Siemens 7MF4033 series, 7MF4233 series, 7MF4533 series, 7MF4912 series, 7MF4333 series User Manual

Siemens Energy & Au tomation

SITRANS P, Series DSIII Transmitter

Pressure, Differential Pressure,

Flanged Level, and Absolute Pressure

USER'S MANUAL

UMSITRPDS3-1

Rev. 6 November 2005 Supersedes Rev. 5

for

Model 7MF4*33-...

北京迪妙声科技有限公司

DELLSONIC

BEJING DELLSONICS SCIENCE & TECHNOLOGY L TD.

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IMPORTANT

MODEL 275 HART COMMUNICATOR AND

MODEL 375 FIELD COMMUNICATOR

Many procedures, screens, and wiring diagrams shown in this manual feature the Model 275 HART Communicator.

The Model 375 Field Communicator is now available. Procedures and screens are similar to those for the Model 275, however, there are significant differences and an online Configuration Map for use with the Model 375 is provided at the back of this manual.

Transmitter model and firmware version can affect the displays, display options, and Configuration Maps.

Whether using the Model 275 or the Model 375, be sure to read the manual supplied by the manufacturer before installing or using the device. Refer to the devices nameplate for hazardous are approvals and other important information.

APPLICATION AND MODEL QUICK LOCATOR

The following table provides an overview of measurement categories and available models. For details pertaining to a particular model, see its model designation table and its specification table in Section 9 Model Designations and Specifications. To quickly locate other information, refer to the Table of Contents.

Measurement Models Model Designation Specifications Dimensions

a certifications and

Absolute or Gauge Pressure

Differential Pressure

Level (Flange)

7MF4033 7MF4233 7MF4333

7MF4433 7MF4533

7MF4633 7MF4912

Table 9-1 Table 9-2 Table 9-3

Table 9-4 Table 9-5

Table 9-6 Table 9-6

Table 9-15 Table 9-16 Table 9-16

Table 9-15 Table 9-15

Table 9-16 Table 9-16

Figure 9-1 Figure 9-1 Figure 9-2

Figure 9-2 or 9-3 Figure 9-2 or 9-3

Figure 9-4 Figure 9-4

UMSITRPDS3-1 Contents

TABLE OF CONTENTS

Section and Title Page

Conventions, Symbols, and General Information.................................................................viii

1.0 INTRODUCTION...................................................................................................1-1

1.1 CONTENTS......................................................................................................................1-1

1.2 PRODUCT DESCRIPTION ..............................................................................................1-2

1.3 RATING, APPROVAL, AND TAG PLATES......................................................................1-9

1.4 CONFIGURATION ...........................................................................................................1-9

1.5 PRODUCT SUPPORT ...................................................................................................1-10

2.0 MODEL 275 UNIVERSAL HART COMMUNICATOR...........................................2-1

2.1 INTRODUCTION..............................................................................................................2-1

2.2 COMMUNICATOR CONNECTIONS................................................................................2-1

2.3 CONTROLS OVERVIEW .................................................................................................2-4

2.3.1 Liquid Crystal Display ................................................................................................2-4

2.3.2 Software-Defined Function Keys ...............................................................................2-4

2.3.3 Action Keys................................................................................................................2-6

2.3.4 Alphanumeric and Shift Keys.....................................................................................2-7

2.3.4.1 Rapid Selection of Menu Options........................................................................2-7

2.3.4.2 Data Entry ...........................................................................................................2-7

2.4 GETTING TO KNOW THE COMMUNICATOR ................................................................2-8

2.4.1 Display Icons .............................................................................................................2-8

2.4.2 Menu Structure ..........................................................................................................2-9

2.4.3 Reviewing Installed Devices......................................................................................2-9

2.5 MAIN MENU...................................................................................................................2-11

2.5.1 Offline Menu ............................................................................................................2-12

2.5.1.1 New Configuration.............................................................................................2-13

2.5.1.2 Saved Configuration..........................................................................................2-16

2.5.2 Online Menu ............................................................................................................2-18

2.5.3 Frequency Device Menu..........................................................................................2-21

2.5.4 Utility Menu..............................................................................................................2-21

2.5.4.1 Configure Communicator ..................................................................................2-21

2.5.4.2 System Information ...........................................................................................2-22

2.5.4.3 Listen for PC .....................................................................................................2-22

2.5.4.4 Storage Location ...............................................................................................2-22

2.5.4.5 Simulation .........................................................................................................2-22

2.5.4.6 Selftest ..............................................................................................................2-22

2.6 USING THE QUICK ACCESS KEY................................................................................2-23

2.6.1 Adding Quick Access Key Options ..........................................................................2-24

2.6.2 Deleting Quick Access Key Options ........................................................................2-25

3.0 PRE-INSTALLATION TEST .................................................................................3-1

3.1 PROCEDURE ..................................................................................................................3-1

3.1.1 Test Equipment..........................................................................................................3-2

3.2 ESTABLISHING COMMUNICATION ...............................................................................3-3

3.3 TESTING THE TRANSMITTER........................................................................................3-3

3.4 REVIEWING CONFIGURATION DATA ...........................................................................3-4

3.5 CHECKING TRANSMITTER OUTPUT ............................................................................3-4

4.0 INSTALLATION....................................................................................................4-1

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Contents UMSITRPDS3-1

4.1 EQUIPMENT DELIVERY AND HANDLING .....................................................................4-1

4.1.1 Receipt of Shipment ..................................................................................................4-1

4.1.2 Storage ......................................................................................................................4-1

4.2 ENVIRONMENTAL CONSIDERATIONS .........................................................................4-2

4.3 PRE-INSTALLATION CONSIDERATIONS AND CALCULATIONS.................................4-2

4.3.1 Mechanical ................................................................................................................4-2

4.3.2 Electrical ....................................................................................................................4-3

4.3.3 Impulse Piping for Absolute and Differential Models .................................................4-4

4.3.4 Transmitter Operating Mode and Network Type......................................................4-10

4.3.4.1 Analog Mode .....................................................................................................4-10

4.3.4.2 Digital Mode ......................................................................................................4-14

4.3.5 Power Supply Requirements ...................................................................................4-14

4.3.5.1 Point-to-Point Network ......................................................................................4-16

4.3.5.2 Multi-Drop Network ...........................................................................................4-17

4.3.6 Determining Network (Loop) Length........................................................................4-17

4.3.6.1 Cable Capacitance............................................................................................4-17

