Honeywell SmartLine ST700 User manual

Honeywell Process Solutions
SmartLine Pressure Transmitters
ST 700 User’s Manual
34-ST-25-44
Revision 8.0
December 2016

Page ii ST 700 SmartLine Pressure Transmitters User’s Manual Revision 8.0
Copyrights, Notices and Trademarks
© Copyright 2016 by Honeywell, Inc.
Revision 8.0, December 2016
While the information in this document is presented in good faith and believed to be
accurate, Honeywell disclaims any implied warranties of merchantability and fitness for a
particular purpose and makes no express warranties except as may be stated in the written
agreement with and for its customers. In no event is Honeywell liable to anyone for any
indirect, special, or consequential damages. The information and specifications in this
document are subject to change without notice.
Honeywell, TDC 3000, SFC, Smartline, PlantScape, Experion PKS, and TotalPlant are
registered trademarks of Honeywell International Inc. Other brand or product names are
trademarks of their respective owners.
Honeywell Process Solutions
1250 W Sam Houston Pkwy S
Houston, TX 77042

Revision 8.0 ST 700 SmartLine Pressure Transmitters User’s Manual Page iii
About This Manual
This manual is a detailed how to reference for installing, piping, wiring, configuring, starting up,
operating, maintaining, calibrating, and servicing Honeywell’s family of ST 700 SmartLine
Pressure Transmitters, Standard and Basic models.
Users who have a Honeywell ST 700 SmartLine Pressure Transmitter configured for HART
protocol or Honeywell’s Digitally Enhanced (DE) are referred to the ST 700 Series HART/DE
Option User’s Manual, Document # 34-ST-25-47.
Users who have a Honeywell ST 700 SmartLine Pressure Transmitter configured for Fieldbus
operation are referred to the ST 700 Series Fieldbus Option User’s Manual, Document # 34-ST-
25-48.
The configuration of your Transmitter depends on the mode of operation and the options selected
for it with respect to operating controls, displays and mechanical installation. This manual
provides detailed procedures to assist first-time users, and it further includes keystroke
summaries, where appropriate, as quick reference or refreshers for experienced personnel.
To digitally integrate a Transmitter with one of the following systems:
For the Experion PKS, you will need to supplement the information in this document with the
data and procedures in the Experion Knowledge Builder.
For Honeywell’s TotalPlant Solutions (TPS), you will need to supplement the information in
this document with the data in the PM/APM SmartLine Transmitter Integration Manual,
which is supplied with the TDC 3000 book set. (TPS is the evolution of the TDC 3000).
Release Information
ST 700 SmartLine Pressure Transmitter User Manual, Document # 34-ST-25-44,
Revision 1, February, 2013
Revision 2, May, 2013 –Updates to Parts list, Explosionproof Seal class, Fail Safe and Comms
Module procedures.
Revision 3, July 2013 –Control Drawing updated to Rev.D
Revision 4, December 2013 –STG73P Flush Mount
Revision 5, December 2014 –MID and MARINE Approvals added
Revision 6, March 2016 –Standard Display added
Revision 7, May 2016 –Approval updates and EU cert.
Revision 8, December 2016 –Basic models added.

Page iv ST 700 SmartLine Pressure Transmitters User’s Manual Revision 8.0
References
The following list identifies publications that may contain information relevant to the information in
this document.
SmartLine Pressure Transmitter ST 800/ST700 Standard Quick Start Guide, Document
# 34-ST-25-36
SmartLine Pressure Transmitter ST 700 Basic Quick Start Guide, Document # 34-ST-25-57
ST 800 & ST 700 Pressure Transmitter with HART Safety Manual, # 34-ST-25-37
ST 700 SmartLine Pressure Transmitter HART/DE Option User’s Manual, Document
# 34-ST-25-47
ST 700 FF Transmitter with FOUNDATION Fieldbus Option Installation & Device Reference Guide,
Document # 34-ST-25-48
MC Tookit User Manual, for 400 or later, Document # 34-ST-25-20
PM/APM Smartline Transmitter Integration Manual, Document # PM 12-410
ST 800 & ST 700 Series Pressure, Analog, HART and DE Communications form, Honeywell drawing
50049892
Smart Field Communicator Model STS 103 Operating Guide, Document # 34-ST-11-14
Patent Notice
The Honeywell ST 700 SmartLine Pressure Transmitter family is covered by one or more of the
following U. S. Patents: 5,485,753; 5,811,690; 6,041,659; 6,055,633; 7,786,878; 8,073,098; and other
patents pending.
Support and Contact Information
For Europe, Asia Pacific, North and South America contact details, refer to the back page of this
manual or the appropriate Honeywell Solution Support web site:
Honeywell Corporate www.honeywellprocess.com
Honeywell Process Solutions www.honeywellprocess.com/pressue-transmitters/
Training Classes http://www.honeywellprocess.com/en-US/training
Telephone and Email Contacts
Area
Organization
Phone Number
United States and
Canada
Honeywell Inc.
1-800-343-0228 Customer Service
1-800-423-9883 Global Technical Support
Global Email
Support
Honeywell Process
Solutions
[e-mail]

