Unless your site-standard input source is NIST-traceable, the trim functions will not maintain the NIST-traceability of the system.

The Sensor Input Trim command allows the transmitter’s interpretation of

the input signal to be digitally altered (see Figure 3-5). The sensor reference command trims, in engineering (F, °C, °R, K) or raw (,mV) units, the combined sensor and transmitter system to a site standard using a known temperature source. Sensor trimming is suitable for validation procedures or for applications that require calibrating the sensor and transmitter together.

Use the following procedure to perform a sensor trim with a 644H.

1. Connect the calibration device or sensor to the transmitter. Refer to

Figure 2-9 on page 2-11 or inside of the transmitter terminal side cover for sensor wiring diagrams. (If using an active calibrator, please see “Active Calibrator” on page 3-14)

2. Connect the communicator to the transmitter loop.

3. From the Home screen, select 1Device Setup, 2 Diag/Service,

2 Calibration, 1 Sen so r 1 Trim, 1 Sensor 1 Input Trim to prepare to

trim the sensor.

4. Set the control loop to manual and select OK.

5. Select the appropriate sensor trim units at the ENTER SNSR 1 TRIM

UNITS prompt.

6. Select 1 Lower Only or 2 Lower and Upper at the SELECT SENSOR

TRIM POINTS prompt.

7. Adjust the calibration device to the desired trim value (must be within

the selected sensor limits). If a combined sensor and transmitter system are being trimmed, expose the sensor to a known temperature and allow the temperature reading to stabilize. Use a bath, furnace or isothermal block, measured with a site-standard thermometer, as the known temperature source.

8. Select OK once the temperature stabilizes. The communicator

displays the output value the transmitter associates with the input value provided by the calibration device.

9. Enter the lower or upper trim point, depending on the selection in

Step 6.

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AMS

For AMS, configure the sensor as indicated above.

Right click on the device and select “Calibrate” from the menu. Select “Sensor 1 Trim,” then “Sensor Input Trim.”

The wizard will continue through the process.

The transmitter may be restored to the factory default by selecting: “Calibration,” “Sensor 1 Trim,” “Revert to Factory Trim.”

Reference Manual

Standard IEC 751 “Ideal” Curve

(1)

Actual Curve

Temperature, °C

Resistance, Ohm

0 °C

(1) The Actual Curve is identified from the Callendar-Van Dusen equation.

TotalSystemAccuracy TransmitterAccuracy

SensorAccuracy

00809-0100-4728, Rev KA July 2010

Rosemount 644

The wizard will recall the factory trim for a given sensor

Apply changes made (see “AMS” on page 3-5).

Transmitter-Sensor Matching

Perform the Transmitter Sensor Matching procedure to enhance the

temperature measurement accuracy of the system (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 644 accepts Callendar-Van Dusen constants from a calibrated RTD schedule and generates the actual curve to match that specific sensor curve.

HART

System Accuracy Comparison at 150 °C Using a PT 100 (=0.00385)

Standard RTD Matched RTD 644H ±0.15 °C 644H ±0.15 °C Standard RTD ±1.05 °C Matched RTD ±0.18 °C Tot a l S y s te m

(1) Calculated using root-summed-squared (RSS) statistical method

(1)

Callendar-Van Dusen equation:

= Ro + Ro[t – (0.01t-1)(0.01t) – (0.01t – 1)(0.01t)3]

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:

RTD with a Span of 0 to 200 °C

±1.06 °C To ta l S y s t e m

(1)

±0.23 °C

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HART

Microprocessor

Digital-to-Analog

Signal Conversion

Analog-to-Digital

Signal Conversion

Transmitter Electronics Module

Analog

Input

Analog

Output

Field

Communicator

HART

Output

Sensor and Ohm/mV Trim adjust the signal here

Output and Scaled Output Trim adjust the signal here

Rosemount 644

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July 2010

1. From the HOME screen, select 1 Device Setup, 3 Configuration, 2

Sensor Config, 1 Chng T ype /Conn, 1 Sensor 1 or 2 Sensor 2. Set the control loop to manual and select OK.

2. Select Cal VanDusen at the ENTER SENSOR TYPE prompt.

3. Select the appropriate number of wires at the ENTER SENSOR

CONNECTION prompt.

4. Enter the R

tag attached to the special-order sensor when prompted.

5. Return the control loop to automatic control and select OK.

To disable the transmitter-sensor matching feature from the HOME screen select 1 Device Setup, 3 Configuration, 2 Sensor Config, 1 Chng Type/Conn, 1 Sensor 1 or 2 Sensor 2. Choose the appropriate sensor type from the ENTER SENSOR TYPE prompt.

NOTE

When the transmitter-sensor matching is disabled, the transmitter reverts to either user or factory trim, whichever was used previously. Make certain the transmitter engineering units default correctly before placing the transmitter into service.

, Alpha, Delta, and Beta values from the stainless steel

Figure 3-5. Dynamics of Smart Temperature Measurement

AMS

Right click on the device and select “Sensor Connections” from the menu. Select the “Sensor 1 Config.” Select “Sensor Connections.”

The wizard will go through the required changes.

NOTE

Under “Enter Sensor Type” select “Cal VanDusen.

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. The output trim function calibrates the transmitter to a 4–20 mA reference scale; the scaled output trim function calibrates to a user-selectable reference scale. To determine the need for an output trim or a scaled output trim, perform a loop test (see “Loop Test” on page 3-13).

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Rosemount 644

Output Trim

Fast Key Sequence 1, 2, 2, 2

The D/A Trim command allows the transmitter’s conversion of the input

signal to a 4–20 mA output to be altered (see Figure 3-5 on page 3-22). Adjust the analog output signal at regular intervals to maintain measurement precision. To perform a digital-to-analog trim, perform the following procedure:

1. From the HOME screen, select 1 Device setup, 2 Diag/Service,

2 Calibration, 2 D/A trim. Set the control loop to manual and select OK.

2. Connect an accurate reference meter to the transmitter at the

CONNECT REFERENCE METER prompt. To do so, shunt the power

to the transmitter through the reference meter at some point in the

loop. Select OK after connecting the reference meter.

3. Select OK at the SETTING FLD DEV OUTPUT TO 4 MA prompt. The

transmitter outputs 4.00 mA.

4. Record the actual value from the reference meter, and enter it at the

ENTER METER VALUE prompt. The communicator prompts the user

to verify whether or not the output value equals the value on the reference meter.

5. If the reference meter value equals the transmitter output value, then

select 1 Yes and go to step 6. If the reference meter value does not equal the transmitter output value, then select 2 No and go to step 4.

6. Select OK at the SETTING FLD DEV OUTPUT TO 20 MA prompt

and repeat steps 4 and 5 until the reference meter value equals the transmitter output value.

7. Return the control loop to automatic control and select OK.

HART

AMS

Right click on the device and select “Calibrate” from the menu. Select “D/A Trim.”

This wizard will go through the required changes.

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). To perform a scaled D/A trim, connect an accurate reference meter to the transmitter and trim the output signal to scale as outlined in the ”Output Trim” procedure.

AMS

Right click on the device and select “Calibrate” from the menu. Select “Scaled D/A Trim.”

This wizard will go through the required changes.

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HART

Rosemount 644

Hardware Maintenance

The 644H has no moving parts and requires minimal scheduled maintenance.

Sensor Checkout

To determine whether the sensor is at fault, replace it with another sensor or connect a test sensor locally at the transmitter to test remote sensor wiring. Select any standard, off-the-shelf sensor for use with a 644, or consult the factory for a replacement special sensor and transmitter combination.

Diagnostic Messages Hardware

If a malfunction is suspected despite the absence of diagnostics messages on the Field Communicator or AMS display, follow the procedures described in Table 3-2 to verify that transmitter hardware and process connections are in good working order. Under each of four major symptoms, specific suggestions are offered for solving the problem.

Table 3-2. 644H Troubleshooting Chart

Symptom Potential Source Corrective Action

Transmitter Does Not Communicate with Field Communicator

High Output Sensor Input

Erratic Output Loop Wiring

Loop Wiring

Failure or Connection

Loop Wiring

Power Supply

Electronics Module

• Check the revision level of the transmitter device descriptors (DDs) stored in the communicator. The communicator should report Dev v6, DD v1.

• Check for a minimum of 250 ohms resistance between the power supply and Field Communicator connection.

• Check for adequate voltage to the transmitter. If a Field Communicator is connected and 250 ohms resistance is in the loop, the transmitter requires a minimum of 12.0 V at the terminals to operate (over entire 3.75 to 23 mA operating range).

• Check for intermittent shorts, open circuits, and multiple grounds.

• Specify the transmitter by tag number. For certain non-standard transmitter installations, it may be necessary, because of excessive line length, to specify the transmitter tag number to initiate communications.

• Connect a Field Communicator and enter the transmitter test mode to isolate a sensor failure.

• Check for a sensor open or short circuit.

• Check the process variable to see if it is out of range.

• Check for dirty or defective terminals, interconnecting pins, or receptacles.

• Check the output voltage of the power supply at the transmitter terminals. It should be 12.0 to

42.4 VDC (over entire 3.75 to 23 mA operating range).

• Connect a Field Communicator and enter the transmitter status mode to isolate module failure.

• Connect a Field Communicator and check the sensor limits to ensure calibration adjustments are within the sensor range.

• Check for adequate voltage to the transmitter. It should be 12.0 to 42.4 VDC at the transmitter terminals (over entire 3.75 to 23 mA operating range).

• Check for intermittent shorts, open circuits, and multiple grounds.

• Connect a Field Communicator and enter the Loop test mode to generate signals of 4 mA, 20 mA, and user-selected values.

• Connect a Field Communicator and enter the transmitter test mode to isolate module failure.

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Symptom Potential Source Corrective Action

Low Output or No Output

Sensor Element

Loop Wiring

Electronics Module

• Connect a Field Communicator and enter the Transmitter test mode to isolate a sensor failure.

• Check the process variable to see if it is out of range.

• Check for adequate voltage to the transmitter. It should be 12.0 to 42.4 VDC (over entire 3.75 to 23 mA operating range).

• Check for shorts and multiple grounds.

• Check for proper polarity at the signal terminal.

• Check the loop impedance.

• Connect a Field Communicator and enter the Loop test mode.

• Check wire insulation to detect possible shorts to ground.

• Connect a Field Communicator and check the sensor limits to ensure calibration adjustments are within the sensor range.

• Connect a Field Communicator and enter the Transmitter test mode to isolate an electronics module failure.

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Field Communicator

Table 3-3 provides a guide to diagnostic messages used by the Field Communicator.

Variable parameters within the text of a message are indicated with the

notation <variable p ar ameter>. Reference to the name of another message is identified by the notation [another message].

Table 3-3. HART Diagnostics Messages

Message Description

Add item for ALL device types or only for this ONE device type Command Not Implemented The connected device does not support this function. Communication Error Either a device sends back a response indicating that the message it received was

Configuration memory not compatible with connected device Device Busy The connected device is busy performing another task.

Device Disconnected Device fails to respond to a command. Device write protected Device is in write-protect mode. Data can not be written. Device write protected. Do you still want to

shut off? Display value of variable on hotkey menu? Asks whether the value of the variable should be displayed adjacent to its label on the hotkey

Download data from configuration memory to device

Exceed field width Indicates that the field width for the current arithmetic variable exceeds the device- specified

Exceed precision Indicates that the precision for the current arithmetic variable exceeds the device- specified

Ignore next 50 occurrences of status? Asked after displaying device status. Softkey answer determines whether next 50 occurrences

Illegal character An invalid character for the variable type was entered. Illegal date The day portion of the date is invalid. Illegal month The month portion of the date is invalid. Illegal year The year portion of the date is invalid. Incomplete exponent The exponent of a scientific notation floating point variable is incomplete. Incomplete field The value entered is not complete for the variable type. Looking for a device Polling for multidropped devices at addresses 1–15. Mark as read only variable on hotkey menu? No device configuration in configuration memory No Device Found Poll of address zero fails to find a device, or poll of all addresses fails to find a device if

No hotkey menu available for this device. There is no menu named “hotkey” defined in the device description for this device. No offline devices available. There are no device descriptions available to be used to configure a device offline. No simulation devices available. There are no device descriptions available to simulate a device. No UPLOAD_VARIABLES in ddl for this device No Valid Items The selected menu or edit display contains no valid items. OFF KEY DISABLED Appears when the user attempts to turn the Field Communicator off before sending modified

Online device disconnected with unsent data. RETRY or OK to lose data.

