ABB AV1, AV2 Operating Instructions

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ABB ME A SUREMENT & ANALY TICS | OPER ATING INSTRUCTION | OI/AV12 RE V. E

AV1 and AV2

Characterizable pneumatic and electro-pneumatic positioners

Pneumatic and electro-pneumatic positioners built on proven performance for demanding process conditions

Measurement made easy

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Characterizable analog positioners

Introduction

AV characterizable pneumatic positioners are control devices that satisfy a wide range of applications. They provide fast, sensitive and accurate positioning of pneumatic singleor double-acting, linear or rotary motion actuators. A mechanical connection from the actuator to a position feedback cam in the positioner establishes actual position. Three characterized segments on one cam provide application flexibility by establishing various relationships between input signal and actuator position. The relationships provided by the segments are square root, linear and square.

Trademarks and Registrations

Registrations and trademarks used in this document include:

® Delrin	Registered trademark of E.I. DuPont de Nemours Company, Incorporated
® Dow Corning	Registered trademark of Dow Corning Corporation
® Lexan	Registered trademark of General Electric Company, GE Plastics Division
® Monel	Registered trademark of International Nickel Company
® Noryl	Registered trademark of General Electric Company, GE Plastics Division
® PowerRac	Registered trademark of DeZurik, a Unit of General Signal
® Rynite	Registered trademark of E.I. DuPont de Nemours Company, Incorporated
® Teflon	Registered trademark of E.I. DuPont de Nemours Company, Incorporated
® Valox	Registered trademark of General Electric Company, GE Plastics Division
® Viton	Registered trademark of E.I. DuPont de Nemours Company, Incorporated

WARNING notices as used in this manual apply to hazards or unsafe practices which could result in personal injury or death.

CAUTION notices apply to hazards or unsafe practices which could result in property damage.

NOTES highlight procedures and contain information which assist the operator in understanding the information contained in this manual.

All software, including design, appearance, algorithms and source codes, is copyrighted by ABB Inc. and is owned by ABB Inc. or its suppliers.

WARNING

POSSIBLE PROCESS UPSETS. Maintenance must be performed only by qualified personnel and only after securing equipment controlled by this product. Adjusting or removing this product while it is in the system may upset the process being controlled. Some process upsets may cause injury or damage.

NOTICE

The information contained in this document is subject to change without notice.

ABB Inc., its affiliates, employees, and agents, and the authors of and contributors to this publication specifically disclaim all liabilities and warranties, express and implied (including warranties of merchantability and fitness for a particular purpose), for the accuracy, currency, completeness, and/or reliability of the information contained herein and/or for the fitness for any particular use and/or for the performance of any material and/or equipment selected in whole or part with the user of/or in reliance upon information contained herein. Selection of materials and/or equipment is at the sole risk of the user of this publication.

This document contains proprietary information of ABB Inc., and is issued in strict confidence. Its use, or reproduction for use, for the reverse engineering, development or manufacture of hardware or software described herein is prohibited. No part of this document may be photocopied or reproduced without the prior written consent of ABB Inc..

Copyright 2019 ABB Inc. [May, 2019]

	Table of Contents
	Page
SECTION 1 - INTRODUCTION...................................................................................................	1-1
OVERVIEW .....................................................................................................................................	1-1
INTENDED USER ...........................................................................................................................	1-1
DESCRIPTION ................................................................................................................................	1-1
Performance Series Option ......................................................................................................	1-2
Explosionproof I/P Option.........................................................................................................	1-3
NEMA 4X Option ......................................................................................................................	1-3
APPLICATION.................................................................................................................................	1-3
FEATURES .....................................................................................................................................	1-3
INSTRUCTION CONTENT..............................................................................................................	1-5
REFERENCE DOCUMENTS ..........................................................................................................	1-6
NOMENCLATURE ..........................................................................................................................	1-6
SPECIFICATIONS...........................................................................................................................	1-7
SECTION 2 - DESCRIPTION AND OPERATION.......................................................................	2-1
INTRODUCTION .............................................................................................................................	2-1
FUNCTIONAL OPERATION ...........................................................................................................	2-2
SECTION 3 - INSTALLATION ....................................................................................................	3-1
INTRODUCTION .............................................................................................................................	3-1
UNPACKING AND INSPECTION....................................................................................................	3-1
ENCLOSURE CLASSIFICATION....................................................................................................	3-2
MOUNTING CONSIDERATIONS....................................................................................................	3-2
MOUNTING TYPE AV POSITIONERS ...........................................................................................	3-4
TUBING CONNECTIONS ...............................................................................................................	3-8
Air Supply Pressure..................................................................................................................	3-8
Air Supply Filtering ...................................................................................................................	3-8
Air Supply Quality (Recommended) .........................................................................................	3-9
Tubing Connections .................................................................................................................	3-9
WIRING TYPE AV2 POSITIONER................................................................................................	3-10
WIRING TYPE AV1 POSITIONER................................................................................................	3-13
RADIO FREQUENCY INTERFERENCE.......................................................................................	3-15
WIRING REQUIREMENTS ...........................................................................................................	3-15
SECTION 4 - CALIBRATION......................................................................................................	4-1
INTRODUCTION .............................................................................................................................	4-1
CALIBRATION.................................................................................................................................	4-1
Zero Adjustment .......................................................................................................................	4-1
Span Adjustment ......................................................................................................................	4-3
CALIBRATION FOR PARTICULAR APPLICATION .......................................................................	4-3
Zero Adjustment .......................................................................................................................	4-4
Span Adjustment ......................................................................................................................	4-4
GAIN AND SPEED ADJUSTMENTS ..............................................................................................	4-5
Gain Adjustment.......................................................................................................................	4-5
Speed Adjustment ....................................................................................................................	4-6
ORIFICE............................................................................................................................	4-6
PILOT VALVE STROKE ADJUSTMENT ..........................................................................	4-6
TROUBLESHOOTING CALIBRATION ADJUSTMENTS................................................................	4-8
SECTION 5 - OPERATING PROCEDURES...............................................................................	5-1
INTRODUCTION .............................................................................................................................	5-1

i

Table of Contents (continued)

EQUALIZING AND AIR SUPPLY SHUTOFF VALVE	Page
	..................................................................... 5-1
Transfer from Automatic to Manual Operation ........................................................................	5-1
Transfer from Manual to Automatic Operation ........................................................................	5-1

