Honeywell ST 800 Series User manual

Honeywell Process Solutions
ST 800
SmartLine Pressure Transmitters
User’s Manual
34-ST-25-35
Revision 10.0
July 2016

Page ii ST 800 SmartLine Pressure Transmitters User’s Manual Revision 10
Copyrights, Notices and Trademarks
© Copyright 2016 by Honeywell, Inc.
Revision 10, July 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 10 ST 800 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 800 SmartLine
Pressure Transmitters. Users who have a Honeywell ST 800 SmartLine Pressure Transmitter
configured for HART protocol or Honeywell’s Digitally Enhanced (DE) are referred to the ST
800 Series HART/DE Option User’s Manual, document number 34-ST-25-38. Users who have a
Honeywell ST 800 SmartLine Pressure Transmitter configured for Fieldbus operation are referred
to the ST 800 Series Fieldbus Option User’s Manual, document number (34-ST-25-39).
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 800 SmartLine Pressure Transmitter User Manual, Document # 34-ST-25-35,
Rev. 1, October, 2012 –First Release
Rev. 2, January 2013 –Document # reference and meter body updates
Rev. 3, February 2013 –Parts list updates
Rev. 4, May 2013 –Updates to Parts list, Explosionproof Seal class, Fail Safe and Comms
Module procedures.
Rev. 5, July 2013 –Control Drawing updated to Rev.D
Rev. 6, Feb 2014 - Advanced display updates. Approvals FISCO & GOST added. PILD, Dual
and Triple Calibration added.
Rev.7, May 2014 –PILD, Basic Display and High Pass Frequency updates
Rev.8, July 2014 –PILD update referencing the Option upgrade instructions
Rev.9, December 2014 –MID and Marine Approvals added
Rev.10, July 2016 –DE added to voltage chart, Approval updates and EU cert.

Page iv ST 800 SmartLine Pressure Transmitters User’s Manual Revision 10
References
The following list identifies publications that may contain information relevant to the information
in this document.
ST 800 Smart Pressure Transmitter Quick Start Installation Guide, Document # 34-ST-25-36
ST 800 & ST 700 Smart Pressure Transmitter with HART Communications Options Safety
Manual, # 34-ST-25-37
ST 800 SmartLine Pressure Transmitter HART/DE Option User’s Manual, Document
# 34-ST-25-38
ST 800 FF Transmitter with FOUNDATION Fieldbus Option Installation & Device Reference
Guide, Document # 34-ST-25-39
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 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 800 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/pressure-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 10 ST 800 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 800 SmartLine Pressure Transmitters User’s Manual Revision 10
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 10 ST 800 SmartLine Pressure Transmitters User’s Manual Page vii
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 800 Transmitter Name Plate .............................................................................................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
2.2 Safety......................................................................................................................................5
2.2.1 Accuracy.........................................................................................................................5
2.2.2 Diagnostic Messages ......................................................................................................5
2.2.3 Safety Integrity Level (SIL) ...........................................................................................6
2.2.4 Plugged Impulse Line detection (PILD).........................................................................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 800 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 Flush Mounting Procedure...........................................................................................13
3.4.7 Remote Diaphragm Seal Mounting Information..........................................................14
3.5 Piping the ST 800 Transmitter .............................................................................................16
3.5.1 Piping Arrangements....................................................................................................16
3.5.2 Suggestions for Transmitter Location ..........................................................................18
3.5.3 General Piping Guidelines............................................................................................18
3.5.4 Procedure to Install Flange Adapters............................................................................18
3.6 Wiring a Transmitter ............................................................................................................20
3.6.1 Overview ......................................................................................................................20
3.6.2 Digital System Integration Information........................................................................21
3.6.3 Wiring Variations.........................................................................................................22
3.6.4 Wiring Procedure..........................................................................................................22
3.6.5 Lightning Protection.....................................................................................................22
3.6.6 Supply Voltage Limiting Requirements.......................................................................22
3.6.7 Process Sealing.............................................................................................................22
3.6.8 Explosion-Proof Conduit Seal......................................................................................22
3.7 Startup ..................................................................................................................................23
3.7.1 Overview ......................................................................................................................23
3.7.2 Startup Tasks................................................................................................................23
3.7.3 Output Check Procedures.............................................................................................23
3.7.4 Constant Current Source Mode Procedure...................................................................24