4.3.6.2 Maximum Cable Length Calculation .................................................................4-18

4.3.7 Network Junctions ...................................................................................................4-19

4.3.8 Safety Barriers.........................................................................................................4-19

4.3.9 Connection of Miscellaneous Hardware ..................................................................4-20

4.3.10 Shielding and Grounding .......................................................................................4-21

4.4 MECHANICAL INSTALLATION .....................................................................................4-22

4.4.1 Pipe Mounting, Differential and Gauge Construction...............................................4-22

4.4.2 Direct Mounting to Process, Model 7MF4433 or 7MF4533 .....................................4-24

4.4.3 Flange Mounting, Model 7MF4633/7MF4912..........................................................4-25

4.5 MECHANICAL INSTALLATION, All Models...................................................................4-27

4.5.1 Enclosure Rotation ..................................................................................................4-27

4.5.2 Display Orientation ..................................................................................................4-28

4.5.3 Electrical Conduit and Cable Installation .................................................................4-29

4.5.3.1 Conduit..............................................................................................................4-29

4.5.3.2 Cables ...............................................................................................................4-30

4.5.3.3 Access to Transmitter Terminal Compartment..................................................4-30

4.6 ELECTRICAL INSTALLATION.......................................................................................4-31

4.7 HAZARDOUS AREA INSTALLATION............................................................................4-33

5.0 POST-INSTALLATION TEST...............................................................................5-1

5.1 TEST EQUIPMENT..........................................................................................................5-1

5.2 INSTALLATION REVIEW.................................................................................................5-1

5.3 EQUIPMENT CONNECTION...........................................................................................5-2

5.4 VERIFICATION ................................................................................................................5-3

5.4.1 Communication Test..................................................................................................5-3

5.4.2 Transmitter Selftest....................................................................................................5-3

5.4.3 Loop Test...................................................................................................................5-4

5.5 TRANSMITTER ZERO AND SHUTOFF VALVE MANIPULATION..................................5-5

5.5.1 Absolute Pressure .....................................................................................................5-5

5.5.1.1 Measuring Gases ................................................................................................5-6

5.5.1.2 Measuring Vapor and Liquid ...............................................................................5-7

5.5.2 Differential Pressure and Flow...................................................................................5-8

5.5.2.1 Measuring Gases ................................................................................................5-8

5.5.2.2 Measuring Liquids ...............................................................................................5-9

5.5.3 Measuring Vapor .....................................................................................................5-11

6.0 ON-LINE CONFIGURATION AND OPERATION .................................................6-1

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UMSITRPDS3-1 Contents

6.1 LOCAL OPERATION AND DISPLAY ...............................................................................6-1

6.1.1 Digital Display............................................................................................................6-1

6.1.2 Numeric Display.........................................................................................................6-2

6.1.3 Unit/Bargraph Display................................................................................................6-3

6.1.4 Error Message ...........................................................................................................6-3

6.1.5 Output Signal Range .................................................................................................6-3

6.1.6 Mode Display............................................................................................................6-4

6.2 LOCAL OPERATION WITH THE MAGNETIC PUSHBUTTONS .....................................6-5

6.2.1 Cancel Pushbutton Disable and Write Protection......................................................6-7

6.2.2 Set/Adjust Zero and Full Scale ..................................................................................6-7

6.2.2.1 Theoretical Relationships....................................................................................6-7

6.2.2.2 Practical Applications..........................................................................................6-9

6.2.3 Electric Damping......................................................................................................6-10

6.2.4 Blind Setting of Zero and Full Scale ........................................................................6-10

6.2.4.1 Theoretical Relationships..................................................................................6-10

6.2.4.2 Practical Applications........................................................................................6-11

6.2.5 Zero Adjustment (Position Correction).....................................................................6-12

6.2.5.1 Zero-Point Alignment at Absolute Pressure ......................................................6-12

6.2.6 Fixed Current Output ...............................................................................................6-13

6.2.7 Failure Current.........................................................................................................6-13

6.2.8 Pushbutton and Function Disable............................................................................6-14

6.2.9 Flow Measurement (Differential Pressure only).......................................................6-14

6.2.10 Select Measured Value to be Displayed................................................................6-16

6.2.11 Select the Displayed Input Pressure Engineering Unit..........................................6-16

6.3 LOCAL OPERATION WITHOUT A DISPLAY OR WITH ACTIVATED KEYLOCK.........6-18

6.3.1 Set Zero and Full Scale ...........................................................................................6-18

6.4 REMOTE CONFIGURATION AND OPERATION BY HART..........................................6-20

6.4.1 Process Data ...........................................................................................................6-20

6.4.2 Setting Zero and Full Scale .....................................................................................6-21

6.4.3 Blind Setting of Zero and Full Scale ........................................................................6-21

6.4.4 Zero Adjustment for Position Correction..................................................................6-21

6.4.5 Electric Damping......................................................................................................6-22

6.4.6 Fast Measured Value Acquisition (fast response mode) .........................................6-22

6.4.7 Fixed Current Output ...............................................................................................6-23

6.4.8 Fault Current............................................................................................................6-23

6.4.9 Disabling the Transmitter Magnetic Pushbuttons and Write Protection...................6-24

6.4.10 Measured Value Display........................................................................................6-25

6.4.11 Select Pressure Engineering Units........................................................................6-25

6.4.12 Display/Bargraph ...................................................................................................6-25

6.4.13 Sensor Trim ...........................................................................................................6-26

6.4.13.1 Trimming the Lower Sensor Adjustment Point................................................6-26

6.4.13.2 Trimming the Upper Sensor Adjustment Point................................................6-27

6.4.14 D/A Trim.................................................................................................................6-28

6.4.15 Transmitter Current Adjustment.............................................................................6-28

6.4.16 Factory Calibration (Manufacturer Trims)..............................................................6-29

6.4.17 Device Information.................................................................................................6-30

6.4.18 Flow Measurement (Differential Pressure) ............................................................6-30

6.4.19 Diagnostic Functions .............................................................................................6-30

6.4.19.1 Operating Hours Counter ................................................................................6-31

6.4.19.2 Calibration Timer and Service Timer...............................................................6-31

6.4.19.3 Min/Max Pointer ..............................................................................................6-32

6.4.19.4 Monitoring the Saturation Current ...................................................................6-32

6.4.20 Simulation..............................................................................................................6-33

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Contents UMSITRPDS3-1

6.4.21 Self Test and Master Reset ...................................................................................6-34