...........................................................................................SECTION 6 - TROUBLESHOOTING	6-1
INTRODUCTION ............................................................................................................................	6-1
SECTION 7 - MAINTENANCE.....................................................................................................	7-1
INTRODUCTION ............................................................................................................................	7-1
PREVENTIVE MAINTENANCE SCHEDULE .................................................................................	7-1
PREVENTIVE MAINTENANCE PROCEDURES ...........................................................................	7-2
MANIFOLD FILTERS .....................................................................................................................	7-2
SECTION 8 - REPAIR AND REPLACEMENT.............................................................................	8-1
INTRODUCTION ............................................................................................................................	8-1
REPLACEMENT PROCEDURES ..................................................................................................	8-1
Manifold...................................................................................................................................	8-1
Gain Hinge Spring ...................................................................................................................	8-2
Pilot Valve Assembly ...............................................................................................................	8-3
I/P Converter ...........................................................................................................................	8-4
Cam.........................................................................................................................................	8-5
Diaphragm Assembly ..............................................................................................................	8-5
DIAPHRAGM ASSEMBLY REMOVAL.............................................................................	8-6
DIAPHRAGM ASSEMBLY REPLACEMENT ...................................................................	8-6
PILOT VALVE STROKE ADJUSTMENT........................................................................................	8-7
SECTION 9 - SUPPORT SERVICES...........................................................................................	9-1
INTRODUCTION ............................................................................................................................	9-1
RECOMMENDED SPARE PARTS.................................................................................................	9-1
ADDITIONAL SPARE PARTS ........................................................................................................	9-3
APPENDIX A - POSITION TRANSMITTERS .............................................................................	A-1
INTRODUCTION ............................................................................................................................	A-1
DESCRIPTION AND OPERATION ................................................................................................	A-1
CALIBRATION................................................................................................................................	A-2
Calibrating the Potentiometric Position Transmitter ................................................................	A-2
POTENTIOMETRIC APPLICATION EXAMPLE ..............................................................	A-3
CALIBRATING THE POTENTIOMETRIC EXAMPLE ......................................................	A-4
Calibrating the 4 to 20-mA Position Transmitter......................................................................	A-6
APPENDIX B - QUICK START...................................................................................................	B-1
INTRODUCTION ............................................................................................................................	B-1
PRODUCT IDENTIFICATION (NOMENCLATURE).......................................................................	B-1
MOUNTING THE POSITIONER.....................................................................................................	B-2
TUBING CONNECTIONS...............................................................................................................	B-5
TYPE AV2 POSITIONER WIRING .................................................................................................	B-8
TYPE AV1 POSITIONER WIRING ...............................................................................................	B-10
CALIBRATION..............................................................................................................................	B-11

ii

Table of Contents (continued)
	Page
APPENDIX C - CAM CHARACTERIZATION .............................................................................	C-1
INTRODUCTION ............................................................................................................................	C-1
CAM CHARACTERIZATION ..........................................................................................................	C-1
CAM SELECTION ..........................................................................................................................	C-3
CAM SHAPING ..............................................................................................................................	C-5
APPENDIX D - TYPE AV1 PNEUMATIC POSITION TRANSMITTER.......................................	D-1
INTRODUCTION ............................................................................................................................	D-1
DESCRIPTION ...............................................................................................................................	D-1
INSTALLATION ..............................................................................................................................	D-2
CALIBRATION................................................................................................................................	D-3

List of Figures

No.	Title	Page
1-1.	Capacity (Exhaust to Atmosphere)...........................................................................................	1-9
1-2.	Air Consumption .....................................................................................................................	1-10
1-3.	Output Air Flow vs. Error Signal — Standard and Performance Series .................................	1-10
1-4.	Expanded First Quadrant View ..............................................................................................	1-11
2-1.	Operation Diagram ...................................................................................................................	2-1
2-2.	Block Diagram ..........................................................................................................................	2-1
3-1.	External and Mounting Dimensions..........................................................................................	3-3
3-2.	Electrical Connections..............................................................................................................	3-4
3-3.	Drive Arm Connections.............................................................................................................	3-4
3-4.	Drive Shaft Variations...............................................................................................................	3-5
3-5.	Mounting Using Linkage (Typical) ............................................................................................	3-5
3-6.	Mounting Using Direct Coupling (Typical) ................................................................................	3-6
3-7.	Cam..........................................................................................................................................	3-7
3-8.	Cam Roller Alignment...............................................................................................................	3-8
3-9.	Port Locations ..........................................................................................................................	3-9
3-10.	Direct Acting, Top Loaded, Single Acting Tubing Example.....................................................	3-11
3-11.	Reverse Acting, Top Loaded, Single Acting Tubing Example.................................................	3-12
3-12.	Direct Acting, Bottom Loaded, Single Acting Tubing Example ...............................................	3-12
3-13.	Reverse Acting, Bottom Loaded, Single Acting Tubing Example ...........................................	3-13
3-14.	Double Acting Tubing Example ..............................................................................................	3-14
3-15.	Wiring Connections ................................................................................................................	3-14
4-1.	Calibration Adjustments............................................................................................................	4-2
4-2.	Cam Roller Alignment...............................................................................................................	4-3
4-3.	Zero Adjustment Graph ............................................................................................................	4-4
4-4.	Span Adjustment Graph ...........................................................................................................	4-5
4-5.	Pilot Valve Adjustment..............................................................................................................	4-7
4-6.	Speed Adjustment Screws .......................................................................................................	4-7
4-7.	I/P Adjustment ..........................................................................................................................	4-9
7-1.	Positioner with Manifold ...........................................................................................................	7-3
7-2.	Manifold with Filter Cover Removed ........................................................................................	7-3
8-1.	Positioner with Manifold ...........................................................................................................	8-2
8-2.	Manifold O-Rings......................................................................................................................	8-3

iii

List of Figures (continued)