Asks the user whether the hot key item being added should be added for all device types or only for the type of device that is connected.

unintelligible, or the Field Communicator cannot understand the response from the device. The configuration stored in memory is incompatible with the device to which a transfer has been requested.

Device is in write-protect mode. Press YES to turn the Field Communicator off and lose the unsent data.

menu if the item being added to the hotkey menu is a variable. Prompts user to press SEND softkey to initiate a memory to device transfer.

description edit format.

of device status will be ignored or displayed.

Asks whether the user should be allowed to edit the variable from the hotkey menu if the item being added to the hotkey menu is a variable. There is no configuration saved in memory available to re-configure off-line or transfer to a device.

auto-poll is enabled.

There is no menu named “upload_variables” defined in the device description for this device. This menu is required for offline configuration.

data or before completing a method. There is unsent data for a previously connected device. Press RETRY to send data, or press OK to disconnect and lose unsent data.

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Message Description

Out of memory for hotkey configuration. Delete unnecessary items. Overwrite existing configuration memory Requests permission to overwrite existing configuration either by a device-to-memory transfer

Press OK. Press the OK softkey. This message usually appears after an error message from the

Restore device value? The edited value that was sent to a device was not properly implemented. Restoring the device

Save data from device to configuration memory Saving data to configuration memory. Data is being transferred from a device to configuration memory.

Sending data to device. Data is being transferred from configuration memory to a device. There are write only variables which have not been edited. Please edit them. There is unsent data. Send it before shutting off? Too few data bytes received Command returns fewer data bytes than expected as determined by the device description. Transmitter Fault Device returns a command response indicating a fault with the connected device. Units for <variable label> has changed. Unit

must be sent before editing, or invalid data will be sent.

Unsent data to online device. SEND or LOSE data

Use up/down arrows to change contrast. Press DONE when done.

Value out of range The user-entered value is either not within the range for the given type and size of variable or

<message> occurred reading/writing <variable label>

<variable label> has an unknown value. Unit must be sent before editing, or invalid data will be sent.

There is no more memory available to store additional hotkey items. Unnecessary items should be deleted to make space available.

or by an offline configuration. User answers using the softkeys.

application or as a result of HART communications.

value returns the variable to its original value. Prompts user to press SAVE softkey to initiate a device-to-memory transfer.

There are write-only variables which have not been set by the user. These variables should be set or invalid values may be sent to the device. Press YES to send unsent data and turn the Field Communicator off. Press NO to turn the Field Communicator off and lose the unsent data.

The engineering units for this variable have been edited. Send engineering units to the device before editing this variable.

There is unsent data for a previously connected device which must be sent or thrown away before connecting to another device.

Gives direction to change the contrast of the Field Communicator display.

not within the min/max specified by the device. Either a read/write command indicates too few data bytes received, transmitter fault, invalid

response code, invalid response command, invalid reply data field, or failed pre- or post-read method; or a response code of any class other than SUCCESS is returned reading a particular variable. A variable related to this variable has been edited. Send related variable to the device before editing this variable.

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AMS Software

The following is a list of messages used by AMS software. These are communicated through pop-up menus.

Message Description

Command not implemented The connected device does not support this function. Communication error Either a device sends back a response indicating that the message it received was unintelligible, or

Device busy The connected device is busy performing another task. Device disappears from list Device fails to respond to a command. Device write protected Device is in write-protect mode. Data can not be written. Illegal character An invalid character for the variable type was entered. Illegal date The day portion of the date is invalid. Illegal month The month portion of the date is invalid. Illegal year The year portion of the date is invalid. Incomplete exponent The exponent of a scientific notation floating point variable

Incomplete field The value entered is not complete for the variable type. Sending data to device Data is being transferred from configuration memory to a device. There are write only variables which

have not been edited. Please edit them

There is unsent data. Send it before shutting off?

Too few data bytes received

Transmitter fault Device returns a command response indicating a fault with the connected device. Units for <variable label> has

changed. Unit must be sent before editing, or invalid data will be sent.

Unsent data to online device. SEND or LOSE data

Value out of range The user-entered value is either not within the range for the given type and size of variable or not

<message> occurred reading/writing <variable label>

<variable label> has an unknown value. Unit must be sent before editing, or invalid data will be sent.

the Field Communicator cannot understand the response from the device.

is incomplete.

There are write-only variables that have not been set by the user. These variables should be set or invalid values may be sent to the device.

Press YES to send unsent data and turn the Field Communicator off. Press NO to turn the Field Communicator off and lose the unsent data.

Command returns fewer data bytes than expected as determined by the device description.

The engineering units for this variable have been edited. Send engineering units to the device before editing this variable.

There is unsent data for a previously connected device which must be sent or thrown away before connecting to another device.

within the min/max specified by the device. Either a read/write command indicates too few data bytes received, transmitter fault, invalid response

code, invalid response command, invalid reply data field, or failed pre- or post-read method; or a response code of any class other than SUCCESS is returned reading a particular variable.

A variable related to this variable has been edited. Send related variable to the device before editing this variable.

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LCD Display

The LCD display displays abbreviated diagnostic messages for troubleshooting the transmitter. To determine the cause of a message, use a Field Communicator to further interrogate the transmitter. A description of each diagnostic message is identified in Table 3-4. The device sometimes requires additional interrogation to determine the source of the warning. Contact Emerson Process Management Customer Central at (800) 999-9307 for further information.

Table 3-4. LCD Display Diagnostics

ALARM Description

DEV FAIL The top line of the display scrolls through the following three messages:

• “BAD”

• “DEV”

•“FAIL” 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:

• “BAD”

• “SNSR”

•“FAIL” The bottom line display s the name of the sensor that has failed. This message indicates that the transmitter has detected an open or shorted sensor condition. The sensor may be disconnected, connected improperly, or malfunctioning. Check the sensor connections and sensor continuity.

UNCRN The top line of the display alternates between “UNCRN” and the sensor value. The bottom line will display the name of the

sensor for which this message applies. The uncertain message is displayed when the sensor reading is outside of the acceptable temperature range for the particular sensor type.

FIXED During a loop test or a a 4–20 mA output trim, the analog output defaults to a fixed value. The top line of the display

alternates between “FIXED” and the amount of current selected in milliamperes. The bottom line will hold on “AO mA.”

OFLOW The location of the decimal point, as configured in the meter setup, is not compatible wit the value to be displayed by the

meter. For example, if the meter is measuring a process temperature greater than 9.9999 degrees and the meter decimal point is set to 4-digit precision, the meter will display an “OFLOW” message because it is only capable of displaying a maximum of 9.9999 when set to 4-digit precision.

ALARM When a failure occurs and the meter is configured to display Primary Variable Percent of Range and/or Analog Output, the

top line o the meter will display “ALARM.” This indicates that the transmitter is in failure mode.

SAT When the transmitter output saturates and the meter is configured to display Primary Variable Percent of Range and/or

Analog Output, the top line of the meter will display “SAT.” This indicates that the transmitter output has reached saturation level.

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Section 4 FOUNDATION fieldbus

Configuration

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 4-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-1

General Block Information . . . . . . . . . . . . . . . . . . . . . . . . . page 4-2

OUNDATION fieldbus function blocks . . . . . . . . . . . . . . . .page 4-4

Operation and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . page 4-14

OVERVIEW This section provides information on configuring, troubleshooting, operating,

and maintaining the Rosemount 644 Temperature transmitter using

OUNDATION fieldbus protocol.

SAFETY MESSAGES Instructions and procedures in this section may require special precautions to

FOUNDATION fieldbus

Warnings

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

• Make sure only qualified personnel perform the installation.

Explosions could result in death or serious injury.

• Do not remove the connection head cover in explosive atmospheres when the circuit is live.

• Before powering a F make sure the instruments in the loop are installed in accordance with instrinsically 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 could result in death or serious injury.

• Do not remove the thermowell while in operation.

• Install and tighten thermowells and sensors before applying pressure

Electrical shock could cause death or serious injury.

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

OUNDATION fieldbus segment in an explosive atmosphere,

www.rosemount.com

FOUNDATION fieldbus

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GENERAL BLOCK INFORMATION

Device Description Before configuring the device, ensure the host has the appropriate Device

Description file revision for this device. The device descriptor can be found on www.rosemount.com. The initial release of the Rosemount 644 with

OUNDATION fieldbus protocol is device revision 1.

Node Address The transmitter is shipped at a temporary (248) address. This will enable

OUNDATION fieldbus host systems to automatically recognize the device and

F move it to a permanent address.

Modes The Resource, Transducer, and all function blocks in the device have modes

of operation. These modes govern the operation of the block. Every block supports both automatic (AUTO) and out of service (OOS) modes. Other modes may also be supported.

Changing Modes

To change the operating mode, set the MODE_BLK.TARGET to the desired mode. After a short delay, the parameter MODE_BLOCK.ACTUAL should reflect the mode change if the block is operating properly.

Permitted Modes

It is possible to prevent unauthorized changes to the operating mode of a block. To do this, configure MODE_BLOCK.PERMITTED to allow only the desired operating modes. It is recommended to always select OOS as one of the permitted modes.

Types of Modes

For the procedures described in this manual, it will be helpful to understand the following modes:

AUTO

The functions performed by the block will execute. If the block has any outputs, these will continue to update. This is typically the normal operating mode.

Out of Service (OOS)

The functions performed by the block will not execute. If the block has any outputs, these will typically not update and the status of any values passed to downstream blocks will be “BAD”. To make some changes to the configuration of the block, change the mode of the block to OOS. When the changes are complete, change the mode back to AUTO.

MAN

In this mode, variables that are passed out of the block can be manually set for testing or override purposes.

Other Types of Modes

Other types of modes are Cas, RCas, ROut, IMan and LO. Some of these may be supported by different function blocks in the 644. For more information, see the Function Block manual (document number 00809-0100-4783).

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Block

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Block

Analog Input

(AI Block)

Other

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NOTE

When an upstream block is set to OOS, this will impact the output status of all downstream blocks. The figure below depicts the hierarchy of blocks:

Link Active Scheduler The 644 can be designated to act as the backup Link Active Scheduler (LAS)

in the event that the designated LAS is disconnected from the segment. As the backup LAS, the 644 will take over the management of communications until the host is restored.

The host system may provide a configuration tool specifically designed to designate a particular device as a backup LAS. Otherwise, this can be configured manually as follows:

1. Access the Management Information Base (MIB) for the 644. To activate the LAS capability, write 0x02 to the BOOT_OPERAT_FUNCTIONAL_CLASS object (Index 605). To deactivate, write 0x01.

2. Restart the device.

FOUNDATION fieldbus

Block Installation Rosemount devices are pre-configured with function blocks at the factory, the

default permanent configuration for the 644 is listed below. The 644 can have up to ten additional instantiated function blocks.

• 2 Analog Input Blocks (tag names AI 1300, AI 1400)

• 1 Proportional/Integral/Derivative Block (tag name PID 1500)

The 644 supports the use of Function Block Instantiation. When a device supports block instantiation, the number of blocks and block types can be defined to match specific application needs.The number of blocks that can be instantiated is only limited by the amount of memory within the device and the block types that are supported by the device. Instantiation does not apply to standard device blocks like the Resource, Sensor Transducer, LCD Transducer, and Advanced Diagnostics Blocks.

By reading the parameter “FREE_SPACE” in the Resource block you can determine how many blocks you can instantiate. Each block that you instantiate takes up 4.5% of the “FREE_SPACE”.

Block instantiation is done by the host control system or configuration tool, but not all hosts are required to implement this functionality. Please refer to your specific host or configuration tool manual for more information.

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FOUNDATION fieldbus

Rosemount 644

Capabilities Virtual Communication Relationship (VCRs)

There are a total of 12 VCRs. One is permanent and 11 are fully configurable by the host system. Sixteen link objects are available.

