Honeywell SmartLine ST700 User manual

Honeywell Process Solutions
ST 700
SmartLine Pressure Transmitters
User’s Manual
34-ST-25-44
Revision 2.0
May 2013

Page ii ST 700 SmartLine Pressure Transmitters User’s Manual Revision 2.0

Revision 2.0 ST 700 Smart Pressure Transmitter User’s Manual Page iii
Copyrights, Notices and Trademarks
© Copyright 2013 by Honeywell, Inc.
Revision 2, May 2013
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
1860 Rose Garden Lane
Phoenix, AZ 85027

Page iv ST 700 SmartLine Pressure Transmitters User’s Manual Revision 2.0
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. 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 number 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 number (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 1.0, February, 2013
Revision 2.0, May, 2013 – Updates to Parts list, Explosionproof Seal class, Fail Safe and Comms
Module procedures.
References
The following list identifies publications that may contain information relevant to the information
in this document.
SmartLine Pressure Transmitter Quick Start Installation Guide, Document # 34-ST-25-36
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

Revision 2.0 ST 700 Smart Pressure Transmitter User’s Manual Page v
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.automationccollege.com
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 [email protected]

Page vi ST 700 SmartLine Pressure Transmitters User’s Manual Revision 2.0
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

Revision 2.0 ST 700 Smart Pressure Transmitter User’s Manual Page vii
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").

Page viii ST 700 SmartLine Pressure Transmitters User’s Manual Revision 2.0
Contents
1Introduction.................................................................................................................................... 1
1.1 Overview................................................................................................................................ 1
1.2 Features and Options.............................................................................................................. 1
1.2.1 Physical Characteristics ................................................................................................. 1
1.2.2 Functional Characteristics.............................................................................................. 2
1.3 ST 700 Transmitter Nameplate .............................................................................................. 3
1.4 Safety Certification Information ............................................................................................ 3
1.5 Transmitter Adjustments........................................................................................................ 3
1.6 Display Options ..................................................................................................................... 4
1.7 Optional 3-Button Assembly ................................................................................................. 4
2Application Design ........................................................................................................................ 5
2.1 Overview................................................................................................................................ 5
2.1.1 Accuracy ........................................................................................................................ 5
2.1.2 Diagnostic Messages...................................................................................................... 5
2.2 Safety ..................................................................................................................................... 6
2.2.1 Safety Integrity Level (SIL)........................................................................................... 6
3Installation and Startup .................................................................................................................. 7
3.1 Installation Site Evaluation .................................................................................................... 7
3.2 Honeywell MC Toolkit .......................................................................................................... 7
3.3 Display Installation Precautions............................................................................................. 7
3.4 Mounting ST 700 SmartLine Pressure Transmitters.............................................................. 8
3.4.1 Summary ........................................................................................................................ 8
3.4.2 Mounting Dimensions
.................................................................................................... 8
3.4.3 Bracket Mounting Procedure ......................................................................................... 9
3.4.4 Mounting Transmitters with Small Absolute or Differential Pressure Spans.............. 11
3.4.5 Flange Mounting.......................................................................................................... 12
3.4.6 Remote Diaphragm Seal Mounting Information.......................................................... 13
3.5 Piping the ST 700 Transmitter............................................................................................. 14
3.5.1 Piping Arrangements.................................................................................................... 14
3.5.2 Suggestions for Transmitter Location.......................................................................... 15
3.5.3 General Piping Guidelines ........................................................................................... 15
3.5.4 Procedure to Install Flange Adapters ........................................................................... 15
3.6 Wiring a Transmitter............................................................................................................ 16
3.6.1 Overview...................................................................................................................... 16
3.6.2 Digital System Integration Information ....................................................................... 18
3.6.3 Wiring Variations......................................................................................................... 18
3.6.4 Wiring Procedure ......................................................................................................... 18
3.6.5 Lightning Protection .................................................................................................... 18
3.6.6 Supply Voltage Limiting Requirements....................................................................... 18
3.6.7 Process Sealing ............................................................................................................ 19
3.6.8 Explosion-Proof Conduit Seal ..................................................................................... 19
3.7 Startup .................................................................................................................................. 19
3.7.1 Overview...................................................................................................................... 19
3.7.2 Startup Tasks................................................................................................................ 19
3.7.3 Output Check Procedures............................................................................................. 20
3.7.4 Constant Current Source Mode Procedure
................................................................... 20