Revision 8.0 ST 700 SmartLine Pressure Transmitters User’s Manual Page v
Symbol Descriptions and Definitions
The symbols identified and defined in the following table may appear in this document.
Symbol
Definition
ATTENTION: Identifies information that requires special consideration.
TIP: Identifies advice or hints for the user, often in terms of performing a
task.
CAUTION
Indicates a situation which, if not avoided, may result in equipment or work
(data) on the system being damaged or lost, or may result in the inability to
properly operate the process.
CAUTION: Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury. It may also be used to alert against
unsafe practices.
CAUTION symbol on the equipment refers the user to the product manual for
additional information. The symbol appears next to required information in
the manual.
WARNING: Indicates a potentially hazardous situation, which, if not avoided,
could result in serious injury or death.
WARNING symbol on the equipment refers the user to the product manual
for additional information. The symbol appears next to required information
in the manual.
WARNING, Risk of electrical shock: Potential shock hazard where
HAZARDOUS LIVE voltages greater than 30 Vrms, 42.4 Vpeak, or 60 VDC
may be accessible.
ESD HAZARD: Danger of an electro-static discharge to which equipment may
be sensitive. Observe precautions for handling electrostatic sensitive
devices.
Protective Earth (PE) terminal: Provided for connection of the protective
earth (green or green/yellow) supply system conductor.
Functional earth terminal: Used for non-safety purposes such as noise
immunity improvement. Note: This connection shall be bonded to Protective
Earth at the source of supply in accordance with national local electrical
code requirements.
Earth Ground: Functional earth connection. Note: This connection shall be
bonded to Protective Earth at the source of supply in accordance with
national and local electrical code requirements.
Chassis Ground: Identifies a connection to the chassis or frame of the
equipment shall be bonded to Protective Earth at the source of supply in
accordance with national and local electrical code requirements.
continued

Page vi ST 700 SmartLine Pressure Transmitters User’s Manual Revision 8.0
Symbol
Description
The Factory Mutual®: Approval mark means the equipment has been
rigorously tested and certified to be reliable.
The Canadian Standards mark means the equipment has been tested
and meets applicable standards for safety and/or performance.
The Ex mark means the equipment complies with the requirements of the
European standards that are harmonised with the 94/9/EC Directive
(ATEX Directive, named after the French "ATmosphere EXplosible").

Revision 8.0 ST 700 SmartLine Pressure Transmitters User’s Manual Page vii
Contents
Copyrights, Notices and Trademarks .....................................................................................................ii
1. ST 700 Transmitter Series..............................................................................................................1
1.1 Overview ................................................................................................................................1
2. Introduction to the ST 700 Standard Transmitter...........................................................................3
2.1 Features and Options..............................................................................................................3
2.1.1 Physical Characteristics..................................................................................................4
2.1.2 Functional Characteristics ..............................................................................................5
2.2 ST 700 Standard Transmitter Nameplate ...............................................................................5
2.3 Safety Certification Information.............................................................................................6
2.4 Transmitter Adjustments........................................................................................................6
2.5 Display Options –Standard Display .......................................................................................6
2.6 Optional Integrated Two-Button Assembly (Standard Display)............................................7
3. Application Design for the ST 700 Standard Transmitter.............................................................8
3.1 Overview ................................................................................................................................8
3.2 Accuracy.................................................................................................................................8
3.2.1 Diagnostic Messages ......................................................................................................8
3.3 Safety......................................................................................................................................9
3.3.1 Safety Integrity Level (SIL) ...........................................................................................9
4. Installation and Startupfor the ST 700 Standard Transmitter.......................................................10
4.1 Installation Site Evaluation...................................................................................................10
4.2 Honeywell MC Toolkit.........................................................................................................10
4.3 Display Installation Precautions...........................................................................................10
4.4 Mounting ST 700 Standard Transmitters .............................................................................11
4.4.1 Summary.......................................................................................................................11
4.4.2 Flush mounting - ST 700 Standard Transmitter...........................................................12
4.4.3 Mounting Dimensions..................................................................................................12
4.4.4 Bracket Mounting Procedure........................................................................................13
4.4.5 Mounting Transmitters with Small Absolute or Differential Pressure Spans ..............15
4.4.6 Flange Mounting ..........................................................................................................16
4.4.7 Remote Diaphragm Seal Mounting Information..........................................................17
4.5 Piping the ST 700 Standard Transmitter ..............................................................................18
4.5.1 Piping Arrangements....................................................................................................18
4.5.2 Transmitter Location....................................................................................................19
4.5.3 General Piping Guidelines............................................................................................19
4.5.4 Procedure to Install Flange Adapters............................................................................19
4.6 Wiring the ST 700 Standard Transmitter .............................................................................20
4.6.1 Overview ......................................................................................................................20
4.6.2 Digital System Integration Information........................................................................22
4.6.3 Wiring Variations.........................................................................................................22
4.6.4 Wiring Procedure..........................................................................................................22
4.6.5 Lightning Protection.....................................................................................................23
4.6.6 Supply Voltage Limiting Requirements.......................................................................23
4.6.7 Process Sealing.............................................................................................................23
4.6.8 Explosion-Proof Conduit Seal......................................................................................23
4.7 Startup –ST 700 Standard Transmitter................................................................................24
4.7.1 Overview ......................................................................................................................24
4.7.2 Startup Tasks................................................................................................................24
4.7.3 Output Check Procedures.............................................................................................24
4.7.4 Constant Current Source Mode Procedure...................................................................25