Network Parameter Value

Slot Time 8 Maximum Response Delay 2 Maximum Inactivity to Claim LAS Delay 32 Minimum Inter DLPDU Delay 8 Time Sync class 4 (1ms) Maximum Scheduling Overhead 21 Per CLPDU PhL Overhead 4 Maximum Inter-channel Signal Skew 0 Required Number of Post-transmission-gab-ext Units 0 Required Number of Preamble-extension Units 1

Block Execution times

Analog Input = 45 ms PID = 60 ms

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FOUNDATION FIELDBUS FUNCTION BLOCKS

For reference information on the Resource, Sensor Transducer, AI, LCD Transducer blocks refer to F

OUNDATION fieldbus Block Information on

page A-1. Reference information on the PID block can be found in the Function Block manual document number 00809-0100-4783.

Resource Block (index number 1000)

The Resource Function Block (RB) contains diagnostic, hardware and electronics information. There are no linkable inputs or outputs to the Resource Block.

Sensor Transducer Block (index number 1100)

The Sensor Transducer Function Block (STB) temperature measurement data, including sensor and terminal temperature, The STB also includes information about sensor type, engineering units, linearization, reranging, damping, temperature compensation, and diagnostics.

LCD Transducer Block (index number 1200)

The LCD Transducer Block is used to configure the LCD meter.

Analog Input Block (index number 1300 and 1400)

The Analog Input Function Block (AI) processes the measurements from the sensor and makes them available to other function blocks. The output value from the AI block is in engineering units and contains a status indicating the quality of the measurement. The AI block is widely used for scaling functionality.

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PID Block (index number 1500)

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, feed forward control, override tracking, alarm limit detection, and signal status propagation.

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The block supports two forms of the PID equation: Standard and Series. You

can choose the appropriate equation using the MATHFORM parameter. The

Standard ISA PID equation is the default selection.

Resource Block FEATURES and FEATURES_SEL

The parameters FEATURES and FEATURE_SEL determine optional behavior of the 644.

FEATURES

The FEATURES parameter is read only and defines which features are supported by the 644. Below is a list of the FEATURES the 644 supports.

UNICODE

All configurable string variables in the 644, except tag names, are octet strings. Either ASCII or Unicode may be used. If the configuration device is generating Unicode octet strings, you must set the Unicode option bit.

REPORTS

The 644 supports alert reports. The Reports option bit must be set in the features bit string to use this feature. If it is not set, the host must poll for alerts.

Rosemount 644

FOUNDATION fieldbus

SOFT W LOCK

Inputs to the security and write lock functions include the software write lock bits of the FEATURE_SEL parameter, the WRITE_LOCK parameter, and the DEFINE_WRITE_LOCK parameter.

The WRITE_LOCK parameter prevents modification of parameters within the device except to clear the WRITE_LOCK parameter. During this time, the block will function normally updating inputs and outputs and executing algorithms. When the WRITE_LOCK condition is cleared, a WRITE_ALM alert is generated with a priority that corresponds to the WRITE_PRI parameter.

The FEATURE_SEL parameter enables the user to select the software write lock or no write lock capability. In order to enable the software write lock, the SOFT_W_LOCK bit must be set in the FEATURE_SEL parameter. Once this bit is set, the WRITE_LOCK parameter may be set to “Locked” or “Unlocked.” Once the WRITE_LOCK parameter is set to “Locked” by the software, all user requested writes as determined by the DEFINE_WRITE_LOCK parameter shall be rejected.

The DEFINE_WRITE_LOCK parameter allows the user to configure whether the write lock function will control writing to all blocks, or only to the resource and transducer blocks. Internally updated data such as process variables and diagnostics will not be restricted. N/A = No blocks are blocked Physical = Locks resource and transducer block Everything = Locks every block.

The following table displays all possible configurations of the WRITE_LOCK parameter.

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FOUNDATION fieldbus

FEATURE_SEL SW_SEL bit

0 (off) 1 (unlocked) Read only NA All 1 (on) 1 (unlocked) Read/Write NA All 1 (on) 2 (locked) Read/Write Physical Function

1 (on) 2 (locked) Read/Write Everything None

WRITE_LOCK

WRITE_LOCK Read/Write

DEFINE_WRITE_LOCK

Write access to blocks

Blocks only

FEATURES_SEL

FEATURES_SEL is used to turn on any of the supported features. The default setting of the 644 does not select any of these features. Choose one of the supported features if any.

MAX_NOTIFY

The MAX_NOTIFY parameter value is the maximum number of alert reports that the resource can have sent without getting a confirmation, corresponding to the amount of buffer space available for alert messages. The number can be set lower, to control alert flooding, by adjusting the LIM_NOTIFY parameter value. If LIM_NOTIFY is set to zero, then no alerts are reported.

™

PlantWeb

Alerts

The alerts and recommended actions should be used in conjunction with “Operation and Maintenance” on page 4-14.

The Resource Block will act as a coordinator for PlantWeb alerts. There will be three alarm parameters (FAILED_ALARM, MAINT_ALARM, and ADVISE_ALARM) which will contain information regarding some of the device errors which are detected by the transmitter software. There will be a RECOMMENDED_ACTION parameter which will be used to display the recommended action text for the highest priority alarm and a HEALTH_INDEX parameters (0 - 100) indicating the overall health of the transmitter. FAILED_ALARM will have the highest priority followed by MAINT_ALARM and ADVISE_ALARM will be the lowest priority.

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FAILED_ALARMS

A failure alarm indicates a failure within a device that will make the device or some part of the device non-operational. This implies that the device is in need of repair and must be fixed immediately. There are five parameters associated with FAILED_ALARMS specifically, they are described below.

FAILED_ENABLED

This parameter contains a list of failures in the device which makes the device non-operational that will cause an alert to be sent. Below is a list of the failures with the highest priority first.

1. Electronics

2. NV Memory

3. HW / SW Incompatible

4. Primary Value

5. Secondary Value

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.

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FAILED_PRI

Designates the alerting priority of the FAILED_ALM, see “Alarm Priority” on page 4-12. The default is 0 and the recommended value are between 8 and 15.

FAILED_ACTIVE

This parameter displays which of the alarms is active. Only the alarm with the highest priority will be displayed. This priority is not the same as the FAILED_PRI parameter described above. This priority is hard coded within the device and is not user configurable.

FAILED_ALM

Alarm indicating a failure within a device which makes the device non-operational.

MAINT_ALARMS

A maintenance alarm indicates the device or some part of the device needs maintenance soon. If the condition is ignored, the device will eventually fail. There are five parameters associated with MAINT_ALARMS, they are described below.

FOUNDATION fieldbus

MAINT_ENABLED

The MAINT_ENABLED parameter contains a list of conditions indicating the device or some part of the device needs maintenance soon.

Below is a list of the conditions with the highest priority first.

1. Primary Value Degraded

2. Secondary Value Degraded

3. Diagnostic

4. Configuration Error

5. Calibration Error

MAINT_MASK

The MAINT_MASK parameter will mask any of the failed conditions listed

in MAINT_ENABLED. A bit on means that the condition is masked out from alarming and will not be reported.

MAINT_PRI

MAINT_PRI designates the alarming priority of the MAINT_ALM, “Process

Alarms” on page 4-12. The default is 0 and the recommended values is 3 to 7.

MAINT_ACTIVE

The MAINT_ACTIVE parameter displays which of the alarms is active.

Only the condition with the highest priority will be displayed. This priority is not the same as the MAINT_PRI parameter described above. This priority is hard coded within the device and is not user configurable.

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.

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ADVISE_ENABLED

The ADVISE_ENABLED parameter contains a list of informative

conditions that do not have a direct impact on the device's primary functions. Below is a list of the advisories with the highest priority first.

1. NV Writes Deferred

2. SPM Process Anomaly detected

ADVISE_MASK

The ADVISE_MASK parameter will mask any of the failed conditions listed

in ADVISE_ENABLED. A bit on means the condition is masked out from alarming and will not be reported.

ADVISE_PRI

ADVISE_PRI designates the alarming priority of the ADVISE_ALM, see

“Process Alarms” on page 4-12. The default is 0 and the recommended values are 1 or 2.

ADVISE_ACTIVE

The ADVISE_ACTIVE parameter displays which of the advisories is

active. Only the advisory with the highest priority will be displayed. This priority is not the same as the ADVISE_PRI parameter described above. This priority is hard coded within the device and is not user configurable.

Table 4-1. RB.RECOMMENDED_ACTION

ADVISE_ALM

ADVISE_ALM is an alarm indicating advisory alarms. These conditions do not have a direct impact on the process or device integrity.

Recommended Actions for PlantWeb Alerts

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 alerts are active.

Failed/Maint/Advise

Alarm Type

None None No action required

Advisory

Maintenance

PlantWeb Alerts

Failed

Active Event

NV Writes Deferred Non-volatile writes have been deferred, leave

Configuration Error Re-write the Sensor Configuration Primary Value Degraded

Calibration Error Retrim the device Secondary Value Degraded Electronics Failure Replace the Device HW / SW Incompatible Verify the Hardware Revision is compatible with

NV Memory Failure Reset the device then download the Device

Primary Value Failure Verify the instrument process is within the

Secondary Value Failure

Recommended Action Text String

the device powered until the advisory goes away

Confirm the operating range of the applied sensor and/or verify the sensor connection and device environment

Verify the ambient temperature is within operating limits

the Software Revision

Configuration

Sensor range and / or confirm sensor configuration and wiring. Verify the ambient temperature is within operating limits

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Sensor Transducer Block NOTE

When the engineering units of the XD_SCALE are selected, the engineering units in the Transducer Block change to the same units. THIS IS THE ONLY WAY TO CHANGE THE ENGINEERING UNITS IN THE SENSOR TRANSDUCER BLOCK.

Damping

The damping parameter in the Transducer Block may be used to filter measurement noise. By increasing the damping time, the transmitter will have a slower response time, but will decrease the amount of process noise that is translated to the Transducer Block Primary Value. Because both the LCD and AI Block get input from the Transducer Block, adjusting the damping parameter will effect both blocks.

NOTE

The AI Block has it's own filtering parameter called PV_FTIME. For simplicity, it is better to do filtering in the Transducer Block as damping will be applied to primary value on every sensor update. If filtering is done in AI block, damping will be applied to output every macrocycle. The LCD will display value from Transducer block.

Rosemount 644

FOUNDATION fieldbus

Analog Input (AI) Function Block

Configure the AI block

A minimum of four parameters are required to configure the AI Block. The parameters are described below with example configurations shown at the end of this section.

CHANNEL

Select the channel that corresponds to the desired sensor measurement. The 644 measures both sensor temperature (channel 1) and terminal temperature (channel 2).

L_TYPE

The L_TYPE parameter defines the relationship of the sensor measurement (sensor temperature) to the desired output temperature of the AI Block. The relationship can be direct or indirect.

Direct

Select direct when the desired output will be the same as the sensor measurement (sensor temperature).

Indirect

Select indirect when the desired output is a calculated measurement based on the sensor measurement (e.g. ohm or mV). The relationship between the sensor measurement and the calculated measurement will be linear.

XD_SCALE and OUT_SCALE

The XD_SCALE and OUT_SCALE each include four parameters: 0%, 100%, engineering units, and precision (decimal point). Set these based on the L_TYPE:

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L_TYPE is Direct

When the desired output is the measured variable, set the XD_SCALE to represent the operating range of the process. Set OUT_SCALE to match XD_SCALE.

L_TYPE is Indirect

When an inferred measurement is made based on the sensor measurement, set the XD_SCALE to represent the operating range that the sensor will see in the process. Determine the inferred measurement values that correspond to the XD_SCALE 0 and 100% points and set these for the OUT_SCALE.

NOTE

To avoid configuration errors, only select Engineering Units for XD_SCALE and OUT_SCALE that are supported by the device. The supported units are:

Pressure (Channel 1) Temperature (Channel 2)

°C °C °F °F K K R R

 

mV mV

When the engineering units of the XD_SCALE are selected, this causes the engineering units of the PRIMARY_VALUE_RANGE in the Transducer Block to change to the same units. THIS IS THE ONLY WAY TO CHANGE THE ENGINEERING UNITS IN THE SENSOR TRANSDUCER BLOCK, PRIMARY_VALUE_RANGE parameter.

