Baker Hughes Masoneilan SVI3 User manual

Masoneilan™
SVI™ 3 Digital Positioner
Advanced Performance
Instruction Manual (Rev. B)
Baker Hughes Data Classification: Public

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About this Guide
This instruction manual applies to the following instruments and approved software:
SVI3
with Firmware version 1.1.1 or higher.
with ValVueTM version 3.6 or greater
with SVI3 DTM Version 3.10 or Higher
with SVI3 DD File 0101 or Higher
The information contained in this manual, in whole or part, shall not be transcribed or copied without Baker Hughes’ written
permission.
In no case does this manual guarantee the merchantability of the positioner or the software or its adaptability to a specific client
needs. Please report any errors or questions about the information in this manual to your local supplier or visit
valves.bakerhughes.com.
DISCLAIMER
THESE INSTRUCTIONS PROVIDE THE CUSTOMER/OPERATOR WITH IMPORTANT PROJECT-SPECIFIC REFERENCE
INFORMATION IN ADDITION TO THE CUSTOMER/OPERATOR'S NORMAL OPERATION AND MAINTENANCE
PROCEDURES. SINCE OPERATION AND MAINTENANCE PHILOSOPHIES VARY, BAKER HUGHES COMPANY (AND ITS
SUBSIDIARIES AND AFFILIATES) DOES NOT ATTEMPT TO DICTATE SPECIFIC PROCEDURES, BUT TO PROVIDE BASIC
LIMITATIONS AND REQUIREMENTS CREATED BY THE TYPE OF EQUIPMENT PROVIDED.
THESE INSTRUCTIONS ASSUME THAT OPERATORS ALREADY HAVE A GENERAL UNDERSTANDING OF THE
REQUIREMENTS FOR SAFE OPERATION OF MECHANICAL AND ELECTRICAL EQUIPMENT IN POTENTIALLY
HAZARDOUS ENVIRONMENTS. THEREFORE, THESE INSTRUCTIONS SHOULD BE INTERPRETED AND APPLIED IN
CONJUNCTION WITH THE SAFETY RULES AND REGULATIONS APPLICABLE AT THE SITE AND THE PARTICULAR
REQUIREMENTS FOR OPERATION OF OTHER EQUIPMENT AT THE SITE.
THESE INSTRUCTIONS DO NOT PURPORT TO COVER ALL DETAILS OR VARIATIONS IN EQUIPMENT NOR TO PROVIDE
FOR EVERY POSSIBLE CONTINGENCY TO BE MET IN CONNECTION WITH INSTALLATION, OPERATION OR
MAINTENANCE. SHOULD FURTHER INFORMATION BE DESIRED OR SHOULD PARTICULAR PROBLEMS ARISE WHICH
ARE NOT COVERED SUFFICIENTLY FOR THE CUSTOMER/OPERATOR'S PURPOSES THE MATTER SHOULD BE
REFERRED TO BAKER HUGHES.
THE RIGHTS, OBLIGATIONS AND LIABILITIES OF BAKER HUGHES AND THE CUSTOMER/OPERATOR ARE STRICTLY
LIMITED TO THOSE EXPRESSLY PROVIDED IN THE CONTRACT RELATING TO THE SUPPLY OF THE EQUIPMENT. NO
ADDITIONAL REPRESENTATIONS OR WARRANTIES BY BAKER HUGHES REGARDING THE EQUIPMENT OR ITS USE ARE
GIVEN OR IMPLIED BY THE ISSUE OF THESE INSTRUCTIONS.
THESE INSTRUCTIONS ARE FURNISHED TO THE CUSTOMER/OPERATOR SOLELY TO ASSIST IN THE INSTALLATION,
TESTING, OPERATION, AND/OR MAINTENANCE OF THE EQUIPMENT DESCRIBED. THIS DOCUMENT SHALL NOT BE
REPRODUCED IN WHOLE OR IN PART WITHOUT THE WRITTEN APPROVAL OF BAKER HUGHES.
Copyright
All information contained herein is believed to be accurate at the time of publication and is subject to change without notice.
PN 720091351 Rev B.
Copyright 2021 by Baker Hughes Company. All rights reserved.