No.	Title	Page
8-3.	Pilot Valve Measurement for Maximum Speed........................................................................	8-8
8-4.	Stroke Adjustment Screws.......................................................................................................	8-8
9-1.	Mounting Kits...........................................................................................................................	9-6
9-2.	Bypass Valve Assembly...........................................................................................................	9-8
9-3.	Type AV1 Positioner ...............................................................................................................	9-11
9-4.	Type AV2 Positioner (Page 1 of 2).........................................................................................	9-16
9-4.	Type AV2 Positioner (Page 2 of 2).........................................................................................	9-17
A-1.	Terminal Block Connections ....................................................................................................	A-2
A-2.	Schematic Diagram .................................................................................................................	A-4
A-3.	Potentiometric Position Transmitter (Exploded View)..............................................................	A-5
A-4.	Calibration Features for 4 to 20-mA Position Transmitter........................................................	A-6
A-5.	4 to 20-mA Position Transmitter (Exploded View) ...................................................................	A-7
B-1.	Mounting Using Linkage (Typical) ...........................................................................................	B-3
B-2.	Mounting Using Direct Coupling (Typical) ...............................................................................	B-3
B-3.	Drive Arm Connections............................................................................................................	B-4
B-4.	Cam Roller Alignment..............................................................................................................	B-4
B-5.	Port Locations..........................................................................................................................	B-5
B-6.	Direct Acting, Top Loaded, Single Acting Tubing Example ......................................................	B-6
B-7.	Reverse Acting, Top Loaded, Single Acting Tubing Example ..................................................	B-6
B-8.	Direct Acting, Bottom Loaded, Single Acting Tubing Example ................................................	B-7
B-9.	Reverse Acting, Bottom Loaded, Single Acting Tubing Example ............................................	B-7
B-10.	Double Acting Tubing Example................................................................................................	B-8
B-11.	Wiring Connections .................................................................................................................	B-9
B-12.	Calibration Adjustments...........................................................................................................	B-9
C-1.	Cam A, Square Root Relationship...........................................................................................	C-1
C-2.	Cam B, Linear Relationship.....................................................................................................	C-2
C-3.	Cam C, Square Relationship...................................................................................................	C-2
C-4.	Regulated Device Characteristics ...........................................................................................	C-4
C-5.	Desired Control........................................................................................................................	C-4
C-6.	Cam Characteristics ................................................................................................................	C-5
C-7.	Graph to Cam Data Transfer ...................................................................................................	C-7
D-1.	Pneumatic Position Transmitter Kit..........................................................................................	D-2

List of Tables

No.	Title	Page
1-1.	Reference Documents.............................................................................................................	1-6
1-2.	Nomenclature ..........................................................................................................................	1-6
1-3.	Type AV1/2 Positioner Specifications......................................................................................	1-7
1-4.	Type AV ____1__ Potentiometric Position Transmitter Specifications ..................................	1-11
1-5.	Type AV____2__ 4 to 20-mA Position Transmitter Specifications .......................................	1-11
1-6.	Agency Approvals..................................................................................................................	1-12
1-7.	Accessories ...........................................................................................................................	1-12
1-8.	Rotary Actuator Retrofit Mounting Kits ..................................................................................	1-13
1-9.	Speed Control Orifices ..........................................................................................................	1-13
1-10.	Pressure Gages.....................................................................................................................	1-13
1-11.	Supply Air Regulators with Gages.........................................................................................	1-13

iv

	List of Tables (continued)
No.	Title	Page
1-12.	Supply Air Filters ....................................................................................................................	1-14
1-13.	Component Material List ........................................................................................................	1-14
3-1.	Cam Characteristics .................................................................................................................	3-7
4-1.	Gain Hinge Springs ..................................................................................................................	4-5
6-1.	Positioner Errors.......................................................................................................................	6-1
7-1.	Preventive Maintenance Schedule...........................................................................................	7-1
9-1.	Shutoff Valve Kit No. 258270_1 ...............................................................................................	9-1
9-2.	AV Diaphragm Assembly Kit No. 258486_1.............................................................................	9-1
9-3.	AV Diaphragm Assembly Kit No. 258486_2 ............................................................................	9-2
9-4.	Filter Replacement Kit No. 258487_1 ......................................................................................	9-2
9-5.	Pilot Valve Assembly Kit No. 258488_1 ...................................................................................	9-2
9-6.	Pilot Valve Assembly Kit No. 258488_2...................................................................................	9-2
9-7.	Pilot Valve Assembly Kit No. 258488_3 ...................................................................................	9-2
9-8.	Pilot Valve Assembly Kit No. 258488_4...................................................................................	9-3
9-9.	Cam..........................................................................................................................................	9-3
9-10.	I/P Assembly Kit No. 258477_1................................................................................................	9-3
9-11.	Gain Hinge Springs ..................................................................................................................	9-3
9-12.	Manifold Assembly Kit No. 258491_1 ......................................................................................	9-3
9-13.	Cam Follower Arm Kit No. 258544_1 ......................................................................................	9-4
9-14.	Cover Assembly Kit No. 258545_1 ..........................................................................................	9-4
9-15.	Cover Assembly Kit No. 258545_1 ..........................................................................................	9-4
9-16.	Gage Block Assembly Kit No. 258569_1 .................................................................................	9-4
9-17.	Gage Block Assembly Kit No. 258569_3 .................................................................................	9-4
9-18.	Potentiometer ...........................................................................................................................	9-4
9-19.	4 to 20-mA Position Transmitter Circuit Board .........................................................................	9-5
9-20.	Positioner Mounting Kit Number 5327321_121........................................................................	9-5
9-21.	Positioner Mounting Kit Number 5327321_131........................................................................	9-5
9-22.	Positioner Mounting Kit Number 5327321_141 (for use on Fisher Actuators) .........................	9-6
9-23.	Rotary Actuator Retrofit Mounting Kits .....................................................................................	9-7
9-24.	Bypass Valve Assembly (Optional) ..........................................................................................	9-7
9-25.	Type AV1 Positioner Parts List.................................................................................................	9-9
9-26.	Input Signal Parts Reference for Type AV1 Positioners.........................................................	9-10
9-27.	Cam Selection and Manifold/Gage Block Parts Reference
	for Type AV1 Positioners........................................................................................................	9-10
9-28.	Shaft Position Transmitter Parts Reference for Type AV1 Positioners ..................................	9-12
9-29.	Drive Shaft Parts Reference for Type AV1 Positioners..........................................................	9-12
9-30.	Type AV2 Positioner Parts List ..............................................................................................	9-12
9-31.	Cam and Drive Shaft Parts Reference for Type AV2 Positioners ..........................................	9-13
9-32.	Manifold/Gage Block Parts Reference for Type AV2 Positioners ..........................................	9-15
9-33.	Shaft Position Transmitter Parts Reference for Type AV2 Positioners ..................................	9-15
9-34.	Conversion Kits ......................................................................................................................	9-17
A-1.	Potentiometric Position Transmitter Parts List ........................................................................	A-5
A-2.	4 to 20-mA Position Transmitter Parts List..............................................................................	A-7
B-1.	Nomenclature ..........................................................................................................................	B-1
B-2.	Calibration Procedures..........................................................................................................	B-11
C-1.	Control Signal Pressure Conversions (AV1) ...........................................................................	C-3
C-2.	Input to Output I/P Converter Relationships (AV2)..................................................................	C-3
D-1.	Pneumatic Position Transmitter Kit (258492_1)......................................................................	D-2

v

Read First

WARNING

INSTRUCTION MANUALS

Do not install, maintain or operate this equipment without reading, understanding and following the proper factory-supplied instructions and manuals, otherwise injury or damage may result.