Configuration Examples

4-wire, Pt 100  = 385

AI1 = Process Temperature AI2 = Terminal Temperature

Transducer Block

If Host System Supports Methods:

1. Click on Methods

2. Choose Sensor Connections

3. Follow on-screen instruction.

If Host System Doesn’t Not Support Methods:

1. Put transducer block into OOS mode. a. Go to MODE_BLK.TARGET

b. Choose OOS (0x80)

2. Go to SENSOR_CONNECTION. a. Choose 4-wire (0x4)

3. Go to SENSOR_TYPE. a. Choose PT100A385

4. Put the transducer block back into Auto mode.

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AI Blocks (Basic Configuration)

AI1 as Process Temperature

1. Put the AI Block into OOS mode. a. Go to MODE_BLK.TARGET

b. Choose OOS (0x80)

2. Go to CHANNEL a. Choose Sensor 1

3. Go to L_TYPE a. Choose Direct

4. Go to XD_Scale a. Choose UNITS_INDEX to be °C

5. Go to OUT_SCALE a. Choose UNITS_INDEX to be °C

b. Set the 0 and 100 scale to be the same as the

PRIMARY_VALUE_RANGE

6. Put the AI Block back into Auto mode.

7. Follow Host Procedure Download Schedule into Block.

AI2 as Terminal Temperature

1. Put the AI Block into OOS mode. a. Go to MODE_BLK.TARGET

b. Choose OOS (0x80)

2. Go to CHANNEL a. Choose Body Temperature

3. Go to L_TYPE a. Choose Direct

4. Go to XD_Scale a. Choose UNITS_INDEX to be °C

5. Go to OUT_SCALE a. Choose UNITS_INDEX to be °C

b. Set the 0 and 100 scale to be the same as the

SECONDARY_VALUE_RANGE

6. Put the AI Block back into Auto mode.

7. Follow Host Procedure Download Schedule into Block.

(1)

FOUNDATION fieldbus

(1) Configure a minimum of four parameters to get a value out of the AI Block

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Filtering

The filtering feature changes the response time of the device to smooth variations in output readings caused by rapid changes in input. Adjust the filter time constant (in seconds) using the PV_FTIME parameter. Set the filter time constant to zero to disable the filter feature.

Process Alarms

Process Alarm detection is based on the OUT value. Configure the alarm limits of the following standard alarms:

• High (HI_LIM)

• High high (HI_HI_LIM)

• Low (LO_LIM)

• Low low (LO_LO_LIM)

In order to avoid alarm chattering when the variable is oscillating around the alarm limit, an alarm hysteresis in percent of the PV span can be set using the ALARM_HYS parameter. The priority of each alarm is set in the following parameters:

•HI_PRI

•HI_HI_PRI

•LO_PRI

•LO_LO_PRI

Alarm Priority

Alarms are grouped into five levels of priority:

Priority

Number

0 The alarm condition is not used. 1 An alarm condition with a priority of 1 is recognized by the system, but is not

2 An alarm condition with a priority of 2 is reported to the operator.

3-7 Alarm conditions of priority 3 to 7 are advisory alarms of increasing priority.

8-15 Alarm conditions of priority 8 to 15 are critical alarms of increasing priority.

Priority Description

reported to the operator.

Status Options

Status Options (STATUS_OPTS) supported by the AI block are shown below:

Propagate Fault Forward

If the status from the sensor is Bad, Device failure or Bad, Sensor failure, propagate it to OUT without generating an alarm. The use of these sub-status in OUT is determined by this option. Through this option, the user may determine whether alarming (sending of an alert) will be done by the block or propagated downstream for alarming.

Uncertain if Limited

Set the output status of the Analog Input block to uncertain if the measured or calculated value is limited.

BAD if Limited

Set the output status to Bad if the sensor is violating a high or low limit.

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Uncertain if Man Mode

Set the output status of the Analog Input block to uncertain if the actual mode of the block is Man.

NOTE

The instrument must be in Out of Service mode to set the status option.

Advanced Features

The AI Function Block provides added capability through the addition of the following parameters:

ALARM_TYPE

ALARM_TYPE allows one or more of the process alarm conditions detected by the AI function block to be used in setting its OUT_D parameter.

OUT_D

OUT_D is the discrete output of the AI function block based on the detection of process alarm condition(s). This parameter may be linked to other function blocks that require a discrete input based on the detected alarm condition.

FOUNDATION fieldbus

LCD T ransducer Block The LCD meter connects directly to the 644 electronics FOUNDATION fieldbus

output board. The meter indicates output and abbreviated diagnostic messages.

The first line of five characters displays the sensor being measured.

If the measurement is in error, “Error” appears on the first line. The second line indicates if the device or the sensor is causing the error.

Each parameter configured for display will appear on the LCD for a brief period before the next parameter is displayed. If the status of the parameter goes bad, the LCD will also cycle diagnostics following the displayed variable:

Custom Meter Configuration

Shipped from the factory, Parameter #1 is configured to display the Primary Variable (temperature) from the LCD Transducer Block. Parameters 2 – 4 are not configured. To change the configuration of Parameter #1 or to configure additional parameters 2 – 4, use the configuration parameters below.

The LCD Transducer Block can be configured to sequence four different process variables as long as the parameters are sourced from a function block that is scheduled to execute within the 644 temperature transmitter. If a function block is scheduled in the 644 that links a process variable from another device on the segment, that process variable can be displayed on the LCD.

DISPLAY_PARAM_SEL

The DISPLAY_PARAM_SEL parameter specifies how many process variables will be displayed. Select up to four display parameters.

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FOUNDATION fieldbus

BLK_TAG_#

(1)

Enter the Block Tag of the function block that contains the parameter to be displayed. The default function block tags from the factory are:

TRANSDUCER AI 1300 AI 1400 PID 1500

BLK_TYPE_#

(1)

Enter the Block Type of the function block that contains the parameter to be displayed. This parameter is generally selected via a drop-down menu with a list of possible function block types. (e.g. Transducer, PID, AI, etc.)

PARAM_INDEX_#

(1)

The PARAM_INDEX_# parameter is generally selected via a drop-down menu with a list of possible parameter names based upon what is available in the function block type selected. Choose the parameter to be displayed.

CUSTOM_TAG_#

(1)

The CUSTOM_TAG_# is an optional user-specified tag identifier that can be configured to be displayed with the parameter in place of the block tag. Enter a tag of up to five characters.

UNITS_TYPE_#

(1)

The UNITS_TYPE_# parameter is generally selected via a drop-down

menu with three options: AUTO, CUSTOM, or NONE. Select AUTO only when the parameter to be displayed is pressure, temperature, or percent. For other parameters, select CUSTOM and be sure to configure the CUSTOM_UNITS_# parameter. Select NONE if the parameter is to be displayed without associated units.

CUSTOM_UNITS_#

(1)

Specify custom units to be displayed with the parameter. Enter up to six characters. To display Custom Units the UNITS_TYPE_# must be set to CUSTOM.

OPERATION AND MAINTENANCE Overview

4-14

This section contains information on operation and maintenance procedures.

METHODS AND MANUAL OPERATION

Each F displaying and performing operations. Some hosts will use Device Descriptions (DD) and DD Methods to complete device configuration and will display data consistently across platforms. The DD can found on www.rosemount.com. There is no requirement that a host or configuration tool support these features.

The information in this section will describe how to use methods in a general fashion. In addition, if your host or configuration tool does not support methods this section will cover manually configuring the parameters involved with each method operation. For more detailed information on the use of methods, see your host or configuration tool manual.

(1) # represents the specified parameter number.

OUNDATION fieldbus host or configuration tool has different ways of

Reference Manual

Device does not

appear on segment.

Problem Identified?

Yes

Perform Recommended Action, see Table 4-2.

Check Segment, see “Device does not stay on segment” in Table4-2 for more information.

Problem Identified?

Yes

Perform Recommended Action, see page 2-6.

If the problem persists contact your local Rosemount representative.

PROBLEMS WITH COMMUNICATIONS

Device does not

stay on segment.

1. Check wiring to device.

2. Recycle power to device.

3. Electronic failure. Refer to “Device does not show up on segment” in Table 4-2 for more information.

00809-0100-4728, Rev KA July 2010

T roubleshooting Guides

Figure 4-1. 644 troubleshooting flowchart

Rosemount 644

FOUNDATION fieldbus

Table 4-2. Troubleshooting guide.

Symptom

Device does not show up on segment Unknown Recycle power to device

Device does not stay on segment

(1) The corrective actions should be done with consultation of your system integrator.

(2) Wiring and installation 31.25 kbit/s, voltage mode, wire medium application guide AG-140 available from the Fieldbus Fo undation.

(1)

Cause Recommended Actions

No power to device 1. Ensure the device is connected to the segment.

Segment problems Electronics failing 1. Replace device. Incompatible network settings Change host network parameters.

(2)

Incorrect signal levels. Refer to host documentation for procedure.

Excess noise on segment. Refer to host documentation for procedure.

Electronics failing 1. Replace device. Other 1. Check for water around the transmitter.

2. Check voltage at terminals. There should be 9–32Vdc.

3. Check to ensure the device is drawing current. There should be approximately 10.5 mA nominal (11 mA max.)

Refer to host documentation for procedure.

1. Check for two terminators.

2. Excess cable length.

3. Bad Power supply or conditioner

1. Check for incorrect grounding.

2. Check for correct shielded wire.

3. Tighten wire connections.

4. Check for corrosion or moisture on terminals.

5. Check for Bad power supply.

4-15

FOUNDATION fieldbus

COMMUNICATIONS ESTABLISHED BUT HAVE

“BLOCK_ERR” OR AN “ALARM” CONDITION.

See “PlantWeb™ Alerts” on page 4-6

Read the following parameters in the Resource Block to determine the recommended action.

BLOCK_ERR (see Table 4-8) SUMMARY_STATUS (see Table 4-9) DETAILED_STATUS (see Table 4-10)

Problem Identified?

Yes

Perform Recommended Action, see Table 4-10.

For more detailed information

Perform the following steps in the Sensor Transducer Block to determine the recommended action.

BLOCK_ERR (see Table 4-3) XD_ERR (see Table 4-4) DETAILED_STATUS (see Table 4-5) RECOMMENDED_ACTION (see Table 4-5) SENSOR_DETAILED STATUS (see Table 4-5)

If error condition does not exist in the Resource Block then it is a configuration problem, see “AI BLOCK_ERR Conditions.” in Table 4-6

Problem Identified?

Yes

If the problem persists contact your local Rosemount representative.

Problem Identified?

Perform Recommended Action, see Table 4-5.

Yes

Perform Recommended Action, see Table 4-7.

Yes

Perform Recommended Action, see Table 2-1.

Problem Identified?

Rosemount 644

Figure 4-2. Problems with communications flowchart

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Sensor Transducer Block Sensor Calibration, Lower and Upper Trim Methods

In order to calibrate the transmitter, run the Lower and Upper Trim Methods. If your system does not support methods, manually configure the Transducer Block parameters listed below.

1. Set MODE_BLK.TARGET to OOS

2. Set SENSOR_CAL_METHOD to User Trim

3. Set CAL_UNIT to supported engineering units in the Transducer Block

4. Apply temperature that corresponds to the lower calibration point and allow the temperature to stabilize. The temperature must be between the range limits defined in PRIMRY_VALUE_RANGE.

5. Set values of CAL_POINT_LO to correspond to the temperature applied by the sensor.

6. Apply temperature, temperature corresponding to the upper calibration

7. Allow temperature to stabilize.

8. Set CAL_POINT_HI

FOUNDATION fieldbus

NOTE

CAL_POINT_HI must be within PRIMARY_VALUE_RANGE and greater than CAL_POINT_LO + CAL_MIN_SPAN

9. Set SENSOR_CAL_DATE to the current date.

10. Set SENSOR_CAL_WHO to the person responsible for the calibration.

11. Set SENSOR _CAL_LOC to the calibration location.

12.

13. Set MODE_BLK.TARGET to AUTO

NOTE

If trim fails the transmitter will automatically revert to factory trim.

Excessive correction or sensor failure could cause device status to read “calibration error.” To clear this, trim the transmitter

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Recall Factory Trim

To recall a factory trim on the transmitter, run the Recall Factory Trim. If your system does not support methods, manually configure the Transducer Block parameters listed below.

1. Set MODE_BLK.TARGET to OOS

2. Set SENSOR_CAL_METHOD to Factory Trim.

3. Set SET_FACTORY_TRIM to Recall.

4. Set SENSOR_CAL_DATE to the current date.

5. Set SENSOR_CAL_WHO to the person responsible for the calibration.

6. Set SENSOR _CAL_LOC to the calibration location.

7. Set MODE_BLK.TARGET to AUTO.

NOTE

When sensor type is changed, the transmitter reverts to the factory trim. Changing sensor type causes you to loose any trim performed on the transmitter.