Masoneilan SVI3 Installation and Maintenance Manual =| 3
© 2021 Baker Hughes Company. All rights reserved.
Document Changes
Version/Date Changes
- /03-2021 Original Release.
A /03-2021 Added Online Valve Diagnostics Section.
Added Russia and China Regional Contents.
Added Handling and Disposal Section.
B /04-2021 Added Vibration Influence Value

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Contents
’ DISCLAIMER ...................................................................................................................... 2
’ Copyright............................................................................................................................. 2
1. Safety Information and Documentation Standards ...................................................................... 7
1.1 Safety Symbols.....................................................................................................................7
1.2 SVI3 Product Safety .............................................................................................................7
1.3 About This Manual..............................................................................................................12
1.3.1 Conventions Used in This Manual ............................................................................. 12
1.4 Related Documentation for the SVI3 ..................................................................................13
1.4.1 Masoneilan Help Contacts .........................................................................................13
2. Introduction ................................................................................................................................15
2.1 Overview.............................................................................................................................15
2.2 SVI3 Features.....................................................................................................................16
2.3 Physical and Operational Description.................................................................................17
2.3.1 Principle of Operation ................................................................................................17
2.3.2 Main Electronics Module............................................................................................18
2.3.3 Pneumatic Module ..................................................................................................... 18
2.3.4 Optional Display Module with Pushbuttons................................................................19
2.3.5 Options Module.......................................................................................................... 19
2.4 ValVue Software .................................................................................................................20
2.4.1 ValVue and SVI3 DTM Software................................................................................ 20
2.4.2 Masoneilan Software Download ................................................................................20
2.5 Advanced and Online Diagnostics......................................................................................20
3. SVI3 Installation and Set Up ...................................................................................................... 21
3.1 Physical Dimension and Weights .......................................................................................21
3.1.1 SVI3 Dimensions ....................................................................................................... 21
3.2 Pre-Installation Guidelines..................................................................................................23
3.3 Installation Steps ................................................................................................................ 23
3.4 Mounting the Positioner ......................................................................................................25
3.4.1 Filter Regulator and Tubing .......................................................................................25
3.4.2 Mounting the SVI3 on Rotary Valves.........................................................................25
3.4.3 Special Cases............................................................................................................ 30
3.4.4 Mounting the SVI3 on Reciprocating Valves.............................................................. 30
3.5 Connecting the Tubing and Air Supply ...............................................................................34
3.5.1 Air Supply Requirements ........................................................................................... 35
3.5.2 Installing an SVI3 in a Natural Gas Environment.......................................................35
3.6 Wiring the SVI3...................................................................................................................36
3.6.1 Required Practices for Explosion Proof Installations .................................................36
3.6.2 Wiring Guidelines.......................................................................................................36
3.6.3 Connecting to the Control Loop ................................................................................. 37
3.6.4 Wiring an Options Board............................................................................................38
3.6.5 System Connections..................................................................................................43

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3.7 Power Up............................................................................................................................ 47
3.7.1 Air to Open and Air to Close Actuators...................................................................... 47
3.7.2 Before Powering Up................................................................................................... 50
3.7.3 Powering Up the SVI3 ............................................................................................... 50
4. Using the Digital Interfaces ........................................................................................................ 51
4.1 Overview............................................................................................................................. 51
4.1.1 SVI3 DTM with Valvue............................................................................................... 51
4.1.2 SVI3 DD for HART Communicators........................................................................... 51
4.1.3 Local Display and Pushbuttons ................................................................................. 51
4.2 Configuring and Calibrating with SVI3 DTM with Valvue.................................................... 52
4.3 Local Interfaces and Configurations ................................................................................... 52
4.3.1 Pushbuttons............................................................................................................... 52
4.3.2 NAMUR Status .......................................................................................................... 53
4.3.3 Pushbutton Locks and Configuration-Lock Jumper ................................................... 54
4.3.4 Hardware Configuration Lock .................................................................................... 55
4.3.5 Perform Smart Cal ..................................................................................................... 55
4.3.6 NORMAL Operating Mode and MANUAL Mode Menus............................................ 56
4.3.7 VIEW DATA Menu..................................................................................................... 57
4.3.8 VIEW ERR Diagnostics Messages ............................................................................ 58
4.3.9 Configure Menu ......................................................................................................... 59
4.3.10 Calibration Menu...................................................................................................... 63
4.3.11 Adjust Input Signal Range ....................................................................................... 65
4.3.12 FAILSAFE Mode...................................................................................................... 66
4.4 Check-out with SVI3 DD using HART Communications..................................................... 68
4.4.1 SVI3 DD Menu Structure ........................................................................................... 69
4.4.2 Run Auto Tune........................................................................................................... 70
4.4.3 Run Find Stops.......................................................................................................... 70
4.4.4 Run Open Stop Adjustment ....................................................................................... 70
4.4.5 Run Diagnostics......................................................................................................... 70
4.4.6 View and Clear Faults................................................................................................ 71
5. Maintenance and Troubleshooting ............................................................................................ 73
5.1 SVI3 Maintenance and Repair............................................................................................ 73
5.1.1 Repair ........................................................................................................................ 73
5.1.2 Spare Parts................................................................................................................ 74
5.2 Internal Diagnostics ............................................................................................................ 76
5.2.1 Device Status Diagnostics......................................................................................... 76
6. Specifications and References .................................................................................................. 89
6.1 Physical and Operational Specifications............................................................................. 89
6.1.1 Storage ...................................................................................................................... 95
6.1.2 Protection................................................................................................................... 95
6.1.3 Handling..................................................................................................................... 95
6.1.4 Disposal..................................................................................................................... 95
6.1.5 SVI3 Model Numbering.............................................................................................. 97
6.2 Model and Features Comparison ....................................................................................... 99