Page viii ST 800 SmartLine Pressure Transmitters User’s Manual Revision 10
4Operation...................................................................................................................................... 25
4.1 Overview.............................................................................................................................. 25
4.2 Three-Button Operation....................................................................................................... 25
4.2.1 Menu Navigation.......................................................................................................... 27
4.2.2 Data Entry.................................................................................................................... 28
4.2.3 Editing a Numeric Value.............................................................................................. 28
4.2.4 Selecting a new setting from a list of choices.............................................................. 29
4.2.5 The Advanced Display Menus..................................................................................... 29
4.2.6 The Basic Display Menu.............................................................................................. 47
4.2.7 Selecting a new setting from a list of choices.............................................................. 52
4.3 Three Button Operation with no Display Installed.............................................................. 52
4.3.1 Zero Adjustment .......................................................................................................... 52
4.3.2 Span Adjustment.......................................................................................................... 52
4.4 Changing the Default Failsafe Direction.............................................................................. 54
4.4.1 DE and Analog Differences......................................................................................... 54
4.4.2 Procedure to Establish Failsafe Operation................................................................... 54
4.5 Monitoring the Basic and Advanced Displays..................................................................... 57
4.5.1 Basic Display............................................................................................................... 57
4.5.2 Advanced Displays ...................................................................................................... 57
4.5.3 Button operation during monitoring............................................................................. 59
5Maintenance................................................................................................................................. 60
5.1 Overview.............................................................................................................................. 60
5.2 Preventive Maintenance Practices and Schedules................................................................ 60
5.3 Inspecting and Cleaning Barrier Diaphragms...................................................................... 60
5.4 Replacing the Communication Module ............................................................................... 63
5.5 Replacing the Meter Body ................................................................................................... 65
5.6 PILD Option Licensing........................................................................................................ 68
6Calibration.................................................................................................................................... 69
6.1 Recommendations for Transmitter Calibration.................................................................... 69
6.2 Calibration Procedures......................................................................................................... 69
6.2.1 Dual/Triple Cal ............................................................................................................ 69
7Troubleshooting........................................................................................................................... 71
7.1 Overview.............................................................................................................................. 71
7.2 Critical Diagnostics Screens ................................................................................................ 71
7.2.1 Fault Conditions and Recommended Corrective Actions............................................ 71
8Parts List ...................................................................................................................................... 73
8.1 Overview.............................................................................................................................. 73
Appendix A. PRODUCT CERTIFICATIONS.................................................................................... 92
A1. Safety Instrumented Systems (SIS) Installations..................................................................... 92
A2. European Directive Information (CE Mark)............................................................................ 92
A3. Hazardous Locations Certifications......................................................................................... 98
A4. Control Drawing .................................................................................................................... 102
A5. Marine Approvals .................................................................................................................. 106
A6. Measurement Instruments Directive (MID)........................................................................... 106
Glossary............................................................................................................................................. 108

Revision 10 ST 800 SmartLine Pressure Transmitters User’s Manual Page ix
List of Figures
Figure 1 –ST 800 Major Assemblies.....................................................................................................2
Figure 2 –Electronics Housing Components.........................................................................................2
Figure 3 –Typical ST 800 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 –Typical Flush and Flange Mounted Installations..............................................................13
Figure 11 –Representative Remote Diaphragm Seal Transmitter Installation....................................14
Figure 12 –Typical 3-Valve Manifold with Blow-Down Piping.........................................................16
Figure 13 –Flange Adapter Removal and Replacement......................................................................19
Figure 14 –Transmitter Operating Ranges ..........................................................................................20
Figure 15 –Transmitter 3-Screw Terminal Board and Grounding Screw ...........................................20
Figure 16 –Current Loop Test Connections........................................................................................24
Figure 17 –Three-Button Option.........................................................................................................25
Figure 18 –Locating the Failsafe and Write Protect Jumpers..............................................................55
Figure 19 –Basic Display with Process Variable Format....................................................................57
Figure 20 –Advanced Display Formats with the Process Variable.....................................................57
Figure 21 –DP Transmitter Head Disassembly...................................................................................61
Figure 22 –Head Bolt Tightening Sequence........................................................................................62
Figure 23 –PWA Replacement............................................................................................................63
Figure 24 –Disassembly for Meter Body Replacement.......................................................................65
Figure 25 –Hardware Location to Remove the Meter Assembly........................................................66
Figure 26 –Meter Body Reassembly...................................................................................................67
Figure 27 –Head Bolt Tightening Sequence........................................................................................67
Figure 28 –Local Display Fault Diagnostic Conditions......................................................................71
Figure 29 –Angle and Flat Bracket Parts.............................................................................................74
Figure 30 –Electronic Housing, Display End......................................................................................75
Figure 31 –Electronic Housing, Terminal Block End.........................................................................76
Figure 32 –Transmitter Major Assemblies..........................................................................................78
Figure 33 - ST 800 Models STD810, 820, 830, & 870........................................................................81
Figure 34 –STG830, 840, 870, and STA822, 840 Transmitter Body..................................................84
Figure 35 –Inline Gauge and Inline Atmospheric Display Bodies......................................................86
Figure 36 –Flush Mount Meter Body..................................................................................................87
Figure 37 –Extended Flange Design ...................................................................................................88
Figure 38 - Pseudo Flange design .......................................................................................................89
Figure 39 –Remote Seal Diaphragm ...................................................................................................89
Figure 40 - COPLANAR ADAPTER REPLACEMENT SEALS KIT ...............................................91