RETURN OF EQUIPMENT

All equipment being returned to the factory for repair must be free of any hazardous materials (acids, alkalis, solvents, etc.). A Material Safety Data Sheet (MSDS) for all process liquids must accompany returned equipment.

Contact the factory for authorization prior to returning equipment.

Read these instructions before starting installation; save these instructions for future reference.

Contacting the Factory . . .

Should assistance be required with any of the company’s products, contact the following:

Telephone:

24-Hour Call Center

1-800-HELP-365

E-Mail:

[e-mail]

Read First I

Read First II

SECTION 1 - INTRODUCTION

OVERVIEW

This section covers the following topics:

•

•

•

•

•

•

•

•

•

•

•

Positioner description.

Positioner application.

Features of positioners.

Instruction content.

How to use this instruction.

Positioner nomenclature.

Positioner specifications.

Position transmitter specifications.

Agency approvals.

Accessories.

Mounting kits.

NOTE: Appendix B provides a quick start guide for the Type AV positioner. It is intended for control engineers having experience in the use and application of pneumatic positioners. The quick start guide highlights the major points of installation and calibration. Detailed installation and calibration information is contained in Section 3 and Section 4 respectively.

INTENDED USER

The information in this instruction is a guide for technical personnel responsible for installation, calibration, operation, maintenance and repair of the positioner.

DESCRIPTION

The Type AV1 and Type AV2 positioners are control devices that satisfy a wide range of applications. They provide fast, sensitive and accurate positioning of pneumatic single or double acting actuators.

The Type AV1 positioner receives an external pneumatic signal and converts it to a pneumatic output. The Type AV2 positioner accepts a four to 20-milliamp current that is applied to an I/P (current to pneumatic) converter, located inside the housing, to generate an internal signal pressure.

If a loss of signal occurs, the Type AV2 positioner goes to the four-milliamp position. The Type AV1 positioner goes to the 3 psi position.

OVERVIEW

1 - 1

INTRODUCTION

A mechanical connection from the actuator (i.e., cylinder, valve, etc.) to the position feedback cam in the positioner establishes actual position. Three characterized segments on the cam provide application flexibility by establishing various relationships between the input signal and the actuator position. The characterized curves on the cam provide:

•

•

•

Square root relationship. Linear relationship. Square characteristic.

Using the zero, span and gain adjustments and the cam, the actuator can respond with characteristics specific to an application.

An optional manifold assembly provides an integral shutoff and equalizing valve that can be used to isolate the positioner from an actuator, allowing manual override without removing the positioner from the process (required on double acting actuators with manual override). The manifold also provides gage ports and disposable filter cartridges that insure fast servicing and minimum downtime.

An optional gage block provides gage ports for mounting pressure gages. There are three gage ports on the block: One for instrument indication (internal input signal) and two for output indication. The gage block does not provide filters or means of isolating the positioner from the actuator. Installation of a supply gage is possible in the supply line (piping by customer).

Both positioners can be equipped with either an optional potentiometric or a four to 20-milliamp position transmitter that provides additional control features.

Performance Series Option

The Type AV positioner performance series provides a high flow gain pilot valve body by adding a P in the ninth nomenclature position. This high gain pilot valve body has square ports that provide a maximized air flow for a small motion of the pilot valve stem. A relatively small error signal can therefore cause a relatively large change in output air flow to the actuator. This feature is useful when driving larger actuators that might otherwise be insensitive or slow to respond to small signal changes.

Compared to other positioners on the market, the standard Type AV positioners have a high delivery capacity. The performance series increases this delivery capacity even more. The flow gain curves shown in Figures 1-3 and 1-4 show output air flow versus input error signal for the standard and high gain performance series positioners.

DESCRIPTION

1 - 2

INTRODUCTION

Figures 1-3 and 1-4 show that the large signal maximum air flow for both the standard and performance series positioners is about the same. The performance series positioners achieve maximum flow capacity at a much smaller error signal.

NOTE: ABB does not recommend using a performance series positioner on a small actuator, as it could cause instability.

Explosionproof I/P Option

The Type AV27 positioner employs an explosionproof I/P converter that is mounted to an adapter block manifold. The adapter block manifold is bolted to the outside of the main positioner housing. The unit is a Type AV12 positioner with the electric to pneumatic (four to 20-milliamp to 20.7 to 103.4-kilopascal (3.0 to 15.0-pounds per square inch gage)) conversion occurring within the externally mounted I/P converter.

The four to 20-milliamp input signal wires shall be connected through an explosionproof conduit entrance on the I/P converter. If no electrical connections are made within the main housing, the entire positioner can be considered suitable for application in the hazardous locations shown on the I/P label.

Refer to Figure 3-1 for the external and mounting dimensions of the Type AV27 positioner.

NEMA 4X Option

The Type AV______N positioner comes with a NEMA 4X housing. To maintain the NEMA 4X classification, the positioner shall be installed per drawing C258567 and suitable piping shall be attached to the vent opening and vented in a manner to preclude the entrance of water under pressure, as from a hose. Additionally, the conduit connections shall be suitable for a NEMA 4X rating.

APPLICATION

The Type AV1 and Type AV2 Characterizable Pneumatic Positioners control the position of a pneumatic actuator.

FEATURES

•Trouble-Free Operation. Proven pilot valve that is quickly removable, provides less downtime, lower maintenance costs, increased reliability and extended performance.

•Compact Rugged Design. Die cast aluminum housing, beam, spring arm, follower arm and 303 stainless steel pilot

APPLICATION

1 - 3

INTRODUCTION

valve provide long life and maximum environmental protection. The compact housing increases mounting flexibility.

•Characterizable Output. Large positioning cam can be shaped to provide desired relationship between the input signal and the actuator position.