7.0 CALIBRATION AND MAINTENANCE .................................................................7-1

7.1 CALIBRATION .................................................................................................................7-2

7.2 PREVENTIVE MAINTENANCE........................................................................................7-3

7.2.1 Transmitter Exterior Inspection..................................................................................7-3

7.2.2 Transmitter Exterior Cleaning....................................................................................7-3

7.2.3 Transmitter Enclosure Interior Inspection..................................................................7-4

7.2.4 Transmitter Calibration ..............................................................................................7-4

7.2.5 Impulse Piping ...........................................................................................................7-4

7.3 TROUBLESHOOTING .....................................................................................................7-5

7.3.1 Analog Output............................................................................................................7-5

7.3.2 Digital Output (Communication).................................................................................7-8

7.4 ASSEMBLY REMOVAL AND REPLACEMENT ...............................................................7-9

7.4.1 Display Assembly ....................................................................................................7-11

7.4.2 Replacing the Electronics Module ...........................................................................7-12

7.4.3 Measuring Cell Assembly Removal and Replacement............................................7-13

7.4.4 Terminal Board Assembly Removal and Replacement ...........................................7-16

7.5 NON-FIELD-REPLACEABLE ITEMS.............................................................................7-16

7.6 TRANSMITTER REPLACEMENT..................................................................................7-17

7.7 MAINTENANCE RECORDS ..........................................................................................7-18

7.8 RECOMMENDED SPARE AND REPLACEMENT PARTS............................................7-18

7.9 COMPATIBILITY, Revision Numbers.............................................................................7-19

8.0 CIRCUIT DESCRIPTION ......................................................................................8-1

8.1 OVERALL OPERATION...................................................................................................8-2

8.2 PRESSURE......................................................................................................................8-2

8.3 DIFFERENTIAL PRESSURE AND FLOW .......................................................................8-3

8.4 FLANGED LEVEL ............................................................................................................8-3

8.5 ABSOLUTE PRESSURE (DIFFERENTIAL CONSTRUCTION).......................................8-4

8.6 ABSOLUTE PRESSURE (GAUGE CONSTRUCTION) ...................................................8-4

8.7 COMMUNICATION FORMAT ..........................................................................................8-5

9.0 MODEL DESIGNATIONS AND SPECIFICATIONS .............................................9-1

9.1 MODEL DESIGNATIONS.................................................................................................9-1

9.2 ACCESSORIES .............................................................................................................9-20

9.3 SPECIFICATIONS .........................................................................................................9-21

9.4 MEASURING SPANS AND OVERLOAD LIMITS ..........................................................9-29

9.5 NETWORK TOPOLOGY................................................................................................9-35

9.5.1 Two-Wire Cable.......................................................................................................9-35

9.6 HAZARDOUS AREA cLASSIFICATIONS......................................................................9-35

9.6.1 CSA Hazardous Locations Precautions...................................................................9-36

10.0 GLOSSARY......................................................................................................10-1

11.0 APPENDIX A - ONLINE CONFIGURATION MAP............................................11-1

12.0 APPENDIX B - HAZARDOUS AREA INSTALLATION....................................12-1

13.0 APPENDIX C - ELEVATION AND SUPPRESSION CORRECTIONS..............13-1

13.1 HOW ADJUSTMENT IS MADE....................................................................................13-1

13.2 ELEVATION CALCULATION EXAMPLE .....................................................................13-2

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UMSITRPDS3-1 Contents

13.3 SUPPRESSION CALCULATION EXAMPLE ...............................................................13-2

13.4 RECOMMENDED METHOD ........................................................................................13-3

Warranty.....................................................................................................................W-1

LIST OF FIGURES

Figure and Title Page

1-1 Gauge Construction, Pressure and Absolute Pressure Models .........................................1-3

1-2 Differential Construction; Differential, Flow, and Absolute Models .....................................1-4

1-3 Differential Pressure and Flow Models with H03 Option ....................................................1-5

1-4 Flanged Liquid Level Models ..............................................................................................1-6

1-5 Traditional Application ........................................................................................................1-7

1-6 Display................................................................................................................................1-8

1-7 Field Terminals ...................................................................................................................1-8

2-1 Model 275 Universal HART Communicator........................................................................2-2

2-2 HART Communicator Connections to a Transmitter Loop .................................................2-3

2-3 HART Communicator Display Icons ...................................................................................2-8

2-4 Offline Menu Map .............................................................................................................2-12

2-5 SITRANS P Online Menu Map .........................................................................................2-19

2-6 Generic Online Menu Map................................................................................................2-20

3-1 Bench Test Connections.....................................................................................................3-1

3-2 Field Test Connections.......................................................................................................3-2

4-1 Differential Flow Measurement Piping for Gas and Liquid..................................................4-5

4-2 Differential Liquid Measurement Piping ..............................................................................4-6

4-3 Absolute or Gauge Pressure Measurement Piping ............................................................4-7

4-4 Steam Service, Below the Line Mounting ...........................................................................4-8

4-5 Open and Closed Tank Level Measurement, Flange Mounted Transmitters .....................4-9

4-6 Point-To-Point Network (Analog Mode) ............................................................................4-11

4-7 Procidia to Transmitter Connections (Analog Mode) ........................................................4-12

4-8 Model 353/354 to Transmitter Connections (Analog Mode) .............................................4-13

4-9 Multi-Drop Network (Digital Mode)....................................................................................4-15

4-10 Power Supply vs. Loop Resistance ................................................................................4-16

4-11 Pipe Mounting, Gauge Construction...............................................................................4-23

4-12 Pipe Mounting, Differential Construction ........................................................................4-23

4-13 Differential Construction, Position Options .....................................................................4-24

4-14 Enclosure Rotation Considerations ................................................................................4-27

4-15 Display Removal and Repositioning ...............................................................................4-28

4-16 Conduit Drain and Explosion Proof Installations.............................................................4-29

4-17 Network Conductor Terminations ...................................................................................4-32

5-1 Equipment Connection for System Checkout .....................................................................5-2

5-2 Measuring Gases................................................................................................................5-6

5-3 Measuring Vapor and Liquid...............................................................................................5-7

5-4 Measuring Gases................................................................................................................5-9

5-5 Measuring Liquids.............................................................................................................5-10

5-6 Measuring Vapor ..............................................................................................................5-11

6-1 Digital Display.....................................................................................................................6-1