Page x ST 800 SmartLine Pressure Transmitters User’s Manual Revision 10
List of Tables
Table 1 –Features and Options.............................................................................................................. 1
Table 2 –Available Display Characteristics.......................................................................................... 4
Table 3 - ST 800 Standard Diagnostics Messages................................................................................. 5
Table 4 –Flange Mounting Guidelines................................................................................................ 14
Table 5 –Remote Diaphragm Mounting Details................................................................................. 16
Table 6 –Suggested Connection Locations......................................................................................... 18
Table 7 –Three-Button Option Functions........................................................................................... 27
Table 8 –Three-Button Data Entry...................................................................................................... 28
Table 9 –Advanced Display Main Menu Structure............................................................................. 29
Table 10 –Diagnostics Menu .............................................................................................................. 30
Table 11 –Display Setup Menus......................................................................................................... 32
Table 12 –Calibration Menus.............................................................................................................. 38
Table 13 –Transmitter Setup Menus................................................................................................... 41
Table 14 –Information Menus............................................................................................................. 47
Table 15 –The Basic Display Menus.................................................................................................. 48
Table 16 –Hart and DE Failsafe and Write Protect Jumpers.............................................................. 55
Table 17 –Fieldbus Simulation and Write Protect Jumpers................................................................ 56
Table 18 –Advanced Displays with PV Format Display Indications.................................................. 58
Table 19 –Head Bolt Torque Values................................................................................................... 62
Table 20 –Fault Conditions and Recommended Corrective Actions.................................................. 71
Table 21 –Summary List of Recommended Spare Parts .................................................................... 73
Table 22 –Angle and Flat Bracket Parts (Refer to Figure 29) ............................................................ 75
Table 23 –Transmitter Major Assemblies........................................................................................... 76
Table 24 –ST 800 Models STD810, 820, 830 & 870 (Ref. Figure 33)............................................... 80
Table 25 –Parts for STG830, 840, 870 and STA822, 840 Transmitter Body (Ref. ) ......................... 83
Table 26 –Inline Gauge and Inline Atmospheric Meter Body Parts................................................... 86
Table 27 –Flush Mount Meter Body Parts.......................................................................................... 86
Table 28 –Flange-Mounted Meter Body Parts (Refer to Figure 37 –37b)......................................... 87
Table 29 - COPLANAR ADAPTER REPLACEMENT SEALS KITS.............................................. 91

Revision 10 ST 800 Smart Pressure Transmitter User’s Manual Page 1
1 Introduction
1.1 Overview
This section is an introduction to the physical and functional characteristics Honeywell’s family of ST
800 SmartLine Pressure Transmitters.
1.2 Features and Options
The ST 800 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 800.
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 and Advanced Display)
Basic and Advanced Digital Display
Three-button programming (optional)
Basic display language: English only
Advanced display languages: English, German, French,
Italian, Spanish, Turkish, Chinese and Russian
Calibration
Single, Dual/Triple Cal
Approvals (See Appendix C for details.)
FM, CSA, ATEX, IECEx, SAEx, INMETRO, NEPSI,
GOST, MARINE and MID
Mounting Brackets
Angle/flat carbon steel/304 stainless steel, Marine 304
stainless steel, 316 Stainless Steel
Integration Tools
Experion
Configuration
Plugged Impulse Line Detection (PILD)
1.2.1 Physical Characteristics
As shown in Figure 1, the ST 800 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 2 ST 800 SmartLine Pressure Transmitters User’s Manual Revision 10
Figure 1 –ST 800 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 10 ST 800 SmartLine Pressure Transmitters User’s Manual Page 3
1.3 ST 800 Transmitter Name Plate
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 800 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 1 for
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 800 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 800 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 4 ST 800 SmartLine Pressure Transmitters User’s Manual Revision 10
1.6 Display Options
The ST 800 SmartLine Pressure Transmitter has two display options: Basic and Advanced; see Error! Reference
ource not found..
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
Supports optional 3-Button configuration and calibration
Advanced
Display
360orotation in 90oincrements
Three (3) configurable screen formats with configurable rotation timing
oLarge process variable (PV)
oPV with bar graph
oPV with trend (1-24 hours, configurable)
Eight (8) screens with 3-30 seconds rotation timing
Standard and custom engineering units
Diagnostic alerts and diagnostic messaging
Multiple language support:
oEN, FR, GE, SP, RU, IT & TK
oEN, CH (Kanji), JP
Square root output indication
Supports 3-button configuration and calibration
Supports transmitter messaging, and maintenance mode 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 10 ST 800 SmartLine Pressure Transmitters User’s Manual Page 5
2 Application Design
2.1 Overview
This section discusses the considerations involved with deploying a Honeywell ST 800 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
2.2 Safety
2.2.1 Accuracy
The ST 800 SmartLine Pressure Transmitter (Transmitter) measures the gauge, differential, or
absolute pressure of a process and reports the measurement to a receiving device.
2.2.2 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 800 SmartLine Pressure Transmitter HART/DE Option User Manual, document
number 34-ST-25-38. Table 3 - ST 800 Standard Diagnostics Messages
Critical Diagnostics (Failure
Conditions)
Non-Critical Diagnostics (Warning Conditions)
Electronic Module DAC Failure
No DAC Compensation
Loop Current Noise
Meter Body NVM Corrupt
No Factory Calibration
AO Out of Range
Config Data Corrupt
PV Out of Range
URV Set Err. Span Config
Button
Electronic Module Diag Failure
Fixed Current Mode
LRV Set Err. Zero Config
Button
Meter Body Critical Failure
Sensor Over Temperature
PILD Blockage Detected
Sensor Comm Timeout
Meter Body Excess Correct
Local Display
Low Supply Voltage
No DAC Calibration
Tamper Alarm
Meter Body Unreliable Comm