Page viii ST 700 SmartLine Pressure Transmitters User’s Manual Revision 8.0
5. Operation_ST 700 Standard Transmitter..................................................................................... 26
5.1 Overview.............................................................................................................................. 26
5.2 Three-Button Operation....................................................................................................... 26
5.2.1 The Basic Display Menu.............................................................................................. 27
5.2.2 Data Entry.................................................................................................................... 31
5.2.3 Editing a Numeric value .............................................................................................. 31
5.2.4 Selecting a new setting from a list of choices.............................................................. 31
5.3 Two-Button Operation......................................................................................................... 32
5.3.1 The Standard Display Menu ........................................................................................ 32
5.3.2 Standard Display Abbreviations: ................................................................................. 35
5.3.3 Data Entry.................................................................................................................... 36
5.3.4 Editing a Numeric value .............................................................................................. 36
5.3.5 Selecting a new setting from a list of choices.............................................................. 36
5.4 Basic and Standard Display Operations............................................................................... 37
5.4.1 Editing a Numeric value .............................................................................................. 37
5.4.2 Selecting a new setting from a list of choices.............................................................. 37
5.5 Three Button Operation with no Display Installed.............................................................. 38
5.5.1 Zero Adjustment .......................................................................................................... 38
5.5.2 Span Adjustment.......................................................................................................... 38
5.6 Changing the Default Failsafe Direction.............................................................................. 39
5.6.1 DE and Analog Differences......................................................................................... 39
5.6.2 Procedure to Establish Failsafe Operation................................................................... 39
5.7 Monitoring the Basic and Standard Displays for the ST 700 Standard Transmitter........... 42
5.7.1 Basic Display_ST 700 Standard Transmitter -............................................................. 42
5.7.2 Standard Display_ST 700 Standard Transmitter - ....................................................... 42
6. Maintenance_ST 700 Standard Transmitter................................................................................. 44
6.1 Overview.............................................................................................................................. 44
6.2 Preventive Maintenance Practices and Schedules................................................................ 44
6.3 Inspecting and Cleaning Barrier Diaphragms...................................................................... 44
6.4 Replacing the Communication Module ............................................................................... 47
6.5 Replacing the Meter Body ................................................................................................... 49
7. Calibration for the ST 700 Standard Transmitter......................................................................... 53
7.1 Recommendations for Transmitter Calibration.................................................................... 53
7.2 Calibration Procedures......................................................................................................... 53
8. Troubleshooting on the ST 700 Standard Transmitter................................................................. 54
8.1 Overview.............................................................................................................................. 54
8.2 Critical Diagnostics Screens ................................................................................................ 54
8.2.1 Fault Conditions and Recommended Corrective Actions –Basic Display.................. 54
8.2.2 Fault Conditions and Recommended Corrective Actions –Standard Display ........... 55
9. Parts List_ST 700 Standard Transmitter...................................................................................... 56
9.1 Overview.............................................................................................................................. 56