6-2 Switch Point of the Square Root Characteristic................................................................6-15

6-3 Displayable Engineering Units..........................................................................................6-17

6-4 Sensor Trim ......................................................................................................................6-27

6-5 Pressure Min/Max Pointer Example .................................................................................6-32

6-6 Saturation Monitoring Examples.......................................................................................6-33

6-7 Simulation Circuit Diagram ...............................................................................................6-34

November 2005

Contents UMSITRPDS3-1

11-1 Online Configuration Map, Part 1 of 2 ............................................................................11-2

11-2 Online Configuration Map, Part 2 of 2 ............................................................................11-3

12-1 Control Drawing ..............................................................................................................12-2

12-2 Control Drawing ..............................................................................................................12-3

13-1 Elevated Span ................................................................................................................13-1

13-2 Suppressed Span ...........................................................................................................13-1

LIST OF TABLES

Table and Title Page

1-1 Measurements, Models and Figure References.................................................................1-2

1-2 Contact Information ..........................................................................................................1-10

2-1 Function Keys with Their Labels and Actions Performed ...................................................2-5

2-2 Communicator Firmware Device Descriptions, Rev. F2.2 ................................................2-10

2-3 Offline Menu Map Continued, “Edit individually” Options1................................................2-12

4-1 Operating Mode and Network...........................................................................................4-10

4-2 Flange And Extension Dimensions...................................................................................4-26

6-1 Operating Mode and Status Arrows....................................................................................6-2

6-2 Parameters Accessible Using the Magnetic Pushbuttons ..................................................6-6

6-3 Pushbutton and Function Disable Options .......................................................................6-14

6-4 Pushbutton and Function Disable Options .......................................................................6-24

9-1 Model 7MF4033, Model Designation ..................................................................................9-2

9-2 Model 7MF4233, Model Designation ..................................................................................9-4

9-3 Model 7MF4333, Model Designation ..................................................................................9-6

9-4 Model 7MF4433, Model Designation ...................................................................................9-8

9-5 Model 7MF4533, Model Designation .................................................................................9-10

9-6 Models 7MF4633 and 7MF4912, Model Designation .......................................................9-12

November 2005

UMSITRPDS3-1 Contents

Changes for Revision 6, November 2005

Significant changes for Rev. 6 are indicated by change bars in the page margins. Some are listed below.

Section Revision

Cover Manual revision number and date changed. Product Support Update Contact Information table. Warranty Update warranty statements to include reference to the Operating

Hours Register.

SITRANS P, Series DS III, and Procidia are Siemens Energy & Automation, Inc. trademarks. All other trademarks are the property of their respective owners. All product designations may be trademarks or product names of Siemens Energy & Automation, Inc. or other supplier companies whose use by third parties for their own purposes could violate the rights of the owners.

Siemens Energy & Automation, Inc. assumes no liability for errors or omissions in this document or for the application and use of information included in this document. The information herein is subject to change without notice.

Procedures in this document have been reviewed for compliance with applicable approval agency requirements and are considered sound practice. Neither Siemens Energy & Automation, Inc. nor these agencies is responsible for repairs made by the user.

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UMSITRPDS3-1 Contents

For the purpose of this manual and product labels, a qualified person is one who is familiar with the installation, assembly, commissioning, and operation of the product, and who has the appropriate qualifications for their activities such as:

• Training, instruction, or authorization to operate and maintain devices/systems according to the safety standards for electrical circuits, high pressures, and corrosive, as well as, critical media.

• For devices with explosion protection: training, instruction or authorization to work on electrical circuits for systems that could cause explosions.

• Training or instruction according to the safety standards in the care and use of suitable safety equipment.

Scope

This manual does not purport to cover all details or variations in equipment, nor to provide for every possible contingency to be met in connection with installation, operation, or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, the matter should be referred to one of the support groups listed in the Product Support section of this manual.

The contents of this manual shall not become part of or modify any prior or existing agreement, commitment or relationship. The sales contract contains the entire obligation of Siemens. The warranty contained in the contract between the parties is the sole warranty of Siemens. Any statements continued herein do not create new warranties or modify the existing warranty.

General Warnings and Cautions

WARNING

An explosion-proof device may be opened only after power is removed from the device.

An intrinsically safe device loses its license as soon as it is operated in a circuit that does not meet the requirements of the examination certificate valid in your country.

The device may be operated with high pressure and corrosive media. Therefore, serious injury and/or considerable material damage cannot be ruled out in the event of handling of the device.

The perfect and safe operation of the equipment is conditional upon proper transport, proper storage, installation and assembly, as well as, on careful operation and commissioning.

The equipment may be used only for the purposes specified in this User’s Manual.

CAUTION

Electrostatic discharge can damage or cause the failure of semiconductor devices such as integrated circuits and transistors. The symbol at right appears on a circuit board or other electronic assembly to indicate that special handling precautions are needed.

November 2005

Contents UMSITRPDS3-1

• A properly grounded conductive wrist strap must be worn whenever an electronics module or circuit board is handled or touched. A service kit with a wrist strap and static dissipative mat is available from Internet, mail order, and local electronic supply companies.

• Electronic assemblies must be stored in static protective bags when not installed in equipment.

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November 2005

UMSITRPDS3-1 Introduction

1.0 INTRODUCTION

This user’s manual is for the Siemens Energy & Automation SITRANS P Series DSIII Pressure Transmitters.

All information needed to bench test, install, configure, calibrate, and service a transmitter is included in this user’s manual.

IMPORTANT

Save this user’s manual. It should be available to those installing, configuring, operating, and servicing the described pressure transmitters.

1.1 CONTENTS

The user’s manual consists of a table of contents, ten sections, and three appendices. Following the table of contents is a subsection that contains important information about the symbols that can appear in this user’s manual and on the transmitter. The subsection also has statements about installing and servicing the transmitter. A brief description of each major section and appendices follows.

Section 1, Introduction, describes each section in the manual and provides a brief description of the SITRANS P Series DSIII Pressure Transmitter line. A product support section has telephone, fax, E-mail, and Internet contact information.

Section 2, Model 275 Universal HART Communicator, describes use of the HART Communicator to test, configure, and calibrate a transmitter.

Section 3, Pre-Installation Test, provides procedures to perform a bench test of the transmitter to ensure proper operation of all transmitter functions. Start-up configuration is described here.

Section 4, Installation, furnishes specific information for mechanical and electrical installation of the transmitter.