•Accurate Calibration. Independent zero and span adjustments eliminate interaction and provide fast and accurate calibration.

•Simplified Reverse Operation. Action can be changed in the field by changing cams and reversing 01 and 02 connections. The reverse acting cam is conveniently located on the inside of the front cover.

•

•

•

Highly Visible Position Status Indicator. A fluorescent orange position indicator is visible through a polycarbonate window, providing fast indication of actuator position.

Vent Design Allows Natural Gas Operation. Vent pipe arrangement permits operation using natural gas.

Split Range Service. Split range capability allows sequencing of multiple actuators using a single control signal.

•Adjustable Gain. Two levels of gain are possible by changing the hinge springs supplied with the positioner.

•Adaptable Usage. The positioner can control both single and double acting, linear and rotary type actuators.

•

•

High Capacity. More than 0.65 cubic meters per minute (23 standard cubic feet per minute) can be supplied or exhausted at 482.6 kilopascals (70.0 pounds per square inch gage) supply pressure (Fig. 1-1).

Continuously Adjustable Span and Zero for Each Stroke Level. Capable of 100-percent stroke for 50-percent signal span or 50-percent stroke for 100-percent signal span.

•Low Air Consumption. Enhanced pilot valve design and manufacturing technique allows the Type AV positioner maximum performance with minimum air consumption (Fig. 1-2).

•Adjustable Speed Control without Additional Hardware. Speed of actuator can be reduced to desired speed using the pilot valve stroke adjustment screws.

FEATURES

1 - 4

INTRODUCTION

INSTRUCTION CONTENT

	This instruction includes the following sections:
Introduction	Provides a description of this instruction; its sections and uses,
	along with a brief description of the Type AV1 and Type AV2 posi-
	tioners. This section also provides reference documents (Table
	1-2), product nomenclature (Table 1-2), specifications (Tables 1-3,
	1-4 and 1-5), agency approvals (Table 1-6) and positioner acces-
	sories (Table 1-7). Table 1-8 lists retrofit mounting kits, Table 1-9
	lists available speed control orifices, and Table 1-10 lists the avail-
	able pressure gages. Table 1-11 lists pressure regulators, Table
	1-12 lists supply air filters available from ABB and Table 1-13 lists
	the materials used in the positioner components.
Description and	Describes the functional operation of the positioners.
Operation
Installation	Provides information about installing a Type AV positioner.
Calibration	Provides calibration and adjustment procedures.
Operating Procedures	Presents information and procedures for various applications.
Troubleshooting	Provides a table containing errors, causes and corrective action.
Maintenance	Includes preventive maintenance information and procedures.
Repair and	Procedures in this section give step-by-step instructions for
Replacement	removing and replacing components.
Support Services	Provides recommended spare and replacement parts lists. Illus-
	trations of both positioners provide part numbers for all major
	components.
Appendix A	Provides calibration information about the four to 20-milliamp posi-
	tion transmitter and the potentiometric position transmitter.
Appendix B	Quick start section for control engineers that are knowledgeable
	about positioners and the overall process in which the positioner is
	to be used.
Appendix C	Details cam shaping information.
Appendix D	Covers the pneumatic position transmitter option.
	HOW TO USE THIS INSTRUCTION
	For safety reasons, read and completely understand this instruc-
	tion before completing any tasks or procedures associated with
	installation, calibration, operation, maintenance or repair.
	INSTRUCTION CONTENT
	1 - 5

INTRODUCTION

The section arrangement of this instruction is sequential. After initial start-up and calibration, store this instruction in a safe place for future reference.

REFERENCE DOCUMENTS

	Table 1-1. Reference Documents
Number	Title
ANSI/NFPA 70	National Electrical Code
CEC	Canadian Electrical Code
D-AAP-UP	Universal Pneumatic Rotary Actuator, Type UP (specification)
D-APE-AV1234	Characterizable Positioners, Type AV1, AV2, AV3 & AV4 (specification)
CSA c22.1	Process Control Equipment
I-E96-500	Site Planning and Preparation
I-P81-20	Universal Pneumatic Rotary Actuator, Type UP (instruction)
ANSI/ISA-7.0.01-1996	Quality Standards for Instrument Air
ISA S75.13-1989	Method of Evaluating the Performance of Positioners with Analog Input Signals and
	Pneumatic Output (Instrument Society of America)
P-P88-001	Product Application Guide, Installing a Type AV Positioner in a Hazardous Location

NOMENCLATURE

													Table 1-2. Nomenclature
Position	1	2	3	4	5	6		7	8		9
Type	A V		_	_	_	_		_	_		_		Characterizable Positioners
			1										Characterizable Pneumatic Positioner
						Next Page
			2										Characterizable 4 to 20-mA Input Positioner (actuator moves to 0%
													or 100% upon loss of signal)
													Input Signal
				1									20.7 to 103.4 kPa (3.0 to 15.0 psig) (Type AV1)
				2									20.7 to 186.2 kPa (3.0 to 27.0 psig) (Type AV1)
				3									4 to 20 mA (standard intrinsically safe Type AV2)
				5									20.7 to 103.4 kPa (3.0 to 15.0 psig), high temperature applications
													(Type AV1) 1
				6									20.7 to 186.2 kPa (3.0 to 27.0 psig), high temperature applications
													(Type AV1) 1
				7									4 to 20 mA with explosionproof I/P converter (NEMA 7) (Type AV2) 2
													Stroke/Rotary Motion (cam selection)
					1								12.7 to 50.8 mm (0.5 to 2.0 in.) or 45° rotary motion
					2								25.4 to 101.6 mm (1.0 to 4.0 in.) or 90° rotary motion

REFERENCE DOCUMENTS

1 - 6

INTRODUCTION

Table 1-2. Nomenclature (continued)

Position

1

2

3

4

5

6

7

8

9

Type

A V

_

_

_

_

_

_

_

Characterizable Positioners

Manifold (includes filters)/Gage Block

Prev

0

No manifold

1

Manifold with equalizing valve, filters and gage ports (required for dou-

ble acting actuators with manual override)

2

Manifold with equalizing valve inoperable (includes filters and gage

ports) 3

3

Gage block (gage port only) 1

Position Transmitter

0

None (must be 0 for Types AV15, AV16 and AV27)

1

Potentiometric resistive output

2

4 to 20-mA output

Drive Shaft

0

Standard with feedback arm for linear motion

1

0.500-in. square end

2

0.342-in. square end for older DeZurik actuators

3

0.250 in. across flats (UP1 and UP2 after August, 1995)

4

0.375 in. square for DeZurik PowerRac® actuators

5

0.156 in. across flats for NAMUR rotary actuators

Other Options

0

Standard (no other options)

N

NEMA 4X enclosure rating (when installed per drawing C258567)

P

Performance Series — high pneumatic gain for large actuators

NOTES:

1.High temperature Type AV1 positioners are only available without manifolds or position transmitters; however, gage blocks are permitted.