Revision 8.0 ST 700 SmartLine Pressure Transmitters User’s Manual Page ix
10. Introduction_ST 700 Basic Transmitter...................................................................................71
10.1 Overview ..............................................................................................................................71
10.2 Features and Options............................................................................................................71
10.2.1 Physical Characteristics................................................................................................72
10.2.2 Functional Characteristics ............................................................................................73
10.3 ST 700 Transmitter Nameplate ............................................................................................73
10.4 Safety Certification Information...........................................................................................74
10.5 Transmitter Adjustments......................................................................................................74
10.6 Display Options –Standard Display .....................................................................................74
10.7 Optional Integrated two-Button Assembly (Standard Display)............................................74
11. Application Design_ST 700 Basic Transmitter........................................................................76
11.1 Overview ..............................................................................................................................76
11.2 Accuracy...............................................................................................................................76
11.2.1 Diagnostic Messages....................................................................................................76
11.3 Safety....................................................................................................................................76
11.3.1 Safety Integrity Level (SIL) .........................................................................................76
12. Installation and Startup_ST 700 Basic Transmitter..................................................................77
12.1 Installation Site Evaluation...................................................................................................77
12.2 Honeywell MC Toolkit.........................................................................................................77
12.3 Display Installation Precautions...........................................................................................77
12.4 Mounting_ST 700 Basic Transmitter...................................................................................78
12.4.1 Summary.......................................................................................................................78
12.5 Flush mounting_ST 700 Basic Transmitter..........................................................................79
12.5.1 Mounting Dimensions, ST 700 Basic Transmitter.......................................................79
12.5.2 Bracket Mounting Procedure for ST 700 Basic Transmitter,.......................................80
12.5.3 Mounting Transmitters with Small Absolute or Differential Pressure Spans ..............82
12.5.4 Flange Mounting_ST 700 Basic Transmitter ...............................................................83
12.5.5 Remote Diaphragm Seal Mounting Information_ST 700 Basic Transmitter,..............84
12.6 Piping the ST 700 Basic Transmitter....................................................................................85
12.6.1 Piping Arrangements....................................................................................................85
12.6.2 Suggestions for Transmitter Location ..........................................................................86
12.6.3 General Piping Guidelines............................................................................................86
12.6.4 Procedure to Install Flange Adapters............................................................................86
12.7 Wiring an ST 700 Basic Transmitter....................................................................................87
12.7.1 Overview ......................................................................................................................87
12.7.2 Digital System Integration Information........................................................................89
12.7.3 Wiring Variations.........................................................................................................89
12.7.4 Wiring Procedure..........................................................................................................89
12.7.5 Lightning Protection.....................................................................................................90
12.7.6 Supply Voltage Limiting Requirements.......................................................................90
12.7.7 Process Sealing.............................................................................................................90
12.7.8 Explosion-Proof Conduit Seal......................................................................................90
12.8 Startup ..................................................................................................................................91
12.8.1 Overview ......................................................................................................................91
12.8.2 Startup Tasks................................................................................................................91
12.8.3 Output Check Procedures.............................................................................................91
12.8.4 Constant Current Source Mode Procedure...................................................................92

Page x ST 700 SmartLine Pressure Transmitters User’s Manual Revision 8.0
13. Operation_ST 700 Basic Transmitter ...................................................................................... 93
13.1 Overview.............................................................................................................................. 93
13.2 External Two-Button Operation........................................................................................... 93
13.2.1 The Standard Display Menu ........................................................................................ 94
13.2.2 Standard Display Abbreviations: ................................................................................. 98
13.2.3 Data Entry.................................................................................................................... 99
13.2.4 Editing a Numeric value .............................................................................................. 99
13.2.5 Selecting a new setting from a list of choices.............................................................. 99
13.3 Two Button Operation with no Display Installed.............................................................. 100
13.3.1 Zero Adjustment ........................................................................................................ 100
13.3.2 Span Adjustment........................................................................................................ 100
13.3.3 Zero Correction.......................................................................................................... 100
13.4 Changing the Default Failsafe Direction............................................................................ 101
13.4.1 Procedure to Establish Failsafe Operation................................................................. 101
13.5 Monitoring the Standard Displays ..................................................................................... 103
13.5.1 Standard Display........................................................................................................ 103
14. Maintenance_ST 700 Basic Transmitter................................................................................ 104
14.1 Overview............................................................................................................................ 104
14.2 Preventive Maintenance Practices and Schedules.............................................................. 104
14.3 Inspecting and Cleaning Barrier Diaphragms.................................................................... 104
14.4 Replacing the Communication Module ............................................................................. 107
14.5 Replacing the Meter Body ................................................................................................. 109
15. Calibration_ST 700 Basic Transmitter .................................................................................. 113
15.1 Recommendations for Transmitter Calibration.................................................................. 113
15.2 Calibration Procedures....................................................................................................... 113
16. Troubleshooting_ST 700 Basic Transmitter.......................................................................... 114
16.1 Overview............................................................................................................................ 114
16.2 Critical Diagnostics Screens .............................................................................................. 114
16.2.1 Fault Conditions and Recommended Corrective Actions –Standard Display ......... 114
17. Parts List_ST 700 Basic Transmitter ..................................................................................... 115
17.1 Overview............................................................................................................................ 115
Appendix A - PRODUCT CERTIFICATIONS for the ST 700 Standard and Basic Transmitter 130
Glossary......................................................................................................................................... 146
INDEX........................................................................................................................................... 148