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7. Tuning and Advanced Usage ..................................................................................................101
7.1 Adjusting Speed of Response ..........................................................................................101
7.1.1 Notes on Aggressiveness ........................................................................................ 102
7.2 Troubleshooting Autotune................................................................................................. 102
7.3 Tight Shutoff ..................................................................................................................... 104
7.3.1 Tight Shutoff Application to Protect from Seat Erosion............................................ 104
7.3.2 Tight Shutoff Application to High Pressure Liquid Letdown Valve Trim...................104
7.4 Using SVI3 DTM Diagnostics ...........................................................................................104
7.4.1 Online Valve Diagnostics.........................................................................................105
7.4.2 Continuous Diagnostics ...........................................................................................111
7.4.3 Monitoring a Valve Bellows Seal.............................................................................. 111
7.4.4 Critical Service, Cavitation Control Trim .................................................................. 111
7.4.5 Diagnostic Valve Tests ............................................................................................111
7.5 Determining an SVI Positioner Compliance Voltage in a Control System ........................ 111
7.5.1 Compliance Test Setup............................................................................................ 112
7.6 HART Physical Layer Compliance of the Control System ................................................ 113
7.6.1 Impedance Constraints ..............................................................................................113
7.6.2 Noise Constraints..................................................................................................... 113
7.6.3 Capacitance vs. Length of Cable for HART............................................................. 114
7.6.4 HART Filter Requirements.......................................................................................114
7.7 Split Range Applications................................................................................................... 114
7.7.1 Multiple Output Circuit Control System ....................................................................115
7.7.2 Isolators ................................................................................................................... 115
7.7.3 Supplemental Power Supply....................................................................................117
7.7.4 Verify Wiring and Connections................................................................................. 117
7.8 HART Communications with Intrinsic Safety .................................................................... 118
7.8.1 Overview..................................................................................................................118
7.8.2 HART Barrier Compliance .......................................................................................119
7.8.3 Output Channel Isolation ......................................................................................... 120

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© 2021 Baker Hughes Company. All rights reserved.
1. Safety Information and Documentation
Standards
This section provides safety information including safety symbols that are used on the SVI3
and the safety symbol definition.
1.1 Safety Symbols
SVI3 instructions contain WARNINGS, CAUTIONS and Notes, where necessary, to alert
you to safety related or other important information. Total compliance with all WARNING,
and CAUTION notices is required for safe operation.
1.2 SVI3 Product Safety
Refer to Product Safety manual ES817 for detailed safety instructions. The SVI3 digital
valve positioner is intended for use with industrial compressed air or natural gas systems
only (see “Installing an SVI3 in a Natural Gas Environment” on page 35).
Ensure that an adequate pressure relief provision is installed when the application of
system supply pressure could cause peripheral equipment to malfunction. Installation must
be in accordance with local and national compressed air and instrumentation codes.
General installation, maintenance or replacement
CAUTION Read this entire section before installation and operation.
WARNING Indicates a potentially hazardous situation, which if not avoided
could result in serious injury.
CAUTION Indicates a potentially hazardous situation, which if not avoided
could result in property or data damage.
NOTE : Indicates important facts and conditions.