Section 5, Post-Installation Test, describes how to confirm that the transmitter has been installed correctly

- sometimes referred to as commissioning.

Section 6, On-Line Configuration and Operation, details local configuration using the magnetic pushbuttons and remote configuration using the HART Communicator. Local operation and remote operation of the transmitter are described.

Section 7, Calibration and Maintenance, provides references to calibration procedures for analog and digital modes and to a zeroing procedure for mounting position. It also furnishes preventive maintenance, troubleshooting, and assembly replacement procedures.

Section 8, Circuit Description, contains an assembly-level circuit description to support transmitter servicing.

Section 9, Model Designations and Specifications, has tables that correlate rating plate model numbers to transmitter physical configurations. This section also contains an accessory list and several service parts lists. Detailed mechanical, functional, performance, and environmental specifications are provided, as are dimension drawings of the transmitter. Hazardous area certifications are listed.

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Introduction UMSITRPDS3-1

Section 10, Glossary, contains definitions of various transmitter-related terms.

Appendix A, Online Configuration Map, is used to help navigate HART/transmitter menus during remote configuration and operation of the transmitter.

Appendix B, Hazardous Area Installations, contains control drawings and other information needed for installation in a hazardous area.

Appendix C, Elevation and Suppression Corrections, explains how to perform elevation and suppression calculations necessary for certain liquid level gauging applications.

Warranty contains the product warranty statements and information concerning servicing of the product during the warranty period.

1.2 PRODUCT DESCRIPTION

SITRANS P Series DSIII transmitters provide reliable, accurate, stable, and cost-effective measurement of differential, absolute, and gauge pressure and liquid level.

The transmitter is a microcontroller-based, self-contained pressure-to-current transducer. A measuring cell senses the applied process pressure and provides an analog output signal that is proportional to applied pressure. An analog-to-digital converter produces a digital signal for the microcontroller. The microcontroller modifies and corrects the signal for linearity and temperature, and a digital-to-analog converter produces a 4-20 milliampere output signal for the loop.

The transmitter can be installed quickly and easily using one of the optional mounting brackets. Illustrations showing mounting hardware and dimensions are provided in this manual. Measuring cell construction determines a transmitter’s physical dimensions and mechanical installation. Note that a given sensor construction can involve one or more measurement methods, as shown in Table 1-1.

TABLE 1-1 Measurements, Models and Figure References

Measurement Model And Measuring Cell Construction Refer To

Absolute or Gauge Pressure 7MF4033, Gauge Construction

7MF4233, Gauge Construction

Figures 1-1, 4-3, 4-4, 411, 4-13, 9-1 and 9-2

7MF4333, Differential Construction

Differential Pressure 7MF4433, Differential Construction

7MF4533, Differential Construction

Liquid Level (Flange) 7MF4633, Flange Construction

7MF4912, Flange

Figures 1-2, 1-3, 4-1, 42, 4-12, 4-13, 9-2, and 93

Figures 1-4, 4-5, and 9-4

Figures 1-1 through 1-4 show the various transmitter models and constructions. They also show common transmitter mounting methods. The mounting brackets shown are optional.

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UMSITRPDS3-1 Introduction

Process connection: 1/2-NPT, connection shank G1/2A Oval flange

Blanking plug

Electrical connection: Screwed gland M20 x 1.5 Screwed gland 1/2-14NPT

Field terminals; remove enclosure cap for access

Electronics module and display; remove enclosure cap for access

FIGURE 1-1 Gauge Construction, Pressure and Absolute Pressure Models

Hinged access cover over magnetic pushbuttons

Mounting bracket, optional

Tag plate

Approval plate; Rating plate on other side

Enclosure ground screw

Enclosure setscrew

Enclosure rotation limits

Enclosure rotation reference arrow; see Section 4 for details

This Figure is for Models 7MF4033 and 7MF4233

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Introduction UMSITRPDS3-1

Process Connection 1/4-18NPT for absolute pressure + side

Mounting thread M10, M12 or 7/16-20UNF

Blanking plug

Electrical connection: Screwed gland M20 x 1.5 Screwed gland 1/2-14NPT

Field terminals; remove enclosure cap for access

Electronics module and display; remove enclosure cap for access

Hinged access cover over magnetic pushbuttons

Sealing screw

Side vent for measuring liquid

FIGURE 1-2 Differential Construction; Differential, Flow, and Absolute Models

Side vent for measuring gas (supplement H02)

Mounting bracket, optional

Enclosure setscrew

Enclosure rotation limits (see 14 reference arrow)

Enclosure rotation reference arrow; see Section 4 for details

Tag plate

Approval plate; Rating plate on other side

Enclosure ground screw

This Figure is for Models 7MF4333, 7MF4433, and 7MF4533.

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UMSITRPDS3-1 Introduction

Process connection 1/4-18NPT Mounting thread M10 or 7/16-20UMF

Field terminals; remove enclosure cap for

access Electronics module and display; remove

enclosure cap for access Sealing screw

Enclosure setscrew

Enclosure rotation limits; enclosure

rotation reference arrow on neck (see Section 4 for details)

10 11 12

13 14 15

FIGURE 1-3 Differential Pressure and Flow Models with H03 Option

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Blanking plug Access cover over magnetic pushbuttons Electrical connection: M20 x 1.5 1/2-14NPT Tag plate Approval plate; Rating plate on other side Enclosure ground screw

This Figure is for Models 7MF4433 and 7MF4533 with H03 option.

1-5

Introduction UMSITRPDS3-1

Process connection at low side 1/4-18NPT

Mounting thread M10, M12, or 7/16-20UNF

Blanking plug

Electrical connection: M20 x1.5 1/2-14NPT

Field terminals; remove enclosure cap for access

Electronics module and display; remove enclosure cap for access

Access cover to magnetic pushbuttons

Sealing screw with valve

Enclosure setscrew

Enclosure rotation limits

Enclosure rotation reference arrow (not shown; see Section 4 for details)

Tag plate

Rating plate; approval plate on other side

This Figure is for Models 7MF4633 and 7MF4912

FIGURE 1-4 Flanged Liquid Level Models

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UMSITRPDS3-1 Introduction

A transmitter can operate in either analog mode or digital mode, as discussed in the following paragraphs.

Analog Mode

A single transmitter is connected to a controller, recorder, or other field device. A loop known as a Pointto-Point network interconnects the instruments. Figure 1-5shows a traditional application.