Revision 8.0 ST 700 SmartLine Pressure Transmitters User’s Manual Page xi
List of Figures
Figure 1 –ST 700 Standard Transmitter Major Assemblies..................................................................4
Figure 2 –ST 700 Standard Transmitter Electronics Housing Components..........................................4
Figure 3 –ST 700 Standard Transmitter - Typical Name Plate..............................................................5
Figure 4 –ST 700 Standard Transmitter - Typical Bracket and Flange Mounted Installations...........11
Figure 5 - ST 700 Standard Transmitter - Typical Flush Mounted Installation...................................12
Figure 6 –ST 700 Standard Transmitter - Angle Mounting Bracket Secured to a Horizontal or
Vertical Pipe.........................................................................................................................................13
Figure 7 –ST 700 Standard Transmitter - Inline Model Mounted to an Optional Bracket..................14
Figure 8 –ST 700 Standard Transmitter - Rotating the Electronics Housing......................................14
Figure 9 –ST 700 Standard Transmitter - Using a Spirit Balance to Level a Transmitter ..................15
Figure 10 –ST 700 Standard Transmitter - Tank-Flange Mounted Transmitter..................................16
Figure 11 –ST 700 Standard Transmitter - Representative Remote Diaphragm Seal Transmitter
Installation............................................................................................................................................17
Figure 12 –ST 700 Standard Transmitter - Typical 3-Valve Manifold with Blow-Down Piping.......18
Figure 13 –ST 700 Standard Transmitter - Flange Adapter Removal and Replacement....................20
Figure 14 –ST 700 Standard Transmitter - Operating Ranges............................................................21
Figure 15 –ST 700 Standard Transmitter - 3-Screw Terminal Board and Grounding Screw.............21
Figure 16 –ST 700 Standard Transmitter - Current Loop Test Connections ......................................25
Figure 17 –ST 700 Standard Transmitter - Three-Button Option .......................................................26
Figure 18 –ST 700 Standard Transmitter - Two-Button Option .........................................................32
Figure 19 –ST 700 Standard Transmitter - Locating the Failsafe and Write Protect Jumpers............40
Figure 20 –ST 700 Standard Transmitter - Basic Display with Process Variable Format..................42
Figure 21 –ST 700 Standard Transmitter - Standard Display with Process Variable Format.............43
Figure 22 –ST 700 Standard Transmitter - DP Transmitter Head Disassembly .................................45
Figure 23 –ST 700 Standard Transmitter - Head Bolt Tightening Sequence......................................46
Figure 24 –ST 700 Standard Transmitter - PWA Replacement..........................................................47
Figure 25 –ST 700 Standard Transmitter - Disassembly for Meter Body Replacement.....................49
Figure 26 –ST 700 Standard Transmitter - Hardware Location to Remove the Meter Assembly ......50
Figure 27 –ST 700 Standard Transmitter - Meter Body Reassembly .................................................51
Figure 28 –ST 700 Standard Transmitter - Head Bolt Tightening Sequence......................................51
Figure 29 –ST 700 Standard Transmitter - Angle and Flat Bracket Parts...........................................57
Figure 30 –ST 700 Standard Transmitter - Electronic Housing, Display End....................................59
Figure 31 –ST 700 Standard Transmitter - Electronic Housing, Terminal Block End .......................60
Figure 32 –ST 700 Standard Transmitter - Major Assemblies............................................................61
Figure 33 - ST 700 Standard Transmitter - ST 700 Models STD720, 730, 770 ..................................63
Figure 34 –ST 700 Standard Transmitter - STG730, 740, 770 and STA722, 740 Transmitter Body.65
Figure 35 –ST 700 Standard Transmitter - Inline Gauge and Inline Atmospheric Meter Body Bodies
..............................................................................................................................................................65
Figure 36 –ST 700 Standard Transmitter - Extended Flange Design..................................................67
Figure 37 - ST 700 Standard Transmitter - Flush Flange Design.........................................................67
Figure 38 - ST 700 Standard Transmitter - Pseudo Flange Design......................................................68
Figure 39 –ST 700 Standard Transmitter - Remote Seal Diaphragm..................................................68
Figure 40 - ST 700 Standard Transmitter - Flush Mount Meter Body.................................................69
Figure 41 –ST 700 Basic Transmitter - Major Assemblies.................................................................72
Figure 42 –ST 700 Basic transmitter Electronics Housing Components ............................................72
Figure 43 –ST 700 Basic Transmitter - Name Plate............................................................................73
Figure 44 –ST 700 Basic Transmitter - Typical Bracket Mounted and Flange Mounted Installations
..............................................................................................................................................................78
Figure 45 - ST 700 Basic Transmitter - Typical Flush Mounted Transmitter Installation...................79