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• Products must be installed in compliance with all local and national codes and
standards by qualified personnel using safe site work practices. Personal
Protective Equipment (PPE) must be used per safe site work practices.
• Ensure proper use of fall protection when working at heights, per safe site work
practices. Use appropriate safety equipment and practices to prevent the dropping
of tools or equipment during installation.
• Under normal operation, compressed supply gas is vented from the SVI3 to the
surrounding area, and may require additional precautions or specialized
installations.
• Installation and maintenance must be performed only by qualified personnel. SVI3
repairs are beyond the scope of this manual and must be performed by a MARC
(Masoneilan Authorized Repair Center).
• Approved wire seals against ingress of water and dust are required and the 1/2"
NPT fittings must be sealed with tape or pipe sealent in order to meet the highest
level of ingress protection. Ensure that dust levels are accounted for during
installation.
• Wiring and conduit must conform to all local and national codes governing the
installation. Wiring must be rated for at least 85º C (185º F) or 5º C (41º F) above
max ambient, whichever is greater.
• Area Classification, Protection Type, Temperature Class, Gas Group, and Ingress
protection must conform to the data indicated on the label.
• There can be unexpected valve, actuator or positioner movement at any time
during installation or operation.
Intrinsically Safe Installation
Products certified as explosion proof or flame proof equipment or for use in intrinsically
safe installations MUST BE:
• Installed, put into service, used and maintained in compliance with national and
local regulations and in accordance with the recommendations contained in the
relevant standards concerning potentially explosive atmospheres.
• Used only in situations that comply with the certification conditions shown in this
document and after verification of their compatibility with the zone of intended use
and the permitted maximum ambient temperature.

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© 2021 Baker Hughes Company. All rights reserved.
• Installed, put into service and maintained by qualified and competent professionals
who have undergone suitable training for instrumentation used in areas with
potentially explosive atmospheres.
Carefully unpack the equipment and check it is not damaged. In the case of any damage,
notify the manufacturer.
Use only genuine replacement parts which are provided by the manufacturer, to
guarantee that the products comply with the essential safety requirements of the
European Directives.
Changes to specifications, structure, and components used may not lead to the revision
of this manual unless such changes affect the function and performance of the product.
Refer to Product Safety manual ES817 for detailed safety instructions..
WARNING Before using these products with fluids/compressed gases other
than air or for non-industrial applications, consult the factory. This
product is not intended for use in life support systems.
Under certain operating conditions, the use of damaged instruments
could cause a degradation of the performance of the system, which
can lead to personal injury or death.
Installation in poorly ventilated confined areas, with any potential of
gases other than oxygen being present, can lead to a risk of
personnel asphyxiation.
WARNING Failure to adhere to the requirements listed in this manual can cause
loss of life and property.
WARNING Before installing, using, or carrying out any maintenance tasks
associated with this instrument, READ THE INSTRUCTIONS
CAREFULLY.

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WARNING To avoid injury or the process being affected when installing or
replacing a positioner on a control valve,
• There can be unexpected valve, actuator or positioner movement at any
time during installation or operation.
• If the valve is located in a hazardous area, ensure that the area has been
certified as safe or that all electrical power to the area has been discon-
nected before removing any covers or disconnecting any leads.
• Shut off air supply to the actuator and to any valve mounted equipment.
• Ensure the valve is isolated from the process by either shutting off the pro-
cess or using bypass valves for isolation. Tag shutoff or bypass valves to
guard against turn-on while work is in progress.
• Purge air from the actuator and ensure that the valve is in unenergized con-
dition.
NOTE : The threaded end cover of the SVI3 is a critical component for safety in
Hazardous Areas. To ensure safe operation and proper seal, fully engage the
cover threads, within the housing, and cover flange area makes contact with
the housing, the lock screw is backed out into the cover to prevent the cover
from loosening.
WARNING
tz
Isolate the valve from the process and disconnect air tubing from the
positioner. Disconnect air fully to avoid injury or process damage.
WARNING Do not exceed Maximum Actuator pressure or Maximum supply
pressure (120 psi) whichever is lower. When the pressure limit is
exceeded, damage to equipment or injury to personnel can occur.
CAUTION Do not use pipe thread sealant tape on pneumatic fittings. It may
shred into small particles that can cause instrument malfunction.
CAUTION Remove any excess pipe thread sealant from the first and second
threads to prevent uncured sealant from entering the air lines.
NOTE : The SVI3 Digital Valve Positioner is designed to operate with clean, dry,
oil-free, instrument grade air to ANSI-ISA-57.3 1975 (R1981) or ISA-S7.3-1975
(R1981) or with a sweet natural gas supply.