Table 4-3. Sensor Transducer Block BLOCK_ERR messages

Table 4-4. Sensor Transducer Block XD_ERR messages

Condition Name and Description

Other

Out of Service: The actual mode is out of service.

Condition Name and Description

Electronics Failure: An electrical component failed. I/O Failure: An I/O failure occurred. Software Error: The software has detected an internal error. Calibration Error: An error occurred during calibration of the device. Algorithm Error: The algorithm used in the transducer block produced an error due to

overflow, data reasonableness failure, etc.

Diagnostics

Table 4-5 lists the potential errors and the possible corrective actions for the given values. The corrective actions are in order of increasing system level compromises. The first step should always be to reset the transmitter and then if the error persists, try the steps in Table 4-5. Start with the first corrective action and then try the second.

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Table 4-5. Sensor Transducer Block STB.SENSOR_ DETAILED_ STATUS messages

STB.SENSOR_DETAILED_STATUS Description

Invalid Configuration Wrong sensor connection with wrong sensor

ASIC RCV Error The micro detected a chksum or start/stop bit

ASIC TX Error The A/D ASIC detected a communication error ASIC Interrupt Error ASIC interrupts are too fast or slow Reference Error Reference resistors are greater than 25% of

ASIC Configuration Error Citadel registers were not written correctly. (Also

Sensor Open Open sensor detected Sensor Shorted Shorted sensor detected Terminal Temperature Failure Open PRT detected Sensor Out of Operating Range Sensor readings have gone beyond

Sensor beyond operating limits Sensor readings have gone below 2% of lower

Terminal Temperature Out of Operating Range Terminal Temperature Beyond Operating Limits

Sensor Degraded For RTDs, this is excessive EMF detected. This

Sensor Error The user trim has failed due to excessive

type

failure with ASIC communication

known value

CALIBRATION_ERR)

PRIMRY_VALUE_RANGE values

range or above 6% of upper range of sensor. PRT readings have gone beyond SECONDARY_VALUE_RANGE values PRT readings have gone below 2% of lower range or above 6% of upper range of PRT. (These ranges are calculated and are not the actual range of the PRT which is a PT100 A385)

is thermocouple degradation for thermocouples.

correction or sensor failure during the trim method

FOUNDATION fieldbus

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FOUNDATION fieldbus

Analog Input (AI) Function Block

Status

Along with the measured or calculated PV value, every F block passes an additional parameter called STATUS. The PV and STATUS are passed from the Transducer Block to the Analog Input Block. The STATUS can be one of the following: GOOD, BAD, or UNCERTAIN. When there are no problems detected by the self-diagnostics of the block, the STATUS will be GOOD. If a problem occurs with the hardware in the device, or, the quality of the process variable is compromised for some reason, the STATUS will become either BAD or UNCERTAIN depending upon the nature of the problem. It is important that the Control Strategy that makes use of the Analog Input Block is configured to monitor the STATUS and take action where appropriate when the STATUS is no longer GOOD.

Simulation

Simulate replaces the channel value coming from the Sensor Transducer Block. For testing purposes, it is possible to manually drive the output of the Analog Input Block to a desired value. There are two ways to do this.

Manual Mode

To change only the OUT_VALUE and not the OUT_STATUS of the AI Block, place the TARGET MODE of the block to MANUAL. Then, change the OUT_VALUE to the desired value.

Simulate

1. If the SIMULATE switch is in the OFF position, move it to the ON position. If the SIMULATE jumper is already in the ON position, you must move it to off and place it back in the ON position.

OUNDATION fieldbus

NOTE

As a safety measure, the switch must be reset every time power is interrupted to the device in order to enable SIMULATE. This prevents a device that is tested on the bench from getting installed in the process with SIMULATE still active.

2. To change both the OUT_VALUE and OUT_STATUS of the AI Block, set the TARGET MODE to AUTO.

3. Set SIMULATE_ENABLE_DISABLE to ‘Active’.

4. Enter the desired SIMULATE_VALUE to change the OUT_VALUE and SIMULATE_STATUS_QUALITY to change the OUT_STATUS. If errors occur when performing the above steps, be sure that the SIMULATE jumper has been reset after powering up the device.

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Table 4-6. AI BLOCK_ERR Conditions.

Condition

Number

0 Other 1 Block Config uratio n Error: the selected channel carries a measurement that

3 Simulate Active: Simulation is enabled and the block is using a simulated

7 Input Failure/Process Variable has Bad Status: The hardware is bad, or a

14 Power Up 15 Out of Service: The actual mode is out of service.

Table 4-7. Troubleshooting the AI block

Symptom Possible Causes Recommended Action s

BLOCK_ERR reads OUT OF SERVICE (OOS)

BLOCK_ERR reads CONFIGURATION ERROR

Bad or no temperature readings (Read the AI “BLOCK_ERR” parameter)

OUT parameter status reads UNCERTAIN and substatus reads EngUnitRangViolation.

BLOCK_ERR reads POWERUP Download Schedule into block. Refer to host for downloading

BLOCK_ERR reads BAD INPUT 1. Sensor Transducer Block Out Of Service (OOS)

No BLOCK_ERR but readings are not correct. If using Indirect mode, scaling could be wrong.

No BLOCK_ERR. Sensor needs to be calibrated or Zero trimmed.

Out_ScaleEU_0 and EU_100 settings are incorrect.

Condition Name and Description

is incompatible with the engineering units selected in XD_SCALE, the L_TYPE parameter is not configured, or CHANNEL = zero.

value in its execution.

bad status is being simulated.

1. AI Block target mode target mode set to OOS.

2. Resource Block OUT OF SERVICE.

1. Check CHANNEL parameter (see “CHANNEL” on page 2-9)

2. Check L_TYPE parameter (see “L_TYPE” on page 2-9)

3. Check XD_SCALE engineering units. (see “XD_SCALE and OUT_SCALE” on page 2-10

procedure.

2. Resource Block Out of Service (OOS)

1. Check XD_SCALE parameter.

2. Check OUT_SCALE parameter. (see “XD_SCALE and OUT_SCALE” on page 2-10)

See Section 3: Operation and Maintenance to determine the appropriate trimming or calibration procedure.

See “XD_SCALE and OUT_SCALE” on page 2-10.

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FOUNDATION fieldbus

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Resource Block This section describes error conditions found in the Resource block. Read

Table 4-8 through Table 4-10 to determine the appropriate corrective action.

FOUNDATION fieldbus

Table 4-8. Resource Block BLOCK_ERR messages

Table 4-9. Resource Block SUMMARY_STATUS messages

Table 4-10. Resource Block RB.DETAILED_STATUS

Block Errors

Table 4-8 lists conditions reported in the BLOCK_ERR parameter.

Condition Name and Description

Other Device Needs Maintenance Now Memory Failure: A memory failure has occurred in FLASH, RAM, or EEPROM memory Lost NV Data: Non-volatile data that is stored in non-volatile memory has been lost.

Device Needs Maintenance Now

Out of Service: The actual mode is out of service.

Condition Name

No repair needed Repairable Call Service Center

RB.DETAILED_STATUS Description

Sensor Transducer block error. Active when any SENSOR_DETAILED_STAUS bit is on Manufacturing Block integrity error The manufacturing block size, revision, or checksum is

wrong

Hardware/software incompatible Verify the manufacturing block revision and the

hardware revision are correct/compatible with the

software revision. Non-volatile memory integrity error Invalid checksum on a block of NV data ROM integrity error Invalid application code checksum Lost deferred NV data Device has been power-cycled while non-volatile writes

were being deferred to prevent premature memory

failure, the write operations have been deferred. NV Writes Deferred A high number of writes has been detected to

non-volatile memory. To prevent premature failure, the

write operations have been deferred.

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LCD Transducer block This section describes error conditions found in the LCD Transducer Block.

Read Table 4-11 and to determine the appropriate corrective action.

Self Test Procedure for the LCD

The SELF_TEST parameter in the Resource block will test LCD segments. When running, the segments of the display should light up for about five seconds.

If your host system supports methods refer to your host documentation on how to run the “Self Test” method. If your host system does not support methods than you can run this test manually be following the steps below.

1. Put Resource block into “OOS” (Out of Service).

2. Go to the parameter called “SELF_TEST” and write the value Self test (0x2).

3. Observe the LCD screen when you are doing this. All of the segments should light up.

4. Put the Resource block back into “AUTO”.

Table 4-11. LCD Transducer Block BLOCK_ERR messages

Condition Name and Description

Other

Out of Service: The actual mode is out of service.

FOUNDATION fieldbus

Symptom Possible Causes Recommended Action

The LCD displays “DSPLY#INVLID.” Read the BLOCK_ERR and if it says “BLOCK CONFIGURATION” perform the Recommended Action

The Bar Graph and the AI.OUT readings do not match. The OUT_SCALE of the AI block is not

“644” is being displayed or not all of the values are being displayed.

The display reads OOS The resource and or the LCD Transducer

The display is hard to read. Some of the LCD segments may have

One or more of the display parameters are not configured properly.

configured properly.

The LCD block parameter “DISPLAY_PARAMETER_SELECT is not properly configured.

block are OOS.

gone bad. Device is out o the temperature limit for the

LCD. (-20 to 80 °C)

See “LCD Transducer Block” on page 2-16.

See “Analog Input (AI) Function Block” on page 2-9 and “Display bar graph” on page 2-18.

See “LCD Transducer Block” on page 2-16.

Verify that both blocks are in “AUTO,”

See XXXX (Self Test). If some of the segment is bad, replace the LCD.

Check ambient temperature of the device.

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Appendix A Specifications and

Reference Data

HART and Foundation Fieldbus Specifications . . . . . . . .page A-1

Foundation Fieldbus Specifications . . . . . . . . . . . . . . . . .page A-4

4–20 mA / HART Specifications . . . . . . . . . . . . . . . . . . . . . page A-6

Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-10

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-12

Stainless Steel Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-18

HART AND FOUNDATION FIELDBUS SPECIFICATIONS

Functional Inputs

User-selectable; sensor terminals rated to 42.4 VDC. See “Accuracy” on page A-8 for sensor options.

Rosemount 644

Output

Single 2-wired device with either 4–20 mA/HART, linear with temperature or input; or a completely digital output with F (ITK 4.5 compliant).

Isolation

Input/output isolation tested to 500 V DC/AC rms (707 V DA) at 50/60 Hz

Local Display

The optional five-digit integral LCD Display includes a floating or fixed decimal point. It can also display engineering units (°F, °C, °R, K, , and millivolts), milliampere, and percent of span. The display can be configured to alternate between selected display options. Display settings are preconfigured at the factory according to the standard transmitter configuration. They can be reconfigured in the field using either HART or F communications.

Humidity Limits

0–99% relative humidity

Update Time

 0.5 seconds

OUNDATION fieldbus communication

OUNDATION fieldbus

www.rosemount.com

Rosemount 644

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)

Field Communicator Connections

Communication Terminals

644H Clips permanently fixed to terminal block 644R Clips permanently fixed to front panel

Materials of Construction

Electronics Housing and Terminal Block

644H Noryl 644R Lexan

Enclosure (Option code J5 or J6)

Housing Low-copper aluminum Paint Polyurethane Cover O-ring Buna-N

glass reinforced

polycarbonate

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Mounting

The 644R attaches directly to a wall or a DIN rail. The 644H installs in a connection head or universal head mounted directly on a sensor assembly, apart from a sensor assembly using a universal head, or to a DIN rail using an optional mounting clip.

Weight

Code Options Weight

644H HART, Head Mount Transmitter 96 g (3.39 oz) 644H FOUNDATION fieldbus,

Head Mount Transmitter 644R HART, Rail Mount Transmitter 174 g (6.14 oz) M5 LCD Display 38 g (1.34 oz) J5, J6 Universal Head, Standard Cover 577 g (20.35 oz) J5, J6 Universal Head, Meter Cover 667 g (23.53 oz)

92 g (3.25 oz)

Enclosure Ratings (644H)

All option codes (S1, S2, S3, S4, J5 and J6) are NEMA 4X, IP66, and IP68. Option code J6 is CSA Enclosure Type 4X.