Process Automation Controller

2-Wire

4-20 mA

MG00369b

I/P

Model 773

Differential Transmitter

2-Wire

4-20 mA

Model 353

Flow

FIGURE 1-5 Traditional Application

The HART

(Highway Addressable Remote Transducer) protocol is used for communication between the transmitter and a HART Communicator, a personal computer running configuration software, or another remote device. This is done by superimposing the HART digital signal on the analog current. HART communications can be used to transfer a new or edited configuration, remotely monitor the process variable, or service a transmitter.

Digital Mode

Up to 15 transmitters can be parallel connected to a Multi-Drop network using only shielded, twisted-pair cable. The HART protocol provides communication between the transmitters and a HART-compatible controller, recorder, or other device. Each transmitter is identified by a unique network address that is selected during configuration.

Display, Magnetic Pushbuttons, and Loop Connections

The optional display (Figure 1-6) permits local viewing of input and output variables and status messages, and it simplifies local configuration. Local configuration is performed using three magnetic pushbuttons that are found beneath an access cover in the transmitter housing. Section 6 On-Line Configuration and Operation describes use of the display and magnetic pushbuttons.

Loop connections are made to a terminal assembly with three screw terminals (Figure 1-7). The assembly is located within the transmitter enclosure and is accessed by removing the enclosure cap adjacent to FIELD TERMINALS on the enclosure. The terminal assembly also has terminals to connect an external digital milliammeter for loop troubleshooting and transmitter calibration. Loop wiring is shown in Section 4 Installation.

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Introduction UMSITRPDS3-1

An enclosure ground connection is located on the housing beneath the field terminal enclosure cap. The enclosure should always be grounded by a wire connected from this terminal to an earth ground, even when a ground may be provided by metal conduit protecting the loop wiring.

MG00364b

-4-20mA+

Digital display, optional

Magnetic pushbutton access cover

Enclosure cap

Field terminals for analog output

External digital milliammeter terminals

Enclosure ground

Electrical entrances; plug unused entrance

FIGURE 1-6 Display FIGURE 1-7 Field Terminals

Transmitters have an intrinsically safe, explosion proof, NEMA 4x (IP67/68), field mountable, hardened enclosure. Electrical conduit connections are 1/2-14 NPT or M20 x 1.5. All process wetted materials are 316 stainless steel or better. The flush-mount process connection of the liquid level model is compatible with standard ANSI and metric flange sizes for tanks and pipes.

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UMSITRPDS3-1 Introduction

1.3 RATING, APPROVAL, AND TAG PLATES

These plates are fastened to the outside of the transmitter enclosure, as shown at right. The rating plate shows that transmitter’s model number, serial number, and performance data. The approval plate shows that transmitter’s approval and certification data. Always refer to these plates to confirm the model number, performance data and approval and certification data before installing or servicing a transmitter. Representative plates are shown below.

The tag plate is fastened with two screws so it can be removed for engraving.

SIEMENS

D-76181 Karlsruhe

SITRANS P

Transmitter for diff. pressure 7MF4433-1DA20-1HC6-Z A01+B11+Y01 Feb. Nr. N1-M831-9292402

VH :DC 10.5-45V (not intr. safe) outp.: 4-20 mA

Mat.: Connec. Diaphr. O-ring Filling

1.4408 1.4404 FPM Siliconoil

Measuring span : 2.5 - 250 mbar Rated pressure : PN 160

Type of protection IP 65

Made in USA

Rating Plate

1 Model number 2 Serial number

MG00384a

MG00353a

1 Rating plate 2 Approval plate 3 Tag plate

SIEMENS

D-76181 Karlsruhe

SITRANS P

(XP/DIP) or (IS) CL I ZN 0/1 AEX ia IIC T4..T6 CL I,II,II DIV 1 ABCKEFB T4..T6

Per Control Dwg. A5E00072770A

Vi < 30V : Ii < 100 mA : Pi < 0.75 W Ci < 6 nF : Li < 0.4 mH

(NI) CL 1 DIV 2 ABCD T4..T6 CL II DIV 2 GP FB, CL III

Vmax = 30 V

Ta - T4: - 40..85ºC ; T6: -40..60ºC ENCL T ype 4X FW: 11.02.03 HW: 02.05.01

Approval Plate

APPROVED

MG00384a

1.4 CONFIGURATION

A transmitter must be configured before use. Each transmitter is shipped with either a default configuration or, if specified at time of order, a custom configuration defined by the user. The default configuration may need to be edited before the transmitter is used in a loop. The configuration is stored within the transmitter in a non-volatile memory.

A configuration can be created or edited locally at the transmitter’s magnetic pushbuttons or remotely using the Model 275 HART Communicator.

Note: If using a Model 375 Field Communicator, see the inside of the front cover of this manual.

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UMSITRPDS3-1 Model 275 Universal Hart Communicator

2.0 MODEL 275 UNIVERSAL HART COMMUNICATOR

The Model 275 Universal HART Communicator is a handheld interface that provides a common communication link to SITRANS P transmitters and other HART-compatible instruments.

This section describes HART Communicator connections, liquid crystal display, keypad, and on-line and off-line menus. It also provides overviews of many Communicator functions. The Communicator is shown in Figure 2-1. For information about the Communicator’s battery pack, Memory Module, Data Pack, and maintenance procedures, refer to the manual supplied with the Communicator.

2.1 INTRODUCTION

The HART Communicator connects to and communicates with a transmitter or other HART device using a 4-20 mA loop, provided a minimum load resistance of 250Ω is present between the Communicator and the power supply. The Communicator uses Bell 202 frequency-shift keying (FSK) to impose highfrequency digital signals on a standard 4-20 mA current loop. Because no net energy is added to the loop, HART communication does not disturb the 4-20 mA signal.

The Communicator can be used in hazardous and non-hazardous locations.

WARNING

Explosion can cause death or serious injury.

Before connecting the HART Communicator in an explosive atmosphere, be sure that the instruments in the loop are installed in accordance with intrinsically safe or non-incendive field wiring practices.

Refer to the Communicator nameplate and the supplied manual for certifications and approvals before connecting, or making a connection to the serial port or NiCad charger port on the Communicator.

2.2 COMMUNICATOR CONNECTIONS

The Communicator can interface with a transmitter from the control room, the instrument site, or any wiring termination point in the loop. Connections are made through a supplied 40" (1m) cable (dual banana plug to mini-hook test clips). The connection panel also may have a jack for the optional NiCad charger, and it has a serial port for a future connection to a personal computer (PC).