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NOTE : For small actuators it may be necessary to:
• Use 1/8" tubing for Autotune to work properly.
• Install tamper-proof adjustable needle valve in supply line to SVI; adjust
valve closed enough so autotune runs. Then lock valve setting so it can't be
tampered or changed.
WARNING There can be unexpected valve, actuator or positioner
movement at
any time during installation or operation.
CAUTION Do not connect a HART® modem and PC to a control circuit
unless
the controller is HART compatible or has a HART®
filter. Loss of
control or a process upset may occur if the controller output circuit is
not compatible with HART® signals.
Install in compliance with Hazardous Area rules in accordance with
local electrical codes and plant standards using trained specialists.
Do not connect a PC or HART® modem to an intrinsically safe
circuit
except on the safe area side of the barrier. Do not operate a PC in a
hazardous area without ensuring compliance with local and plant
regulations.
CAUTION A control circuit must be HART® compatible or have a HART®
filter
installed. Contact the manufacturers of the controller or DCS. See
“Controller outputs are separated internally from ground by a current
sense resistor or a control transistor. Dual channel barriers apply
excessive loop resistance and cause compliance voltage problems.
An Intrinsically Safe galvanic isolator operates with all three types of
output channels, isolated, grounded or separated from ground, and
provides sufficient compliance voltage. The galvanic isolator must
be certified by the manufacturer to be HART® compliant if the
HART® connections are supported on the safe area side of the
isolator. Consult barrier and isolator manufacturer for devices rated
for use with the SVI3 I.S. entity parameters in Hazardous Area
Approvals.”
√ Comply with current national and local regulations for electrical
installation work.
√ Comply with national and local explosive atmosphere regulations.
√ Before carrying out any work on the device, power off the
instrument or make sure that the locale conditions for potentially
explosive atmosphere permit the safe opening of the cover.

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1.3 About This Manual
The SVI3 Instruction Manual is intended to help experienced field personnel install, setup,
and calibrate an SVI3 in an efficient manner. This manual also provides in-depth
information on SVI3 software, digital interfaces, operation, intrinsic safety configurations,
and specifications. If you experience problems that are not documented in this guide
contact the factory or your local representative. Sales offices are listed on the back cover
of this manual.
1.3.1 Conventions Used in This Manual
Conventions used in this manual are as follows:
• Uppercase, italicized letters are used when referencing a term used in the SVI3
display window. For example, when indicating the term mode, as in setup mode,
and referring to the display/software operation the convention is to spell mode is all
uppercase letters: MODE.
• Italics is used for emphasis on important items.
• Fields where data is entered or user-entered data is italicized.
• Actions performed on buttons, checkboxes, etc. appear bolded. For example: Click
Done.
CAUTION Use of a low impedance voltage source damages the SVI3. The
SVI3 input must be a current controlled source. The SVI3 will not
function normally if connected directly to a voltage source. However,
direct connection to a current source of up to 30 V will not damage
the SVI3. A proper current source explicitly enables adjustment of
the current in mA, not V.
NOTE : When an SVI3 is turned on it is advisable to apply the air supply before
applying the electrical input signal.
NOTE : Indicates important facts and conditions.
CAUTION Indicates a potentially hazardous situation, which if not avoided
could result in property or data damage.
WARNING Indicates a potentially hazardous situation, which if not avoided
could result in serious injury.

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© 2021 Baker Hughes Company. All rights reserved.
1.4 Related Documentation for the SVI3
• ValVue documentation: The SVI3 DTM works inside various software (such as
PACTware), however it is designed to work best with our ValVue3 software. See
the ValVue3 help or Masoneilan ValVue3 Software Instruction Manual
(BHMN31426).
• Masoneilan SVI3 Digital Positioner Quick Start Guide (BHMN34586)
• Masoneilan SVI3 DTM Software Online Help Manual (BHMN34569A)
1.4.1 Masoneilan Help Contacts
• Email: [email protected]om
• Phone: 888-SVI-LINE (888-784-5463)