A-2

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2-wire

RTD and 

3-wire RTD

and 

4-wire RTD

and 

T/C

and mV

1234

12 34

1234

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Rosemount 644

Performance EMC (ElectroMagnetic Compatibility) NAMUR NE 21 Standard

The 644H HART meets the requirements for NAMUR NE 21 Rating. (Hardware Rev 26 and later for HART devices.)

Susceptibility Parameter

ESD

Radiated

Burst

Surge

Conducted

• 6 kV contact discharge

• 8 kV air discharge

• 80 – 1000 MHz at 10 V/m AM

• 1 kV for I.O.

• 0.5 kV line–line

• 1 kV line–ground (I.O. tool)

• 150 kHz to 80 MHz at 10 V

Influence

HART None

< 0.5%

None

< 0.5%

CE Mark

The 644 meets all requirements listed under IEC 61326: Amendment 1, 1998.

Power Supply Effect

Less than ±0.005% of span per volt

Stability

RTDs and thermocouples have a stability of ±0.15% of output reading or 0.15 °C (whichever is greater) for 24 months

Self Calibration

The analog-to-digital measurement circuitry automatically self-calibrates for each temperature update by comparing the dynamic measurement to extremely stable and accurate internal reference elements.

Vibration Effect

The 644 is tested to the following specifications with no effect on performance:

Frequency Vibration

10 to 60 Hz 0.21 mm displacement 60 to 500 Hz 3 g peak acceleration

Sensor Connections

644244EH Sensor Connections Diagram

* Rosemount Inc. provides 4-wire sensors for all single element RTDs. You can use these RTDsin 3-wire

configurations by leaving the unneeded leads disconnected and insulated withelectrical t ape.

A-3

Rosemount 644

Lower Specification Limit

Upper

Specification

Limit

Typical Accuracy

3144-GRAPH

–3 –2 –1 1 2 3

Rosemount Conformance to Specifications

A Rosemount product not only meets its published specifications, but most likely exceeds them. Advanced manufacturing techniques and the use of Statistical Process Control provide specification conformance to at least ± 3 ensures that product design, reliability, and performance will improve annually.

For example, the Reference Accuracy distribution for the 644 is shown to the right. Our Specification Limits are ± 0.15 °C, but, as the shaded area shows, approximately 68% of the units perform three times better than the limits. Therefore, it is very likely that you will receive a device that performs much better than our published specifications.

(1)

. Our commitment to continual improvement

Reference Manual

00809-0100-4728, Rev KA

July 2010

Conversely, a vendor who “grades” product without using Process Control, or who is not committed to ± 3 performance, will ship a higher percentage of units that are barely within advertised specification limits.

(1) Sigma () is a statistical symbol to designate the standard deviation from the mean value of a normal distribution.

FOUNDATION FIELDBUS SPECIFICATIONS

Function Blocks

Resource Block

Accuracy distribution shown is for the 644, Pt 100 RTD sensor, Range 0 to 100 °C

• The resource block contains physical transmitter information including available memory, manufacture identification, device type, software tag, and unique identification.

Transducer Block

• The transducer block contains the actual temperature measurement data, including sensor 1 and terminal temperature. It includes information about sensor type and configuration, engineering units, linearization, reranging, damping, temperature correction, and diagnostics.

LCD Block

• The LCD block is used to configure the local display, if a LCD Display is being used.

Analog Input (AI)

• Processes the measurement and makes it available on the fieldbus segment

• Allows filtering, alarming, and engineering unit changes.

PID Block

• The transmitter provides control functionality with one PID function block in the transmitter. The PID block can be used to perform single loop, cascade, or feedforward control in the field.

Instantiable Function Blocks

• All the function blocks used by the transmitter are instantiable, meaning the total number of function blocks is only limited by the physical memory available in the transmitter. Since only the instantiable blocks can use physical memory, any combination of function blocks can be used at any given time as long as the physical memory size is not violated.

A-4

Block Execution Time (milliseconds)

Resource – Transducer – LCD Block – Analog Input 1 45 Analog Input 2 45 PID 1 60

Reference Manual

00809-0100-4728, Rev KA July 2010

Rosemount 644

Turn-on Time

Performance within specifications in less than 20 seconds after power is applied, when damping value is set to 0 seconds.

Status

If self-diagnostics detect a sensor burnout or a transmitter failure, the status of the measurement will be updated accordingly. Status may also send the PID output to a safe value.

Power Supply

Powered over F The transmitter operates between 9.0 and 32.0 VDC, 11 mA maximum. The power terminals are rated to 42.4 VDC max.

Alarms

The AI function block allows the user to configure the alarms to HI-HI, HI, LO, or LO-LO with a variety of priority levels and hysteresis settings.

Backup Link Active Scheduler (LAS)

The transmitter is classified as a device link master, which means it can function as a Link Active Scheduler (LAS) if the current link master device fails or is removed from the segment.

The host or other configuration tool is used to download the schedule for the application to the link master device. In the absence of a primary link master, the transmitter will claim the LAS and provide permanent control for the H1 segment.

OUNDATION fieldbus with standard fieldbus power supplies.

OUNDATION fieldbus Parameters

Schedule Entries 25 Links 16 Virtual Communications Relationships (VCR) 12

(1) Minimum quantity.

(1)

Software Upgrade in the Field

Software for the 644 with F

OUNDATION fieldbus will be easy to upgrade in the

field. Users will be able to take advantage of software enhancements by loading new application software into the device memory.

A-5

Rosemount 644

4–20 mA dc

1322

1100

1000

750

500

250

10 12.0 20 30 40 42.4

Load (Ohms)

Supply Voltage (VDC)

Operating

Region

Reference Manual

00809-0100-4728, Rev KA

July 2010

4–20 mA / HART SPECIFICATIONS

Communication Requirements

Transmitter power terminals are rated to 42.4 V DC. A Field Communicator requires a loop resistance between 250 – 1100 ohms. The 644 HART device does not communicate when power is below 12 V DC at the transmitter terminals.

Power Supply

An external power supply is required for HART devices. The transmitter operates on 12.0 to 42.4 VDC transmitter terminal voltage with load resistance between 250 and 660 ohms. A minimum of 17.75 VDC power supply is required with a load of 250 ohms. Transmitter power terminals are rated to 42.4 V DC.

Maximum Load = 40.8 x (Supply Voltage – 12.0)

A-6

Temperature Limits

Operating Limit Storage Limit

With LCD Display –4 to 185 °F

Without LCD Display –40 to 185 °F

–20 to 85 °C

–40 to 85 °C

–50 to 185 °F –45 to 85 °C

–58 to 248 °F –50 to 120 °C

Reference Manual

00809-0100-4728, Rev KA July 2010

Rosemount 644

Hardware and Software Failure Mode

The 644 features software driven alarm diagnostics. The independent circuit is designed to provide backup alarm output if the microprocessor software fails. The alarm directions (HIGH/LO) are user-selectable using the failure mode switch. If failure occurs, the position of the switch determines the direction in which the output is driven (HI or LO). The switch feeds into the digital-to-analog (D/A) converter, which drives the proper alarm output even if the microprocessor fails. The values at which the transmitter drives its output in failure mode depends on whether it is configured to standard, custom, or NAMUR-compliant (NAMUR recommendation NE 43, June 1997) operation. Table 1 shows the alarm ranges available for the device to be configured to.

TABLE 1. Available Alarm Range

Standard NAMUR- NE 43 Compliant

Linear Output: 3.9  I Fail High: 21  I  23 21  I  23 Fail Low: 3.5  I  3.75 3.5  I  3.6

(1) Measured in milliamperes. (2) I = Process Variable (current output).

(1)

(2)

 20.5

3.8  I  20.5

Custom Alarm and Saturation Level

Custom factory configuration of alarm and saturation level is available with option code C1 for valid values. These values can also be configured in the field using a Field Communicator.

Turn-on Time

Performance within specifications in less than 5.0 seconds after power is applied, when damping value is set to 0 seconds.

Transient Protection

The Rosemount 470 prevents damage from transients induced by lightning, welding, or heavy electrical equipment. For more information, refer to the 470 Product Data Sheet (document number 00813-0100-4191).

A-7

Reference Manual

00809-0100-4728, Rev KA

Rosemount 644

Accuracy

TABLE 2. Rosemount 644 Input Options and Accuracy.

Sensor

Options

2-, 3-, 4-wire RTDs °C °F °C °F °C °F Pt 100 IEC 751, 1995 ( = 0.00385) –200 to 850 –328 to 1562 10 18 ± 0.15 ± 0.27 ±0.03% of span Pt 100 JIS 1604, 1981 ( = 0.003916) –200 to 645 –328 to 1193 10 18 ± 0.15 ± 0.27 ±0.03% of span Pt 200 IEC 751, 1995 ( = 0.00385) –200 to 850 –328 to 1562 10 18 ± 0.27 ± 0.49 ±0.03% of span Pt 500 IEC 751, 1995 ( = 0.00385) –200 to 850 –328 to 1562 10 18 ± 0.19 ± 0.34 ±0.03% of span Pt 1000 IEC 751, 1995 ( = 0.00385) –200 to 300 –328 to 572 10 18 ± 0.19 ± 0.34 ±0.03% of span Ni 120 Edison Curve No. 7 –70 to 300 –94 to 572 10 18 ± 0.15 ± 0.27 ±0.03% of span Cu 10 Edison Copper Winding No. 15 –50 to 250 –58 to 482 10 18 ±1.40 ± 2.52 ±0.03% of span Thermocouples

(5)

Type B Type E NIST Monograph 175, IEC 584 –50 to 1000 –58 to 1832 25 45 ± 0.20 ± 0.36 ±0.03% of span Type J NIST Monograph 175, IEC 584 –180 to 760 –292 to 1400 25 45 ± 0.35 ± 0.63 ±0.03% of span

(6)

Type K Type N NIST Monograph 175, IEC 584 –200 to 1300 –328 to 2372 25 45 ± 0.50 ± 0.90 ±0.03% of span Type R NIST Monograph 175, IEC 584 0 to 1768 32 to 3214 25 45 ± 0.75 ± 1.35 ±0.03% of span Type S NIST Monograph 175, IEC 584 0 to 1768 32 to 3214 25 45 ± 0.70 ± 1.26 ±0.03% of span Type T NIST Monograph 175, IEC 584 –200 to 400 –328 to 752 25 45 ± 0.35 ± 0.63 ±0.03% of span DIN Type L DIN 43710 –200 to 900 –328 to 1652 25 45 ± 0.35 ± 0.63 ±0.03% of span DIN Type U DIN 43710 –200 to 600 –328 to 1112 25 45 ± 0.35 ± 0.63 ±0.03% of span Type

W5Re/W26Re Millivolt Input –10 to 100 mV 3 mV ±0.015 mV ±0.03% of span 2-, 3-, 4-wire Ohm Input 0 to 2000 ohms 20 ohm ±0.45 ohm ±0.03% of span

(1) No minimum or maximum span restrictions within the input ranges. Recommended minimum span will hold noise within accuracy specification with damp ing

at zero seconds.

(2) The published digital accuracy applies over the entire sensor input range. Digital output can be accessed by HART or Foundation fieldbu s Communications

or Rosemount control system. (3) Total Analog accuracy is the sum of digital and D/A accuracies. (4) Total digital accuracy for thermocouple measurement: sum of digital accuracy +0.5 °C. (5) Digital accuracy for NIST T ype B T/C is ±3.0 °C (±5.4 °F) from 100 to 300 °C (212 to 572 °F). (6) Digital accuracy for NIST T ype K T/C is ±0.70 °C (±1.26 °F) from –180 to –90 °C (–292 to –130 °F).

(4)

NIST Monograph 175, IEC 584 100 to 1820 212 to 3308 25 45 ± 0.77 ± 1.39 ±0.03% of span

NIST Monograph 175, IEC 584 –180 to 1372 –292 to 2502 25 45 ± 0.50 ± 0.90 ±0.03% of span

Sensor

Reference

ASTM E 988-96 0 to 2000 32 to 3632 25 45 ± 0.70 ± 1.26 ±0.03% of span

Input

Ranges

Recommended

Min. Span

(1)

Digital

Accuracy

(2)

July 2010

D/A

Accuracy

(3)

Accuracy Example (HART devices)

When using a Pt 100 ( = 0.00385) sensor input with a 0 to 100 °C span:

• Digital accuracy = ±0.15 °C

• D/A accuracy = ±0.03% of 100 °C or ±0.03 °C

• Total accuracy = ±0.18 °C.