Page 6 ST 800 SmartLine Pressure Transmitters User’s Manual Revision 10
2.2.3 Safety Integrity Level (SIL)
The ST800 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 ST 800 & ST 700 Safety Manual, 34-ST-25-37, for additional
information.
2.2.4 Plugged Impulse Line detection (PILD)
STA, STD, STG, and STF800 models are offered with a PILD option which provide indication of a
plugged impulse line or process connection. When used in conjunction with a basic or advanced
display, a non-critical diagnostic indication appears on the integral display. For units without an
integral display, an indication can be seen via the host or hand held device when HART Protocol is
utilized.
This diagnostic detects clogged or plugged impulse lines. Plugged impulse line detection (PILD) is
based on statistical models which continuously compare baseline, or normal, operating noise patterns
to check for statistically significant changes when one or both (DP) impulse lines become clogged.
See Section 5.6 for details on PILD Option licensing.

Revision 10 ST 800 SmartLine Pressure Transmitters User’s Manual Page 7
3 Installation and Startup
3.1 Installation Site Evaluation
Evaluate the site selected for the ST 800 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 8 ST 800 SmartLine Pressure Transmitters User’s Manual Revision 10
3.4 Mounting ST 800 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.

Revision 10 ST 800 SmartLine Pressure Transmitters User’s Manual Page 9
3.4.3 Bracket Mounting Procedure
If you are using an optional bracket, start with Step 1. For an existing bracket, start with Step 2.
1. Refer to Figure 5. Position the bracket on a 2-inch (50.8 mm) horizontal or vertical pipe, and
install a “U” bolt around the pipe and through the holes in the bracket. Secure the bracket
with the nuts and lock washers provided.
Figure 5 –Angle Mounting Bracket Secured to a Horizontal or Vertical Pipe
2. Align the appropriate mounting holes in the Transmitter with the holes in the bracket. Use the
bolts and washers provided to secure the Transmitter to the bracket; see the following
variations.
Transmitter Type
Use Hardware
DP with double-ended process
heads and/or remote seals
Alternate mounting holes in the ends of
the heads
In-line GP and AP (STGxxL and
STAxxL)
The smaller “U” bolt provided to attach the
meter body to the bracket. See the
following example.
Dual-head GP and AP
Mounting holes in the end of the process
head.
EXAMPLE: Inline model mounted to an optional angle bracket. See Figure 6.
Horizontal Pipe
Mounting
Bracket
Nuts and
Lockwashers
Nuts and
Lockwashers
U-Bolt
U-Bolt
Mounting
Bracket
Vertical Pipe

Page 10 ST 800 SmartLine Pressure Transmitters User’s Manual Revision 10
Figure 6 –Inline Model Mounted to an Optional Bracket
3. Loosen the set screw on the outside neck of the Transmitter one (1) full turn.
4. Rotate the Electronics housing a maximum of 180oleft or right from the center to the position
you require, and tighten the set screw 8.9 to 9.7 pound-inches (1.40 to 1.68 Newton meters),
using a 4mm metric socket head wrench. See the following example and Figure 7.
EXAMPLE: Rotating the Electronics Housing
Figure 7 –Rotating the Electronics Housing
The mounting position of absolute pressure models STA822, STA82L, or a draft range
model STD810 is critical as the Transmitter spans become smaller.
A maximum zero shift of 2.5 mmHg for an Absolute Transmitter or 1.5 inches of water
(inH2O) for a Draft Range Transmitter can result from a mounting position that is rotated
90ofrom the vertical. A typical zero-shift of 0.12 mmHg or 0.20 inH2O can occur for a five
(5)-degree rotation from the vertical.