Revision 2.0 ST 700 Smart Pressure Transmitter User’s Manual Page ix
4Operation ...................................................................................................................................... 22
4.1 Overview .............................................................................................................................. 22
4.2 Three-Button Operation........................................................................................................ 22
4.2.1 The Basic Display Menu .............................................................................................. 23
4.2.2 Data Entry..................................................................................................................... 27
4.2.3 Editing a Numeric value...............................................................................................27
4.2.4 Selecting a new setting from a list of choices .............................................................. 27
4.3 Three Button Operation with no Display Installed............................................................... 28
4.3.1 Zero Adjustment........................................................................................................... 28
4.3.2 Span Adjustment .......................................................................................................... 28
4.4 Changing the Default Failsafe Direction .............................................................................. 28
4.4.1 DE and Analog Differences.......................................................................................... 28
4.4.2 Procedure to Establish Failsafe Operation.................................................................... 29
4.5 Monitoring the Basic Display............................................................................................... 32
4.5.1 Basic Display................................................................................................................ 32
5Maintenance ................................................................................................................................. 33
5.1 Overview .............................................................................................................................. 33
5.2 Preventive Maintenance Practices and Schedules ................................................................ 33
5.3 Inspecting and Cleaning Barrier Diaphragms ......................................................................33
5.4 Replacing the Communication Module................................................................................ 36
5.5 Replacing the Meter Body.................................................................................................... 38
6Calibration .................................................................................................................................... 42
6.1 Recommendations for Transmitter Calibration .................................................................... 42
6.2 Calibration Procedures ......................................................................................................... 42
7Troubleshooting............................................................................................................................ 43
7.1 Overview .............................................................................................................................. 43
7.2 Critical Diagnostics Screens................................................................................................. 43
7.2.1 Fault Conditions and Recommended Corrective Actions ............................................43
8Parts List....................................................................................................................................... 44
8Parts List....................................................................................................................................... 44
8.1 Overview .............................................................................................................................. 44
Appendix A. PRODUCT CERTIFICATIONS .................................................................................... 56
Index..................................................................................................................................................... 68

Page x ST 700 SmartLine Pressure Transmitters User’s Manual Revision 2.0
List of Figures
Figure 1 – ST 700 Major Assemblies .................................................................................................... 2
Figure 2 – Electronics Housing Components ........................................................................................ 2
Figure 3 –Typical ST 700 Name Plate................................................................................................... 3
Figure 4 – Typical Bracket Mounted and Flange Mounted Installations............................................... 8
Figure 5 – Angle Mounting Bracket Secured to a Horizontal or Vertical Pipe ..................................... 9
Figure 6 – Inline Model Mounted to an Optional Bracket................................................................... 10
Figure 7 – Rotating the Electronics Housing ....................................................................................... 10
Figure 8 – Using a Spirit Balance to Level a Transmitter.................................................................... 11
Figure 9 – Tank-Flange Mounted Transmitter..................................................................................... 12
Figure 10 – Representative Remote Diaphragm Seal Transmitter Installation.................................... 13
Figure 11 – Typical 3-Valve Manifold with Blow-Down Piping ........................................................ 14
Figure 12 – Flange Adapter Removal and Replacement ..................................................................... 16
Figure 13 – Transmitter Operating Ranges.......................................................................................... 16
Figure 14 – Transmitter 3-Screw Terminal Board and Grounding Screw........................................... 17
Figure 15 – Current Loop Test Connections........................................................................................ 20
Figure 16 – Three-Button Option......................................................................................................... 22
Figure 17 – Locating the Failsafe and Write Protect Jumpers ............................................................. 29
Figure 18 – Basic Display with Process Variable Format ................................................................... 32
Figure 19 – DP Transmitter Head Disassembly................................................................................... 34
Figure 20 – Head Bolt Tightening Sequence ....................................................................................... 35
Figure 21 – PWA Replacement ........................................................................................................... 36
Figure 22 – Disassembly for Meter Body Replacement ...................................................................... 38
Figure 23 – Hardware Location to Remove the Meter Assembly ....................................................... 39
Figure 24 – Meter Body Reassembly................................................................................................... 40
Figure 25 – Head Bolt Tightening Sequence ....................................................................................... 40
Figure 26 – Angle and Flat Bracket Parts............................................................................................ 45
Figure 27 – Electronic Housing, Display End ..................................................................................... 47
Figure 28 – Electronic Housing, Terminal Block End......................................................................... 48
Figure 29 – Transmitter Major Assemblies ......................................................................................... 49
Figure 30 - ST 700 Models STD710, 720, 730, & 770........................................................................ 51
Figure 31 – STG730, 740, 770, and STA722, 740 Transmitter Body (Ref.)....................................... 53
Figure 32 – Inline Gauge and Inline Atmospheric Meter Body Bodies............................................... 53