To interface with a transmitter or other HART device, connect the HART Communicator in parallel with the instrument or load resistor. The connections are non-polar. For intrinsically safe FM and CSA wiring connections, see the manual supplied with the Communicator.

Figure 2-2 illustrates typical wiring connections between the HART Communicator and a loop with a transmitter or other HART-compatible device in a loop. The Communicator is quickly connected into a transmitter loop.

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Model 275 Universal Hart Communicator UMSITRPDS3-1

F1 F2 F3 F4

HART Communicator

MG00360a

A B C D E F G H I

J K L

M N O P Q R

V W X Y Z /

S T U

# % &

< >

Model 275 Universal HART Communicator

Liquid Crystal Display (LCD), 8 lines, 21 characters per line

Function Keys (softkeys), software defined

Action Keys – ON/OFF (I/O), Up Arrow, Quick Access Key (>>>), Previous Menu (Back, left arrow),

Down Arrow, Select (Forward, right arrow) Alphanumeric Keys (keypad number sequence may be different from that shown)

Shift Keys – Use to select alphabetic and other characters above a number, period, or dash.

Communicator Nameplate – On back of device. See nameplate for certifications and approvals

before connecting in a hazardous location. Communicator model number and serial number on back

Connection panel.

Non-polar loop connection; dual banana plug

Serial port for PC connection; DB9

NiCad Charger Jack, optional

FIGURE 2-1 Model 275 Universal HART Communicator

Note: If using a Model 375 Field Communicator, see the inside of the front cover of this manual.

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UMSITRPDS3-1 Model 275 Universal Hart Communicator

Range Resistor 250, typical

Controller, Recorder, or Other 1-5 Vdc Device; See Note 2

Current Sense Resistor 250 to 1100; See Note 3

See Note 1

Circuit Junction

MG00359a

Non-Hazardous

Location

Hazardous

Location

Transmitter Terminals

- +

4-20 mA

See Note 4

IOI

See

Note 1

Notes:

1 HART Communicator Connections:

Non-hazardous location – Connect as shown above. Hazardous location – Refer to Communicator nameplate and the manual supplied with the Communicator for certifications and approvals before connecting.

The HART Communicator is a non-polar device. 2 The System Power Supply may be part of the host input device or a separate device. 3 Network resistance equals the sum of the barrier resistances and the current sense resistor.

Minimum value is 250; maximum value is 1100. 4 Supply and return barriers are shown. Interconnect all cable shields and ground only at the barriers.

FIGURE 2-2 HART Communicator Connections to a Transmitter Loop

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Model 275 Universal Hart Communicator UMSITRPDS3-1

2.3 CONTROLS OVERVIEW

As shown in Figure 2-1, the front of the HART Communicator has five major functional areas: liquid crystal display (LCD), function keys, action keys, alphanumeric keys, and shift keys. The next five sections describe how each of these functional areas is used to enter commands and display data.

2.3.1 Liquid Crystal Display

The liquid crystal display (LCD) is an 8-line by 21-character display that provides communication between the user and a connected device. When the HART Communicator is connected to a SITRANS P transmitter or other HART-compatible device, the top line of the Online menu displays the model name of the device and its tag. A typical display is shown below. The actual display content can vary with the device type and manufacturer.

SITRANS P Online 

1->Pres 2 Type 3 Device setup

HELP |SAVE

Note: If using a Model 375 Field Communicator, see the inside of the front cover of this manual.

The bottom line of each menu is reserved for dynamic labels for the software-defined function keys, F1F4, which are found directly below the display. More information on software-defined function keys is given in the next section.

2.3.2 Software-Defined Function Keys

The four software-defined function keys (softkeys), located below the LCD and marked F1 through F4, are used to perform software functions as indicated by the dynamic labels. Pressing the function key immediately beneath a label activates the displayed function.

The label appearing above a function key indicates the function of that key for the current menu

. For example, in menus providing access to on-line help, the HELP label appears above the F1 key. In menus providing access to the Online menu, the HOME label appears above the F3 key. Table 2-1 lists these labels and describes what happens when each function key is pressed.

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UMSITRPDS3-1 Model 275 Universal Hart Communicator

TABLE 2-1 Function Keys with Their Labels and Actions Performed

F1 F2 F3 F4

HELP

Access on-line help

RETRY

Try to reestablish

communication

EXIT

Leave the current menu

YES

Answer to yes/no

question

ALL

Include current Quick

Access Key item on

Quick Access Key

menu for all devices

ON/OFF

Activate or deactivate a

bit-enumerated binary

variable

DEL

Delete current

character or Quick

Access Key menu item

SEND

Send configuration

data to device

PGUP

Move up one help

screen PREV

Go to previous

message in a list of

messages

ABORT

Terminate current task

ESC

Leave a value

unchanged

QUIT

Terminate session

because of a

communication error

PGDN

Move down one help

screen

Go to next message in

a list of messages

Acknowledge

information on the

LCD

ENTER

Accept user-entered

data

EXIT

Leave the current menu

Answer to yes/no

question

ONE

Include Quick Access

Key item for one

device

Go to the next variable

in off-line edit

FILTR

Open customization

menu to sort

configurations

XPAND

CMPRS

SAVE

Save information to

Communicator

MARK

Toggle marked

variable in

configuration to be sent

to a field device

Opens detailed

configuration

information

Closes detailed

configuration

information

HOME

Go the top menu in the

device description

BACK

Go back to the menu

from which HOME

was pressed

EDIT

Edit a variable value

ADD

Add current item to

Quick Access Key

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Model 275 Universal Hart Communicator UMSITRPDS3-1

2.3.3 Action Keys

Directly beneath the LCD and software-defined function keys are six blue, white, and black action keys. Each has a specific function as described below:

ON/OFF KEY – Use to power-up the Communicator. When the Communicator is turned on, it automatically searches for a HART-compatible device on the 4-20 mA loop. If no device is

found, the Communicator displays the Main menu:

If a SITRANS P transmitter is found, the Communicator displays the Online menu:

UP ARROW KEY – Use to move the cursor up through a menu or list of options or to scroll through lists of available characters when editing fields that accept both alpha and numeric data.

DOWN ARROW KEY – Use to move the cursor through a menu or a list of options or to scroll through lists of available characters when editing fields that accept alpha and numeric data.

LEFT ARROW/PREVIOUS MENU KEY – Use to move the cursor to the left or back to the previous menu.