Accuracy Example (F

OUNDATION fieldbus devices)

When using a Pt 100 ( = 0.00385) sensor input:

• Total accuracy = ±0.15 °C.

• No D/A accuracy effects apply

A-8

Reference Manual

0.1520.0320.0320.01

+++ 0.16C=

0.1520.03

+ 0.153 C=

00809-0100-4728, Rev KA July 2010

Ambient Temperature Effect

TABLE 3. Ambient Temperature Effect

Temperature Effect s per 1.0 °C (1.8 °F) Change

Sensor Options

2-, 3-, 4-wire RTDs Pt 100 (( = 0.00385) 0.003 °C (0.0054 °F) Entire Sensor Input Range 0.001% of span Pt 100 ( = 0.003916) 0.003 °C (0.0054 °F) Entire Sensor Input Range 0.001% of span Pt 200 0.004 °C (0.0072 °F) Entire Sensor Input Range 0.001% of span Pt 500 0.003 °C (0.0054 °F) Entire Sensor Input Range 0.001% of span Pt 1000 0.003 °C (0.0054 °F) Entire Sensor Input Range 0.001% of span Ni 120 0.003 °C (0.0054 °F) Entire Sensor Input Range 0.001% of span Cu 10 0.03 °C (0.054 °F) Entire Sensor Input Range 0.001% of span Thermocouples Type B 0.014 °C R 1000°C 0.001% of span

Type E 0.005 °C +(0.00043% of R) All 0.001% of span Type J 0.0054 °C +(0.0029%of R) R 0 °C 0.001% of span

Type K 0.0061 °C +(0.00054% of R) R 0 °C 0.001% of span

Type N 0.0068 °C +(0.00036% of R) All 0.001% of span Type R, S, W5Re/W26Re 0.016 °C R 200°C 0.001% of span

Type T 0.0064 °C R 0 °C 0.001% of span

DIN Type L 0.0054 °C + (0.00029% of R) R 0 °C 0.001% of span

DIN Type U 0.0064 °C R 0 °C 0.001% of span

Millivolt Input 0.0005 mV Entire Sensor Input Range 0.001% of span 2-, 3-, 4-wire Ohm 0.0084  Entire Sensor Input Range 0.001% of span

(1) Change in ambient is with reference to the calibration temperature of the transmitter 68 °F (20 °C) from factory.

in Ambient Temperature

0.032 °C – (0.0025% of (R – 300)) 300 °C  R < 1000 °C 0.001% of span

0.054 °C – (0.011% of (R – 100)) 100 °C  R< 300 °C 0.001% of span

0.0054 °C + (0.0025% of absolute value R) R < 0 °C 0.001% of span

0.0061 °C + (0.0025% of absolute value R) R < 0 °C 0.001% of span

0.023 °C – (0.0036% of R) R < 200 °C 0.001% of span

0.0064 °C +(0.0043% of absolute value R) R < 0 °C 0.001% of span

0.0054 °C +(0.0025% of absolute value R) R < 0 °C 0.001% of span

0.0064 °C +(0.0043% of absolute value R) R < 0 °C 0.001% of span

(1)

Range D/A Effect

Transmitters can be installed in locations where the ambient temperature is between –40 and 85 °C (–40 and 185 °F). In order to maintain excellent accuracy performance, each transmitter is individually characterized over this ambient temperature range at the factory.

Rosemount 644

Temperature Effects Example (HART devices)

When using a Pt 100 ( = 0.00385) sensor input with a 0–100 °C span at 30 °C ambient temperature:

• Digital Temperature Effects: 0.003 °C x (30 - 20) = 0.03 °C

• D/A Effects: [0.001% of 100] x (30 - 20) = 0.01 °C

• Worst Case Error: Digital + D/A + Digital Temperature Effects + D/A Effects = 0.15 °C + 0.03 °C + 0.03 °C + 0.01

°C = 0.22 °C

• Total Probable Error:

Temperature Effects Examples (F

When using a Pt 100 ( = 0.00385) sensor input at 30 °C span at 30 °C ambient temperature:

• Digital Temperature Effects: 0.003 °C x (30 - 20) = 0.03 °C

• D/A Effects: No D/A effects apply

• Worst Case Error: Digital + Digital Temperature Effects = 0.15 °C + 0.03 °C = 0.18 °C

• Total Probable Error:

OUNDATION fieldbus devices)

A-9

Rosemount 644

Failure Mode Switch (HART) or Simulation Switch (F

OUNDATION Fieldbus)

Standard

Sensor

Terminals

Communication

Terminals

60 (2.4)

(1.3)

Power

Terminals

33 (1.30)

24 (1.0)

Meter

Connector

(1.3)

60 (2.4)

34 (1.33)

WAGO Spring

Clamp Sensor

Terminals

24 (1.0)

Communication

Terminals

Failure Mode Switch (HART) or Simulation Switch (F

OUNDATION Fieldbus)

Meter

Connector

Power

Terminals

95 (3.74)

96 (3.76)

112 (4.41)

Meter Cover

316 SST “U” Bolt Mounting, 2-inch Pipe

(2.93)

Label

Standard

Cover

LCD

Display

103 (4.03) with LCD Display

78 (3.07)

128 (5.04) with LCD Display

100

(3.93)

104

(4.09)

DIMENSIONAL DRAWINGS

Reference Manual

00809-0100-4728, Rev KA

July 2010

644H (DIN A Head Mount)

Shown with Standard Compression Screw Terminals

Threaded-Sensor Universal Head

(Option code J5 or J6)

Shown with WAGO® Spring Clamp Terminals

Integral DIN Style Sensor

Connection Head

Note: A “U” Bolt is shipped with each universal head unless assembly option X1, X2, or X3 is ordere d. Since thehead is integrall y mounted to the sensor, it may not need to be used.

A-10

Dimensions are in millimeters (inches)

Note: The DIN Style Integral sensor connection head is only available through Volume 2 of the Rosemount Temperature Sensors and Accessories Product Data Sheet (doc ument number 00810-0101-2654).

Reference Manual

(1.4)

104

(4.1)

(3.2)

Sensor Terminals

Power Terminals

644H

Captive Mounting

Screws and Springs

Meter Spacer

LCD Display

10 pin Connector

Transmitter

Mounting Hardware

Rail Clip

Transmitter

Mounting Hardware

Rail Clip

G-Rail

Grooves

Top Hat Rail

Grooves

Screw Holes for Mounting to a Wall

Kit includes replacement bracket and screws.

Existing Threaded Sensor Connection Head (former option code L1)

00809-0100-4728, Rev KA July 2010

Rosemount 644

644 Rail Mount

HART Protocol Only

Mounting

G-Rail (asymmetric) Top Hat Rail (symmetric)

LCD Display

Head Mount Transmitter

Universal Clip for Mounting to a Wall or a Rail

(part number 03044-4103-0001)

Note: Kit (part number 00644-5301-0010) includes mounting hardware and both types of rail kits.

644H Retrofit Kit

Note: Kit (part number 00644-5321-0010) includes a new mounting bracket and the hardware necessary to facilitate the installation.

A-11

Reference Manual

00809-0100-4728, Rev KA

Rosemount 644

July 2010

ORDERING INFORMATION

Table A-1. Rosemount 644 Smart Temperature Transmitter Ordering Information

★ The Standard offering represents the most common models and options. These options should be selected for best delivery.

__The Expanded offering is manufactured after receipt of order and is subject to additional delivery lead time.

● = Available – = Not Available

Model Product Description

644 Smart Temperature Transmitter

Transmitter Type

Standard Standard

H Head Mount (suitable for mounting in the field with enclosure options below) R Rail Mount ★

Output

Head Rail

Standard Standard

A 4–20 mA with Digital Signal based on HART protocol F FOUNDATION fieldbus digital signal (includes 2 AI function blocks and Backup Link Active

● ●

●

– ★

Scheduler)

W Profibus PA digital signal

●

– ★

Product Certifications

Hazardous Locations Certificates (consult factory for availability)

A F W A F W

Standard Standard

E5 I5 K5

(1)

(2)

FM Explosion–Proof FM Intrinsic Safety (includes standard I.S. and FISCO for fieldbus units)

(2)

FM Intrinsic Safety and Explosion–Proof combination (includes standard I.S. and

● ● ● – – –

● ● ● ● – –

● ● ● – – –

FISCO for fieldbus units)

KC FM/CSA Intrinsic Safety and Non-incendive Approval

(2)

I6 K6

CSA Intrinsic Safety (includes standard I.S. and FISCO for fieldbus units)

(1)(3)

CSA Intrinsic Safety and Explosion–Proof combination (includes standard I.S. and

● ● ● – – –

FISCO for fieldbus units) I3 NEPSI Intrinsic Safety E3 NEPSI Flameproof

(1)

E1 N1

ATEX Flameproof

(1)

ATEX Type n NC ATEX Type n Component

(1)

ND I1 E7 I7 N7

(2)

(3)(2)

ATEX Dust Ignition–Proof

ATEX Intrinsic Safety (includes standard I.S. and FISCO for fieldbus units)

(1)

IECEx Flameproof and Dust

IECEx Intrinsic Safety (includes standard I.S. and FISCO for fieldbus units)

(1)(3)

IECEx Type n NG IECEx Type n Component

(1)(3)

TIIS Explosion–Proof E2 INMETRO Flameproof NA No approval

OPTIONS

● ● ● – – –

● ● ● ● – –

● ● ● – – –

● ● ● ● – –

● ● ● – – –

● ● ● ● – –

● ● ● – – –

● ● ● ● – –

● ● ● – – –

● ● ● ● – –

A F W A F W

Plant Web Software Functionality Standard Standard

A01 Regulatory Control Suite – 1 PID Block

– ● – – – –

Assembly Standard Standard

XA Sensor specified separately and assembled to transmitter

● ● ● – – –

★

A-12

Reference Manual

00809-0100-4728, Rev KA July 2010

Table A-1. Rosemount 644 Smart Temperature Transmitter Ordering Information

★ The Standard offering represents the most common models and options. These options should be selected for best delivery.

__The Expanded offering is manufactured after receipt of order and is subject to additional delivery lead time.

Enclosure Standard Standard

(4)(5)

(3)

(3)(5)

(3)

Expanded

S1 Connection Head, Polished Stainless Steel (1/2–14 NPT entries) S2 Connection Head, Polished Stainless Steel (1/2–14 NPSM entries) S3 Connection Head, Polished Stainless Steel (M20 x 1.5 conduit and entries) S4 Connection Head, Polished Stainless Steel (M20 x 1.5 conduit entries, M24 x 1.5 head

Local Display (644H only) Standard Standard

M5 LCD Display

Expanded

M6 LCD Display with Polycarbonate Meter Face

Configuration Standard Standard

C1 Factory configuration date, descriptor, and message fields (CDS, document number

Analog Output Standard Standard

A1 Analog output levels compliant with NAMUR-recommendations NE 43: June 1997: high

CN Analog output levels compliant with NAMUR-recommendations NE 43: June 1997: low

C8 Low Alarm (standard Rosemount alarm and saturation values)

Filter Standard Standard

F6 60 Hz line voltage filter

Trim Standard Standard

C2 Transmitter-sensor matching, trim to specific Rosemount RTD calibration schedule

Calibration Option Standard Standard

C4 5-point calibration. Use option code Q4 to generate a calibration certificate Q4 Calibration certificate. 3-Point calibration with certificate

Universal Head (junction box), aluminum alloy with 50.8 mm (2-in.) SST pipe bracket

(M20 entries)

Universal Head (junction box), aluminum alloy with 50.8 mm (2-in.) SST pipe bracket

/2–14 NPT entries)

(

Universal Head (junction box), cast SST with 50.8 mm (2-in.) SST pipe bracket (M20

entries)

Universal Head (junction box), cast SST with 50.8 mm (2-in.) SST pipe bracket (1/2–14

NPT entries)

entry)

00806-0100-4728 required).

alarm configuration

(CVD constants)

Rosemount 644

● = Available – = Not Available

Head Rail

A F W A F W

● ● ● – – –

● ● ● ● – –

● – – ● – –

● ● ● ● – –

★

A-13

Reference Manual

00809-0100-4728, Rev KA

Rosemount 644

Table A-1. Rosemount 644 Smart Temperature Transmitter Ordering Information

★ The Standard offering represents the most common models and options. These options should be selected for best delivery.