2.Explosionproof Type AV2 positioners are not available with position transmitters or manifolds

3.No longer available as of October 2003..

SPECIFICATIONS

Table 1-3 provides performance specifications of the Type AV1 and Type AV2 positioners. Tables 1-4 and 1-5 provide performance specifications for the position transmitters.

Table 1-3.	Type AV1/2 Positioner Specifications1
Property		Characteristic/Value
Input range
AV11 and AV15		20.7 to 103.4 kPa (3.0 to 15.0 psig)
AV12 and AV16		20.7 to 186.2 kPa (3.0 to 27.0 psig)
AV23 and AV27		4 to 20 mA
Input impedance (Type AV2 only)
Nominal		215 at 22°C (72°F)
Maximum		245 at 60°C (140°F)

SPECIFICATIONS

1 - 7

INTRODUCTION

Table 1-3. Type AV1/2 Positioner Specifications1 (continued)

Property	Characteristic/Value
Standard stroke range (cam selection)
AV__1____	12.7 to 50.8 mm (0.5 to 2.0 in.) linear, rotary input 45°
AV__2____	25.4 to 101.6 mm (1.0 to 4.0 in.) linear, rotary input 90°
Gain	2 adjustment levels by changing gain hinge spring. Refer to the flow
	gain curves as shown in Figures 1-3 and 1-4 for standard and high
	gain units.
Accuracy2
AV1	0.80% of span maximum
AV2	0.90% of span maximum
Resolution
AV1	0.09% of span maximum
AV2	0.30% of span maximum
Hysteresis2
AV1	0.45% of span maximum
AV2	0.70% of span maximum
Repeatability2
AV1	0.12% of span maximum
AV2	0.50% of span maximum
Deadband2
AV1	0.12% of span maximum
AV2	0.30% of span maximum
Linearity2	0.70% of span maximum
Supply pressure	172 to 1034 kPa (25 to 150 psig)
	NOTE: Minimum supply pressure should be 34.4 kPa (5.0 psig) above operating pres-
	sure required by actuator.
Supply pressure effect	0.05% per 6.9 kPa for ±69 kPa change
	(0.05% per 1.0 psi for ±10 psig change)
Capacity (maximum capacity exhaust-	Refer to Figure 1-1.
ing to atmosphere)
Air consumption	Refer to Figure 1-2.
Vibration effect2	<2.0% error for:
	5 to 15 Hz at peak-to-peak constant displacement of 4 mm (0.16 in.)
	15 to 120 Hz at accelerations to 2 Gs
Pneumatic connections	¼-NPT on supply, signal and output connections
	18 -NPT on pressure gages
Materials of construction
Enclosure	Aluminum and <0.5% magnesium
Pilot valve	303 stainless steel
Enclosure classification
Standard	NEMA 3R classification when vent hole is protected from rain using
	rain elbow (½-NPT street elbow, refer to Figure 3-1).
AV______N	NEMA 4X when installed per drawing C258567.

SPECIFICATIONS

1 - 8

INTRODUCTION

Table 1-3. Type AV1/2 Positioner Specifications1 (continued)

Property	Characteristic/Value
Weight
AV1	1.84 kg (4.06 lbs)
AV2 (standard)	2.32 kg (5.11 lbs)
AV2 (explosionproof)	2.95 kg (6.51 lbs)
Temperature limits
Operating
AV11/2	-40°C to 82°C (-40°F to 180°F)3
AV15/6	-20°C to 127°C (-4°F to 250°F)3
AV2	-20°C to 82°C (-4°F to 180°F)3
Storage
AV11/2	-40°C to 93°C (-40°F to 200°F)
AV15/6	-20°C to 127°C (-4°F to 250°F)
AV2	-20°C to 82°C (-4°F to 180°F)
Humidity limits
Operating	0% to 95% noncondensing
Storage	0% to 95% noncondensing
NOTES:

1.Performance testing performed on a ABB Type UP10 actuator.

2.Tested according to ISA-S75.13-1989

3.For operation below 4.4°C (40°F), dew point of the supply air must be 10°C (18°F) lower than the lowest expected operating temperature.

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.

Figure 1-1. Capacity (Exhaust to Atmosphere)

SPECIFICATIONS

1 - 9

INTRODUCTION

Figure 1-2. Air Consumption

Figure 1-3. Output Air Flow vs. Error Signal — Standard and Performance Series

SPECIFICATIONS

1 - 10

INTRODUCTION

	Figure 1-4. Expanded First Quadrant View of Figure 1-3
Table 1-4. Type AV____1__ Potentiometric Position Transmitter Specifications
Property		Characteristic/Value
Total resistance		2000
Power rating		1 W up to 70°C (158°F), 0 W at or above 125°C (257°F)
Wiper rate of change		9.9 nominal per degree of cam rotation
Temperature effect		0.05% (500 ppm) per °C (0.03% (278 ppm) per °F) maximum
Maximum voltage		35 VDC or 30 VAC across the potentiometer ends
Temperature limits
Operating		-40°C to 82°C (-40°F to 180°F)
Storage		-40°C to 93°C (-40°F to 200°F)
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.
Table 1-5. Type AV____2 __ 4 to 20-mA Position Transmitter Specifications
Property		Characteristic/Value
Supply voltage		16 to 34 VDC
Output signal		4 to 20 mA
Output loading		500 at 24 VDC, 1000 at 34 VDC
Accuracy		<0.6% of span (maximum)
Hysteresis		<0.5% of span (maximum)
Ambient temperature effect		<0.063% per °C (<0.035% per °F)
EMI/RFI effect		<1.5% maximum at 10 V/m field strength, 20 to 450 MHz
Temperature limits
Operating		-40°C to 82°C (-40F° to 180°F)
Storage		-40°C to 93°C (-40F° to 200°F)

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.