HART Communicator 1Offline 2 Online 3 Frequency device 4 Utility

SITRANS P Online  1Pres

2 Type 3 Device setup

HELP |SAVE

RIGHT ARROW/SELECT KEY – Use to move the cursor to the right or to select a menu option.

QUICK ACCESS KEY (HOT KEY) – When the Communicator is on and connected to a HART-compatible device, pressing the Quick Access Key instantly displays the Quick Access

Key menu of user-defined options. When the Communicator is off and the Quick Access Key

is pressed, the Communicator automatically powers-up and displays the Quick Access Key menu.

See Section 2.6 for more information on using the Quick Access Key.

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UMSITRPDS3-1 Model 275 Universal Hart Communicator

Important

When performing certain operations, the message “OFF KEY DISABLED” indicates that the Communicator cannot be turned off. This feature helps prevent accidental shutoff of the Communicator while the output of a device is fixed or a device variable is being edited.

2.3.4 Alphanumeric and Shift Keys

The alphanumeric keys perform two functions: (1) rapid selection of menu options and (2) data entry. The shift keys located below the alphanumeric keys on the keypad are used during data entry to select from among the characters available above each number.

2.3.4.1 Rapid Selection of Menu Options

From any menu, use the keypad to select available options in two ways. First, use the UP or DOWN arrow keys, followed by the RIGHT ARROW/SELECT key, to access available options displayed on the LCD.

As an alternative, use the rapid select feature. Simply press the number on the alphanumeric keypad that corresponds to the desired menu option. For example, to quickly access the Utility menu from the Main menu, simply press “4” on the keypad.

2.3.4.2 Data Entry

Some menus require data entry. Use the alphanumeric and shift keys to enter all alphanumeric information into the HART Communicator. Pressing an alphanumeric key alone while editing causes the large character in the center of the key (number 0-9, decimal point, or dash) to be entered.

Pressing and releasing a shift key activates shift and causes the appropriate arrow icon (, , or ) to appear in the upper right-hand corner of the LCD. When shift is activated, the indicated alpha characters or symbols are entered when the keypad is used.

Example

To enter a number, such as “7,” simply press the number key.

To enter one of the small characters appearing above the large numeral (i.e., a letter, space, or mathematical symbol), first press and release

the corresponding shift key at the bottom of the keypad, then press the desired alphanumeric key. To enter the letter “E,” press and release the middle shift key, then press the number “2” key.

To deactivate a shift key without entering a letter, space, or mathematical symbol, simply press that shift key again.

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Model 275 Universal Hart Communicator UMSITRPDS3-1

2.4 GETTING TO KNOW THE COMMUNICATOR

The HART Communicator operates either on-line or off-line. Off-line operation is used to create or edit a configuration that can then be downloaded to a HART device, such as a transmitter. On-line operation is used to download a configuration to a HART device, upload a configuration, edit HART device operating parameters, and monitor process values.

For off-line operation, the Communicator need not be connected to a HART device. On-line operation requires a connection to a powered HART device.

The menu that appears first when the Communicator is turned on depends on whether the Communicator is connected to a powered HART device.

• Communicator not connected - Main menu (off-line operation)

• Communicator connected - Online menu (on-line operation)

To work off-line when connected to a powered loop, access the Main menu from the Online menu by pressing the LEFT ARROW/PREVIOUS MENU key.

Note

Communicator internal operation is controlled by firmware. Consequently, operation will depend upon the firmware version and the installed device drivers, as discussed in this section.

2.4.1 Display Icons

Several different symbols (icons) appear on the LCD to show the state of the Communicator and provide visible response to actions of the user. Figure 2-3 shows the display icons and how they relate to keypad functions.

HART Communication ( indicates connected device is configured in the burst mode)

ccess Additional

Menu Items

HART Communicator

Device Info 2 Dev Type

3 Dev ID 0 4 Tag 5 MM/DD/YY 10/10/10

6 Write Protect Yes

Low Battery

Access Previous Menu

X03034S1

FIGURE 2-3 HART Communicator Display Icons

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UMSITRPDS3-1 Model 275 Universal Hart Communicator

2.4.2 Menu Structure

The HART Communicator uses a hierarchical menu structure. That is, high-level menus are accessed first, and they provide access to lower-level menus. This structure groups related functions together and minimizes the number of options displayed at once.

To become familiar with the menu structure, perform the following actions:

1. With the Communicator off-line (not attached

to any devices), press the ON/OFF key to turn the Communicator on. The Communicator will perform a self-test routine and display the firmware revision level installed in the Communicator. It will then display a “Polling?” query. Press NO (F4) to go to the Main menu.

2. The cursor () will be positioned at “1 Offline” on the Main menu. Access the Utility menu by pressing the DOWN arrow key three times, then pressing the RIGHT ARROW/SELECT key. The display changes to show the Utility menu.

3. Access the Configure Communicator menu from the Utility menu by pressing the RIGHT ARROW/SELECT key. The display changes to show the Configure Communicator menu.

4. Access the Contrast menu by pressing the DOWN arrow once, then pressing the RIGHT ARROW/SELECT key. The display shows a message explaining how to adjust the LCD contrast.

5. Press ESC (F3) to return to the Configure Communicator menu.

6. Press the LEFT ARROW/PREVIOUS MENU key two times to return to the Main menu.

7. Press the ON/OFF key to turn the Communicator off.

2.4.3 Reviewing Installed Devices

For the HART Communicator to recognize a specific HART-compatible device, it must contain a description for that device. Communicator device descriptions for Moore and Siemens products are listed in Table 2-2. Device descriptions for many other HART-compatible devices from leading manufacturers are included but not listed in the table.

Communicator firmware also contains a “generic” device description, which allows limited access to most HART devices when no device description for that specific product is included.

To review the currently installed device descriptions:

1. Turn on the Communicator (off-line) to display the Main Menu.

2. In the Main menu, press “4 Utility” on the keypad.

3. In the Utility menu, press “5 Simulation” on the keypad. The LCD shows the Manufacturer menu, which contains a list of manufacturers whose device descriptions are installed in the Communicator.

4. Press the DOWN arrow to highlight SIEMENS (or other manufacturer). Press the RIGHT ARROW/SELECT key to reveal the Model menu, which lists the device descriptions currently installed in the Communicator (see Table 2-2).

5. To end the review of devices, press the LEFT ARROW/PREVIOUS MENU key three times.

6. Turn off the Communicator or proceed to the next section.

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