__The Expanded offering is manufactured after receipt of order and is subject to additional delivery lead time.

● = Available – = Not Available

Head Rail

A F W A F W

Accessory Options Standard Standard

G1 External ground lug assembly G2 Cable gland

(7)

, EEx d, Brass, 7.5 mm - 11.99 mm

G7 Cable gland, M20x1.5, EEx e, Blue, Polyamide, Diam 5-9mm

G3 Cover chain. Only available with enclosure option codes J5 or J6. Not available with

LCD Display option code M5. G5 WAGO spring clamp terminals

Interlinkbt Connector Standard Standard

(8)

GE GM

Eurofast® Interlinkbt Connector

(8)

Minifast® Interlinkbt Connector

External Label Standard Standard

EL External label for ATEX Intrinsic Safety

Typical Rail Mount Model Number: 644 R A I5 Typical Head Mount Model Number: 644 H F I5 M5 J5 C1

(1) Requires enclosure option J5, J6, J7 or J8. (2) When IS approval is ordered on a F (3) Consult factory for availability. (4) Suitable for remote mount configuration. (5) When ordered with XA, (6) Only available with Enclosure option code J5 or J6. For A TEX approved unit s the Grou nd Lug Assembly is included. It is not necessary to include code G1

for units with ATEX approvals. (7) Only available with Enclosure option code J5. (8) Available with Intrinsically Safe approvals only. For FM Intrinsically Safe or non-incendive approval (option code I5), install in accordance with Rosemount

drawing 03151-1009 to maintain NEMA 4X rating.

/2" NPT enclosure will come equipped with an M20 adapter with the sensor inst alled as process ready.

(6)

(see “External Ground Screw Assembly” on page A-15)

OUNDATION fieldbus, both standard IS and FISCO IS app rovals apply. The device label is marked appropriately.

● ●

●

– – –

July 2010

★

NOTE

For additional options (e.g. “K” codes), please contact your local Emerson Process Management representative.

A-14

Reference Manual

00809-0100-4728, Rev KA July 2010

Rosemount 644

Tagging

Hardware

• Order with C1 option

• 13 characters total

• Tags are adhesive labels

• Permanently attached to transmitter

• Character height is

Software

• Order with C1 option

• The transmitter can store up to 13 characters for F for HART protocol. If no characters are specified, the first 8 characters of the hardware tag are the default.

Considerations

Special Mounting Considerations

See “Mounting” on page A-11 for the special hardware that is available to:

• Mount a 644H to a DIN rail. (see Table 4 on page A-15)

• Retrofit a new 644H to replace an existing 644H transmitter in an existing threaded sensor connection head.(see Table 4 on page A-15)

/16-in (1.6 mm)

OUNDATION fieldbus and Profibus PA or 8

External Ground Screw Assembly

The external ground screw assembly can be ordered by specifying code G1 when an enclosure is specified. However, some approvals include the ground screw assembly in the transmitter

shipment, hence it is not necessary to order code G1. The table below identifies which approval options include the external ground screw assembly and which do not.

External Ground Screw

Approval Type

E5, I1, I2, I5, I6, I7, K5, K6, NA, I4 E1, E2, E3, E4, E7, K7, N1, N7, ND

Assembly Included?

No–Order option code G1

Yes

TABLE 4. Transmitter Accessories

Part Description

Aluminum alloy Universal Head, standard cover—M20 entries Aluminum alloy Universal Head, meter cover—M20 entries Aluminum alloy Universal Head, standard cover—1/2-14 NPT entries Aluminum alloy Universal Head, meter cover—1/2-14 NPT entries LCD Display (includes meter and meter spacer assembly) LCD Display kit (includes meter and meter spacer assembly, and meter cover) Ground screw assembly kit Kit, Hardware for mounting a 644H to a DIN rail (includes clips for symmetrical and asymmetrical rails) Kit, Hardware for retrofitting a 644H in an existing threaded sensor connection head (former option code L1) Kit, 316 U-Bolt for Universal Housing Universal clip for rail or wall mount 24 Inches of symmetric (top hat) rail 24 Inches of asymmetric (G) Rail Ground clamp for symmetric or asymmetric rail End clamp for symmetric or asymmetric rail Snap rings kit (used for assembly to a DIN sensor – quantity 12) SST Universal Head, standard cover—M20 entries SST Universal Head, meter cover—M20 entries

Part Number

00644-4420-0002

00644-4420-0102

00644-4420-0001

00644-4420-0101

00644-4430-0002

00644-4430-0001

00644-4431-0001

00644-5301-0010

00644-5321-0010

00644-4423-0001

03044-4103-0001

03044-4200-0001

03044-4201-0001

03044-4202-0001

03044-4203-0001

00644-4432-0001

00644-4433-0002

00644-4433-0102

A-15

Rosemount 644

TABLE 4. Transmitter Accessories

Part Description

SST Universal Head, standard cover—1/2-14 NPT entries SST Universal Head, meter cover—1/2-14 NPT entries Polished SST Connection Head, standard cover—1/2-14 NPT entries Polished SST Connection Head, meter cover—1/2-14 NPT entries Polished SST Connection Head, standard cover—1/2-14 NPSM entries Polished SST Connection Head, meter cover—1/2-14 NPSM entries Polished SST Connection Head, standard cover—M20 x 1.5 entries Polished SST Connection Head, meter cover—M20 x 1.5 entries Polished SST Connection Head, standard cover—M20 x 1.5 / M24 x 1.5 entries Polished SST Connection Head, meter cover—M20 x 1.5 / M24 x 1.5 entries

Reference Manual

00809-0100-4728, Rev KA

July 2010

Part Number

00644-4433-0001

00644-4433-0101

00079-0312-0011

00079-0312-0111

00079-0312-0022

00079-0312-0122

00079-0312-0033

00079-0312-0133

00079-0312-0034

00079-0312-0134

A-16

Reference Manual

00809-0100-4728, Rev KA July 2010

Configuration Transmitter Configuration

The transmitter is available with standard configuration setting for either HART (see “Standard HART Configuration”) or F “Standard Foundation fieldbus Configuration”). The configuration settings and block configuration may be changed in the field with DeltaV or other F

Custom Configuration

Custom configurations are to be specified when ordering. This configuration must be the same for all sensors. The following table lists the necessary requirements to specify a custom configuration.

HART only

OUNDATION fieldbus host or configuration tool.

Requirements/

Option Code

C1: Factory Configuration Data (CDS required)

C2:Transmitter – Sensor Matching

A1: NAMURCompliant, High Alarm CN: NAMURCompliant, Low Alarm

C4: Five Point Calibration

F6: 60 Hz Line Filter Calibrated to a 60 Hz line voltage filter instead of 50 Hz filter

Specification

Date: day/month/year Descriptor: 16 alphanumeric characters Message: 32 alphanumeric character Analog Output: Alarm and saturation levels

The transmitters are designed to accept Callendar-Van Dusen constants from a calibrated RTD. Using these constants, the transmitter generates a custom curve to match the sensor-specific curve. Specify a Series 65, 65, or 78 RTD sensor on the order with a special characterization curve (V or X8Q4 option). These constants will be programmed into the transmitter with this option High Alarm = 21.5 mA Upscale Saturation = 20.5 mA Low Alarm = 3.6 mA Downscale Saturation = 3.8 mA

Will include 5-point calibration at 0, 25, 50, 75, and 100% analog and digital output points. Use with Calibration Certificate Q4.

Rosemount 644

OUNDATION fieldbus (see

, with AMSinside,

Standard HART Configuration

Unless specified, the transmitter will be shipped as follows:

Sensor Type RTD, Pt 100 (=0.00385, 4-wire) 4 mA Value 0 °C 20 mA Value 100 °C Damping 5 seconds Output Linear with temperature Failure/Saturation Modes High (21.75 mA) / Upscale (20.5 mA) Line Voltage Filter 50 Hz Ta g Configuration Data Sheet requires

A-17

Rosemount 644

Note: T

= Sensor Temperature

= Terminal Temperature

AI1

AI2

Reference Manual

00809-0100-4728, Rev KA

July 2010

Standard FOUNDATION fieldbus Configuration

Unless otherwise specified, the transmitter will be shipped as follows for all sensors:

Sensor Type: 4-wire Pt 100 ( = 0.00385) RTD Damping: 5 seconds Units of Measurement: °C Line Voltage Filter: 50 Hz Software Tag: See “Tagging” on page A-15 Function Blocks Tags:

• Resource Block: RB

• Transducer Block: TB

• LCD Block: LCD

• Analog Input Blocks: AI1, AI2 Alarm Range: 0 Alarm Limits of AI1 and AI2:

• HI-HI: 100 °C (212 °F)

• HI: 95 °C (203 °F)

• LO: 5 °C (41 °F)

• LO-LO: 0 °C (32 °F) Local Display (when installed): Engineering Units of Temperature

STAINLESS STEEL HOUSING

Standard Block Configuration

Final Station

AI Blocks are scheduled for 1 second. AI Blocks are linked as shown above.

The Stainless Steel Housing is ideal for Biotechnology, Pharmaceutical Industries, and Sanitary Applications

Weight

Option Code Standard Cover Meter Cover

S1 840 g (27 oz) 995 g (32 oz) S2 840 g (27 oz) 995 g (32 oz) S3 840 g (27 oz) 995 g (32 oz) S4 840 g (27 oz) 995 g (32 oz)

A-18

Enclosure Rating

NEMA 4X, IP66, and IP68

Materials of Construction

Housing and Standard Meter Cover

• 316L SST

Cover O-Ring

• Buna-N

Reference Manual

79.8 (3.14)

70.0 (2.76)

33 (1.3)

76.2 (3.0)

24.4

(0.96)

25.4 (1.0)

44.5 (1.75)

27.9 (1.1)

Standard Cover

Housing

O-Ring

70.0 (2.76)

33 (1.3)

76.2 (3.0)

47 (1.85)

61 (2.4)

25.4 (1.0)

44.5 (1.75)

27.9 (1.1)

74.4 (2.93)

LCD Display Cover

Housing

O-Ring

00809-0100-4728, Rev KA July 2010

Dimensional Drawings

Rosemount 644

LCD Display Cover

• 316L SST

•Glass

Surface

Surface finish is polished to 32 RMA. Laser etched product marking on housing and standard covers.

Sanitary Housing Covers

Standard Cover

LCD Display Cover

Dimensions are in millimeters (inches)

A-19

Rosemount 644

Reference Manual

00809-0100-4728, Rev KA

July 2010

A-20

Rosemount 644 Head and Rail Mount Temperature Transmitters Manuals & Guides

Specifications and Main Features

Frequently Asked Questions

User Manual

Section 1 Introduction

SAFETY MESSAGES Instructions and procedures in this section may require special precautions to

RETURN OF MATERIALS To expedite the return process in North America, call the Emerson Process

Section 2 Installation

SAFETY MESSAGES Instructions and procedures in this section may require special precautions to

MOUNTING Mount the transmitter at a high point in the conduit run to prevent moisture

INSTALLATION

WIRING All power to the transmitter is supplied over the signal wiring. Use ordinary

POWER SUPPLY HART Installation

Section 3 HART Configuration

OVERVIEW This section provides information on configuring, troubleshooting, operating,

SAFETY MESSAGES Instructions and procedures in this section may require special precautions to

COMMISSIONING The 644 must be configured for certain basic variables to operate. In many

FIELD COMMUNICATOR The Field Communicator exchanges information with the transmitter from the

CONFIGURATION The 644 transmitter can be configured either on-line or off-line using a Field

MULTIDROP COMMUNICATION

OPERATION AND MAINTENANCE

OVERVIEW This section provides information on configuring, troubleshooting, operating,

SAFETY MESSAGES Instructions and procedures in this section may require special precautions to

GENERAL BLOCK INFORMATION

FOUNDATION FIELDBUS FUNCTION BLOCKS

HART AND FOUNDATION FIELDBUS SPECIFICATIONS

FOUNDATION FIELDBUS SPECIFICATIONS

4–20 mA / HART SPECIFICATIONS

DIMENSIONAL DRAWINGS

ORDERING INFORMATION

STAINLESS STEEL HOUSING