SPECIFICATIONS

1 - 11

INTRODUCTION

Table 1-6. Agency Approvals1

Nomenclature	Approval/Certification2
AV1and AV23	Factory Mutual Research (FM):	Canadian Standards Association (CSA):
	Approved as nonincendive for:	Certified as:
	Class I, Division 2, Groups A, B, C and D	Class 1, Division 2, Groups A, B, C and D
	Class II, Division 2, Groups F and G	Class II, Division 2, Groups E, F and G
	Class III, Division 2	Class III, Division 2
	Approved as intrinsically safe for:	Certified as intrinsically safe for:
	Class I, Division 1, Groups A, B, C and D	Class I, Division 1, Groups A, B, C and D
	Class II, Division 1, Groups E, F and G	Class II, Division 1, Groups E, F and G
	Class III, Division 1	Class III, Division 1
AV27__0__	Factory Mutual Research (FM):	Canadian Standards Association (CSA):
	Approved as explosionproof for:	Certified as explosionproof for:
	Classes I, II; Division 1, Groups B, C, D,	Classes I, II; Division 1, Groups B, C, D,
	E, F and G	E, F and G
All	This product complies with all applicable European Community product require-
	ments, and specifically with those required to display the CE marking on the product
	nameplate.
NOTES:

1.Hazardous locations approvals for use in flammable atmospheres are for ambient conditions of -25°C to 40°C (-13°F to 104°F), 86 to

106kPa (12.5 to 15.7 psig) with a maximum oxygen concentration of 21%.

2.For installing the positioner in a hazardous location, refer to Product Application Guide, Installing a Type AV Positioner in a Hazardous Location.

	Table 1-7. Accessories1
Accessory	Description
Mounting kits	Dependent on valve stem size (Figure 9-1, kit number 5327321__). For ABB retrofit
	kits, refer to Table 1-8.
Speed control	Regulate time constant of positioner and final control device. Orifices are installed
orifices	directly into positioner output ports (refer to Table 1-9). Speed adjustment can also be
	controlled by using the internal stroke adjustment screws (refer to PILOT VALVE
	STROKE ADJUSTMENT in Section 4).
Pressure gages	For reading signal, supply and output pressures (refer to Table 1-10).
Blank cam	Used to characterize the positioner if the standard cams (square, linear, square root)
	will not produce the desired relationship. Blank cam must be profiled (part number
	5400277_1.
Supply air regulator	Refer to Table 1-11.
Pneumatic position	Refer to Appendix D (Type AV1__0___ positioner only).
transmitter
Air filters	ABB recommends installing an air filter in the supply air line to prevent particles from
	entering the positioner that can lead to malfunctions. Refer to Table 1-12 for filter part
	numbers.
Manifold Filters	For addition or replacement of secondary air filters on manifold-equipped positioners.
	Kit number 258487_1.
Bypass valve	Part number 5326945_1. Refer to Table 9-24 and Figure 9-2.
assembly
NOTE:

1. For recommended spare parts and additional spare parts, refer to Section 9.

SPECIFICATIONS

1 - 12

				INTRODUCTION
	Table 1-8. Rotary Actuator Retrofit Mounting Kits
	Kit Number		Drive Nomenclature	Retrofit Mounting Kit
	5400309_1		UP1, UP2	Type AP positioner to
	258493_1		UP3, UP4	Type AV positioner
	258494_1		UP5, UP6
	258527_1		AC0404
	258528_1		AC0608
	258529_1		AC0816
	258530_2		AC1016
	258527_1		AC0404	ABB part number pilot
	258528_1		AC0608	valve positioner to Type
				AV positioner
	258529_1		AC0816
	258530_1		AC1016
		Table 1-9. Speed Control Orifices1
	Part Number		Size
			mm	in.
	5327327_1		1.02	0.04
	5327327_2		Blank (drill to suit)	Blank (drill to suit)
	NOTE:

1. Speed control can also be obtained by internal positioner adjustment. Refer to PILOT VALVE STROKE ADJUSTMENT in Section 4.

Table 1-10. Pressure Gages

Part Number	Legend		Range
		kPa		psig
5326605_4	Instrument	0 to 200		0 to 30
5326605_5	Supply1	0 to 1,000		0 to 160
5326605_6	Output	0 to 1,000		0 to 160
NOTE:

1. The optional manifold provides gage ports, one for instrument (internal input signal), and two output gages. A supply gage can be installed in the supply line (piping by customer).

Table 1-11. Supply Air Regulators with Gages

	Part Number	Max. Outlet	Max. Inlet	Inlet/Outlet
		Pressure (psig)	Pressure (psig)	Connections
	1951029_5	125	250	¼ NPT

Table 1-12. Supply Air Filters 1

		Max. Inlet	Max. Temperature		Inlet/Outlet
	Part Number	Pressure			Connection
			°C	°F
		(psig)			Size
	5328563_2	250	121.0	125.0	¼ NPT
	NOTE:

1. In-line coalescing filter for removal of solid and liquid contaminants in compressed air. Filter comes with universal mounting bracket and grade 6 filter that is 99.97% efficient at 0.3 micron. Part number 5328563_2 has a zinc bowl.

SPECIFICATIONS

1 - 13

INTRODUCTION

Table 1-13. Component Material List

Component	Material
Housing	Aluminum
Cover	Aluminum
Inserts	Lamond (thermoplastic elstomer)
Window	Lexan® (polycarbonate)
Screws	Stainless steel
Range spring	302 stainless steel
Pilot valve (stem and body)	303 stainless steel
Gain hinge spring	302 stainless steel
Cam	302 stainless steel
Cam shaft	303 stainless steel
Bearings	Bronze
Cam follower arm	Aluminum
Bearing	Stainless steel
Shaft	303 stainless steel
Spring arm	Aluminum
Zero adjustment nut	Aluminum
Indicator	Valox® — unreinforced (polybutylene
	terphthalate)
Tubing	Silicone
Drive arm	Aluminum
Teflon® washers	Teflon
Fasteners	Steel/stainless steel
Signal connector	Nylon
Diaphragms
All except Types AV15 and AV16	Buna-N with Dacron fabric
Types AV15 and AV16	Fluorosilicone with Dacron fabric
Diaphragm plastic parts	Rynite® (FR-530) polyethylene ter-
	phthalate
Gage block (optional)	Aluminum
O-rings
All except Types AV15 and AV16	Buna-N
Types AV15 and AV16	Viton®
Manifold (optional)	Aluminum
Adhesive	Epoxy
Handle	Rynite
Plate	Aluminum
Plug	Stainless steel
Valve	Aluminum
Valve handle	Rynite