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Masoneilan SVI3 Installation and Maintenance Manual =| 15
© 2021 Baker Hughes Company. All rights reserved.
2. Introduction
2.1 Overview
The SVI3 is a high performance, HART® based digital valve positioner that combines an
optional local display with remote communication and diagnostic capabilities. The SVI3
options board offers and enables the unit to fulfill the broadest range of applications.
The optional pushbutton and LCD display enables local operations of calibration and
configuration functions. Remote operations can be performed with ValVue software or any
HART® Registered host interface that has been pre-loaded with the SVI3 Device
Description file (DD).
The SVI3 DTM and ValVue3 Masoneilan's software facilitates control valve setup and
diagnostics. This can be downloaded at
https://valves.bakerhughes.com/resource-center.
Figure 1 SVI3 Positioner

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2.2 SVI3 Features
The SVI3 Digital Valve Positioner (see Figure 1) is suitable for installation indoors or
outdoors, and in a corrosive industrial or marine environment and is equipped with the
following features:
• Extreme Accuracy • Extreme Reliability
• Extreme Digital Precision • Automated Valve Commissioning
• Valve Position Autotuning • One Model for both Rotary or Reciprocat-
ing Valves
• Local Operation/calibration/ configuration
with Optional Flameproof Push Buttons
and LCD Digital Display
• Compatible with Air-to-Close or
Air-to-Open Actuators
• Non-contact Magnet Coupled (Hall
Effect) Position Sensing for Rotary and
Reciprocating Control Valves
• Sealed Housing with No Moving Shafts,
No Shaft Penetration, and Fully Potted
Electronics
• Uniform Hazardous Area Approvals for
ATEX, IEC, USA and Canada with Other
Approvals Available Upon Request
• Local, Online Diagnostic Condition Moni-
tor: Total Stem Travel, Number of Valve
Cycles, Predictive Maintenance Data
• Online Valve Diagnostic KPI's with 1 year
of onboard data storage
• Advanced Valve Diagnostics with ValVue
Software
• User-adjustable Response Times
• Precise, Quick, Responsive Control of
Valve Position
• Split-range Capability
• Configurable High and Low Position
Limits
• Optimized Performance Regardless of
Actuator Size
• User Configurable Tight Shutoff at
Adjustable Input Signal
• HART® 7 • HART® Remote Operation Calibration
Configuration Diagnostics Using ValVue
software or a HART® handheld commu-
nicator
• Single Acting • Stroke Characterization for Linear and
Non Linear Response
• Remote Position Sensor with Options
board
• Two Contact Outputs User Linked to Vari-
ous Status and Alarm Flags with Options
board
• Optional Pushbutton Display

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© 2021 Baker Hughes Company. All rights reserved.
2.3 Physical and Operational Description
The SVI3 is housed in an industrial, tough, weatherproof, corrosion resistant aluminum
housing that has been designed for operation in hazardous areas. Electrical connections
are made through two 1/2" NPT conduit entries. Pneumatic connections are made
through two ¼" NPT ports.
2.3.1 Principle of Operation
The SVI3 is a smart electro-pneumatic positioner that:
1. Receives a 4 - 20 mA electrical position setpoint signal from the controller and
compares the position setpoint input signal to the valve position feedback sensor.
2. Uses the difference between the position setpoint and position feedback is analyzed
by the position control algorithm to set a servo signal for the I/P converter.
3. Processes the I/P output pressure and amplifies it by using a pneumatic relay that
drives the actuator.
4. Assures the error between the setpoint and the valve position feedback is within
range, no other correction is applied to the servo signal in order to maintain valve
position.
Figure 2 Block Diagram with I/P Converter and Pressure Sensor
Power
HART
Posion Setpoint
Characteriscs
Diagnoscs
Non– Linear PID
Posion Control
Magnecally
Coupled Hall-Effect
Posion Sensor
Display
Flow Regulator
I/P
Current to Pressure
Converter
Pneumac Relay
DA
Filter
Input Current, 4
to 20 mA
Electronics Air Supply
PS
I
P
P1
Actuator
Pressure Sensor