Revision 2.0 ST 700 Smart Pressure Transmitter User’s Manual Page xi
List of Tables
Table 1 – Features and Options .............................................................................................................. 1
Table 2 – Available Display Characteristics .......................................................................................... 4
Table 3 – ST 700 Standard Diagnostics Messages................................................................................. 5
Table 4 - Mounting Bracket procedure..................................................................................................... 9
Table 5 – Flange Mounting Guidelines ................................................................................................ 13
Table 6 – Remote Diaphragm Mounting Details..................................................................................13
Table 7 – Suggested Connection Locations ......................................................................................... 15
Table 8 – Three-Button Option Functions............................................................................................ 23
Table 9 – The Basic Display Menus..................................................................................................... 23
Table 10 – Three-Button Data Entry .................................................................................................... 27
Table 11 – Hart and DE Failsafe and Write Protect Jumpers...............................................................30
Table 12 – Fieldbus Simulation and Write Protect Jumpers ................................................................ 30
Table 13 – Head Bolt Torque Values ................................................................................................... 35
Table 14 – Fault Conditions and Recommended Corrective Actions. ................................................. 43
Table 15 – Summary List of Recommended Spare Parts ..................................................................... 44
Table 16 – Angle and Flat Bracket Parts.............................................................................................. 46
Table 17 – Transmitter Major Assemblies ........................................................................................... 47
Table 18 – ST 700 Models STD710, 720, 730, 770 & STG774 (Ref. Figure 29) ..............................50
Table 19 - I Parts for STG730, 740, 770 and STA722, 740 Transmitter Body.................................... 52
Table 20 - Inline Gauge and Inline Atmospheric Meter Body Parts .................................................... 53
Table 21 – Flange-Mounted Meter Body Parts (Ref Figure 32) .......................................................... 54

Page xii ST 700 SmartLine Pressure Transmitters User’s Manual Revision 2.0

Page iii ST 800 SmartLine Pressure Transmitters User’s Manual Revision 1.0
1 Introduction
1.1 Overview
This section is an introduction to the physical and functional characteristics Honeywell’s family of
ST 700 SmartLine Pressure Transmitters.
1.2 Features and Options
The ST 700 SmartLine Pressure Transmitter is available in a variety of models for measuring
Differential Pressure (DP), Gauge Pressure (GP), and Absolute Pressure (AP). Table 1 lists the
protocols, human interface (HMI), materials, approvals, and mounting bracket options for the ST 700.
Table 1 – Features and Options
Feature/Option Standard/Available Options
Communication Protocols HART version 7, Digitally Enhanced (DE), Fieldbus
Human-Machine Interface (HMI)
Options (Basic Display) Basic Digital Display
Three-button programming (optional)
Basic display language: English only
Calibration Single
Approvals (See Appendix C for details.) ATEX, CSA, FM, IECx, NEPSI
Mounting Brackets Angle/flat carbon steel/304 and 316 stainless steel, Marine
304 stainless steel
Integration Tools Experion
1.2.1 Physical Characteristics
As shown in Figure 1, the ST 700 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.

Page 72 ST 700 SmartLine Pressure Transmitters User’s Manual Revision 1.0
Figure 1 – ST 700 Major Assemblies
Figure 2 – Electronics Housing Components
1.2.2 Functional Characteristics
Functionally, the Transmitter can measure process pressure and provides a proportional analog 4 to
20 mA output to the measured process variable (PV). Available output communication protocols
include Honeywell Digitally Enhanced (DE), HART, and FOUNDATION Fieldbus.
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.

Revision 2.0 ST 700 Smart Pressure Transmitter User’s Manual Page 3
1.3 ST 700 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 3 is 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. However, the DP provides one additional entry (7 vs. 6) in
the Meter Body Selections (Table I) to accommodate the static pressure rating.
Figure 3 –Typical ST 700 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.
1.4 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 Appendix C of this document for safety certification
requirements and details.
1.5 Transmitter Adjustments
Zero and Span adjustments are possible in ST 700 SmartLine Pressure Transmitters with the optional
three-button assembly located at the top of the Electronic Housing (see Figure 2).
You can also use the Honeywell MC Toolkit or other third-party hand-held zero to make any
adjustments to an ST 700 SmartLine Pressure 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.

Page 72 ST 700 SmartLine Pressure Transmitters User’s Manual Revision 1.0
1.6 Display Options
The ST 700 SmartLine Pressure Transmitter with Basic Display.
Table 2 – 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
1.7 Optional 3-Button Assembly
The optional 3-Button Assembly provides the following features and capabilities:
•Increment, decrement, and enter key functions.
•With the menu-driven display:
oComprehensive on-screen menu for navigation.
oTransmitter configuration.
oTransmitter calibration
oDisplay configuration.
oSet zero and span parameters.