SPECIFICATIONS

1 - 14

		INTRODUCTION
	Table 1-13. Component Material List
	Component	Material
	Position transmitter (optional)
	(AV____1/2__)
	Gears	Delrin® (coolymer acetal)
	Gear hub	Brass
	Additional Type AV2 components
	Regulator 1	Polysulfone 1
	Regulator bracket 1	304 stainless steel 1
	Tubing	Nylon
	I/P converter	Copper
		Copper clad glass laminate
		Monel® 405
		Nickel-iron
		Noryl® (phenylene ether/phenylene)
		Polyethylene
		Polyester magnet wire
		Rare earth magnet
		Zinc

NOTE:

1. Regulator not applicable for AV2s after July, 2001.

SPECIFICATIONS

1 - 15

SECTION 2 - DESCRIPTION AND OPERATION

INTRODUCTION

This section describes and explains the functional and physical operation of Type AV1 and AV2 positioners. Figure 2-1 diagrams the operating principles of the positioners. Figure 2-2 shows the placement of a positioner in a typical control system.

Figure 2-1. Operation Diagram

Figure 2-2. Block Diagram

INTRODUCTION

2 - 1

DESCRIPTION AND OPERATION

FUNCTIONAL OPERATION

Type AV positioners operate by balancing opposing forces. Figure 2-1 shows a diagram of the Type AV positioner. A balance beam, hinged at one end and connected to the pilot valve at the other, is acted upon by two forces:

•Upward force of the signal diaphragm assembly.

•Downward force from the range spring.

The input signal pressure determines the diaphragm force. The Type AV1 positioner uses an external input pressure (either 20.7 to 103.4 kilopascals (3.0 to 15.0 pounds per square inch gage) or 20.7 to 186.2 kilopascals (3.0 to 27.0 pounds per square inch gage)). The Type AV2 positioner uses a current to pneumatic converter to generate the input signal pressure.

The range spring force is a function of the shape and position of the cam. The cam is coupled to the cam shaft that is connected through linkage (or coupling) to the actuator. Therefore, range spring tension is a function of the actuator position.

A change in input signal changes the force exerted by the signal diaphragm, moving the balance beam, in turn moving the pilot valve. The pilot valve supplies and/or exhausts air to the actuator that ultimately changes its position. The change in actuator position is fed back to the positioning cam. The positioning cam moves, changing the tension of the range spring until a balanced condition once again exists.

The positioner is normally located in a control loop (Fig. 2-2) between the controller and the actuator.

Actuator position is fed back to the positioner for comparison with the position commanded by the input control signal (direct signal pressure or a current value). For linear motion actuators, the feedback mechanism consists of:

•A drive rod that follows the motion of the actuator.

•An adjustable-length, swivel-ended connecting link that transmits the motion of the drive rod to an adjustable drive arm on the positioner.

•A camshaft and cam that are rotated through an angle by the drive arm. A function of the cam is to permit characterization of actuator position versus input signal.

FUNCTIONAL OPERATION

2 - 2

SECTION 3 - INSTALLATION

INTRODUCTION

Several applications are possible using a Type AV positioner. The steps for installing a Type AV positioner are in sequence in this section. After installation is complete, refer to Section 4 for calibration information.

•Unpack and inspect the equipment.

•Mount the positioner.

•Connect tubing to the positioner.

•Connect wiring to the positioner.

NOTES:

1.For application in a hazardous location, refer to ABB Product Application Guide, Installing a Type AV Positioner in a Hazardous Location.

2.Appendix B provides a quick start guide for the Type AV positioner. It is intended for control engineers having extensive experience in the use and application of pneumatic positioners. The quick start guide highlights the major points of installation and calibration. Detailed installation and calibration information is contained in this section and in Section 4.

Select an installation method that provides a fail safe mode upon loss of controller signal. Certain installation methods

WARNING do not stroke the equipment to a fail safe condition upon loss of controller signal. Failure to select a fail safe installa-

tion method could cause injury to personnel and damage to equipment.

UNPACKING AND INSPECTION

1.Check for obvious damage to the shipping carton.

2.Open the carton and remove all loose packing.

3.Carefully remove the positioner from the carton and inspect for any physical damage that may have occurred during shipping.

4.Remove the two cover screws and the positioner cover and examine the interior for any loose components such as nuts, screws, springs, etc. Check the data on the nameplate to be certain the positioner type ordered for the application was received.

INTRODUCTION

3 - 1

INSTALLATION

5.If the positioner is suitable for the application and appears undamaged, install the cover and proceed with the installation instructions.

6.If storing the positioner prior to installation, leave it in the original carton, if possible. Store in an area free from corrosive vapors and extremes in temperature and humidity.

7.Do not store the positioner in an area that would take it out of the specifications listed in Tables 1-3, 1-4 and 1-5.

ENCLOSURE CLASSIFICATION

The standard enclosure for the Type AV1 and Type AV2 positioners conform to NEMA 3R when a ½-14 NPT street elbow (Fig. 3-1) is installed into the vent hole on the housing. The elbow prevents water or other liquid from entering the enclosure. The position of the elbow is related to the mounting plane of the positioner in its service location. The elbow must be positioned to face downward. The NEMA 3R version meets the extended corrosion resistance requirements of NEMA 250.

A NEMA 4X version is available as an option (Type AV______N positioners). To maintain the NEMA 4X classification, the positioner shall be installed per drawing C258567 and suitable piping shall be attached to the vent opening and vented in a manner to preclude the entrance of water under pressure, as from a hose. Additionally, the conduit connections shall be suitable for a NEMA 4X rating.

MOUNTING CONSIDERATIONS

Choose a location for the positioner based on the following factors:

•Access to the internal positioner adjustments — the mounting location should provide enough room to remove the cover in order to perform calibration and repair and replacement procedures inside the positioner. Refer to Figure 3-1 for positioner dimensions. Figure 3-2 shows the electrical connections, Figure 3-3 shows the dimensions of the drive arm connections and Figure 3-4 shows the drive shaft variations.

•Allow room for linkage to the actuator — the mounting position should be such that a practical linkage arrangement can be made between the positioner and the actuator for full range travel.

ENCLOSURE CLASSIFICATION

3 - 2

INSTALLATION

Figure 3-1. External and Mounting Dimensions

MOUNTING CONSIDERATIONS

3 - 3