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2.3.2 Main Electronics Module
The Main electronics module is the main controller for all the electronics functionality in
the SVI3 unit. It performs the functions including HART Communications, actuator
position control, valve diagnostics and power management. It also interfaces with
external control system (PLC, DCS...). Main module also has Hall Position Sensor, A/D,
D/A, Temperature sensor and HART Communication chip.
2.3.2.1 Magnetic Position Sensor
A Hall effect based position sensor uses magnetic field to measure the valve position
through the housing wall. It senses the rotation of a magnetic assembly directly mounted
on the end of a rotary valve shaft or by a turnbuckle and lever assembly connected to a
reciprocating valve shaft.
The output of the Hall sensor provides the position feedback signal to the position control
algorithm. The magnetic assembly is environmentally sealed and is entirely external to
the electronics housing. This sensor has a maximum travel range of up to 140° rotation.
2.3.2.2 Temperature Sensor
A temperature sensor is located in the electronics module and measures temperature
within the enclosure. This measurement is used to provide temperature compensation for
the position and pressure sensors and other internal electronic components. The
temperature sensor reading is used to provide warning of excessive ambient temperature
at the positioner.
2.3.3 Pneumatic Module
The pneumatic module consists of I/P Converter, Pneumatic Relay and Pneumatic
Electronics. The Pneumatic electronics board contains pressure sensors and mechanical
component compensation circuitry. This module also acts as pass through for display
module.
2.3.3.1 Pressure Sensor
There are four pressure sensors in the pneumatic electronics board. they are used for
measurement of Ambient, Pilot, Supply and Actuator pressure.
2.3.3.2 Current-to-Pressure Converter, I/P
The I/P converts a current signal to a pressure signal in the following manner. A fixed coil
creates a magnetic field proportional to the applied current. The field magnetically pulls a
flexure towards a nozzle to increase pressure on the flexure. The pressure on the flexure
increases in response to an increase in the coil current. Encapsulation of the coil provides
protection from the environment.

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2.3.3.3 Single Acting Pneumatic Relay
The single acting pneumatic relay amplifies the pressure from the I/P and increases
airflow as required for stable, responsive, actuator performance. The single acting relay
operates on any supply pressure that is at least 5 psi (.345 bar, 34.5 kPa) above the
required actuator pressure, up to 120 psi (8.3 bar, 830 kPa).
Figure 3 SVI3 Pneumatic Module with Single Acting Relay
2.3.4 Optional Display Module with Pushbuttons
The optional display and buttons are mounted on the SVI3 cover plate. The four
pushbutton switches operating in conjunction with the display permit reading and
modification of the instrument operating parameters without a PC or HART® hand-held
communicator. These switches perform generic functions - Increase, Decrease, Accept
and Smart Cal/Back by movement through a conventional menu structure, See “Using
the Digital Interfaces” on page 51. The Switches are operable as indicated on the product
label, including when intrinsically safe and flameproof protection concepts are required.
2.3.5 Options Module
Options module is an electronics add-on which extends the positioner functionality. It
includes solid state relay based switches, Digital input, 4-20 mA position retransmit, 1-5V
process variable input and remote position input. This module has all the required wiring
terminations for I/Os and can be field installed if purchased separately.
Pneumatic
module

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2.4 ValVue Software
Valvue provides the ability to quickly setup SVI3, monitor operations and diagnose
problem.
2.4.1 ValVue and SVI3 DTM Software
You must download the ValVue software and the SVI3 DTM software and install to
configure and use the SVI3. For the most recent software visit our SVI3 web site at:
https://valves.bakerhughes.com/resource-center
The SVI3 DTM software comes with a trial version of ValVue. For 60 days after the initial
installation, The ValVue software provides the FDT frame capability in which the SVI3
DTM software operates. The SVI3 DTM software provides the capability of configuring,
calibrating, diagnosing, trending and much more. After the 60 trial period ValVue must be
registered for use. ValVue Functionality includes:
2.4.2 Masoneilan Software Download
Refer to SVI3 DTM & Software manual to download and install the software.
2.5 Advanced and Online Diagnostics
The SVI3 offers various levels of control valve diagnostics. Up to five pressure sensors,
plus circuitry that can detect circuit board temperature, loop current, and reference
voltage, are available for diagnostics.
For more details on the use of ValVue software, refer to the ValVue User's Guide. Contact
the factory or your local representative to obtain licensing information.
NOTE : You must use the ValVue3 software and the SVI3 DTM software to support
HART® 7. ValVue 2.x will not work.
• Setup Wizard • Remote display of valve position, actuator
pressure(s)
• Set calibration parameters • Set configuration parameters
• Monitor status/error indicators • Input/Output configuration
• Remote calibration of the SVI3 • Remote configuration of the SVI3
• Remote operation of the SVI3 • Backup and restore configuration (clone
device)
• Trend setpoint, valve position, actu-
ator pressure
• Display comparative test results (full version
only)
• Perform diagnostic test procedures
(full version only)