Revision 2.0 ST 700 Smart Pressure Transmitter User’s Manual Page 5
2 Application Design
2.1 Overview
This section discusses the considerations involved with deploying a Honeywell ST 700 SmartLine
Pressure Transmitter in a process system. The following areas are covered:
•Safety
•Input and output data
•Reliability
•Environmental limits
•Installation considerations
•Operation and maintenance\
•Repair and replacement
2.1.1 Accuracy
The ST 700 SmartLine Pressure Transmitter (Transmitter) measures the gauge, differential, or
absolute pressure of a process and reports the measurement to a receiving device. Measurements are
accurate up to 0.05 of the calibrated span.
2.1.2 Diagnostic Messages
Transmitter standard diagnostics are reported in the two basic categories listed in Table 3. Problems
detected as critical diagnostics drive the analog output to the programmed burnout level. Problems
detected as non-critical diagnostics may affect performance without driving the analog output to the
programmed burnout level. Informational messages (not listed in Table 3) report various Transmitter
status or setting conditions. The messages listed in Table 3 are specific to the Transmitter, exclusive
of those associated with HART and DE protocols. HART and DE diagnostic messages are listed and
described in the ST 700 SmartLine Pressure Transmitter HART/DE Option User Manual, document
number 34-ST-25-47.
Table 3 – ST 700 Standard Diagnostics Messages
Critical Diagnostics
(Failure Conditions) Non-Critical Diagnostics (Warning Conditions)
Sensor Comm Timeout
Meter Body Critical Failure
Electronic Module Diag Failure
Config Data Corrupt
Meter Body NVM Corrupt
Electronic Module DAC Failure
No DAC Compensation
No Factory Calibration
PV Out of Range
Fixed Current Mode
Sensor Over Temperature
Meter Body Excess Correct
No DAC Compensation
No Factory Calibration
Local Display
Low Supply Voltage
No DAC Calibration
Tamper Alarm
Meter Body Unreliable Comm
Loop Current Noise
AO Out of Range
URV Set Error – Span Config
Button
LRV Set Error – Span Config
Button

Page 72 ST 700 SmartLine Pressure Transmitters User’s Manual Revision 1.0
2.2 Safety
2.2.1 Safety Integrity Level (SIL)
The ST 700 is intended to achieve sufficient integrity against systematic errors by the manufacturer’s
design. A Safety Instrumented Function (SIF) designed with this product must not be used at a SIL
level higher than the statement, without “prior use” justification by the end user or diverse technology
redundancy in the design. Refer to the Honeywell SmartLine Safety Manual, 34-ST-25-37, for
additional information.

Revision 2.0 ST 700 Smart Pressure Transmitter User’s Manual Page 7
3 Installation and Startup
3.1 Installation Site Evaluation
Evaluate the site selected for the ST 700 Transmitter installation with respect to the process system
design specifications and Honeywell’s published performance characteristics for your particular
model. Some parameters that you may want to include in your site evaluation are:
•Environmental Conditions:
oAmbient Temperature
oRelative Humidity
•Potential Noise Sources:
oRadio Frequency Interference (RFI)
oElectromagnetic Interference (EMI)
•Vibration Sources
oPumps
oMotorized System Devices (e.g., pumps)
oValve Cavitation
•Process Parameters
oTemperature
oMaximum Pressure Rating
3.2 Honeywell MC Toolkit
In preparation for post-installation processes, refer to the MC Tookit User Manual, Document # 34-
ST-25-20, for battery conditioning and device operation and maintenance information.
3.3 Display Installation Precautions
Temperature extremes can affect display quality. The display can become unreadable at temperature
extremes; however, this is only a temporary condition. The display will again be readable when
temperatures return to within operable limits.
The display update rate may increase at cold temperature extremes, but as with readability, normal
updating resumes when temperatures are within limits for full operability.

Page 72 ST 700 SmartLine Pressure Transmitters User’s Manual Revision 1.0
3.4 Mounting ST 700 SmartLine Pressure Transmitters
3.4.1 Summary
Transmitter models, except flush mounts and those with integral flanges, can be attached to a two-
inch (50 millimeter) vertical or horizontal pipe using Honeywell’s optional angle or flat mounting
bracket; alternately you can use your own bracket. Flush-mount models are attached directly to a
process pipe or tank by a one-inch weld nipple. Models with integral flanges are supported by the
flange connection.
Figure 4 shows typical bracket-mounted and flange-mounted transmitter installations.
Figure 4 – Typical Bracket Mounted and Flange Mounted Installations
3.4.2 Mounting Dimensions
Refer to Honeywell drawing number 50049930 (Dual Head), 50049931 (In-Line), 50049932 (Flange
Mount) 50049933 (Extended Flange), and 50049934 (Remote Seal) for detailed dimensions.
Abbreviated overall dimensions are also shown on the Specification Sheets for the transmitter
models. This section assumes that the mounting dimensions have already been taken into account and
the mounting area can accommodate the Transmitter.