Page xii ST 700 SmartLine Pressure Transmitters User’s Manual Revision 8.0
Figure 46 –ST 700 Basic Transmitter - Angle Mounting Bracket Secured to a Horizontal or Vertical
Pipe ...................................................................................................................................................... 80
Figure 47 –ST 700 Basic Transmitter - Inline Model Mounted to an Optional Bracket .................... 81
Figure 48 –ST 700 Basic Transmitter - Rotating the Electronics Housing......................................... 81
Figure 49 –ST 700 Basic Transmitter, using a Spirit Balance to Level a Transmitter ....................... 82
Figure 50 –ST 700 Basic Transmitter, Tank-Flange Mounted Transmitter........................................ 83
Figure 51 –ST 700 Basic Transmitter - Representative Remote Diaphragm Seal Transmitter
Installation............................................................................................................................................ 84
Figure 52–ST 700 Basic Transmitter - Typical 3-Valve Manifold with Blow-Down Piping............. 85
Figure 53 –ST 700 Basic Transmitter - Flange Adapter Removal and Replacement......................... 87
Figure 54 –ST 700 Basic Transmitter - Operating Ranges................................................................. 87
Figure 55 –ST 700 Basic Transmitter - 3-Screw Terminal Board and Grounding Screw.................. 88
Figure 56 –ST 700 Basic Transmitter - Current Loop Test Connections ........................................... 92
Figure 57 –ST 700 Basic Transmitter - Two-Button Option.............................................................. 93
Figure 58 –ST 700 Basic Transmitter - Two-Button Option.............................................................. 94
Figure 59 –ST 700 Basic Transmitter - Locating the Failsafe and Write Protect Jumpers............... 101
Figure 60 –ST 700 Basic Transmitter - Standard Display with Process Variable Format................ 103
Figure 61 –ST 700 Basic Transmitter - DP Transmitter Head Disassembly.................................... 105
Figure 62 –ST 700 Basic Transmitter - Head Bolt Tightening Sequence......................................... 106
Figure 63 –ST 700 Basic Transmitter - PWA Replacement............................................................. 107
Figure 64 –ST 700 Basic Transmitter - Disassembly for Meter Body Replacement........................ 109
Figure 65 –ST 700 Basic Transmitter - Hardware Location to Remove the Meter Assembly......... 110
Figure 66 –ST 700 Basic Transmitter - Meter Body Reassembly.................................................... 111
Figure 67 –ST 700 Basic Transmitter - Head Bolt Tightening Sequence......................................... 111
Figure 68 –ST 700 Basic Transmitter - Angle and Flat Bracket Parts (refer to Table 41) ............... 116
Figure 69 –ST 700 Basic Transmitter - Electronic Housing, Display End....................................... 118
Figure 70 –ST 700 Basic Transmitter - Electronic Housing, Terminal Block End.......................... 119
Figure 71 –ST 700 Basic Transmitter - Major Assemblies............................................................... 120
Figure 72 - ST 700 Basic Transmitter Models STD725, 735, 775 .................................................... 122
Figure 73 –ST 700 Basic Transmitter - STG730, 735, 740, 745, 770, 775 and STA722, 725, 745
Transmitter Body............................................................................................................................... 124
Figure 74 –ST 700 Basic Transmitter - Inline Gauge and Inline Atmospheric Meter Body Bodies 124
Figure 75 –ST 700 Basic Transmitter - Extended Flange Design .................................................... 126
Figure 76 - ST 700 Basic Transmitter - Flush Flange Design ........................................................... 126
Figure 77 - ST 700 Basic Transmitter - Pseudo Flange Design......................................................... 127
Figure 78 –ST 700 Basic Transmitter - Remote Seal Diaphragm .................................................... 127
Figure 79 - ST 700 Basic Transmitter - Series 700 Flush Mount Meter Body.................................. 128

Revision 8.0 ST 700 SmartLine Pressure Transmitters User’s Manual Page xiii
List of Tables
Table 1 –ST 700 Standard andf Basic model types...............................................................................2
Table 2 –Features and Options_ST 700 Standard transmitter...............................................................3
Table 3 –Available Display Characteristics ..........................................................................................6
Table 4 –ST 700 Standard transmitter - Basic Display Diagnostics Messages.....................................9
Table 5 - ST 700 Standard Transmitter - Mounting Bracket procedure...............................................13
Table 6 –ST 700 Standard Transmitter - Flange Mounting Guidelines ..............................................17
Table 7 –ST 700 Standard Transmitter - Remote Diaphragm Mounting Details................................17
Table 8 –ST 700 Standard Transmitter - Suggested Connection Locations........................................19
Table 9 –Three-Button Option Functions............................................................................................27
Table 10 –The Basic Display Menus...................................................................................................28
Table 11 –Three-Button Data Entry....................................................................................................31
Table 12 –The Standard Display Menus.............................................................................................33
Table 13 –The Standard Display abbreviations...................................................................................35
Table 14 –Two-Button Data Entry.......................................................................................................36
Table 15 –ST 700 Standard Transmitter - Hart and DE Failsafe and Write Protect Jumpers.............40
Table 16 –ST 700 Standard Transmitter - Fieldbus Simulation and Write Protect Jumpers...............41
Table 17 –Head Bolt Torque Values...................................................................................................46
Table 18 –ST 700 Standard Transmitter - Fault Conditions and Recommended Corrective Actions.54
Table 19 –ST 700 Standard Transmitter - Fault Conditions and Recommended Corrective Actions.55
Table 20 –ST 700 Standard Transmitter - Summary List of Recommended Spare Parts ...................56
Table 21 –ST 700 Standard Transmitter - Angle and Flat Bracket Parts............................................58
Table 22 –ST 700 Standard Transmitter Major Assemblies ...............................................................59
Table 23 –ST 700 Standard Transmitter Models STD720, 730 & 770..............................................62
Table 24 –ST 700 Standard Transmitter - Parts for STG730, 740, 770 and STA722, 740 Transmitter
Body .....................................................................................................................................................64
Table 25 - ST 700 Standard Transmitter - Inline Gauge and Inline Atmospheric Meter Body Parts ..65
Table 26 –ST 700 Standard Transmitter - Flange-Mounted Meter Body Parts –STF724, 732..........66
Table 27 –ST 700 Standard Transmitter - Flush Mount Meter Body Parts.........................................69
Table 28 –ST 700 Basic Transmitter - Features and Options..............................................................71
Table 29 –ST 700 Basic Transmitter - Available Display Characteristics..........................................74
Table 30 - ST 700 Basic Transmitter - Mounting Bracket procedure..................................................80
Table 31 –ST 700 Basic Transmitter, Flange Mounting Guidelines...................................................84
Table 32 –ST 700 Basic Transmitter - Remote Diaphragm Mounting Details...................................84
Table 33 –ST 700 Basic Transmitter - Suggested Connection Locations...........................................86
Table 34 –ST 700 Basic Transmitter: Standard Display Menus .........................................................95
Table 35 –ST 700 Basic Transmitter - Extended Display Menu.........................................................97
Table 36 –ST 700 Basic Transmitter - The Standard Display abbreviations ......................................98
Table 37 –ST 700 Basic Transmitter - Two-Button Data Entry..........................................................99
Table 38 –ST 700 Basic Transmitter - HART Failsafe and Write Protect Jumpers..........................102
Table 39 –Head Bolt Torque Values.................................................................................................106
Table 40 –ST 700 Basic Transmitter - Fault Conditions and Recommended Corrective Actions....114
Table 41 –ST 700 Basic Transmitter - Summary List of Recommended Spare Parts.......................115
Table 42 –ST 700 Basic Transmitter - Angle and Flat Bracket Parts ...............................................117
Table 43 –ST 700 Basic Transmitter - Major Assemblies ................................................................118
Table 44 –ST 700 Basic Transmitter Models STD720, 725, 730, 735, 770, 775 & STG774..........121
Table 45 –ST 700 Basic Transmitter - Parts for STG725, 735, 745, 775, 745 Transmitter Body ....123
Table 46 - ST 700 Basic Transmitter - Inline Gauge and Inline Atmospheric Meter Body Parts......124
Table 47 –ST 700 Basic Transmitter - Flange-Mounted Meter Body Parts......................................125
Table 48 –ST 700 Basic Transmitter - Flush Mount Meter Body Parts............................................128

Page xiv ST 700 SmartLine Pressure Transmitters User’s Manual Revision 8.0

Revision 8.0 ST 700 SmartLine Pressure Transmitters User’s Manual Page 1
1. ST 700 Transmitter Series
1.1 Overview
SmartLine Pressure Transmitter ST 700 family conists of a series of ST 700 Standard Transmitter
models and a series of ST 700 Basic Transmitter models.
The entire manual is broadly classified in two sections.
The first half of this manual, Sections 2through 9, are for ST 700 Standard Transmitter model series
and the second half, Sections 10 through 17, are applicable only to ST 700 Basic Transmitter model
series.
Which type of transmitter do I have?
To determine which version you have:
Look at the nameplate on top of the unit shown in Figure 3. Refer to the Model number
If you have a ST 700 Standard Transmitter use Sections 2through 9.
If you have a ST 700 Basic Transmitter go straight to Sections 10 through 17.
Appendix A - PRODUCT CERTIFICATIONS is applicable for both ST 700 Standard and Basic
Transmitters.
Table 1 below to identify which type of Transmitter you have; Standard or Basic.
The Standard transmitter will have a three button assembly (see Figure 17), the basic Transmitter with
have two button assembly (see Figure 18)
3-button Standard ST 700 Transmitter 2-button Basic ST 700 Transmitter

Page 2 ST 700 SmartLine Pressure Transmitters User’s Manual Revision 8.0
Table 1 –ST 700 Standard andf Basic model types
Transmitter
Configuration
Smart Line Pressure ST700
Standard Models
Basic Models
Dual head DP
STD720/730/770
STD725/735/775
Dual head GP
STG730/740/770
STG735/745/775
Inline GP
STG73L/74L/77L/78L/79L
STG73S/74S/77S/78S/79S
Inline flush GP
STG73P
STG73SP
Dual head AP
STA722/740
STA725/745
Inline AP
STA72L/74L/77L
STA72S/74S/77S
Flush flanged level
STF724/732
STF725/735
Pseudo flanged level
STF72F/73F
STF72P/73P
Remote seal DP/GP
STR73D/74G
STR735D/745G

Revision 8.0 ST 700 SmartLine Pressure Transmitters User’s Manual Page 3
, 2. Introduction to the ST 700 Standard Transmitter
This section is an introduction to the physical and functional characteristics Honeywell’s family of
the ST 700 Standard Transmitters.
2.1 Features and Options
The ST 700 Standard Transmitter is available in a variety of models for measuring Differential
Pressure (DP), Gauge Pressure (GP), and Absolute Pressure (AP). Table 2lists the protocols, human
interface (HMI), materials, approvals, and mounting bracket options.
Table 2 –Features and Options_ST 700 Standard transmitter
Feature/Option
Standard/Available Options
Communication Protocols
HARTversion 7, Digitally Enhanced (DE), Fieldbus
Human-Machine Interface (HMI)
Options (Basic Display/Standard
Display)
Basic Digital Display:
Three-button programming (optional)
Basic display language: English only
Standard Display (HARTonly):
Two-button programming (optional)
Standard display language: English only
Two-mode operations: PV display and Menu
Navigation
Calibration
Single
Approvals for details go to page 130
FM, CSA, ATEX, IECEx, SAEx, INMETRO, NEPSI,
GOST and MARINE
Mounting Brackets
Angle/flat carbon steel/304 and 316 stainless steel,
Marine 304 stainless steel, 316 Stainless Steel
Integration Tools
Experion
The three-button option is available for the Basic Display.
The two-button option is available for the Standard Display.
Also, for the Basic Display, the three button reed switch is used only for span &
zero correction and not for the Display navigation.

Page 4 ST 700 SmartLine Pressure Transmitters User’s Manual Revision 8.0
2.1.1 Physical Characteristics
As shown in Figure 1, the ST 700 Standard is packaged in two major assemblies: the Electronics
Housing and the Meter Body. The elements in the Electronic Housing respond to setup commands
and execute the software and protocol for the different pressure measurement types. Figure 2 shows
the assemblies in the Electronics Housing with available options.
The Meter Body provides connection to a process system. Several physical interface configurations
are available, as determined by the mounting and mechanical connections, all of which are described
in the Installation section of this manual.
Figure 1 –ST 700 Standard Transmitter Major Assemblies
Figure 2 –ST 700 Standard Transmitter Electronics Housing Components

Revision 8.0 ST 700 SmartLine Pressure Transmitters User’s Manual Page 5
2.1.2 Functional Characteristics
The ST 700 Standard Transmitter measures process pressure and provides a proportional analog
4 to 20mA output to the measured process variable (PV). Available output communication protocols
include Honeywell Digitally Enhanced (DE), HART, and FOUNDATIONTM Fieldbus.
The Standard display is only available on HART transmitters.
An optional 3-button assembly is available to set up and make adjustments to the Transmitter. In
addition, a Honeywell Multi-Communication (MC) Toolkit (not supplied with the Transmitter) can
facilitate setup and adjustment procedures. Certain adjustments can be made through an Experion
Station or a Universal Station if the Transmitter is digitally integrated with Honeywell’s Experion or
TPS/TDC 3000 control system.
The Standard Display Menu is implemented as one long single-level menu and will “wrap around”
when it reaches the start or end of the menu. The Standard Display uses an optional two-button
assembly to set up and make adjustments to the Transmitter.
2.2 ST 700 Standard Transmitter Nameplate
The Transmitter nameplate mounted on the bottom of the electronics housing (see Figure 1) lists its
model number, physical configuration, electronics options, accessories, certifications, and
manufacturing specialties. Figure 3is an example of a typical Gauge Pressure (GP) or Atmospheric
Pressure (AP) Transmitter name plate. The model number format consists of a Key Number with
several table selections. The Differential Pressure (DP), Absolute Pressure (AP), and Gauge Pressure
(GP) name plates are essentially the same. The DP model provides one additional entry (7 vs. 6) in
the Meter Body Selections (Table I) to accommodate the static pressure rating.
Figure 3 –ST 700 Standard Transmitter - Typical Name Plate
You can readily identify the series and basic Transmitter type from the third and fourth digits in the
key number. The letter in the third digit represents one of these basic transmitter types:
A = Absolute Pressure
D = Differential Pressure
F = Flange Mounted
G = Gauge Pressure
R = Remote Seals
For a complete selection breakdown, refer to the appropriate Specification and Model Selection
Guide provided as a separate document.

Page 6 ST 700 SmartLine Pressure Transmitters User’s Manual Revision 8.0
2.3 Safety Certification Information
An “approvals” name plate is located on the bottom of the Electronics Assembly; see Figure 1for
exact location. The approvals name plate contains information and service marks that disclose the
Transmitter compliance information.
Refer to Section Appendix A in this document for safety certification requirements and details.
2.4 Transmitter Adjustments
Zero and Span adjustments are possible in ST 700 Standard Transmitter with the optional 3 button
and two-button assemblies.
You can also use the Honeywell MC Toolkit or other third-party hand-held configurator to make
adjustments to the ST 700 Standard Transmitter. Alternately, certain adjustments can be made
through the Experion or Universal Station, if the Transmitter is digitally integrated with a Honeywell
Experion or TPS system.
2.5 Display Options –Standard Display
Table 3 –Available Display Characteristics
Basic Display
Suitable for basic process needs
360orotation in 90oIncrements
2 lines, 16 characters
Standard units of measurement: Pa, KPa, MPa, KGcm2, TORR, ATM, inH2O,
mH2O, bar, mbar, inHg, FTH2O, mmH2O, MMHG, & PSI
Diagnostic messaging
Square root output indications
Standard Display
360orotation in 90oIncrements
2 lines, 8 characters
Standard units of measurement: Pa, KPa, MPa, KGcm2, TORR, ATM, inH2O,
mH2O, bar, mbar, inHg, FTH2O, mmH2O, MMHG, Flow Units (DP models
only) ,PSI , cmH2O and mH2O
Diagnostic messaging